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accurate cpu usage in diagnostic tool

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Former-commit-id: 8ee7584cffc5c5cacfb7ad20fc964112974683e4
This commit is contained in:
christianEQ 2021-06-17 18:32:11 +00:00
parent ea12db4433
commit fd72894fbf
1 changed files with 29 additions and 13 deletions
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42
src/keydb-diagnostic-tool.cpp
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@ -863,6 +863,27 @@ int extractPropertyFromInfo(const char *info, const char *key, double &val) {
return 0;
}
double getServerCpuTime(redisContext *ctx) {
redisReply *reply = (redisReply*)redisCommand(ctx, "INFO");
if (reply->type != REDIS_REPLY_STRING) {
freeReplyObject(reply);
printf("Error executing INFO command. Exiting.\r\n");
return -1;
}
double used_cpu_user, used_cpu_sys;
if (extractPropertyFromInfo(reply->str, "used_cpu_user", used_cpu_user)) {
printf("Error reading user CPU usage from INFO command. Exiting.\r\n");
return -1;
}
if (extractPropertyFromInfo(reply->str, "used_cpu_sys", used_cpu_sys)) {
printf("Error reading system CPU usage from INFO command. Exiting.\r\n");
return -1;
}
freeReplyObject(reply);
return used_cpu_user + used_cpu_sys;
}
int main(int argc, const char **argv) {
int i;
@ -898,11 +919,12 @@ int main(int argc, const char **argv) {
const char *set_value = "abcdefghijklmnopqrstuvwxyz";
int threads_used = 0;
unsigned int period = 5;
char command[63];
initBenchmarkThreads();
redisContext *ctx = getRedisContext(config.hostip, config.hostport, config.hostsocket);
double cpu_usage;
double cpu_usage, last_cpu_usage = getServerCpuTime(ctx);
while (threads_used < config.max_threads) {
printf("Creating %d clients for thread %d...\n", config.numclients, threads_used);
@ -920,20 +942,14 @@ int main(int argc, const char **argv) {
}
threads_used++;
sleep(1);
redisReply *reply = (redisReply*)redisCommand(ctx, "INFO");
if (reply->type != REDIS_REPLY_STRING) {
freeReplyObject(reply);
printf("Error executing INFO command. Exiting.\r\n");
sleep(period);
cpu_usage = getServerCpuTime(ctx);
if (cpu_usage < 0) {
break;
}
if (extractPropertyFromInfo(reply->str, "used_cpu_sys", cpu_usage)) {
printf("Error reading CPU usage from INFO command. Exiting.\r\n");
break;
}
printf("CPU Usage: %f\r\n", cpu_usage);
freeReplyObject(reply);
printf("CPU Usage: %.1f%%\r\n", (cpu_usage - last_cpu_usage) * 100 / period);
last_cpu_usage = cpu_usage;
}
printf("Done.\n");