From: Chris Wilson <chris@chris-wilson.co.uk> To: intel-gfx@lists.freedesktop.org Cc: igt-dev@lists.freedesktop.org Subject: [PATCH i-g-t] i915/gem_exec_latency: Normalize results into ns Date: Tue, 29 Jan 2019 08:52:30 +0000 [thread overview] Message-ID: <20190129085230.20182-1-chris@chris-wilson.co.uk> (raw) Present the latency results in nanoseconds not RCS cycles. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> --- tests/i915/gem_exec_latency.c | 38 +++++++++++++++++++++++++++++++---- 1 file changed, 34 insertions(+), 4 deletions(-) diff --git a/tests/i915/gem_exec_latency.c b/tests/i915/gem_exec_latency.c index de16322a6..ea44adc14 100644 --- a/tests/i915/gem_exec_latency.c +++ b/tests/i915/gem_exec_latency.c @@ -59,6 +59,7 @@ #define PREEMPT 0x2 static unsigned int ring_size; +static double rcs_clock; static void poll_ring(int fd, unsigned ring, const char *name) @@ -207,7 +208,7 @@ static void latency_on_ring(int fd, igt_cork_unplug(&c); gem_set_domain(fd, obj[1].handle, I915_GEM_DOMAIN_GTT, 0); - gpu_latency = (results[repeats-1] - results[0]) / (double)(repeats-1); + gpu_latency = (results[repeats-1] - results[1]) / (double)(repeats-2); gem_set_domain(fd, obj[2].handle, I915_GEM_DOMAIN_GTT, I915_GEM_DOMAIN_GTT); @@ -238,10 +239,11 @@ static void latency_on_ring(int fd, igt_assert(offset == obj[2].offset); gem_set_domain(fd, obj[1].handle, I915_GEM_DOMAIN_GTT, 0); - igt_info("%s: dispatch latency: %.2f, execution latency: %.2f (target %.2f)\n", + igt_info("%s: dispatch latency: %.1fns, execution latency: %.1fns (target %.1fns)\n", name, - (end - start) / (double)repeats, - gpu_latency, (results[repeats - 1] - results[0]) / (double)(repeats - 1)); + (end - start) / (double)repeats * rcs_clock, + gpu_latency * rcs_clock, + (results[repeats - 1] - results[0]) / (double)(repeats - 1) * rcs_clock); munmap(map, 64*1024); munmap(results, 4096); @@ -620,6 +622,30 @@ rthog_latency_on_ring(int fd, unsigned int engine, const char *name, unsigned in munmap(results, MMAP_SZ); } +static double clockrate(void) +{ + volatile uint32_t *reg; + uint32_t r_start, r_end; + struct timespec tv; + uint64_t t_start, t_end; + uint64_t elapsed; + + reg = (volatile uint32_t *)((volatile char *)igt_global_mmio + RCS_TIMESTAMP); + + t_start = igt_nsec_elapsed(&tv); + r_start = *reg; + elapsed = igt_nsec_elapsed(&tv) - t_start; + + usleep(1000); + + t_end = igt_nsec_elapsed(&tv); + r_end = *reg; + elapsed += igt_nsec_elapsed(&tv) - t_end; + + elapsed = (t_end - t_start) + elapsed / 2; + return (r_end - r_start) * 1e9 / elapsed; +} + igt_main { const struct intel_execution_engine *e; @@ -640,6 +666,10 @@ igt_main ring_size = 1024; intel_register_access_init(intel_get_pci_device(), false, device); + rcs_clock = clockrate(); + igt_info("RCS timestamp clock: %.3fKHz, %.1fns\n", + rcs_clock / 1e3, 1e9 / rcs_clock); + rcs_clock = 1e9 / rcs_clock; } igt_subtest("all-rtidle-submit") -- 2.20.1 _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/intel-gfx
