{"id":187806,"date":"2020-11-09T04:07:25","date_gmt":"2020-11-08T20:07:25","guid":{"rendered":"http:\/\/4563.org\/?p=187806"},"modified":"2020-11-09T04:07:25","modified_gmt":"2020-11-08T20:07:25","slug":"c-%e8%af%ad%e8%a8%80%e5%a4%9a%e8%bf%9b%e7%a8%8b-vs-%e5%a4%9a%e7%ba%bf%e7%a8%8b%e6%80%a7%e8%83%bd%e9%97%ae%e9%a2%98","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=187806","title":{"rendered":"C \u8bed\u8a00\u591a\u8fdb\u7a0b vs \u591a\u7ebf\u7a0b\u6027\u80fd\u95ee\u9898"},"content":{"rendered":"
\n
\n
\n

C \u8bed\u8a00\u591a\u8fdb\u7a0b vs \u591a\u7ebf\u7a0b\u6027\u80fd\u95ee\u9898 <\/h1>\n

<\/p>\n

\n
\u8cc7\u6df1\u5927\u4f6c : tom82232 <\/span> <\/i> 7<\/span> <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n
\u6d4b\u8bd5\u6e90\u7801\u5982\u4e0b\uff1a
#define _GNU_SOURCE
#include <sched.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <pthread.h>
#include <stdint.h>
#include <unistd.h>
#include <sys\/syscall.h>
#include <sys\/types.h>
#include <fcntl.h><\/p>\n

typedef struct __test{
uint64_t a;
uint64_t b;
uint64_t c;
uint64_t d;
uint64_t e;
}test_t;<\/p>\n

#define CPU_MAX 128
int cpuid[CPU_MAX];
test_t tdata[CPU_MAX];
int seq[CPU_MAX];
int thd_num = 1;
uint64_t prev[CPU_MAX];
uint64_t tmp[CPU_MAX];
int flag_stat = 0;<\/p>\n

static void
init(void)
{
for(int i = 0; i < CPU_MAX; i++) {
cpuid[i] = -1;
seq[i] = i;
tdata[i].e = 100;
tdata[i].a = 0;
tdata[i].b = 0;
tdata[i].c = 0;
tdata[i].d = 0;
prev[i] = 0;
}
}<\/p>\n

static int
parse_cpuid(const char *str)
{
char buf[256];
int flag_start = 0;
int thdnum = 0;
int len = strlen(str);
if(len > 255) {
memcpy(buf, str, 255);
buf[255] = 0;
}
else if(0 < len) {
strcpy(buf, str);
}
else return 0;<\/p>\n

for(int i = 0; i < 256; i++) {
if(buf[i] == ‘ ‘ || buf[i] == ‘t’ || buf[i] == ‘,’) buf[i] = 0;
}<\/p>\n

for(int i = 0; i < 256; i++) {
if(flag_start && 0 == buf[i]) flag_start = 0;
if(0 == flag_start && 0 != buf[i]) {
flag_start = 1;
cpuid[thdnum] = atoi(buf+i);
if(0 > cpuid[thdnum] || CPU_MAX <= cpuid[thdnum]) return -1;
thdnum++;
}
}<\/p>\n

return 0;
}
static int
parse_cmd(int argc, char **argv)
{
if(0 < argc) {
thd_num = atoi(argv[0]);
if(0 > thd_num) return -1;
argc–, argv++;
}<\/p>\n

if(0 < argc) {
return parse_cpuid(argv[0]);
}<\/p>\n

return 0;
}<\/p>\n

static void*
task_root(void *arg)
{
register int seq = *(int*)arg;
int cid = cpuid[seq];
cpu_set_t cpumask;
pid_t pid = syscall(__NR_gettid);<\/p>\n

if(0 <= cid && CPU_MAX > cid) {
\/\/\u7ed1\u5b9a CPUID
CPU_ZERO(&cpumask);
CPU_SET(cid, &cpumask);
sched_setaffinity(pid, sizeof(cpumask), &cpumask);
usleep(1000);
printf(“task[%d] run on cpuid=%dn”, seq, cid);
}
else {
printf(“task[%d] run on cpuid=auton”, seq);
}<\/p>\n

