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Viktor Barzin 2025-11-22 22:39:36 +00:00
parent 090766cab0
commit a33f99e765
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dot_tmux/plugins/tmux-mem-cpu-load/openbsd/cpu.cc Normal file
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/* vim: tabstop=2 shiftwidth=2 expandtab textwidth=80 linebreak wrap
*
* Copyright 2012 Matthew McCormick
* Copyright 2015 Pawel 'l0ner' Soltys
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <unistd.h> // usleep
#include <sys/sysctl.h>
#include <sys/types.h>
#include "error.h"
#include "cpu.h"
uint32_t get_cpu_count()
{
int cpu_count = 1; // default to 1
int mib[2] = { CTL_HW, HW_NCPUONLINE };
size_t len = sizeof( cpu_count );
if( sysctl( mib, 2, &cpu_count, &len, NULL, 0 ) < 0 )
{
error( "sysctl: error getting cpu count" );
}
return static_cast<uint32_t>( cpu_count );
}
float cpu_percentage( unsigned int cpu_usage_delay )
{
int cpu_ctl[] = { CTL_KERN, KERN_CPTIME };
u_long load1[CP_STATES];
u_long load2[CP_STATES];
size_t size = sizeof( load1 );
// get cpu times
if( sysctl( cpu_ctl, 2, &load1, &size, NULL, 0 ) < 0 )
{
error( "sysctl: error getting initial cpu stats" );
}
usleep( cpu_usage_delay );
size = sizeof( load2 );
// update cpu times
if( sysctl( cpu_ctl, 2, &load2, &size, NULL, 0 ) < 0 )
{
error( "sysctl: error getting updated cpu stats" );
}
// Current load times
unsigned long long current_user = load1[CP_USER];
unsigned long long current_system = load1[CP_SYS];
unsigned long long current_nice = load1[CP_NICE];
unsigned long long current_idle = load1[CP_IDLE];
// Next load times
unsigned long long next_user = load2[CP_USER];
unsigned long long next_system = load2[CP_SYS];
unsigned long long next_nice = load2[CP_NICE];
unsigned long long next_idle = load2[CP_IDLE];
// Difference between the two
unsigned long long diff_user = next_user - current_user;
unsigned long long diff_system = next_system - current_system;
unsigned long long diff_nice = next_nice - current_nice;
unsigned long long diff_idle = next_idle - current_idle;
return static_cast<float>( diff_user + diff_system + diff_nice ) /
static_cast<float>( diff_user + diff_system + diff_nice + diff_idle ) *
100.0;
}