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report: add average CPU consumption #79

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report: add average CPU consumption #79

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15 changes: 15 additions & 0 deletions src/node_report.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -106,6 +106,7 @@ static char report_directory[NR_MAXPATH + 1] = ""; // defaults to current workin
std::string version_string = UNKNOWN_NODEVERSION_STRING;
std::string commandline_string = "";
static TIME_TYPE loadtime_tm_struct; // module load time
static time_t load_time; // module load time absolute

/*******************************************************************************
* Functions to process node-report configuration options:
Expand Down Expand Up @@ -301,6 +302,7 @@ void SetLoadTime() {
gettimeofday(&time_val, nullptr);
localtime_r(&time_val.tv_sec, &loadtime_tm_struct);
#endif
load_time = mktime(&loadtime_tm_struct);
}

/*******************************************************************************
Expand Down Expand Up @@ -1020,6 +1022,13 @@ static void PrintGCStatistics(std::ostream& out, Isolate* isolate) {
******************************************************************************/
static void PrintResourceUsage(std::ostream& out) {
char buf[64];
double cpu_abs;
double cpu_percentage;
time_t current_time; // current time absolute
time(&current_time);
auto uptime = difftime(current_time, load_time);
if (uptime == 0)
uptime = 1; // avoid division by zero.
out << "\n================================================================================";
out << "\n==== Resource Usage ============================================================\n";

Expand All @@ -1038,6 +1047,9 @@ static void PrintResourceUsage(std::ostream& out) {
snprintf( buf, sizeof(buf), "%ld.%06ld", stats.ru_stime.tv_sec, stats.ru_stime.tv_usec);
out << "\n Kernel mode CPU: " << buf << " secs";
#endif
cpu_abs = stats.ru_utime.tv_sec + 0.000001 * stats.ru_utime.tv_usec + stats.ru_stime.tv_sec + 0.000001 * stats.ru_stime.tv_usec;
cpu_percentage = (cpu_abs / uptime) * 100.0;
out << "\n Average CPU Consumption : "<< cpu_percentage << "%";
out << "\n Maximum resident set size: ";
WriteInteger(out, stats.ru_maxrss * 1024);
out << " bytes\n Page faults: " << stats.ru_majflt << " (I/O required) "
Expand All @@ -1059,6 +1071,9 @@ static void PrintResourceUsage(std::ostream& out) {
snprintf( buf, sizeof(buf), "%ld.%06ld", stats.ru_stime.tv_sec, stats.ru_stime.tv_usec);
out << "\n Kernel mode CPU: " << buf << " secs";
#endif
cpu_abs = stats.ru_utime.tv_sec + 0.000001 * stats.ru_utime.tv_usec + stats.ru_stime.tv_sec + 0.000001 * stats.ru_stime.tv_usec;
cpu_percentage = (cpu_abs / uptime) * 100.0;
out << "\n Average CPU Consumption : " << cpu_percentage << "%";
out << "\n Filesystem activity: " << stats.ru_inblock << " reads "
<< stats.ru_oublock << " writes";
}
Expand Down