{"id":138223,"date":"2020-07-21T05:17:17","date_gmt":"2020-07-20T21:17:17","guid":{"rendered":"http:\/\/4563.org\/?p=138223"},"modified":"2020-07-21T05:17:17","modified_gmt":"2020-07-20T21:17:17","slug":"linux-%e4%b8%8b%e5%a6%82%e4%bd%95%e5%85%b3%e9%97%ad-cpu-cache%ef%bc%9f","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=138223","title":{"rendered":"Linux \u4e0b\u5982\u4f55\u5173\u95ed CPU cache\uff1f"},"content":{"rendered":"
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Linux \u4e0b\u5982\u4f55\u5173\u95ed CPU cache\uff1f <\/h1>\n

<\/p>\n

\n
\u8cc7\u6df1\u5927\u4f6c : vcfghtyjc <\/span> <\/i> 5<\/span> <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n
<\/p>\n

\u4e3a\u4e86\u907f\u514d\u7531\u4e8e\u6570\u636e\u5728\u4e0d\u540c\u5c42\u7684 cache \u6240\u5e26\u6765\u7684\u8fd0\u884c\u65f6\u95f4\u7684\u5dee\u5f02\uff0c\u6211\u60f3\u8981\u5173\u95ed CPU cache\uff0c\u8ba9\u6240\u6709\u6570\u636e\u90fd\u5b58\u5728 DRAM \u91cc\u3002\u7a0d\u5fae\u641c\u7d22\u4e86\u4e00\u4e0b\uff0c\u597d\u50cf\u6ca1\u4ec0\u4e48\u6e05\u6670\u7684\u89e3\u51b3\u65b9\u6848\uff0c\u60f3\u95ee\u95ee\u6709\u6ca1\u6709\u5927\u795e\u77e5\u9053\u5982\u4f55\u505a\u3002<\/p>\n

\u8c22\u8c22\uff01<\/p>\n<\/p><\/div>\n

\u5927\u4f6c\u6709\u8a71\u8aaa<\/b> (100<\/span>) <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n
    \n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : yangbonis <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    cpu \u6ca1\u6709\u63d0\u4f9b\u8fd9\u4e2a\u529f\u80fd\uff0ccache \u5c31\u662f cpu \u7684\u4e00\u90e8\u5206\uff0c\u4e0b\u7535\u5c31\u5173\u4e86 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : venster <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    Q\uff1a\u5317\u4eac\u5230\u4e0a\u6d77\u7684\u9ad8\u94c1\u592a\u5bc6\u96c6\uff0c\u573a\u7ad9\u5458\u5de5\u62b1\u6028\u538b\u529b\u5927
    A\uff1a\u6ca1\u95ee\u9898\uff0c\u8fd9\u5c31\u628a\u9ad8\u94c1\u505c\u4e86 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : dalabenba <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \/proc\/iomem \u83b7\u53d6\u5206\u5e03\u4fe1\u606f\uff0c\/proc\/mtrr \u6539 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : nightwitch <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    cpu cache \u662f cpu \u7684\u7ec4\u6210\u5143\u4ef6\uff0c\u8fd9\u8fd8\u80fd\u5173\u6389\u7684\uff1f \u4f60\u5148\u8bf4\u6e05\u695a\u662f\u4ec0\u4e48\u95ee\u9898\u5bfc\u81f4\u4f60\u6709\u8fd9\u4e2a\u9700\u6c42\uff0c\u5927\u4f19\u518d\u6765\u8ba8\u8bba\u89e3\u51b3\u65b9\u6848 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : nightwitch <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    gcc \u5185\u7f6e\u7684__builtin___clear_cache\uff0c__builtin_prefetch \u4ee5\u53ca Linux \u7684 cacheflush \u53ef\u80fd\u6709\u70b9\u7528\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : dalabenba <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @dalabenba \u5f53\u7136\u4f60\u8981\u6392\u9664\u662f\u4e0d\u662f cache \u7684\u5f71\u54cd\u901f\u5ea6\u7684\u8bdd\u5e94\u8be5\u7528 perf \u53bb\u770b cache miss \u7387\u800c\u4e0d\u662f\u5173 cache\uff0c\u6bd5\u7adf\u4ee3\u7801\u90fd\u662f\u8d8a\u5feb\u8d8a\u597d <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : vcfghtyjc <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @dalabenba \u8c22\u8c22\u3002\u80fd\u5426\u8be6\u7ec6\u8bf4\u4e00\u4e0b\u600e\u4e48\u4f7f\u7528\u5417\uff1f\u6211\u901a\u8fc7 `\/proc\/iomem` \u770b\u5230\u4e86\u5404\u4e2a\u786c\u4ef6\u8bbe\u5907\u7684\u5185\u5b58\uff0c\u4f46\u662f\u6ca1\u770b\u5230 cpu \u7684 cache \u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : vcfghtyjc <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @dalabenba \u56e0\u4e3a\u7cfb\u7edf\u91cc\u8fd8\u6709\u5176\u4ed6\u5f71\u54cd\u56e0\u7d20\uff0c\u6211\u662f\u5e0c\u671b\u5148\u5173\u6389 cache\uff0c\u907f\u514d\u7531\u4e8e locality \u5e26\u6765\u7684\u5e72\u6270\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : vk42 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u8d5e\u6210#6\uff0c\u9664\u4e86\u8c03\u8bd5 CPU bug \u7684\u57fa\u672c\u6ca1\u89c1\u8fc7\u5173 cache \u6765\u505a performance profiling \u7684\uff0c\u4f60\u53ea\u662f\u6ca1\u627e\u5230\u5bf9\u7684\u5de5\u5177\u548c\u65b9\u6cd5\u3002
    \u73b0\u5728 CPU \u5173 cache \u975e\u5e38 tricky\uff0c\u4ee5\u524d\u8001\u578b\u53f7\u8fd8\u6709\u80fd\u5728 BIOS \u91cc\u5168\u5c40\u5173\u7684 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : misaka19000 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u4f60\u80fd\u4fdd\u8bc1\u64cd\u4f5c\u7cfb\u7edf\u5728\u8fdb\u7a0b schedule \u7684\u8fdb\u7a0b\u8fd0\u884c\u65f6\u95f4\u4e00\u81f4\u5417\uff0c\u5982\u679c\u8fd9\u4e2a\u90fd\u4fdd\u8bc1\u4e0d\u4e86\u5c31\u5148\u4e0d\u8981\u8003\u8651 CPU \u7684 cache \u4e86 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : Nich0la5 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u8fd9\u662f\u4ec0\u4e48\u9b54\u9b3c\u9700\u6c42\u8fd8\u9700\u8981\u5173 cache \u7684\uff1f <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : wnpllrzodiac <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    cache \u901f\u5ea6\u6bd4\u5185\u5b58\u90fd\u5feb\uff0c\u6ca1\u4e86 cache cpu \u5c31\u53d8\u6e23\u6e23\u4e86\u554a <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : Juszoe <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u5173\u95ed cache\uff0c\u8fd9\u901f\u5ea6\u4e0d\u5f97\u5012\u9000\u5341\u51e0\u5e74 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : em70 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u8bf4\u5f97\u597d\u50cf\u4f60\u77e5\u9053 CPU cache \u91cc\u5b58\u7684\u662f\u5565\u4e00\u6837 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : kokutou <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u6ca1\u4e86 cache\uff0c\u5f00\u673a\u6015\u662f\u90fd\u8981 2 \u5c0f\u65f6 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : tempdban <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u5144\u5f1f\uff0c\u5c31\u7b97\u662f\u5173\u95ed\u4e86\u5e7f\u4e49\u7684 cache,cpu \u91cc\u8fb9\u7684\u53e6\u4e00\u4e9b cache \u4f60\u662f\u6c38\u8fdc\u5173\u4e0d\u6389\u7684\uff0c\u5982\u679c\u4f60\u6709\u6027\u80fd\u4f18\u5316\u6709\u5173\u7684\u95ee\u9898\uff0c\u53ef\u4ee5\u5c1d\u8bd5\u8054\u7cfb\u6211 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : nevin47 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    LZ \u4f60\u8981\u77e5\u9053\uff0c\u5f53\u524d\u4e3b\u6d41 CPU \u7684 architecture \u51b3\u5b9a\u4e86\u6570\u636e\u672c\u6765\u5c31\u662f\u5c42\u5c42\u900f\u8fc7 cache \u5230\u8fbe cpu \u91cc\u9762\u7684\uff0c\u5b8c\u5168 disable cacheline \u662f\u51e0\u4e4e\u4e0d\u53ef\u80fd\u7684\uff0c\u4e0d\u8fc7\u5b9e\u5728\u60f3\u8fd9\u4e48\u73a9\uff0c\u53ef\u4ee5\u9b54\u6539\u4e00\u4e0b mm\uff0c\u8ba9\u4f60\u6240\u6709\u62ff\u5230\u7684\u5185\u5b58\u90fd\u6807\u8bb0\u4e0a nocache\uff0c\u8fd9\u6837\u6bcf\u6b21\u5185\u5b58\u8bed\u4e49\u90fd\u4f1a\u4ece\u5185\u5b58\u540c\u6b65\u4e00\u6b21 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : aijam <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    https:\/\/stackoverflow.com\/questions\/48360238\/how-can-the-l1-l2-l3-cpu-caches-be-turned-off-on-modern-x86-amd64-chips <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : realpg <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u771f\u662f\u9e1f\u5927\u4e86\u5565\u6797\u5b50\u90fd\u89c1\u8fc7\u4e86\u2026\u2026 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : reus <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u4f60\u4eec\u90fd\u4e0d\u4f1a\u7528\u641c\u7d22\u5f15\u64ce\u7684\u5417\uff1f
    \u8fd9\u6837\u641c\uff1adisable cpu L1 cache
    \u7136\u540e\u4f60\u5c31\u4f1a\u53d1\u73b0\u8fd9\u4e2a\uff1a https:\/\/stackoverflow.com\/questions\/48360238\/how-can-the-l1-l2-l3-cpu-caches-be-turned-off-on-modern-x86-amd64-chips
    \u548c\u8fd9\u4e2a\uff1a https:\/\/unix.stackexchange.com\/questions\/316684\/how-to-disable-processors-l1-and-l2-caches <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : sunnybird <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u5927\u4f6c\u5728\u505a\u5565\u5b50\u5462 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : Dox <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u4f60\u8fd9\u95ee\u9898\u548c\u201c\u600e\u4e48\u8ba9\u7535\u8111\u62d4\u4e86\u5185\u5b58\u8fd8\u80fd\u8fd0\u884c\u201d\u5dee\u4e0d\u591a <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : ghostheaven <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    google \u4e00\u4e0b\uff0c\u6709\u4e2a kernel module \u53ef\u4ee5\u505a\u8fd9\u4e2a\u4e8b\u60c5<\/p>\n

