[PATCH i-g-t 1/2] i915/i915_power: Sanity check power measurement
Ashutosh Dixit
ashutosh.dixit at intel.com
Sat Jan 21 04:39:07 UTC 2023
Add a test to sanity check power measurement on integrated/discrete by
requiring power under load to be >= idle power.
Signed-off-by: Ashutosh Dixit <ashutosh.dixit at intel.com>
---
tests/i915/i915_power.c | 73 +++++++++++++++++++++++++++++++++++++++++
tests/meson.build | 1 +
2 files changed, 74 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..4b41f33649e
--- /dev/null
+++ b/tests/i915/i915_power.c
@@ -0,0 +1,73 @@
+// 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 double power(int i915, const char *domain, bool load)
+{
+ const intel_ctx_t *ctx = intel_ctx_create_all_physical(i915);
+ uint64_t ahnd = get_reloc_ahnd(i915, ctx->id);
+ struct power_sample sample[2];
+ int sleep_duration_sec = 2;
+ struct igt_power pwr;
+ igt_spin_t *spin;
+ double mW;
+
+ gem_quiescent_gpu(i915);
+ if (load) {
+ spin = igt_spin_new(i915, .ahnd = ahnd, .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]);
+
+ mW = igt_power_get_mW(&pwr, &sample[0], &sample[1]);
+ igt_info("Domain: %s, Load: %d, Measured power: %g mW\n", domain, load, mW);
+
+ igt_power_close(&pwr);
+ igt_free_spins(i915);
+ put_ahnd(ahnd);
+ intel_ctx_destroy(i915, ctx);
+
+ return mW;
+}
+
+static void sanity(int i915, const char *domain)
+{
+ double idle, busy;
+
+ idle = power(i915, domain, false);
+ busy = power(i915, domain, true);
+
+ igt_assert(busy >= idle);
+}
+
+igt_main
+{
+ int i915;
+
+ igt_fixture {
+ i915 = drm_open_driver_master(DRIVER_INTEL);
+ }
+
+ igt_describe("Sanity check power measurement");
+ igt_subtest("sanity") {
+ sanity(i915, "gpu");
+ }
+
+ 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
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