the-btfash-foundation/tmux-mem-cpu-load
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use sysinfo() to get load avg instead of parsing /proc/ file

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Pawel "l0ner" Soltys 2015-01-10 17:27:54 +01:00
parent e7f2dd25e8
commit 220d260673
1 changed files with 16 additions and 9 deletions
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25
linux/load.cc
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@ -1,23 +1,24 @@
#include <string>
#include <sstream>
#include <fstream>
#include <unistd.h>
#include <unistd.h> // sysconf()?
#include <sys/sysinfo.h>
#include <linux/kernel.h> // SI_LOAD_SHIFT
#include "../luts.h"
std::string load_string( bool use_colors = false ) {
std::ostringstream oss;
std::ifstream loadavg_file( "/proc/loadavg" );
std::string load_line;
std::getline( loadavg_file, load_line );
loadavg_file.close();
float f = static_cast<float>(1 << SI_LOAD_SHIFT);
struct sysinfo sinfo;
sysinfo(&sinfo);
if( use_colors ) {
// Likely does not work on BSD, but not tested
unsigned number_of_cpus = sysconf( _SC_NPROCESSORS_ONLN );
float recent_load = stof(load_line.substr( 0, 4 ));
float recent_load = sinfo.loads[0] / f;
// colors range from zero to twice the number of cpu's
// for the most recent load metric
@ -29,8 +30,14 @@ std::string load_string( bool use_colors = false ) {
oss << load_lut[load_percent];
}
oss << load_line.substr( 0, 14 );
// set precision so we get results like "0.22"
oss.setf( std::ios::fixed );
oss.precision(2);
oss << sinfo.loads[0] / f << " " << sinfo.load[1] / f << " "
<< sinfo.load[2] / f;
if( use_colors )
oss << "#[fg=default,bg=default]";