    https:\/\/unix.stackexchange.com\/questions\/316684\/how-to-disable-processors-l1-and-l2-caches <\/p><\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : realpg <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @reus #20
    \u7136\u800c \u8fd9\u91cc\u9762\u8bf4\u7684\u90fd\u4e0d\u662f\u771f\u6b63\u610f\u4e49\u4e0a\u7684\u5173 CACHE
    \u6309\u7167\u8fd9\u4e2a\u64cd\u4f5c\uff0ccache \u5c31\u6210\u4e86\u4e3b\u7406\u89e3\u7684\u6837\u5b50\uff0c\u53d8\u6210\u4e86\u4e00\u79cd\u5f88\u5feb\u7684 ram\u2026\u2026 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : reus <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @realpg \u6211\u4e0d\u77e5\u9053\u4f60\u5728\u8bf4\u4ec0\u4e48\u3002\u53cd\u6b63 intel \u624b\u518c\u91cc\u662f\u8fd9\u6837\u5199\u7684\uff1a<\/p>\n

    11.5.3 Preventing Caching<\/p>\n

    To disable the L1, L2, and L3 caches after they have been enabled and have received cache fills, perform the following steps:<\/p>\n

    1. Enter the no-fill cache mode. (Set the CD flag in control register CR0 to 1 and the NW flag to 0.
    2. Flush all caches using the WBINVD instruction.
    3. Disable the MTRRs and set the default memory type to uncached or set all MTRRs for the uncached memory type (see the discussion of the discussion of the TYPE field and the E flag in Section 11.11.2.1, \u201cIA32_MTRR_DEF_TYPE MSR\u201d).<\/p>\n

    The caches must be flushed (step 2) after the CD flag is set to insure system memory coherency. If the caches are not flushed, cache hits on reads will still occur and data will be read from valid cache lines.The intent of the three separate steps listed above address three distinct requirements: (i) discontinue new data replacing existing data in the cache (ii) ensure data already in the cache are evicted to memory, (iii) ensure subse-quent memory references observe UC memory type semantics. Different processor implementation of caching control hardware may allow some variation of software implementation of these three requirements. See note below.<\/p>\n

    \u6216\u8005\u4f60\u53ef\u4ee5\u53ea\u770b\u7b2c\u4e00\u53e5\uff1a\u201cTo disable the L1, L2, and L3 caches \u201d\u3002 <\/p><\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : imbushuo <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @reus \u4ece\u7a0b\u5e8f\u5458\u7684\u89d2\u5ea6\uff0ccache \u88ab\u5173\u6389\u4e86\uff1b\u4ece\u67b6\u6784\u7684\u89d2\u5ea6\uff0ccache \u8fd8\u662f\u5728\u90a3\u91cc\uff0cdata path \u6ca1\u6709\u6539\u53d8\uff08\u6240\u4ee5\u770b\u600e\u4e48\u7406\u89e3\u4e86 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : realpg <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @reus #25
    AMD \u6211\u662f\u4e0d\u6e05\u695a\u3002
    \u4f60\u5bf9 Intel CPU \u7684\u673a\u5236\u4e00\u65e0\u6240\u77e5\uff0c\u5c31\u5355\u7eaf\u770b\u4e86\u90a3\u4e2a\u6807\u9898\uff0c\u5c31\u89c9\u5f97\u4f60\u61c2\u4e86\u800c\u5df2\u3002<\/p>\n

    \u65e2\u7136\u4f60\u5565\u4e5f\u4e0d\u61c2\uff0c\u6240\u4ee5\u6211\u5c31\u544a\u8bc9\u4f60\u7ed3\u8bba\u597d\u4e86\u3002<\/p>\n

    \u7ecf\u8fc7 intel \u624b\u518c\u7684\u8fd9\u4e2a\u64cd\u4f5c\uff0cL3 Cache \u4f1a\u53d8\u6210\u4ec0\u4e48\u6837\u6211\u4e0d\u6e05\u695a\uff0c\u56e0\u4e3a\u6211\u6298\u817e\u8fd9\u73a9\u610f\u7684\u65f6\u4ee3\uff0c\u53ea\u6709\u670d\u52a1\u5668 CPU \u6709 L3\uff0c\u666e\u904d CPU \u53ea\u6709 L2\uff0c\u800c\u4e14 L1 L2 \u8fd9\u51e0\u5e74\u7684\u673a\u5236\u548c\u7279\u6027\u90fd\u6ca1\u53d8\u5316\u3002\u5728\u8fd9\u4e9b\u64cd\u4f5c\u4ee5\u540e\uff0cL1 L2 \u4f1a\u53d8\u6210\u8ddf RAM \u4e00\u6837\u7684\u7528\u9014\uff0c\u7136\u540e\u901f\u5ea6\u6bd4 RAM \u5feb\u5f88\u591a\u3002<\/p>\n

    \u5982\u679c\u4e0d\u7ecf\u8fc7\u8fd9\u4e2a\u64cd\u4f5c\uff0cL1 L2 \u5e76\u4e0d\u662f\u4e00\u79cd\u8d85\u5feb\u7684 RAM\uff0c\u662f\u8981\u53c2\u4e0e CPU \u903b\u8f91\u7684\u3002 <\/p><\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : nevin47 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @realpg \u6b63\u89e3\uff0cdata path \u662f\u4e0d\u4f1a\u53d8\u7684 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : realpg <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @nevin47 #28
    \u73b0\u4ee3\u7684\u5e74\u8f7b\u4eba\u5f88\u5c11\u7ecf\u5386 CPU \u7ea7 BUG\uff0c\u6240\u4ee5\u5bf9\u8fd9\u4e9b\u90fd\u4e00\u65e0\u6240\u77e5\u3002
    \u4e0d\u8fc7\u4f30\u8ba1\u672a\u6765\u56fd\u4ea7 X86 \u4f4e\u7aef CPU \u5f00\u5356+\u653f\u91c7\u591a\u4e86\u4ee5\u540e\uff0c\u4f30\u8ba1\u5c31\u8981\u56de\u5230\u6211\u4eec\u778e\u6298\u817e\u90a3\u4e2a\u5e74\u4ee3\uff0c\u4f1a\u906d\u9047 CPU BUG\u2026\u2026
    \u7136\u540e\u5c31\u6709\u673a\u4f1a\u4e86\u89e3\u5e95\u5c42 CPU \u6d41\u7a0b\uff0c\u5404\u79cd\u6c47\u7f16\u5e95\u5c42\u5f00\u5173\u4e86 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : inframe <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u6700\u5feb\u7684 SRAM \u653e\u7740\u4e0d\u7528\uff0c\u8981\u8d70\u603b\u7ebf\u76f4\u63a5\u8bfb\u5199 DRAM \uff1f <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : reus <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @imbushuo \u6240\u4ee5\u8fd9\u6837\u505a\uff0c\u53ef\u4ee5\u6d88\u9664 cache locality \u5417\uff1f\u4e3b\u5c31\u662f\u60f3\u8fbe\u5230\u8fd9\u4e2a\u76ee\u7684\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : reus <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @realpg \u72d7\u5c41\u4e0d\u901a\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : xyjincan <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    System.sleep(1000) <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : dalabenba <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @vcfghtyjc iomem \u91cc\u9762\u662f\u5185\u5b58\u5e03\u5c40\uff0csystem ram \u5c31\u662f\uff0ccache \u662f\u8981\u4fee\u6539\u9875\u8868\u5c5e\u6027\u7684\uff0c\u5728 bios \u9636\u6bb5\u4f1a\u8bbe\u7f6e mtrr,\u8d77\u6765\u540e\u4fee\u6539\u5bf9\u4e8e\u5e94\u9875\u8868\u7684 pat \u6765\u533a\u5206 cache \u884c\u4e3a\u7684\uff0c\u6211\u4e5f\u6ca1\u8bd5\u8fc7\u5728\u8fd0\u884c\u72b6\u6001\u4e0b\u4fee\u6539 mtrr
    \u4f60\u53ef\u4ee5\u8bf4\u4e0b\u5982\u679c\u5173\u4e86 cache \u4f60\u9884\u671f\u4f1a\u51fa\u73b0\u4ec0\u4e48\u7ed3\u679c\uff0c\u4f60\u80fd\u5f97\u5230\u4ec0\u4e48\u7ed3\u8bba\uff0c\u8bf4\u4e0d\u5b9a\u6709\u522b\u7684\u529e\u6cd5 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : cheng6563 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u73b0\u4ee3\u7684 CPU \u684c\u9762 CPU \u4fdd\u8bc1\u4e0d\u4e86\u8fd0\u884c\u65f6\u95f4\u4e00\u81f4\u5427 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : DoctorCat <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u8ba9 v2 \u5c11\u4e00\u4e9b\u4e89\u5435\uff0c\u82f1\u7279\u5c14\u793e\u533a\u7ed9\u4f60\u53c2\u8003\uff1a https:\/\/software.intel.com\/en-us\/comment\/1746645 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : ryncsn <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @realpg RAM \u4e00\u6837\u7684\u7528\u9014\uff1f\u5177\u4f53\u662f\u4ec0\u4e48\u6837\u7684\uff1f\u5f88\u597d\u5947\uff0c\u53ef\u4ee5\u901a\u8fc7\u5730\u5740\u8bbf\u95ee\uff1f <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : wangritian <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u907f\u514d\u7a0b\u5e8f\u8fd0\u884c\u8fc7\u5feb\uff1f <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : barrysn <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u5efa\u8bae\u53bb\u7ffb\u4e00\u904d\u8ba1\u7b97\u673a\u7ec4\u6210\u539f\u7406 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : lonewolfakela <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u8981\u641e\u8fd9\u79cd\u7ea7\u522b\u7684 profiling \u7684\u8bdd\uff0c\u4e00\u822c\u90fd\u662f\u5f04\u4e2a gem5 \u4e4b\u7c7b\u7684 cpu \u4eff\u771f\u5668\u5427\u2026\u2026 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : realpg <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @ryncsn #37
    CPU \u5c42\u9762\u5bf9\u4e8e\u5185\u5b58\u7684\u4f7f\u7528\uff0c\u5e76\u4e0d\u90fd\u662f\u4f60\u4e3b\u52a8 malloc \u7684\u5206\u914d<\/p>\n

