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/*
htop - GPUMeter.c
(C) 2023 htop dev team
Released under the GNU GPLv2+, see the COPYING file
in the source distribution for its full text.
*/
#include "config.h" // IWYU pragma: keep
#include "linux/GPUMeter.h"
#include "CRT.h"
#include "RichString.h"
#include "linux/LinuxMachine.h"
static size_t activeMeters;
bool GPUMeter_active(void) {
return activeMeters > 0;
}
struct EngineData {
const char* key; /* owned by LinuxMachine */
unsigned long long int timeDiff;
};
static struct EngineData GPUMeter_engineData[4];
static unsigned long long int prevResidueTime, curResidueTime;
static double totalUsage;
static unsigned long long int totalGPUTimeDiff;
static const int GPUMeter_attributes[] = {
GPU_ENGINE_1,
GPU_ENGINE_2,
GPU_ENGINE_3,
GPU_ENGINE_4,
GPU_RESIDUE,
};
static int humanTimeUnit(char* buffer, size_t size, unsigned long long int value) {
if (value < 1000)
return xSnprintf(buffer, size, "%3lluns", value);
if (value < 10000)
return xSnprintf(buffer, size, "%1llu.%1lluus", value / 1000, (value % 1000) / 100);
value /= 1000;
if (value < 1000)
return xSnprintf(buffer, size, "%3lluus", value);
if (value < 10000)
return xSnprintf(buffer, size, "%1llu.%1llums", value / 1000, (value % 1000) / 100);
value /= 1000;
if (value < 1000)
return xSnprintf(buffer, size, "%3llums", value);
if (value < 10000)
return xSnprintf(buffer, size, "%1llu.%1llus", value / 1000, (value % 1000) / 100);
value /= 1000;
if (value < 600)
return xSnprintf(buffer, size, "%3llus", value);
value /= 60;
if (value < 600)
return xSnprintf(buffer, size, "%3llum", value);
value /= 60;
if (value < 96)
return xSnprintf(buffer, size, "%3lluh", value);
value /= 24;
return xSnprintf(buffer, size, "%3llud", value);
}
static void GPUMeter_updateValues(Meter* this) {
const Machine* host = this->host;
const LinuxMachine* lhost = (const LinuxMachine*) host;
const GPUEngineData* gpuEngineData;
char* buffer = this->txtBuffer;
size_t size = sizeof(this->txtBuffer);
int written;
unsigned int i;
uint64_t monotonictimeDelta;
assert(ARRAYSIZE(GPUMeter_engineData) + 1 == ARRAYSIZE(GPUMeter_attributes));
totalGPUTimeDiff = saturatingSub(lhost->curGpuTime, lhost->prevGpuTime);
monotonictimeDelta = host->monotonicMs - host->prevMonotonicMs;
prevResidueTime = curResidueTime;
curResidueTime = lhost->curGpuTime;
for (gpuEngineData = lhost->gpuEngineData, i = 0; gpuEngineData && i < ARRAYSIZE(GPUMeter_engineData); gpuEngineData = gpuEngineData->next, i++) {
GPUMeter_engineData[i].key = gpuEngineData->key;
GPUMeter_engineData[i].timeDiff = saturatingSub(gpuEngineData->curTime, gpuEngineData->prevTime);
curResidueTime = saturatingSub(curResidueTime, gpuEngineData->curTime);
this->values[i] = 100.0 * GPUMeter_engineData[i].timeDiff / (1000 * 1000) / monotonictimeDelta;
}
this->values[ARRAYSIZE(GPUMeter_engineData)] = 100.0 * saturatingSub(curResidueTime, prevResidueTime) / (1000 * 1000) / monotonictimeDelta;
totalUsage = 100.0 * totalGPUTimeDiff / (1000 * 1000) / monotonictimeDelta;
written = snprintf(buffer, size, "%.1f", totalUsage);
METER_BUFFER_CHECK(buffer, size, written);
METER_BUFFER_APPEND_CHR(buffer, size, '%');
}
static void GPUMeter_display(const Object* cast, RichString* out) {
char buffer[50];
int written;
const Meter* this = (const Meter*)cast;
unsigned int i;
RichString_writeAscii(out, CRT_colors[METER_TEXT], ":");
written = xSnprintf(buffer, sizeof(buffer), "%4.1f", totalUsage);
RichString_appendnAscii(out, CRT_colors[METER_VALUE], buffer, written);
RichString_appendnAscii(out, CRT_colors[METER_TEXT], "%(", 2);
written = humanTimeUnit(buffer, sizeof(buffer), totalGPUTimeDiff);
RichString_appendnAscii(out, CRT_colors[METER_VALUE], buffer, written);
RichString_appendnAscii(out, CRT_colors[METER_TEXT], ")", 1);
for (i = 0; i < ARRAYSIZE(GPUMeter_engineData); i++) {
if (!GPUMeter_engineData[i].key)
break;
RichString_appendnAscii(out, CRT_colors[METER_TEXT], " ", 1);
RichString_appendAscii(out, CRT_colors[METER_TEXT], GPUMeter_engineData[i].key);
RichString_appendnAscii(out, CRT_colors[METER_TEXT], ":", 1);
if (isNonnegative(this->values[i]))
written = xSnprintf(buffer, sizeof(buffer), "%4.1f", this->values[i]);
else
written = xSnprintf(buffer, sizeof(buffer), " N/A");
RichString_appendnAscii(out, CRT_colors[METER_VALUE], buffer, written);
RichString_appendnAscii(out, CRT_colors[METER_TEXT], "%(", 2);
written = humanTimeUnit(buffer, sizeof(buffer), GPUMeter_engineData[i].timeDiff);
RichString_appendnAscii(out, CRT_colors[METER_VALUE], buffer, written);
RichString_appendnAscii(out, CRT_colors[METER_TEXT], ")", 1);
}
}
static void GPUMeter_init(Meter* this ATTR_UNUSED) {
activeMeters++;
}
static void GPUMeter_done(Meter* this ATTR_UNUSED) {
assert(activeMeters > 0);
activeMeters--;
}
const MeterClass GPUMeter_class = {
.super = {
.extends = Class(Meter),
.delete = Meter_delete,
.display = GPUMeter_display,
},
.init = GPUMeter_init,
.done = GPUMeter_done,
.updateValues = GPUMeter_updateValues,
.defaultMode = BAR_METERMODE,
.maxItems = ARRAYSIZE(GPUMeter_engineData) + 1,
.total = 100.0,
.attributes = GPUMeter_attributes,
.name = "GPU",
.uiName = "GPU usage",
.caption = "GPU"
};
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