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CpuUsage: improve performance

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by moving the first `/proc/stat` query earlier
This commit is contained in:
李通洲
2022-09-27 22:06:53 +08:00
parent 5096b4a81d
commit db6ad5a268
8 changed files with 61 additions and 53 deletions
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src/modules/cpuUsage.c
+36 -2
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@@ -1,21 +1,55 @@
#include "fastfetch.h"
#include "common/printing.h"
#include "detection/cpuUsage/cpuUsage.h"
#include "sys/time.h"
#define FF_CPU_USAGE_MODULE_NAME "CPU Usage"
#define FF_CPU_USAGE_NUM_FORMAT_ARGS 1
time_t getTimeInMs()
{
struct timeval timeNow;
gettimeofday(&timeNow, NULL);
return (timeNow.tv_sec * 1000) + (timeNow.tv_usec / 1000);
}
static long inUseAll1, totalAll1, startTime;
void ffPrepareCPUUsage()
{
startTime = getTimeInMs();
ffGetCpuUsageInfo(&inUseAll1, &totalAll1);
}
void ffPrintCPUUsage(FFinstance* instance)
{
double cpuPercent = 0;
const char* error = ffGetCpuUsagePercent(&cpuPercent);
const char* error = NULL;
if(startTime == 0)
{
error = ffGetCpuUsageInfo(&inUseAll1, &totalAll1);
if(error)
goto error;
nanosleep(&(struct timespec){ 1, 0 }, NULL);
}
else
{
time_t duration = getTimeInMs() - startTime;
if(duration < 1000)
nanosleep(&(struct timespec){ 0, (1000 - duration) * 1000000L }, NULL);
}
long inUseAll2, totalAll2;
error = ffGetCpuUsageInfo(&inUseAll2, &totalAll2);
if(error)
{
error:
ffPrintError(instance, FF_CPU_USAGE_MODULE_NAME, 0, &instance->config.cpu, "%s", error);
return;
}
double cpuPercent = (double)(inUseAll2 - inUseAll1) / (double)(totalAll2 - totalAll1) * 100;
if(instance->config.cpuUsage.outputFormat.length == 0)
{
ffPrintLogoAndKey(instance, FF_CPU_USAGE_MODULE_NAME, 0, &instance->config.cpuUsage.key);