    \u8fd9\u662f\u4ed6\u5185\u7ba1\u7406\u7684 \u5bf9\u4e8e data \u7684\u903b\u8f91\u7f13\u5b58 nfc \u6253\u5f00\u6216\u8005\u5728\u6307\u4ee4\u4f20\u9012\u65f6\u5019\u6253\u4e0a no cache \u6807\u5fd7 \u5c31\u4e0d\u4f1a\u5728 cache \u91cc\u9762\u7559\u4e0b hot cache \u4f46\u662f\u4e0d\u4ee3\u8868\u4e0d\u7ee7\u7eed\u4f7f\u7528\u6570\u636e\u548c\u6307\u4ee4\u7684 L1 \u4ee5\u53ca\u5927 L2 cache <\/p><\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : Nadao <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u5728\u8fd8\u662f DIY \u7535\u8111\u4e3a\u4e3b\u6d41\u7684\u5e74\u4ee3\uff0cBIOS \u91cc\u9762\u5c31\u53ef\u4ee5\u5173\u4e86 L1\/L2 \u3002\u4f46\u5173\u4e86\u4f1a\u975e\u5e38\u975e\u5e38\u6162\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : systemcall <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @realpg #29
    \u8fd9 15 \u5e74\u4f60\u89c1\u8fc7\u8d85\u8fc7 400 \u7684 X86 \u4f4e\u7aef CPU \u5417\uff1f
    \u6309\u7167\u4ef7\u683c\u6765\u7b97\uff0c\u611f\u89c9\u4e00\u70b9\u4e5f\u4e0d\u4f4e\u7aef\uff0c\u751a\u81f3\u53ef\u4ee5\u7b97\u9ad8\u7aef
    \u5728\u529e\u516c\u7528 PC \u7684\u8303\u56f4\u5185\u8ba8\u8bba <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : lxilu <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u5176\u4ed6\u5904\u7406\u5668\u52a0\u901f\u529f\u80fd\u5462\uff1f <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : vcfghtyjc <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @dalabenba \u76ee\u524d\u6211\u8fd0\u884c\u540c\u4e00\u6bb5\u4ee3\u7801\u591a\u6b21\uff0c\u901a\u8fc7 KNN \u6211\u4eec\u53ef\u4ee5\u5c06\u4ee3\u7801\u8fd0\u884c\u65f6\u95f4\u5206\u6210 4 \u4e2a clusters\uff0ccpu \u7684\u578b\u53f7\u663e\u793a\u6709\u4e09\u5c42 cache\uff0c\u6211\u5c31\u60f3\u901a\u8fc7\u5173\u95ed cache\uff0c\u89c2\u5bdf\u8fd0\u884c\u65f6\u95f4\u662f\u5426\u8fd8\u4f1a\u88ab\u5206\u4e3a 4 \u4e2a clusters \u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : vcfghtyjc <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @Nadao \u73b0\u5728\u662f\u5426\u6709\u652f\u6301\u5173\u95ed L1\/L2 \u7684 BIOS \u3002\u6211\u770b\u5230\u6709\u65b9\u6cd5\u662f\u8fd9\u4e48\u8bf4\u7684\uff0c\u4e5f\u6709\u4eba\u8bf4\u8fd0\u884c\u72b6\u6001\u4e0b\u65e0\u6cd5\u5173\u95ed cache \u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : helloworld000 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u5982\u679c\u662f\u505a\u5b9e\u9a8c\u7684\u8bdd, \u6700\u76f4\u63a5\u7684\u529e\u6cd5\u5c31\u662f\u6bcf\u6b21\u8dd1\u8fd9\u4e2a\u7a0b\u5e8f\u7684\u65f6\u5019\u90fd\u91cd\u542f\u4e00\u6b21\u7535\u8111 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : vcfghtyjc <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @realpg \u770b\u8d77\u6765\u7ecf\u8fc7 intel \u6587\u6863\u91cc\u7684\u65b9\u6cd5\uff0c\u6570\u636e\u4f9d\u7136\u4f1a\u4ece DRAM \u7ecf\u8fc7 L3\/L2\/L1 cache \u5230 CPU \uff1f\u662f\u5426\u53ef\u4ee5\u7406\u89e3\u4e3a\u6240\u6709\u6570\u636e\u90fd\u662f\u4ece DRAM \u7ecf\u8fc7 cache \u5230 CPU\uff0c\u4ed6\u4eec\u79fb\u52a8\u7684\u8ddd\u79bb\u662f\u4e00\u6837\u7684\uff1f <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : samuel <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u7981\u7528\u4e86 cpu cache \u7684\u6d4b\u8bd5\u7ed3\u679c\u6ca1\u6709\u5b9e\u9645\u610f\u4e49\uff0c\u6ca1\u6709\u4eba\u4f1a\u8fd9\u4e48\u7528\uff0c\u56e0\u4e3a\u5b9e\u5728\u662f\u592a\u6162\u4e86 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : vcfghtyjc <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @helloworld000 \u662f\u4e2a\u65b9\u6cd5\u3002\u4e0d\u8fc7\u6211\u7684\u5b9e\u9a8c\u73af\u5883\u5e94\u8be5\u6ca1\u6709\u522b\u7684\u5e94\u7528\u5728\u8fd0\u884c\uff08\u9664\u4e86\u64cd\u4f5c\u7cfb\u7edf\u7684\uff09\uff0c\u4e0d\u77e5\u9053\u4f1a\u6709\u591a\u5c11\u63d0\u5347\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : helloworld000 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @vcfghtyjc \u56e0\u4e3a\u5f53\u521d\u4e5f\u6709\u8fc7\u7c7b\u4f3c\u7ecf\u5386, database \u7684 benchmark…\u5c31\u662f\u505a\u5b8c\u4e00\u6b21 benchmark \u5c31\u91cd\u542f\u7cfb\u7edf<\/p>\n

