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Use fdinfo's engine count when refreshing utilisation rate #387

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Merged
Syllo merged 1 commit into from
Jun 28, 2025
+14 −3
Merged

Use fdinfo's engine count when refreshing utilisation rate #387

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2 changes: 2 additions & 0 deletions include/nvtop/extract_gpuinfo_common.h
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Original file line number Diff line number Diff line change
Expand Up @@ -60,6 +60,7 @@ enum gpuinfo_static_info_valid {
gpuinfo_n_shared_cores_valid,
gpuinfo_l2cache_size_valid,
gpuinfo_n_exec_engines_valid,
gpuinfo_engine_count_valid,
gpuinfo_static_info_count,
};

Expand All @@ -74,6 +75,7 @@ struct gpuinfo_static_info {
unsigned n_shared_cores;
unsigned l2cache_size;
unsigned n_exec_engines;
unsigned engine_count;
bool integrated_graphics;
bool encode_decode_shared;
unsigned char valid[(gpuinfo_static_info_count + CHAR_BIT - 1) / CHAR_BIT];
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8 changes: 7 additions & 1 deletion src/extract_gpuinfo.c
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Original file line number Diff line number Diff line change
Expand Up @@ -340,6 +340,7 @@ void gpuinfo_refresh_utilisation_rate(struct gpu_info *gpu_info) {
unsigned int utilisation_rate;
uint64_t max_freq_hz;
double avg_delta_secs;
unsigned int ec;

for (unsigned processIdx = 0; processIdx < gpu_info->processes_count; ++processIdx) {
struct gpu_process *process_info = &gpu_info->processes[processIdx];
Expand All @@ -351,9 +352,14 @@ void gpuinfo_refresh_utilisation_rate(struct gpu_info *gpu_info) {
if (!gfx_total_process_cycles)
return;

if (IS_VALID(gpuinfo_engine_count_valid, gpu_info->static_info.valid))
ec = gpu_info->static_info.engine_count;
else
ec = 1;

avg_delta_secs = ((double)total_delta / gpu_info->processes_count) / 1000000000.0;
max_freq_hz = gpu_info->dynamic_info.gpu_clock_speed_max * 1000000;
utilisation_rate = (unsigned int)((((double)gfx_total_process_cycles) / (((double)max_freq_hz) * avg_delta_secs * 2)) * 100);
utilisation_rate = (unsigned int)((((double)gfx_total_process_cycles) / (((double)max_freq_hz) * avg_delta_secs * ec)) * 100);
utilisation_rate = utilisation_rate > 100 ? 100 : utilisation_rate;

SET_GPUINFO_DYNAMIC(&gpu_info->dynamic_info, gpu_util_rate, utilisation_rate);
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7 changes: 5 additions & 2 deletions src/extract_gpuinfo_mali_common.c
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Original file line number Diff line number Diff line change
Expand Up @@ -456,6 +456,7 @@ bool mali_common_parse_drm_fdinfo(struct gpu_info *info, FILE *fdinfo_file,
check_fdinfo_keys match_keys,
struct fdinfo_data *fid)
{
struct gpuinfo_static_info *static_info = &info->static_info;
static char *line = NULL;
static size_t line_buf_size = 0;
uint64_t total_time = 0;
Expand Down Expand Up @@ -529,8 +530,10 @@ bool mali_common_parse_drm_fdinfo(struct gpu_info *info, FILE *fdinfo_file,
}
}

if (fid->engine_count)
SET_GPUINFO_PROCESS(process_info, gfx_engine_used, total_time);
if (fid->engine_count) {
SET_GPUINFO_PROCESS(process_info, gfx_engine_used, total_time);
SET_GPUINFO_STATIC(static_info, engine_count, fid->engine_count);
}

if (!client_id_set)
return false;
Expand Down