while(1) {
tdata[seq].a += 1;
tdata[seq].b += tdata[seq].e*8;
tdata[seq].c += 1;
tdata[seq].d += tdata[seq].e*8;
}<\/p>\n

return NULL;
}<\/p>\n

static void*
stat_root(void *arg)<\/p>\n

{
arg = arg;
uint64_t ttl;
uint64_t d10[CPU_MAX];<\/p>\n

while(1) {<\/p>\n

if(0 == flag_stat) {
usleep(1000);
}
else {
flag_stat = 0;
ttl = 0;
for(int i = 0; i < thd_num; i++) {
tmp[i] = tdata[i].a;
}<\/p>\n

for(int i = 0; i < thd_num; i++) {
tmp[i] = tdata[i].a;
d10[i] = tmp[i] – prev[i];
ttl += d10[i];
}<\/p>\n

printf(“nTotal do times: %lu(sec)n”, ttl\/10);
for(int i = 0; i < thd_num; i++) {
if(-1 == cpuid[i]) {
printf(“ttask[%d] cpu=auto do times: %lu(\/sec)n”, i, d10[i]\/10);
}
else {
printf(“ttask[%d] cpu=%d do times: %lu(\/sec)n”, i, cpuid[i], d10[i]\/10);
}<\/p>\n

prev[i] = tmp[i];
}
}
}<\/p>\n

return NULL;
}<\/p>\n

static void*
timer_root(void *arg)
{
arg = arg;
uint64_t ttl;
uint64_t d10[CPU_MAX];<\/p>\n

while(1) {
sleep(10);
flag_stat = 1;
}<\/p>\n

return NULL;
}<\/p>\n

static int
task_set(void)
{
pthread_t thdid;
for(int i = 0; i < thd_num; i++) {
pthread_create(&thdid, NULL, task_root, &seq[i]);
}<\/p>\n

pthread_create(&thdid, NULL, timer_root, NULL);
pthread_create(&thdid, NULL, stat_root, NULL);<\/p>\n

return 0;
}<\/p>\n

int main(int argc, char **argv)
{
\/\/program thread-num thread-cpu-seq
init();
argc–, argv++;
if(-1 == parse_cmd(argc, argv)) {
printf(“Input param errorn”);
exit(-1);
}<\/p>\n

task_set();<\/p>\n

while(1) {
sleep(1000);
}<\/p>\n

return 0;
}<\/p>\n

\u53cc CPU-4 \u6838-\u8d85\u7ebf\u7a0b Intel(R) Xeon(R) CPU E5620 @ 2.40GHz
\u903b\u8f91 CPU 0 8 2 10 4 12 6 14 1 9 3 11 5 13 7 15
pysical id 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0
core id 0 0 1 1 9 9 10 10 0 0 1 1 9 9 10 10
\u7cfb\u7edf\uff1acentos8<\/p>\n