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From: Chris Wilson <chris@chris-wilson.co.uk> To: intel-gfx@lists.freedesktop.org Cc: igt-dev@lists.freedesktop.org Subject: [igt-dev] [PATCH i-g-t] i915/gem_exec_latency: Normalize results into ns Date: Tue, 29 Jan 2019 08:52:30 +0000 [thread overview] Message-ID: <20190129085230.20182-1-chris@chris-wilson.co.uk> (raw) Present the latency results in nanoseconds not RCS cycles. Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> --- tests/i915/gem_exec_latency.c | 38 +++++++++++++++++++++++++++++++---- 1 file changed, 34 insertions(+), 4 deletions(-) diff --git a/tests/i915/gem_exec_latency.c b/tests/i915/gem_exec_latency.c index de16322a6..ea44adc14 100644 --- a/tests/i915/gem_exec_latency.c +++ b/tests/i915/gem_exec_latency.c @@ -59,6 +59,7 @@ #define PREEMPT 0x2 static unsigned int ring_size; +static double rcs_clock; static void poll_ring(int fd, unsigned ring, const char *name) @@ -207,7 +208,7 @@ static void latency_on_ring(int fd, igt_cork_unplug(&c); gem_set_domain(fd, obj[1].handle, I915_GEM_DOMAIN_GTT, 0); - gpu_latency = (results[repeats-1] - results[0]) / (double)(repeats-1); + gpu_latency = (results[repeats-1] - results[1]) / (double)(repeats-2); gem_set_domain(fd, obj[2].handle, I915_GEM_DOMAIN_GTT, I915_GEM_DOMAIN_GTT); @@ -238,10 +239,11 @@ static void latency_on_ring(int fd, igt_assert(offset == obj[2].offset); gem_set_domain(fd, obj[1].handle, I915_GEM_DOMAIN_GTT, 0); - igt_info("%s: dispatch latency: %.2f, execution latency: %.2f (target %.2f)\n", + igt_info("%s: dispatch latency: %.1fns, execution latency: %.1fns (target %.1fns)\n", name, - (end - start) / (double)repeats, - gpu_latency, (results[repeats - 1] - results[0]) / (double)(repeats - 1)); + (end - start) / (double)repeats * rcs_clock, + gpu_latency * rcs_clock, + (results[repeats - 1] - results[0]) / (double)(repeats - 1) * rcs_clock); munmap(map, 64*1024); munmap(results, 4096); @@ -620,6 +622,30 @@ rthog_latency_on_ring(int fd, unsigned int engine, const char *name, unsigned in munmap(results, MMAP_SZ); } +static double clockrate(void) +{ + volatile uint32_t *reg; + uint32_t r_start, r_end; + struct timespec tv; + uint64_t t_start, t_end; + uint64_t elapsed; + + reg = (volatile uint32_t *)((volatile char *)igt_global_mmio + RCS_TIMESTAMP); + + t_start = igt_nsec_elapsed(&tv); + r_start = *reg; + elapsed = igt_nsec_elapsed(&tv) - t_start; + + usleep(1000); + + t_end = igt_nsec_elapsed(&tv); + r_end = *reg; + elapsed += igt_nsec_elapsed(&tv) - t_end; + + elapsed = (t_end - t_start) + elapsed / 2; + return (r_end - r_start) * 1e9 / elapsed; +} + igt_main { const struct intel_execution_engine *e; @@ -640,6 +666,10 @@ igt_main ring_size = 1024; intel_register_access_init(intel_get_pci_device(), false, device); + rcs_clock = clockrate(); + igt_info("RCS timestamp clock: %.3fKHz, %.1fns\n", + rcs_clock / 1e3, 1e9 / rcs_clock); + rcs_clock = 1e9 / rcs_clock; } igt_subtest("all-rtidle-submit") -- 2.20.1 _______________________________________________ igt-dev mailing list igt-dev@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/igt-dev
next reply other threads:[~2019-01-29 8:52 UTC|newest] Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-01-29 8:52 Chris Wilson [this message] 2019-01-29 8:52 ` [igt-dev] [PATCH i-g-t] i915/gem_exec_latency: Normalize results into ns Chris Wilson 2019-01-29 9:36 ` [igt-dev] ✓ Fi.CI.BAT: success for " Patchwork 2019-01-29 11:10 ` [igt-dev] ✓ Fi.CI.IGT: " Patchwork
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