    \u8fd9\u662f\u6700\u76f4\u63a5\u7684\u529e\u6cd5\u4e86, \u6ca1\u6709\u4e4b\u4e00 <\/p><\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : realpg <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @vcfghtyjc #48
    \u8ddd\u79bb\u4e00\u6837\uff0c\u4f46\u662f\u65f6\u95f4\u662f\u4e0d\u4e00\u6837\u7684\u3002
    \u6211\u5176\u5b9e\u4e5f\u4e0d\u662f\u641e\u8fd9\u4e2a\u7684\uff0c\u53ea\u662f\u65e9\u5e74\u53c2\u4e0e\u8c03\u8bd5\u8fc7 cpu bug\uff0c\u8ddf intel \u7684\u5de5\u7a0b\u5e08\u4e00\u8d77\u641e\u8fc7\u8fd9\u4e9b\u4e1c\u897f\uff0c\u4ed6\u4eec\u4f1a\u5f88\u901a\u4fd7\u7684\u7ed9\u4f60\u8bb2\u8fd9\u4e9b\u4e1c\u897f\u3002
    \u8fd9\u73a9\u610f\u600e\u4e48\u7406\u89e3\u597d\u5462\uff0c\u4e0d\u592a\u6b63\u786e\u7684\u8bf4\uff0c\u9ed8\u8ba4\u7684\u60c5\u51b5\u4e0b\uff0ccache \u7684\u4e00\u90e8\u5206\u529f\u80fd\u662f cpu \u76f4\u63a5\u6267\u884c\u5355\u5143\u7684\u5c0f ram\uff0c\u4e0d\u9700\u8981\u4f60\u5173\u5fc3\uff0c\u7531 CPU \u51b3\u5b9a\u6709\u4e9b\u6c47\u7f16\u6307\u4ee4\u7684\u4e2d\u95f4\u5b58\u50a8\u653e\u8fdb\u53bb\uff0c\u7136\u540e\u8fd8\u6709\u4e00\u90e8\u5206\u529f\u80fd\u6bd4\u5982\u6307\u4ee4\u7f13\u5b58\u3001\u6570\u636e\u7f13\u5b58\uff0c\u8fd9\u90e8\u5206\u5c31\u662f\u6bd4\u8f83\u5b57\u9762\u610f\u4e49\u7684 cache \u4e86\uff0c\u8fd8\u6709\u4e00\u4e9b\u590d\u6742\u6307\u4ee4\u672c\u8eab\u5c31\u4e0d\u662f\u4e00\u6b65\u6307\u4ee4\uff0c\u9700\u8981\u4e2d\u95f4\u903b\u8f91\u5b58\u50a8\uff0c\u6216\u8005\u4e00\u5207\u5176\u4ed6\u9700\u8981\u6267\u884c\u5207\u6362\u573a\u666f\uff0c\u5c31\u4f1a\u4e34\u65f6\u6027\u7684\u653e\u8fdb\u53bb\uff0c\u5341\u5e74\u524d\u8fd9\u91cc\u9762\u7684\u529f\u80fd\u5c31\u5f88\u590d\u6742\u4e86\u3002<\/p>\n

    \u8fd9\u73a9\u610f\u662f\u6ca1\u6cd5\u5173\u95ed\u7684\u3002\u5c31\u597d\u50cf\u8bf4\uff0c\u6211\u4e0d\u5728\u4e4e\u6162\uff0c\u6211\u4e0d\u8981 RAM \u4e86\uff0c\u6162\u70b9\u6211\u80fd\u5fcd\uff0c\u76f4\u63a5\u64cd\u4f5c SSD\uff0c\u662f\u6ca1\u6709\u8fd9\u79cd\u63a5\u53e3\u7684\u3002
    \u5b9e\u9645\u4e0a\uff0cCPU \u7684\u5927\u90e8\u5206\u901a\u7528\u529f\u80fd\u7684\u6570\u636e\u8fdb\u53e3\u548c\u51fa\u53e3\u5c31\u662f\u8fd9\u4e2a cache \u3002\u8fd9\u91cc\u9762\u5177\u4f53\u7684\u7ec6\u8282\uff0c\u5c31\u5f97\u8ddf intel \u5de5\u7a0b\u5e08\u53bb\u804a\u4e86\u3002<\/p>\n

    \u4e0a\u90a3\u4e2a\u5634\u786c\u7684\uff0c\u4ed6\u5f15\u7528\u90a3\u4e2a\u5e16\u5b50\uff0c\u5c31\u597d\u50cf\uff0c\u4f60\u53bb\u624b\u673a\u5e97\u4e70\u624b\u673a\uff0c\u5f20\u5634\u6211\u8981 256G \u5185\u5b58\u7684\uff0c\u5e97\u5458\u662f\u4e0d\u4f1a\u975e\u5f97 SB \u4f3c\u7684\u7ea0\u6b63\u4f60\u90a3\u662f 256G \u786c\u76d8\uff0c\u4e0d\u662f 256G \u5185\u5b58\uff0c\u4ed6\u5c31\u7ed9\u4f60\u4e00\u4e2a 8+256 \u7684\u624b\u673a\uff0c\u4ed6\u77e5\u9053\u4f60\u8981\u5e72\u5565\uff0c\u6216\u8005\u8bf4\uff0c\u6700\u591a\u80fd\u5e72\u5230\u5565\u5730\u6b65\u800c\u5df2\u3002<\/p>\n

    \u8fd9\u91cc\u9762\u7684\u673a\u5236\u57fa\u672c\u6211\u662f\u7c97\u4e86\u89e3\uff0c\u6211\u73b0\u5728\u4e5f\u662f\u641e\u8fd0\u7ef4\u548c\u67b6\u6784\u8bbe\u8ba1\u7684\uff0c\u6211\u4e0d\u9700\u8981\u4e86\u89e3\u5230 CPU \u5177\u4f53\u548b\u5de5\u4f5c\uff0c\u4f46\u662f\u6982\u5ff5\u4e00\u5b9a\u8981\u6709\uff0c\u4ec5\u6b64\u800c\u5df2\u3002 <\/p><\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : vcfghtyjc <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @helloworld000 \u6548\u679c\u548c\u4e0d\u91cd\u542f\u6bd4\u6709\u5f88\u660e\u663e\u4e0d\u540c\u5417\uff1f <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : vcfghtyjc <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @realpg \u8ddd\u79bb\u611f\u89c9\u5360\u4e86\u6267\u884c\u65f6\u95f4\u7684\u5f88\u5927\u4e00\u90e8\u5206\u3002\u76ee\u524d\u7a0b\u5e8f\u7684\u6807\u51c6\u5dee\u5927\u6982\u662f 1000 ns\uff0c\u5982\u679c\u4fdd\u8bc1\u4e86\u8ddd\u79bb\u4e00\u6837\u662f\u5426\u80fd\u51cf\u5c11\u5230\u6bd4\u5982\u51e0\u767e\u7eb3\u79d2\uff1f <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : vk42 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @realpg #27 #41
    \u672c\u6765\u4ee5\u4e3a\u662f\u5927\u4f6c\uff0c\u7ed3\u679c\u770b\u4f60\u540e\u9762\u56de\u590d\u539f\u6765\u662f\u6c11\u79d1 CPU \u4e13\u5bb6\u2026\u2026Intel \u67b6\u6784\u4e2d Cache Disable \u4e0d\u662f\u6307\u4ee4\u4e0a\u7684 flag\uff0c\u800c\u662f MMU \u8d1f\u8d23\u7684\u3002\u800c\u4e14 x86 \u67b6\u6784\u6ca1\u6709\u529e\u6cd5\u5bf9 Cache \u76f4\u63a5\u5bfb\u5740\uff0c\u6240\u4ee5\u4f60\u8bf4\u7684\u5f53 RAM \u7528\u4e0d\u53ef\u80fd\u3002\u4e0d\u8fc7\u9664 x86 \u4ee5\u5916\u662f\u6709\u7c7b\u4f3c\u7528\u6cd5\u7684\uff0c\u6bd4\u5982 ARM \u7684 TCM\uff0c\u5c31\u662f\u53ef\u4ee5\u76f4\u63a5\u5bfb\u5740\u7684 SRAM \u7f13\u5b58 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : reus <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @vcfghtyjc \u4f60\u8981\u7684\u4e0d\u662f\u7981\u7528\u7f13\u5b58\uff0c\u662f\u6bcf\u6b21\u8fd0\u884c\u4ee3\u7801\u524d flush \u7f13\u5b58\uff1a https:\/\/stackoverflow.com\/questions\/1756825\/how-can-i-do-a-cpu-cache-flush-in-x86-windows \u3002\u4e0d\u7528\u91cd\u542f\u2026\u2026 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : realpg <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @vcfghtyjc #54
    \u8fd9\u4e9b\u7ec6\u8282\u6211\u4e0d\u4e86\u89e3 \u57fa\u672c\u6211\u8fd9\u8fb9\u7684\u76f8\u5173\u7ecf\u5386\u90fd\u662f 10 \u5e74\u4ee5\u524d \u4e00\u4e2a\u6d89\u53ca intel cpu \u7684 cache \u7684\u786c bug \u8c03\u8bd5 \u6211\u4eec\u8fd0\u7ef4\u7684\u7a0b\u5e8f \u5f53\u65f6\u8ddf intel \u7684\u4eba\u534f\u4f5c\u8fc7\u4e00\u9635\u5b50 \u5f53\u65f6\u4ed6\u4eec\u7ed9\u7c97\u7565\u7684\u8bb2\u8fc7 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : vcfghtyjc <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @vk42 \u6211\u5230\u4e0d\u7528\u628a cache \u5f53 ram \u7528\u3002\u770b\u4e86\u8fd9\u4e48\u591a\uff0c\u5df2\u7ecf\u4e0d\u592a\u61c2 Intel \u7684 Cache Disable \u5230\u5e95\u505a\u4e86\u4ec0\u4e48\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : vcfghtyjc <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @reus \u56e0\u4e3a\u6211\u6d4b\u5f97\u662f\u7a0b\u5e8f\u7684\u4e00\u6bb5\u4ee3\u7801\u5757\u7684\u8fd0\u884c\u65f6\u95f4\uff0c\u662f\u5426\u6709\u5728\u8fd0\u884c\u4e2d flush cache \u7684\u6307\u4ee4\uff1f\u8fd8\u662f\u8bf4\u6211\u5e94\u8be5\u628a\u8fd9\u6bb5\u4ee3\u7801\u5757\u6458\u51fa\u6765\uff0c\u7136\u540e\u91cd\u590d\u8fd0\u884c\u591a\u6b21\uff1f <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : vcfghtyjc <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @realpg \u597d\u7684\uff0c\u8c22\u8c22\uff01 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : vk42 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @vcfghtyjc
    Cache Disable \u7684\u884c\u4e3a\u662f\u5f88\u786e\u5b9a\u7684\uff0c\u5728 Intel Manual \u91cc\u9762\u5199\u7684\u4e5f\u5f88\u6e05\u695a\uff0c\u4e0d\u7528\u7ba1 @realpg \u6545\u5f04\u7384\u865a\u3002
    \u5173\u952e\u95ee\u9898\u662f\u5927\u5bb6\u5bf9\u4f60\u5173 Cache \u6765\u505a profiling \u7684\u9700\u6c42\u6709\u8d28\u7591\uff0c\u4e0d\u77e5\u9053\u4f60\u662f\u4e0d\u662f\u5df2\u7ecf\u7528\u8fc7 perf \u4e4b\u7c7b\u7684\u5de5\u5177\u6d4b\u8bd5\u8fc7\uff0c\u4e3a\u4ec0\u4e48\u4e00\u4e0a\u6765\u5c31\u5173 cache \u4e0d\u592a\u80fd\u7406\u89e3\u2026\u2026 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : reus <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u6839\u636e#45 \u7684\u8865\u5145\uff0c\u4e3b\u662f\u60f3\u5728\u591a\u6b21\u8fd0\u884c\u540c\u4e00\u6bb5\u7a0b\u5e8f\u65f6\uff0c\u6d88\u9664\u7f13\u5b58\u5e26\u6765\u7684\u6296\u52a8
    \u4e3b\u60f3\u51fa\u7684\u529e\u6cd5\u662f\u5173\u95ed cpu \u7f13\u5b58\uff0c\u4f46\u8fd9\u4e2a\u5b9e\u9645\u662f\u504f\u79bb\u4e86\u539f\u672c\u7684\u95ee\u9898
    \u539f\u672c\u7684\u95ee\u9898\uff0c\u641c x86 performance benchmark flush cache \u4f1a\u6709\u7b54\u6848<\/p>\n

