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// SPDX-License-Identifier: MIT
/*
* Copyright © 2023 Intel Corporation
*/
#include "igt.h"
#include "i915/gem.h"
#include "igt_power.h"
#include "igt_sysfs.h"
/**
* TEST: i915 power
* Description: i915 power measurement tests
* Category: Core
* Mega feature: Power management
* Sub-category: Power management tests
* Functionality: hwmon
* Feature: hwmon
* Test category: GEM_Legacy
*
* SUBTEST: sanity
* Description: Sanity check gpu power measurement
*/
IGT_TEST_DESCRIPTION("i915 power measurement tests");
static double measure_power(struct igt_power *pwr, uint32_t duration_sec)
{
struct power_sample sample[2];
igt_power_get_energy(pwr, &sample[0]);
usleep(duration_sec * USEC_PER_SEC);
igt_power_get_energy(pwr, &sample[1]);
return igt_power_get_mW(pwr, &sample[0], &sample[1]);
}
static void sanity(int i915)
{
const intel_ctx_t *ctx;
struct igt_power pwr;
double idle, busy;
igt_spin_t *spin;
uint64_t ahnd;
int dir, gt;
uint32_t req = 0, act = 0;
#define DURATION_SEC 2
/* Idle power */
igt_require(!igt_power_open(i915, &pwr, "gpu"));
gem_quiescent_gpu(i915);
idle = measure_power(&pwr, DURATION_SEC);
igt_info("Measured idle power: %g mW\n", idle);
/* Busy power */
ctx = intel_ctx_create_all_physical(i915);
ahnd = get_reloc_ahnd(i915, ctx->id);
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);
busy = measure_power(&pwr, DURATION_SEC);
i915_for_each_gt(i915, dir, gt) {
__igt_sysfs_get_u32(dir, "rps_cur_freq_mhz", &req);
__igt_sysfs_get_u32(dir, "rps_act_freq_mhz", &act);
igt_info("gt %d: req MHz: %u, act MHz: %u\n", gt, req, act);
}
igt_free_spins(i915);
put_ahnd(ahnd);
intel_ctx_destroy(i915, ctx);
igt_power_close(&pwr);
igt_info("Measured busy power: %g mW\n", busy);
igt_assert(idle >= 0 && busy > 0 && busy > idle);
}
igt_main
{
int i915;
igt_fixture {
igt_skip_on_simulation();
i915 = drm_open_driver_master(DRIVER_INTEL);
}
igt_describe("Sanity check gpu power measurement");
igt_subtest("sanity") {
sanity(i915);
}
igt_fixture {
drm_close_driver(i915);
}
}
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