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On some Adreno devices (the Retroid Pocket Duo) SELinux hides kgsl's sysfs nodes from apps, so the HUD showed no GPU % and no GPU clock. Devices whose nodes are readable keep using them; nothing changes there or on GPUs without kgsl. Where the nodes are blocked: - GPU %: a native reader maps kgsl's memstore read-only (any kgsl client may) and samples the ringbuffer start/end timestamps once a millisecond while a HUD is shown. That covers all GPU work, Android's own composition included. - Backup for GPU %: an implicit Vulkan layer in the guest (tools/gpuload) and the compositor time their own GPU work with timestamp queries. It runs until the memstore stamps are seen moving, and for the whole session if they never move. - GPU clock: a small GPU job of our own reads the always-on and RBBM cycle counters (libgpuclock). The HUD diagnostics export lists which source each GPU value came from. tools/gpuload/build.sh takes the Vulkan headers from build_local.sh's NDK first and keeps NDK paths with spaces intact.
25 lines
1001 B
C
25 lines
1001 B
C
#include <assert.h>
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#include <stdio.h>
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#include "gpuload_busy.h"
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int main(void) {
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const uint64_t max = 1000;
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assert(gpuload_interval(10, 20, max) == 10);
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// Each batch counts on its own, even when the counter restarted in between (later batch has smaller ticks).
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assert(gpuload_interval(900000, 900400, max) == 400);
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assert(gpuload_interval(50, 350, max) == 300);
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// Backwards, empty or too long: nothing.
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assert(gpuload_interval(60, 50, max) == 0);
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assert(gpuload_interval(70, 70, max) == 0);
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assert(gpuload_interval(100, 100 + max + 1, max) == 0);
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assert(gpuload_interval(100, 100 + max, max) == max);
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// Query results: both halves available and an end that differs from the last harvested one.
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assert(gpuload_result_is_new(1, 1, 500, 400));
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assert(!gpuload_result_is_new(1, 1, 400, 400));
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assert(!gpuload_result_is_new(1, 0, 500, 400));
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assert(!gpuload_result_is_new(0, 1, 500, 400));
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puts("test_gpuload_busy: ok");
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return 0;
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}
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