    \u62ff\u7740\u5341\u5e74\u524d\u7684\u534a\u6876\u6c34\u77e5\u8bc6\u5c31\u6765\u6307\u70b9\u6c5f\u5c71\uff0c\u5475\u5475
    \u662f\uff0c\u5168\u4e16\u754c\u5c31\u4f60\u77e5\u9053 cpu \u6709 bug\uff0c\u8fd9\u4e24\u5e74\u7684\u4ec0\u4e48 meltdown \u3001\u4ec0\u4e48 specture\uff0c\u73b0\u4ee3\u7684\u5e74\u8f7b\u4eba\u90fd\u4e00\u65e0\u6240\u77e5\u7684\uff01
    \u6076\u81ed\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : vcfghtyjc <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @reus \u8c22\u8c22\u63d0\u4f9b\u7684\u4fe1\u606f\uff0c\u6d88\u6d88\u6c14\u54c8\u3002(>\u25bd<)<\/p>\n

    \u6211\u641c\u4e86\u4e00\u4e0b\uff0c\u770b\u5230\u4e86\u4e00\u7bc7\u5728 stack overflow \u7684\u5e16\u5b50<\/p>\n

    https:\/\/stackoverflow.com\/questions\/48527189\/is-there-a-way-to-flush-the-entire-cpu-cache-related-to-a-program<\/p>\n

    \u60a8\u6307\u7684\u662f\u8fd9\u4e2a\u5417\uff1f\u8fd8\u662f\u6709\u66f4\u597d\u7684\u8d44\u6599\u5462\uff1f <\/p><\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : vcfghtyjc <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @vk42 \u786e\u5b9e\u4e0d\u662f\u5f88\u719f\u6089\u8fd9\u4e00\u9886\u57df\uff0c\u6709\u4ec0\u4e48\u597d\u7528\u7684\u5de5\u5177\u53ef\u4ee5\u63a8\u8350\u63a8\u8350\u5417\uff1f <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : reus <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @vcfghtyjc \u6700\u7b80\u5355\u7684\uff0c\u8dd1\u5b8c\u4e00\u6b21\uff0c\u53bb\u8bfb\u4e00\u4e0b\u5176\u4ed6\u5730\u65b9\u7684\u6ca1\u7528\u5185\u5b58\uff0c\u8ba9 cpu \u7f13\u5b58\u586b\u6ee1\u8fd9\u4e9b\u6ca1\u7528\u7684\u6570\u636e\uff0c\u7136\u540e\u518d\u7ee7\u7eed\u4e0b\u4e00\u6b21\uff0c\u8fd9\u6837\u53ef\u4ee5\u4fdd\u8bc1 cpu \u4e0d\u4f1a\u547d\u4e2d\u4e0a\u4e00\u6b21\u7559\u4e0b\u7684\u3002\u770b\u4f60 cpu \u7684 L3 \u591a\u5927\uff0c\u8bfb\u4e2a\u51e0\u5146\u51e0\u5341\u5146\u5e94\u8be5\u5c31\u80fd\u586b\u6ee1\u3002
    \u4f8b\u5982\u4e00\u5f00\u59cb\u5c31 malloc \u4e00\u5757\uff0c\u7136\u540e\u6d4b\u8bd5\u5b8c\u4e00\u6b21\uff0cmemcpy \u8fd9\u5757\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : vk42 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @vcfghtyjc perf \u662f\u6bd4\u8f83\u5e38\u7528\u7684\uff0c\u800c\u4e14\u6bd4\u8f83\u65b9\u4fbf\uff0c\u968f\u624b perf stat \u8dd1\u4e00\u4e0b\u5c31\u80fd\u5f97\u5230\u5927\u6982\u7684\u6570\u636e\uff0c\u4e0d\u8fc7\u8fd9\u4e2a\u4f9d\u8d56\u4f60\u7684 CPU \u96c6\u6210\u7684 PMC \u6709\u54ea\u4e9b\u3002\u5982\u679c\u4e0a\u725b\u5200\u7684\u8bdd Intel \u7684 U \u6709\u81ea\u5bb6\u7684 VTune\uff0cAMD \u5e94\u8be5\u4e5f\u6709\u7c7b\u4f3c\u7684\u5546\u4e1a\u5de5\u5177\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : helloworld000 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @vcfghtyjc \u65f6\u95f4\u592a\u4e45\u5177\u4f53\u8bb0\u4e0d\u6e05\u4e86, \u6211\u8bb0\u5f97\u662f\u533a\u522b\u4e0d\u662f\u5f88\u5927….\u5176\u5b9e\u8fd9\u73a9\u610f\u5f88\u770b\u4f60 use case<\/p>\n

