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LibWebView: Add process statistics calculations for macOS

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Andrew Kaster 2024-04-09 11:33:10 -06:00 • committed by Andrew Kaster
commit 2bd767909c
Notes: sideshowbarker 2024-07-17 07:43:05 +09:00
1 changed files with 55 additions and 1 deletions
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56
Userland/Libraries/LibWebView/Platform/ProcessStatisticsMach.cpp
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@ -11,13 +11,67 @@
#endif
#include <AK/ByteString.h>
#include <AK/Time.h>
#include <LibCore/MachPort.h>
#include <LibWebView/Platform/ProcessStatisticsMach.h>
namespace WebView {
ErrorOr<void> update_process_statistics(ProcessStatistics&)
static auto user_hz = sysconf(_SC_CLK_TCK);
ErrorOr<void> update_process_statistics(ProcessStatistics& statistics)
{
host_cpu_load_info_data_t cpu_info {};
mach_msg_type_number_t count = HOST_CPU_LOAD_INFO_COUNT;
auto res = host_statistics(mach_host_self(), HOST_CPU_LOAD_INFO, reinterpret_cast<host_info_t>(&cpu_info), &count);
if (res != KERN_SUCCESS) {
dbgln("Failed to get host statistics: {}", mach_error_string(res));
return Core::mach_error_to_error(res);
}
u64 total_cpu_ticks = 0;
total_cpu_ticks += cpu_info.cpu_ticks[CPU_STATE_USER];
total_cpu_ticks += cpu_info.cpu_ticks[CPU_STATE_SYSTEM];
total_cpu_ticks += cpu_info.cpu_ticks[CPU_STATE_NICE];
total_cpu_ticks += cpu_info.cpu_ticks[CPU_STATE_IDLE];
auto const total_cpu_ticks_diff = total_cpu_ticks - statistics.total_time_scheduled;
auto const total_cpu_seconds_diff = total_cpu_ticks_diff / (static_cast<float>(user_hz));
auto const total_cpu_micro_diff = total_cpu_seconds_diff * 1'000'000;
statistics.total_time_scheduled = total_cpu_ticks;
for (auto& process : statistics.processes) {
mach_task_basic_info_data_t basic_info {};
count = MACH_TASK_BASIC_INFO_COUNT;
res = task_info(process.child_task_port.port(), MACH_TASK_BASIC_INFO, reinterpret_cast<task_info_t>(&basic_info), &count);
if (res != KERN_SUCCESS) {
dbgln("Failed to get task info for pid {}: {}", process.pid, mach_error_string(res));
return Core::mach_error_to_error(res);
}
process.memory_usage_bytes = basic_info.resident_size;
task_thread_times_info_data_t time_info {};
count = TASK_THREAD_TIMES_INFO_COUNT;
res = task_info(process.child_task_port.port(), TASK_THREAD_TIMES_INFO, reinterpret_cast<task_info_t>(&time_info), &count);
if (res != KERN_SUCCESS) {
dbgln("Failed to get thread times info for pid {}: {}", process.pid, mach_error_string(res));
return Core::mach_error_to_error(res);
}
timeval scratch_timeval = { static_cast<time_t>(time_info.user_time.seconds), static_cast<suseconds_t>(time_info.user_time.microseconds) };
auto time_in_process = Duration::from_timeval(scratch_timeval);
scratch_timeval = { static_cast<time_t>(time_info.system_time.seconds), static_cast<suseconds_t>(time_info.system_time.microseconds) };
time_in_process += Duration::from_timeval(scratch_timeval);
auto time_diff_process = time_in_process - Duration::from_microseconds(process.time_spent_in_process);
process.time_spent_in_process = time_in_process.to_microseconds();
process.cpu_percent = 0.0f;
if (time_diff_process > Duration::zero())
process.cpu_percent = 100.0f * static_cast<float>(time_diff_process.to_microseconds()) / total_cpu_micro_diff;
}
return {};
}