\u6d4b\u8bd5\u7ebf\u7a0b\uff1a
\u5355\u7ebf\u7a0b\u7ed1\u5b9a 0 \u903b\u8f91 CPU \u6d4b\u8bd5\u7ed3\u679c\uff08\u6267\u884c\u7d2f\u52a0\u6b21\u6570\uff09 108363138 \uff08\u6b21 \/\u79d2\uff09
\u53cc\u7ebf\u7a0b\u7ed1\u5b9a 0,1 \u903b\u8f91 CPU \u6d4b\u8bd5\u7ed3\u679c\uff08\u6267\u884c\u7d2f\u52a0\u6b21\u6570\uff09 79961987 \uff08\u6b21 \/\u79d2\uff09
3 \u7ebf\u7a0b\u7ed1\u5b9a 0,1,2 \u903b\u8f91 CPU \u6d4b\u8bd5\u7ed3\u679c\uff08\u6267\u884c\u7d2f\u52a0\u6b21\u6570\uff09 108639280 \uff08\u6b21 \/\u79d2\uff09
4 \u7ebf\u7a0b\u7ed1\u5b9a 0,1,2,3 \u903b\u8f91 CPU \u6d4b\u8bd5\u7ed3\u679c\uff08\u6267\u884c\u7d2f\u52a0\u6b21\u6570\uff09 97511278 \uff08\u6b21 \/\u79d2\uff09
5 \u7ebf\u7a0b\u7ed1\u5b9a 0,1,2,3,4 \u903b\u8f91 CPU \u6d4b\u8bd5\u7ed3\u679c\uff08\u6267\u884c\u7d2f\u52a0\u6b21\u6570\uff09 115751101 \uff08\u6b21 \/\u79d2\uff09
6 \u7ebf\u7a0b\u7ed1\u5b9a 0,1,2,3,4,5 \u903b\u8f91 CPU \u6d4b\u8bd5\u7ed3\u679c\uff08\u6267\u884c\u7d2f\u52a0\u6b21\u6570\uff09 138198505 \uff08\u6b21 \/\u79d2\uff09
7 \u7ebf\u7a0b\u7ed1\u5b9a 0,1,2,3,4,5,6 \u903b\u8f91 CPU \u6d4b\u8bd5\u7ed3\u679c\uff08\u6267\u884c\u7d2f\u52a0\u6b21\u6570\uff09 129034696 \uff08\u6b21 \/\u79d2\uff09
8 \u7ebf\u7a0b\u7ed1\u5b9a 0,1,2,3,4,5,6,7 \u903b\u8f91 CPU \u6d4b\u8bd5\u7ed3\u679c\uff08\u6267\u884c\u7d2f\u52a0\u6b21\u6570\uff09 126871151 \uff08\u6b21 \/\u79d2\uff09
9 \u7ebf\u7a0b\u7ed1\u5b9a 0,1,2,3,4,5,6,7,8 \u903b\u8f91 CPU \u6d4b\u8bd5\u7ed3\u679c\uff08\u6267\u884c\u7d2f\u52a0\u6b21\u6570\uff09 157512706 \uff08\u6b21 \/\u79d2\uff09
10 \u7ebf\u7a0b\u7ed1\u5b9a 0,1,2,3,4,5,6,7,8,9 \u903b\u8f91 CPU \u6d4b\u8bd5\u7ed3\u679c\uff08\u6267\u884c\u7d2f\u52a0\u6b21\u6570\uff09 141989197 \uff08\u6b21 \/\u79d2\uff09
[\u7ed3\u8bba]
\u589e\u52a0\u7ebf\u7a0b\u6570\u91cf\u5e76\u6ca1\u6709\u60f3\u8c61\u4e2d\u7684\u589e\u52a0\u6027\u80fd\u3002
\u9884\u671f\u7684\u76ee\u6807\u5e94\u8be5\u662f\u589e\u52a0\u7ebf\u7a0b\u6570\uff08\u5728\u540c\u4e00\u4e2a CPU \u4e2d\u5206\u914d\u7ed9\u4e0d\u540c\u7684 CORE \u7684\u65f6\u5019\u6027\u80fd\u5e94\u8be5\u500d\u6570\u589e\u52a0\uff0c\u5b9e\u9645\u4e0a\u6ca1\u6709\uff09\uff0c\u548c\u9884\u671f\u7684\u76f8\u5dee\u5f88\u5927\u3002<\/p>\n

