the-btfash-foundation/tmux-mem-cpu-load
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Make cpu usage timing interval user option.

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Also convert sleep to microseconds so the delay time can always be less than the
tmux status bar update interval.
This commit is contained in:
Matt McCormick (thewtex) 2010-02-25 08:54:18 -06:00
parent 00a85129fa
commit dbd3f8e3c7
1 changed files with 23 additions and 13 deletions
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36
tmux-mem-cpu-load.cpp
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@ -7,7 +7,7 @@ using namespace std;
#include <unistd.h> // sleep
float cpu_percentage()
float cpu_percentage( unsigned int cpu_usage_delay )
{
string stat_line;
size_t line_start_pos;
@ -41,7 +41,7 @@ float cpu_percentage()
iss >> current_user >> current_nice >> current_system >> current_idle;
iss.clear();
sleep(1);
usleep( cpu_usage_delay );
stat_file.open("/proc/stat");
getline(stat_file, stat_line);
@ -66,7 +66,7 @@ float cpu_percentage()
return static_cast<float>(diff_user + diff_system + diff_nice)/static_cast<float>(diff_user + diff_system + diff_nice + diff_idle)*100.0;
}
string cpu_string()
string cpu_string( unsigned int cpu_usage_delay )
{
string meter = "[ ]";
int meter_count = 0;
@ -75,7 +75,7 @@ string cpu_string()
oss.precision( 1 );
oss.setf( ios::fixed | ios::right );
percentage = cpu_percentage();
percentage = cpu_percentage( cpu_usage_delay );
meter_count = 1;
while(meter_count*9.99 < percentage)
{
@ -141,15 +141,25 @@ string load_string()
int main(int argc, char** argv)
{
try
{
std::cout << mem_string() << ' ' << cpu_string() << ' ' << load_string();
}
catch(const exception &e)
{
cerr << "Error: " << e.what() << endl;
return 1;
}
unsigned int cpu_usage_delay = 900000;
if( argc > 1 )
{
try
{
istringstream iss( argv[1] );
iss.exceptions ( ifstream::failbit | ifstream::badbit );
unsigned int status_interval;
iss >> status_interval;
cpu_usage_delay = status_interval * 1000000 - 100000;
}
catch(const exception &e)
{
cerr << "Usage: " << argv[0] << " [tmux_status-interval(seconds)]" << endl;
return 1;
}
}
std::cout << mem_string() << ' ' << cpu_string( cpu_usage_delay ) << ' ' << load_string();
return 0;
}