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* [igt-dev] [PATCH i-g-t] i915/i915_power: Measure GPU idle/busy power
@ 2023-01-17 19:03 Ashutosh Dixit
  2023-01-17 20:54 ` [igt-dev] ✓ Fi.CI.BAT: success for " Patchwork
                   ` (2 more replies)
  0 siblings, 3 replies; 8+ messages in thread
From: Ashutosh Dixit @ 2023-01-17 19:03 UTC (permalink / raw)
  To: igt-dev; +Cc: Badal Nilawar

In several instances (e.g. when investigating GPU power limits) it is very
useful to be able to measure GPU power easily. Since we already have all
ingredients for doing so, add a couple of tests to measure GPU power when
idle and power under load.

Signed-off-by: Ashutosh Dixit <ashutosh.dixit@intel.com>
---
 tests/i915/i915_power.c | 60 +++++++++++++++++++++++++++++++++++++++++
 tests/meson.build       |  1 +
 2 files changed, 61 insertions(+)
 create mode 100644 tests/i915/i915_power.c

diff --git a/tests/i915/i915_power.c b/tests/i915/i915_power.c
new file mode 100644
index 00000000000..74c5a4ba4af
--- /dev/null
+++ b/tests/i915/i915_power.c
@@ -0,0 +1,60 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2022 Intel Corporation
+ */
+
+#include "igt.h"
+#include "i915/gem.h"
+#include "igt_power.h"
+
+IGT_TEST_DESCRIPTION("i915 power measurement/tests");
+
+static void measure_power(int i915, const char *domain, bool load)
+{
+	const intel_ctx_t *ctx = intel_ctx_create_all_physical(i915);
+	struct power_sample sample[2];
+	int sleep_duration_sec = 3;
+	struct igt_power pwr;
+	igt_spin_t *spin;
+
+	gem_quiescent_gpu(i915);
+	if (load) {
+		spin = igt_spin_new(i915, .ctx = ctx, .engine = ALL_ENGINES,
+				    .flags = IGT_SPIN_POLL_RUN);
+		/* Wait till at least one spinner starts */
+		igt_spin_busywait_until_started(spin);
+	}
+
+	igt_require(!igt_power_open(i915, &pwr, domain));
+	igt_power_get_energy(&pwr, &sample[0]);
+	usleep(sleep_duration_sec * USEC_PER_SEC);
+	igt_power_get_energy(&pwr, &sample[1]);
+	igt_info("Measured power: %g mW\n", igt_power_get_mW(&pwr, &sample[0], &sample[1]));
+
+	igt_power_close(&pwr);
+	igt_free_spins(i915);
+	intel_ctx_destroy(i915, ctx);
+}
+
+igt_main
+{
+	int i915;
+
+	igt_fixture {
+		i915 = drm_open_driver_master(DRIVER_INTEL);
+	}
+
+	igt_describe("Measure idle gpu power");
+	igt_subtest("gpu-idle") {
+		measure_power(i915, "gpu", false);
+	}
+
+	igt_describe("Measure gpu power with load");
+	igt_subtest("gpu-busy") {
+		measure_power(i915, "gpu", true);
+	}
+
+	igt_fixture {
+		close(i915);
+	}
+}
diff --git a/tests/meson.build b/tests/meson.build
index e20a864035b..e0f41e9e6a1 100644
--- a/tests/meson.build
+++ b/tests/meson.build
@@ -212,6 +212,7 @@ i915_progs = [
 	'i915_pm_dc',
 	'i915_pm_rps',
 	'i915_pm_sseu',
+	'i915_power',
 	'i915_query',
 	'i915_selftest',
 	'i915_suspend',
-- 
2.38.0

^ permalink raw reply related	[flat|nested] 8+ messages in thread
end of thread, other threads:[~2023-01-23  5:46 UTC | newest]

Thread overview: 8+ messages (download: mbox.gz follow: Atom feed
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2023-01-17 19:03 [igt-dev] [PATCH i-g-t] i915/i915_power: Measure GPU idle/busy power Ashutosh Dixit
2023-01-17 20:54 ` [igt-dev] ✓ Fi.CI.BAT: success for " Patchwork
2023-01-18  6:30 ` [igt-dev] [PATCH i-g-t] " Gupta, Anshuman
2023-01-18  7:22   ` Tauro, Riana
2023-01-19  3:32     ` Dixit, Ashutosh
2023-01-23  5:46       ` Tauro, Riana
2023-01-19  5:07   ` Dixit, Ashutosh
2023-01-18 10:29 ` [igt-dev] ✓ Fi.CI.IGT: success for " Patchwork

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