    \u5982\u679c\u662f\u51e0 ms \u7ea7\u522b\u7684 latency \u4f1a\u6709\u660e\u663e\u533a\u522b, \u4e0d\u7136\u6ca1\u4ec0\u4e48\u610f\u4e49 <\/p><\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : reus <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @vcfghtyjc \u4f60\u7ed9\u7684\u94fe\u63a5\u91cc\u9762\uff0c\u5c31\u63d0\u5230\u4e00\u4e2a\u529e\u6cd5\u662f touching a lot of memory\uff0c\u8fd9\u4e2a\u5e94\u8be5\u662f\u6700\u7b80\u4fbf\u7684\u4e86\uff0c\u90fd\u4e0d\u9700\u8981\u4ec0\u4e48\u7279\u6743\u6307\u4ee4\u3002\u4f46\u662f\u8fd9\u4e2a\u4f3c\u4e4e\u4e5f\u4e0d\u5b8c\u5168\u53ef\u9760\uff0c\u56e0\u4e3a\u64cd\u4f5c\u7cfb\u7edf\u53ef\u80fd\u4f1a\u5c06\u8fdb\u7a0b\u8c03\u5ea6\u5230\u53e6\u4e00\u4e2a cpu\uff0c\u8fd9\u6837\u5c31\u767d\u586b\u4e86\u3002\u53ef\u80fd\u8bbe\u4e00\u4e0b cpu affinity \u4f1a\u51cf\u5c11\u8fd9\u7c7b\u8c03\u5ea6\u3002
    \u5176\u5b9e\uff0c\u6211\u611f\u89c9\u8fd9\u4e2a\u4e5f\u4e0d\u662f\u6700\u521d\u7684\u95ee\u9898\u3002\u4f60\u8bf4\u7684\u201c\u8fd0\u884c\u591a\u6b21\u201d\uff0c\u7a76\u7adf\u662f\u591a\u5c11\u6b21\uff1f\u6211\u89c9\u5f97\uff0c\u53ea\u8981\u8fd0\u884c\u8db3\u591f\u591a\uff0c\u4f8b\u5982\u51e0\u5341\u4e07\u4e0a\u767e\u4e07\u6b21\uff0c\u7f13\u5b58\u5e26\u6765\u7684\u6296\u52a8\uff0c\u5c31\u4f1a\u88ab\u7a00\u91ca\uff0c\u4f3c\u4e4e\u4e0d\u9700\u8981\u523b\u610f\u6d88\u9664\u3002\u5982\u679c\u53ea\u662f\u8dd1\u4e86\u51e0\u6b21\u51e0\u5341\u6b21\uff0c\u90a3\u6296\u52a8\u5c31\u53ef\u80fd\u663e\u8457\u4e86\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : vcfghtyjc <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @reus \u8fd0\u884c\u4e0a\u767e\u4e07\u6b21\uff0c\u6211\u60f3\u8981\u7814\u7a76\u7684\u662f\u5e26\u6765\u6296\u52a8\u7684\u56e0\u7d20\uff0c\u6240\u4ee5\u60f3\u5148\u6392\u9664 locality \u5e26\u6765\u7684\u6296\u52a8\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : vcfghtyjc <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @helloworld000 \u76ee\u524d\u6807\u51c6\u5dee\u5927\u6982\u5728 1000 ns \u5de6\u53f3\uff0c\u4e0d\u8fc7\u6211\u662f\u60f3\u8ba1\u7b97\u7684\u662f\u7a0b\u5e8f\u91cc\u4e00\u6bb5\u4ee3\u7801\u7684\u8fd0\u884c\u65f6\u95f4\uff0c\u8fd9\u6bb5\u4ee3\u7801\u4f1a\u88ab\u6267\u884c\u6570\u767e\u4e07\u6b21\uff0c\u53ef\u80fd\u91cd\u542f\u4e0d\u80fd\u89e3\u51b3\u6211\u7684\u95ee\u9898\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : reus <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @vcfghtyjc \u90a3\u4f60\u53ea\u8981\u7cbe\u7ec6\u5206\u914d\u597d\u6bcf\u6b21\u7528\u5230\u7684\u5185\u5b58\uff0c\u4fdd\u8bc1\u5404\u6b21\u4e0d\u51fa\u73b0\u5171\u7528 cache line \u7684\u60c5\u51b5\u5c31\u884c\u4e86\uff0clocality \u81ea\u7136\u4e0d\u751f\u6548\u3002\u5c31\u4e0d\u77e5\u9053\u4f60\u7684\u7a0b\u5e8f\u80fd\u4e0d\u80fd\u5b8c\u5168\u81ea\u5df1\u63a7\u5236\u5206\u914d\u4e86\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : reus <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @vcfghtyjc \u573a\u666f\u5c31\u662f\u7c7b\u4f3c\u907f\u514d false sharing\uff0c\u4f46\u4f60\u8fd9\u91cc\u4e0d\u662f\u591a\u4e2a\u7ebf\u7a0b\u5171\u7528 cache line \u7684\u95ee\u9898\uff0c\u800c\u662f\u591a\u6b21\u8fd0\u884c\u5171\u7528 cache line \u7684\u95ee\u9898\u3002\u800c\u4e14\u6d89\u53ca\u7684\u662f\u4e00\u6b21\u8fd0\u884c\u7528\u5230\u7684\u5168\u90e8\u5185\u5b58\uff0c\u4e0d\u80fd\u548c\u53e6\u4e00\u6b21\u6709\u4efb\u4f55\u5171\u4eab cache line \u3002\u6211\u60f3\u5230\u7684\u662f\u63d0\u524d\u5206\u914d\u597d\u5404\u6b21\u9700\u8981\u7528\u5230\u7684\u5185\u5b58\uff0c\u7136\u540e\u518d\u5f00\u59cb\u8dd1\u3002\u5185\u5b58\u5206\u914d\u5668\u53ef\u80fd\u8981\u81ea\u5df1\u5199\uff0c\u56e0\u4e3a\u4e00\u822c\u7684\u5185\u5b58\u5206\u914d\u5668\u90fd\u662f\u5c3d\u91cf\u5229\u7528 cache locality\uff0c\u548c\u4f60\u7684\u76ee\u7684\u5b8c\u5168\u76f8\u53cd\u2026\u2026 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : zxdhuge <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u5176\u5b9e\u6211\u8fd8\u633a\u597d\u5947\uff0c\u5bf9\u4e8e multi core \u7684 CPU\uff0c\u5404\u4e2a core \u4e4b\u95f4\u7684 cache \u662f\u5982\u4f55 synchronize \u7684\uff0c\u6bd5\u7adf process \u53ef\u80fd\u4e00\u4f1a\u5728\u8fd9\u4e2a core\uff0c\u8fc7\u4e00\u4f1a\u88ab\u5206\u5230\u4e86\u53e6\u4e00\u4e2a core <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : dartabe <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u5e94\u8be5\u662f\u7f13\u5b58\u547d\u4e2d\u7684\u95ee\u9898\u5e26\u6765\u7684\u6296\u52a8? \u73b0\u5728 x86 \u8fd8\u6709\u5bc4\u5b58\u5668\u76f4\u8fde\u5916\u90e8 dram \u7684\u5417\uff1f \u5e94\u8be5\u90fd\u662f\u8981\u7ecf\u8fc7 cpu \u7f13\u5b58\u5427 1 \u7ea7 2 \u7ea7 3 \u7ea7 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : tianshilei1992 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @zxdhuge \u6240\u4ee5 false sharing \u5c31\u6765\u4e86\u2026 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : vcfghtyjc <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @reus \u611f\u89c9\u8fd9\u4e2a\u5de5\u7a0b\u91cf\u6709\u70b9\u5927\uff0c\u662f\u4e0d\u662f\u53ea\u6709 C \u8bed\u8a00\u7a0b\u5e8f\u505a\u7684\u5230\uff1f <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : nifury <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @vcfghtyjc #70 \u76f4\u89c9\u4e0a 1000ns \u7684\u6807\u51c6\u5dee\u2026\u2026\u6709\u6ca1\u6709\u53ef\u80fd\u662f\u7cfb\u7edf\u8c03\u5ea6\u5bfc\u81f4\u7684\u5462\uff1f
    \u611f\u89c9 OS \u7684\u5f71\u54cd\u6bd4 cache \u5927\u5f97\u591a\u5427\uff1f <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : ryd994 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @zxdhuge \u64cd\u4f5c\u7cfb\u7edf\u8fdb\u7a0b\u8c03\u5ea6\u9891\u7387\u76f8\u5bf9\u7f13\u5b58\u547d\u4e2d\u6765\u8bf4\u5df2\u7ecf\u5f88\u4f4e\u4e86\u3002\u800c\u4e14\u4e00\u822c\u4f1a\u5c3d\u91cf\u907f\u514d\u5728\u4e24\u4e2a\u6838\u4e4b\u95f4\u6765\u56de\u8c03\u5ea6\u3002
    \u4f46\u662f\u5982\u679c\u4f60\u81ea\u5df1\u7684\u591a\u7ebf\u7a0b\u7a0b\u5e8f\u5199\u7684\u4e0d\u597d\uff0c\u90a3\u53c8\u662f\u53e6\u4e00\u56de\u4e8b\u4e86\u3002
    \u518d\u8bf4\u4e86\uff0cL3 \u5171\u7528\u3002\u9664\u975e\u4e24\u4e2a\u6838\u4e92\u76f8 false sharing\uff0c\u5426\u5219\u540c\u4e00\u4e2a\u7ebf\u7a0b\u5076\u5c14\u6362\u4e00\u4e0b\u65e0\u6240\u8c13\u7684\u3002<\/p>\n

    @vcfghtyjc \u4f60\u5148\u8003\u8651\u8c03\u5ea6\u7684\u6296\u52a8\u5427\u3002\u8fd8\u6709\u5404\u79cd\u8bbe\u5907\u7684\u4e2d\u65ad\u3002\u8d85\u7b97\u6240\u4ee5\u7528\u7684\u90fd\u662f\u9b54\u6539\u7248 Linux \u3002\u6240\u6709\u7cfb\u7edf\u529f\u80fd\u80fd\u5173\u7684\u90fd\u5173\u6389\u3002\u57fa\u672c\u4e0a\u5c31\u662f\u53ea\u7559\u4e2a\u5185\u5b58\u7ba1\u7406<\/p>\n