\u6d4b\u8bd5\u8fdb\u7a0b\uff1a
\u6bcf\u4e2a\u8fdb\u7a0b\u5f00\u59cb\u4e00\u4e2a\u7d2f\u52a0\u7edf\u8ba1\u7ebf\u7a0b
\u6d4b\u8bd5\u7ed3\u679c
\u8fdb\u7a0b 1 \u7ed1\u5b9a CPU0 \u6d4b\u8bd5\u7ed3\u679c\uff08\u6267\u884c\u7d2f\u52a0\u6b21\u6570\uff09 102847956 \uff08\u6b21 \/\u79d2\uff09
\u8fdb\u7a0b 2 \u7ed1\u5b9a CPU2 \u6d4b\u8bd5\u7ed3\u679c\uff08\u6267\u884c\u7d2f\u52a0\u6b21\u6570\uff09 102903297 \uff08\u6b21 \/\u79d2\uff09
\u8fdb\u7a0b 3 \u7ed1\u5b9a CPU4 \u6d4b\u8bd5\u7ed3\u679c\uff08\u6267\u884c\u7d2f\u52a0\u6b21\u6570\uff09 102909125 \uff08\u6b21 \/\u79d2\uff09
\u8fdb\u7a0b 4 \u7ed1\u5b9a CPU6 \u6d4b\u8bd5\u7ed3\u679c\uff08\u6267\u884c\u7d2f\u52a0\u6b21\u6570\uff09 102934502 \uff08\u6b21 \/\u79d2\uff09
\u8fdb\u7a0b 5 \u7ed1\u5b9a CPU3 \u6d4b\u8bd5\u7ed3\u679c\uff08\u6267\u884c\u7d2f\u52a0\u6b21\u6570\uff09 107560180 \uff08\u6b21 \/\u79d2\uff09
\u5047\u5982\u5f00\u4e00\u4e2a\u8fdb\u7a0b\uff0c\u7ed1\u5b9a CPU \u548c\u522b\u7684\u8fdb\u7a0b\u7ed1\u5b9a\u7684 CPU \u5728\u540c\u4e00\u4e2a CPU \u7684\u540c\u4e00\u4e2a CORE \u4e0b\u7684\u8bdd\uff0c\u6027\u80fd\u4f1a\u53d8\u6210\u4e00\u534a\uff0c\u4e24\u4e2a\u8fdb\u7a0b\u52a0\u8d77\u6765\u548c\u5355\u72ec\u53ea\u5f00\u4e00\u4e2a\u8fdb\u7a0b\u7684\u65f6\u5019\u5dee\u4e0d\u591a\uff0c
[\u7ed3\u8bba]
\u5f00\u8fdb\u7a0b\u5904\u7406\u6570\u636e\u6ca1\u6709\u76f8\u4e92\u5f71\u54cd\uff0c\u548c\u9884\u671f\u7684\u4e00\u6837\uff0c\u589e\u52a0\u8fdb\u7a0b\u6027\u80fd\u500d\u6570\u589e\u52a0\u3002
\u4e24\u4e2a\u8fdb\u7a0b\u5f00\u5728\u540c\u4e00\u4e2a CPU \u7684\u540c\u4e00\u4e2a CORE \u4e2d\u7684\u65f6\u5019\u6027\u80fd\u51cf\u534a\uff0c\u56e0\u4e3a\u4f7f\u7528\u540c\u4e00\u5957 CORE \u7684\u8ba1\u7b97\u5355\u5143\uff0c\u6240\u4ee5\u53ef\u4ee5\u7406\u89e3\u3002<\/p>\n

[\u7591\u95ee]
\u591a\u7ebf\u7a0b\u7684\u6027\u80fd\u53d8\u5316\u5e94\u8be5\u548c\u591a\u8fdb\u7a0b\u7684\u4e00\u6837\u9884\u671f\uff0c\u5b9e\u9645\u6d4b\u8bd5\u7ed3\u679c\u591a\u7ebf\u7a0b\u7684\u6027\u80fd\u63d0\u5347\u5f88\u5c11\u3002\uff08\u5230\u5e95\u662f\u4ec0\u4e48\u56e0\u7d20\u5bfc\u81f4\u7684\u8fd9\u4e2a\u6d4b\u8bd5\u7ed3\u679c\uff0c\u6ca1\u6709\u601d\u8def\uff0c\u6709\u77e5\u9053\u7684\u5927\u4f6c\u80fd\u544a\u8bc9\u4e00\u4e0b\u5417\uff1f\uff1f\uff1f <\/div>\n

