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DSP Performance benchmark #22

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DSP Performance benchmark #22

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22 changes: 20 additions & 2 deletions hw/xbox/mcpx_apu.c
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Original file line number Diff line number Diff line change
Expand Up @@ -652,10 +652,28 @@ static void se_frame(void *opaque)

if ((d->gp.regs[NV_PAPU_GPRST] & NV_PAPU_GPRST_GPRST)
&& (d->gp.regs[NV_PAPU_GPRST] & NV_PAPU_GPRST_GPDSPRST)) {
dsp_start_frame(d->gp.dsp);

// hax
dsp_run(d->gp.dsp, 1000);


// Use these to fine tune testing
unsigned int frames = 1; // Target should be ~15
unsigned int cycles = 40000; // Target should be ~106666, minimum 40000

// Don't touch this
uint64_t dryrun = qemu_clock_get_ns(QEMU_CLOCK_REALTIME);
uint64_t before = qemu_clock_get_ns(QEMU_CLOCK_REALTIME);
for(int i = 0; i < frames; i++) {
dsp_start_frame(d->gp.dsp);
dsp_run(d->gp.dsp, cycles);
}
uint64_t after = qemu_clock_get_ns(QEMU_CLOCK_REALTIME);
uint64_t elapsed = after - before;
uint64_t budget = frames * 666666; // We have 0.666666 ms per frame
budget *= cycles; // We did only a small amount of cycles
budget /= 106666; // But we should have done 106666
uint64_t elapsed_per_frame = elapsed / frames;
printf("%d frames: %" PRIu64 " ns elapsed (%" PRId64 " ns dryrun, %" PRId64 " ns per frame [%f%% realtime]), %" PRId64 " ns of budget left\n", frames, elapsed, before - dryrun, elapsed_per_frame, (double)budget / elapsed * 100.0, budget - elapsed);
}
if ((d->ep.regs[NV_PAPU_EPRST] & NV_PAPU_GPRST_GPRST)
&& (d->ep.regs[NV_PAPU_EPRST] & NV_PAPU_GPRST_GPDSPRST)) {
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