    @reus #71 \u8fd9\u4e0d\u53eb false sharing\uff0c\u56e0\u4e3a\u786e\u5b9e\u662f by design \u5728 share \u3002\u89e3\u51b3\u529e\u6cd5\u5f88\u7b80\u5355\uff1a\u4e0d\u8981\u91ca\u653e\u4e0a\u4e00\u6b21\u4f7f\u7528\u7684\u5185\u5b58\u5c31\u597d\u3002\u53c8\u6216\u8005\u6bcf\u6b21\u4f7f\u7528\u524d\u4fdd\u8bc1\u521d\u59cb\u5316\u5185\u5b58\u3002\u4fdd\u8bc1\u5185\u5b58\u5728\u7f13\u5b58\u91cc\u6bd4\u4fdd\u8bc1\u5185\u5b58\u4e0d\u5728\u7f13\u5b58\u91cc\u7b80\u5355\u3002 <\/p><\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : ryd994 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @vcfghtyjc #45
    \u4f60\u751a\u81f3\u53ef\u4ee5\u52a0\u4e00\u4e2a\u6363\u4e71\u7528\u7684\u7ebf\u7a0b\u4e13\u95e8\u628a\u522b\u7684\u7ebf\u7a0b\u7684\u5185\u5b58 invalidate \u6389….. <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : vcfghtyjc <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @ryd994 \u8c03\u5ea6\u7684\u6296\u52a8\uff0c\u80fd\u5c55\u5f00\u8bb2\u4e00\u4e0b\u5417\uff1f\u8fd9\u4e9b\u53ea\u4fdd\u7559\u5185\u5b58\u7ba1\u7406\u7684\u9b54\u6539 Linux \u6709\u5f00\u6e90\u7684\u5417\uff1f <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : ryd994 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @vcfghtyjc \u6bd4\u5982\u7f51\u7edc\u4e2d\u65ad\uff0c\u5b9a\u65f6\u5668\u4e2d\u65ad\uff0c\u8fd9\u4e9b\u90fd\u5f88\u5e38\u89c1\u3002\u56e0\u4e3a\u7528\u6237\u6001\u5176\u5b9e\u4f18\u5148\u7ea7\u5f88\u4f4e\u7684\uff0c\u5404\u79cd\u4e2d\u65ad\u548c\u5185\u6838\u7ebf\u7a0b\u90fd\u53ef\u4ee5\u62a2\u5360\u3002
    \u5982\u679c\u7ebf\u7a0b\u6570\u91cf\u5c11\u4e0e\u53ef\u7528\u7684\u6838\u6570\u91cf\u7684\u8bdd\u64cd\u4f5c\u7cfb\u7edf\u4e00\u822c\u4e0d\u4f1a\u968f\u4fbf\u628a\u4f60\u7684\u8fdb\u7a0b\u8c03\u5ea6\u5230\u5176\u4ed6\u6838\u4e0a\u3002\u4f46\u662f\u64cd\u4f5c\u7cfb\u7edf\u540e\u53f0\u5176\u5b9e\u8981\u5e72\u5f88\u591a\u7ef4\u62a4\u6027\u7684\u5de5\u4f5c\u3002\u53c8\u6216\u8005\u4f60\u867d\u7136\u6ca1\u6709\u7528\u8fd9\u4e2a\u529f\u80fd\uff0c\u4f46\u64cd\u4f5c\u7cfb\u7edf\u8fd8\u662f\u9ed8\u8ba4\u5728\u5904\u7406\u76f8\u5173\u7684\u903b\u8f91\u3002\u6bd4\u5982\u684c\u9762\u5e73\u53f0\u4e3a\u4e86\u4fdd\u8bc1\u7528\u6237\u4f53\u9a8c\uff0c\u4e00\u822c\u4f1a\u628a\u7cfb\u7edf\u5b9a\u65f6\u5668\u7684\u9891\u7387\u8bbe\u5f97\u6bd4\u8f83\u9ad8\u3002<\/p>\n

    \u5177\u4f53\u53ef\u4ee5\u770b IBM \u5728\u8d85\u7b97\u4e0a os jitter \u76f8\u5173\u7684\u8bba\u6587\u3002 <\/p><\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : vcfghtyjc <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @ryd994 \u56e0\u4e3a\u6211\u7a0b\u5e8f\u662f\u5728\u5355\u673a\u4e0a\u8fd0\u884c\u7684\uff0c\u5e94\u8be5\u4e0d\u592a\u5b58\u5728\u7f51\u7edc\u4e2d\u65ad\uff0c\u76ee\u524d\u90fd\u662f\u5355\u7ebf\u7a0b\uff0ccpu \u6570\u91cf\u80af\u5b9a\u662f\u8db3\u591f OS \u505a\u7ef4\u62a4\u7684\uff0c\u4e0d\u77e5\u9053\u4f1a\u4e0d\u4f1a\u662f\u5b9a\u65f6\u5668\u4e2d\u65ad\u3002<\/p>\n

    HPC \u4e0a\u7684 jitter \u548c\u666e\u901a\u670d\u52a1\u5668 server \u5e94\u8be5\u8fd8\u662f\u6709\u70b9\u4e0d\u540c\u7684\u5427\u3002\u56e0\u4e3a\u8fd0\u884c\u5728 HPC \u4e0a\u7684\u7a0b\u5e8f\u5927\u591a\u4f9d\u8d56 MPI \u505a\u5e76\u884c\u8ba1\u7b97\uff0c\u7f51\u7edc\u5e94\u8be5\u662f\u4e3b\u8981\u7684 jitter \u6765\u6e90\uff0c\u4e0d\u8fc7\u4e5f\u8bb8\u53ef\u4ee5\u770b\u770b\u5bf9\u4e8e\u5355\u4e2a server \u7684 os jitter \u5417\uff1f \u6709\u4ec0\u4e48\u63a8\u8350\u7684\u5173\u952e\u8bcd\u5417\uff1f<\/p>\n

    \u5982\u679c\u6211\u60f3\u5c3d\u91cf\u907f\u514d OS \u5e26\u6765\u7684\u5f71\u54cd\uff0c\u76ee\u524d\u6700\u8f7b\u7684 Linux \u53d1\u884c\u7248\u662f\u4ec0\u4e48\uff1f <\/p><\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : ryd994 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @vcfghtyjc \u5c31\u662f\u6211\u4e0a\u9762\u8bf4\u7684\u3002\u5c31\u7b97\u4f60\u4e0d\u7528\uff0c\u64cd\u4f5c\u7cfb\u7edf\u7f16\u8bd1\u65f6\u6709\u76f8\u5e94\u7684\u652f\u6301\uff0c\u5c31\u53ef\u80fd\u6709\u76f8\u5173\u7684\u540e\u53f0\u52a8\u4f5c\uff0c\u6bd4\u5982\u53ef\u80fd\u65f6\u4e0d\u65f6\u7684\u8981\u53bb\u68c0\u67e5\u4e00\u4e0b\u7f51\u5361\u3002
    hpc \u4e0a\u5355\u673a\u7684 jitter \u4f1a\u62d6\u6162\u6574\u4e2a\u96c6\u7fa4\uff0c\u56e0\u4e3a\u5927\u5bb6\u90fd\u5728\u7b49\u6700\u6162\u7684\u90a3\u4e2a\u540c\u6b65\u3002\u8282\u70b9\u6570\u91cf\u591a\u4e86\u4ee5\u540e\uff0c\u5c0f\u6982\u7387\u4e5f\u53d8\u6210\u5927\u6982\u7387\uff0c\u81f3\u5c11\u6709\u4e00\u4e2a\u8282\u70b9\u662f\u6162\u7684\u3002\u4e8e\u662f\u6574\u4e2a\u96c6\u7fa4\u5c31\u5e9f\u4e86\u3002
    \u4f60\u73b0\u5728\u5c31\u6709\u53ef\u80fd\u662f jitter \u7684\u5f71\u54cd\uff0c\u53ea\u4e0d\u8fc7\u5355\u673a\u5f71\u54cd\u6ca1\u90a3\u4e48\u5927\u800c\u5df2\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : reus <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @ryd994 \u6211\u6ca1\u8bf4\u8fd9\u53eb false sharing\uff0c\u6211\u8bf4\u7684\u662f\u201c\u7c7b\u4f3c\u907f\u514d false sharing\u201d\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : reus <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @vcfghtyjc \u4efb\u4f55\u53ef\u4ee5\u624b\u5de5\u63a7\u5236\u5185\u5b58\u5206\u914d\u7684\u8bed\u8a00\u90fd\u53ef\u4ee5\u3002\u4f60\u5c45\u7136\u4e0d\u662f\u7528 C \uff1f <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : hailinzeng <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    ![different levels of approx. access times]( https:\/\/i.stack.imgur.com\/xVhVi.png) <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : reus <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @vcfghtyjc linux \u5185\u6838\u672c\u8eab\u5c31\u6709\u5b9e\u65f6\u9009\u9879\uff0c\u76f4\u63a5\u7f16\u8bd1\u5373\u53ef\uff0c\u4e0d\u7528\u9b54\u6539\u3002\u4f46\u662f\u5177\u4f53\u80fd\u505a\u5230\u591a\u5b9e\u65f6\uff0c\u5bf9\u4f60\u7684\u573a\u666f\u6709\u6ca1\u6709\u5f71\u54cd\uff0c\u8fd8\u8981\u5177\u4f53\u8bd5\u8fc7\u624d\u77e5\u9053\u3002
    \u6211\u5f88\u597d\u5947\u4e3a\u5565\u4f60\u8981\u505a\u8fd9\u79cd\u7a0b\u5ea6\u7684\u6d4b\u91cf\uff0c\u5374\u53c8\u4e0d\u7528 C \u7c7b\u53ef\u4ee5\u7cbe\u7ec6\u63a7\u5236\u5185\u5b58\u7684\u8bed\u8a00\uff1f <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : hailinzeng <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    L1\/2 Cache 1ns
    L3 Cache 10ns
    Main Memory 100ns
    SATA SSDs 100,000ns
    HDD 5,000,000ns<\/p>\n