\u5927\u4f6c\u6709\u8a71\u8aaa<\/b> (6<\/span>) <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n
    \n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : msg7086 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u4f60\u7528\u591a\u7ebf\u7a0b\u8dd1\u7684\u65f6\u5019\uff0cCPU \u5403\u6ee1\u4e86\u5417\uff1f <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : tom82232 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @msg7086 CPU \u662f 100%us <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : msg7086 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @tom82232 \u6211\u7684\u610f\u601d\u662f\uff0c\u6bcf\u4e2a Core \u90fd\u5403\u6ee1\u4e86\u4e48\u3002\u7136\u540e\u5c31\u662f\u770b\u770b\u591a\u7ebf\u7a0b\u4e0b\u7684\u7b97\u529b\u548c\u65f6\u95f4\u8ba1\u7b97\u6709\u6ca1\u6709\u9519\u3002
    \u4e0a\u9762\u4ee3\u7801\u8d34\u5f97\u592a\u4e71\u5b9e\u5728\u8bfb\u4e0d\u4e0b\u53bb\u4e86\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : besto <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u5148\u8bf4\u70b9 \u522b\u7684\uff0ctimer \u505a\u7684\u6beb\u65e0\u610f\u4e49\uff0c\u4f60\u8fd9\u91cc\u9762\u5168\u90e8\u6ca1 mutex\uff0c\u4e0d\u5982 stat \u7684\u65f6\u5019\u5c31\u4e00\u4e2a\u7b80\u5355\u903b\u8f91 sleep(x), \u7136\u540e\u76f4\u63a5\u7b97\u8fd9\u4e2a\u671f\u95f4\u5230\u5e95\u7b97\u4e86\u591a\u5c11\u3002\u591a\u7ebf\u7a0b\u6ca1\u6709\u663e\u8457\u63d0\u5347\u6211\u89c9\u5f97\u6709\u5f88\u5927\u539f\u56e0\u662f\u548c cache \u547d\u4e2d\u6709\u5173\u7cfb\u3002 \u8bd5\u8bd5\u52a0\u5927\u8ba1\u7b97\u91cf\uff1a
    diff –git a\/b.c b\/b.c
    index 5168b0d..a92dc5e 100644
    — a\/b.c
    +++ b\/b.c
    @@ -28,6 +28,8 @@ uint64_t prev[CPU_MAX];
    uint64_t tmp[CPU_MAX];
    int flag_stat = 0;<\/p>\n

    +uint8_t *cache;
    +
    static void
    init(void)
    {
    @@ -116,6 +118,7 @@ tdata[seq].a += 1;
    tdata[seq].b += tdata[seq].e*8;
    tdata[seq].c += 1;
    tdata[seq].d += tdata[seq].e*8;
    +memset(cache, 0, 64*1024*1024);
    }<\/p>\n

    return NULL;
    @@ -195,6 +198,7 @@ return 0;<\/p>\n

    int main(int argc, char **argv)
    {
    + cache = malloc(64*1024*1024);
    \/\/program thread-num thread-cpu-seq
    init();
    argc–, argv++; <\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
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    \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : tom82232 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @besto timer \u53ef\u4ee5\u4e0d\u53bb\u8003\u8651\uff0c\u90fd\u6ca1\u5173\u7cfb\u3002\u7d2f\u52a0\u7684\u65f6\u5019\u5904\u7406\u7684\u6570\u636e\u90fd\u6ca1\u6709\u53d8\u5316\uff0c\u8fd9\u6837\u4e5f\u4f1a\u53d1\u751f cache \u4e0d\u547d\u4e2d\uff1f <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : besto <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @tom82232 \u8bf4\u5b9e\u8bdd\uff0c\u6211\u4e0d\u80fd\u786e\u5b9a\u662f\u4e0d\u662f cache \u547d\u4e2d\u5bfc\u81f4\uff0c\u4f46\u73b0\u8c61\u8ba9\u6211\u5f88\u6000\u7591\u3002\u53e6\u4e00\u4e2a\u53ef\u6000\u7591\u7684\u70b9\u5c31\u662f\u4f60\u7684\u8fd9\u4e2a\u8ba1\u7b97\u8fd0\u7b97\u91cf\u7684\u65b9\u6cd5\u3002\u3002\u3002\u6240\u4ee5\u8ba9\u6bcf\u4e2a\u5faa\u73af\u591a\u505a\u70b9\u4e8b\u60c5\u4e5f\u53ef\u80fd\u662f\u51cf\u5c11\u8bef\u5dee\u7684\u771f\u6b63\u539f\u56e0 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n","protected":false},"excerpt":{"rendered":"

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