    https:\/\/stackoverflow.com\/a\/42435902 <\/p><\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : vcfghtyjc <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @reus \u88ab\u5206\u6790\u7684\u7a0b\u5e8f\u662f Golang \u5199\u7684 [\u6342\u8138] <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : vcfghtyjc <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @ryd994 ok\uff0c\u591a\u8c22\uff0c\u6211\u7167\u8fd9\u4e2a\u601d\u8def\u53bb\u627e\u627e\u8bba\u6587\uff0c\u770b\u770b\u6709\u6ca1\u6709\u5bf9\u5355\u673a\u91cc jitter \u56e0\u7d20\u7684\u5206\u6790 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : dalabenba <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @vcfghtyjc \u6211\u89c9\u5f97\u8fd9\u4e2a\u5728\u8003\u8651\u5230 cache \u4e4b\u524d\u5e94\u8be5\u5148\u8003\u8651\u4e0b io \uff08\u6bd4\u5982\u8bfb\u53d6\u7a0b\u5e8f\u7684 pagecache \uff09\u9020\u6210\u7684\u5dee\u5f02\uff0c\u4f60\u53ef\u4ee5\u6bcf\u6b21 bench \u65f6\u5019\u6253\u4e00\u4e0b\u706b\u7130\u56fe\uff0c\u5b9a\u4f4d\u4e0b\u51fd\u6570\u7684\u5dee\u5f02 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : peihanw <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u7cfb\u7edf BIOS \u91cc\u53ef\u4ee5\u7981\u7528\u201cDRAM Prefetch\u201d\u3001\u201cCPU Core Hardware Prefetcher\u201d\u3001\u201cCPU Cache Stride Prefetcher\u201d\uff08\u4e0d\u540c\u4e3b\u677f BIOS \u8bbe\u7f6e\u53ef\u80fd\u6709\u4e9b\u5dee\u5f02\uff09\uff0c\u4e3b\u53ef\u4ee5\u5206\u522b \/\u7ec4\u5408\u8bd5\u8bd5\u3002\u5bf9\u7279\u5b9a\u7a0b\u5e8f(xmrig \u90a3\u7c7b\u4f60\u61c2\u7684)\u6027\u80fd\u4f1a\u6709\u6240\u63d0\u5347\u3002\u865a\u62df\u673a \/\u4e91\u4e3b\u673a\u90fd\u4e0d\u884c\u7684\uff0c\u53ea\u80fd\u7269\u7406\u673a\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : reus <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @vcfghtyjc \u90a3\u6ca1\u610f\u4e49\uff0cgo \u8fd0\u884c\u65f6\u672c\u8eab\u5c31\u505a\u4e86\u5f88\u591a\u4e8b\u60c5\uff0cgc\uff0c\u8c03\u5ea6\u90fd\u4f1a\u5e26\u6765\u989d\u5916\u7684\u5ef6\u8fdf\u548c\u6296\u52a8\uff0c\u6839\u672c\u8f6e\u4e0d\u5230\u64cd\u4f5c\u7cfb\u7edf\u751a\u81f3 cpu \u5c42\u9762\u3002\u5efa\u8bae\u653e\u5f03\u8fd9\u4e2a\u65b9\u5411\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : Aalen <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    hmmm \u4ee5\u524d\u5728 bios \u80fd\u5173\u7f13\u5b58\uff0c\u4f9d\u7a00\u8bb0\u5f97\u6211\u4e4b\u524d\u6709\u4e00\u5757\u5954\u817e 4\uff0c\u5c31\u662f\u4e8c\u7ea7\u7f13\u5b58\u574f\u4e86\uff0cbios \u5173\u6389 cache \u53ef\u4ee5\u7528\uff0c\u6253\u5f00 cache Windows \u84dd\u5c4f <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : vcfghtyjc <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @reus \u4f46\u662f\u6211\u7528 KNN \u786e\u5b9e\u89c1\u5230\u4e86\u5206\u5c42\uff0c\u73b0\u5728\u4e0d\u662f\u5f88\u786e\u5b9a\u662f\u5426\u56e0\u4e3a locality \u3002\u662f\u5426\u6709\u529e\u6cd5\u53ef\u4ee5\u68c0\u6d4b Golang \u5e26\u6765\u7684\u6296\u52a8\uff1f <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : reus <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @vcfghtyjc
    https:\/\/blog.gopheracademy.com\/advent-2017\/go-execution-tracer\/
    https:\/\/about.sourcegraph.com\/go\/an-introduction-to-go-tool-trace-rhys-hiltner <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : vcfghtyjc <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @dalabenba \u6bcf\u6b21\u6d4b\u7684\u90fd\u662f\u540c\u4e00\u4e2a function\uff0c\u7a0b\u5e8f\u672c\u8eab\u5e76\u4e0d\u5927\uff0c\u5e94\u8be5\u4e0d\u4f1a\u56e0\u4e3a disk IO \u5e26\u6765\u5dee\u5f02\u5427\uff1f\u8fd8\u662f\u8bf4\u6211\u5bf9 IO \u7684\u7406\u89e3\u6709\u95ee\u9898\uff1f <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : vcfghtyjc <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @reus \u591a\u8c22\uff0c\u6211\u8bd5\u8bd5\u770b\uff0c\u770b\u770b\u80fd\u4e0d\u80fd\u5206\u79bb\u51fa\u7531\u8bed\u8a00\u5e26\u6765\u7684\u6296\u52a8\u5427\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : jsteward <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @imbushuo datapath \u548c\u5c0d\u61c9\u7684 latency \u90fd\u5728\uff0c\u4e0d\u904e cacheline \u4e0d\u6703 refill\uff0c\u4e5f\u5c31\u662f\u6bcf\u6b21\u90fd miss\uff0c\u6548\u679c\u4e0a\u9664\u4e86\u6703\u6bd4 dedicated datapath \u7a0d\u6162\uff0c\u8ddf\u6c92\u6709\u6c92\u6709\u5340\u5225\u5566\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : Gwzlchn <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u8fd9\u4e2a\u548c\u6211\u672c\u79d1\u6bd5\u8bbe\u6709\u70b9\u50cf\uff0c\u6211\u5f53\u65f6\u6709\u4e00\u90e8\u5206\u5de5\u4f5c\u6d4b\u91cf\u7684\u662f\u6bcf\u6761\u6307\u4ee4\u5728\u592a\u6e56\u4e4b\u5149\u7684 CPU \u5468\u671f\u6570\u3002\u5f53\u7136\u6700\u540e\u6211\u4e5f\u6ca1\u505a\u660e\u767d\u5c31\u662f\u4e86\u3002<\/p>\n

    \u5148\u8bf4\u4e00\u4e0b\uff0c\u795e\u5a01\u5e73\u53f0\u662f\u4e24\u7ea7 cache\uff0cL1 \u5206 data cache \u548c ins cache \u3001L2 \u4e0d\u533a\u5206\u3002\u6307\u4ee4\u96c6\u5c31\u6709\u70b9\u50cf MIPS \uff08\u5b9e\u9645\u662f Alpha \u6307\u4ee4\u96c6\uff09
    \u8bbf\u5b58\u6307\u4ee4\u6bd4\u8f83\u7b80\u5355\u4e86\uff0c\u6211\u5f53\u65f6\u4e5f\u8003\u8651\u4e86 CPU cache \u7684\u95ee\u9898\uff0c\u90a3\u4f60\u4e24\u6761 load\/store \u6307\u4ee4\u4e4b\u95f4\u8bbf\u95ee\u6570\u636e\u7684\u8ddd\u79bb\u8981\u5927\u4e8e\u4e00\u6574\u4e2a L2 cache \u7684\u5927\u5c0f\u5c31\u53ef\u4ee5\u4e86\u3002
    \u6700\u5751\u7239\u7684\u662f add\/div \u4e4b\u7c7b\u7684\u8ba1\u7b97\u6307\u4ee4\uff0c\u8fd9\u4e2a\u6211\u73b0\u5728\u4e5f\u6ca1\u60f3\u51fa\u6765\u5e94\u8be5\u600e\u4e48\u51c6\u786e\u6d4b\u91cf\u51fa\u6765\uff0c\u56e0\u4e3a\u73b0\u5728\u7684\u9ad8\u7ea7\u5904\u7406\u5668\u90fd\u662f\u591a\u53d1\u5c04+\u591a\u7ea7\u6d41\u6c34\u7ebf\u7684\u3002\u4e24\u4e2a\u6307\u4ee4\u4e4b\u95f4\u5b9e\u9645\u4e0a\u5c31\u5dee\u4e00\u4e2a\u6700\u540e\u7684\u5199\u56de\u9636\u6bb5\u7684\u95f4\u9694\u3002<\/p>\n

    \u8fd9\u4e2a\u6d88\u9664\u6d41\u6c34\u7ebf+\u591a\u53d1\u5c04\u7684\u5f71\u54cd\u4e3b\u6709\u5565\u597d\u4e00\u70b9\u7684\u601d\u8def\u5417\uff1f <\/p><\/div>\n<\/p><\/div>\n<\/li>\n

  • \n","protected":false},"excerpt":{"rendered":"

    Linux \u4e0b\u5982\u4f55\u5173\u95ed CPU c…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[],"tags":[],"_links":{"self":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/138223"}],"collection":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=138223"}],"version-history":[{"count":0,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/138223\/revisions"}],"wp:attachment":[{"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=138223"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=138223"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=138223"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}