This commit introduces a frequency check mechanism aimed at ensuring the accuracy of energy readings.
v2 : Improved commit message Signed-off-by: Anirban Sk <[email protected]> --- drivers/gpu/drm/i915/gt/selftest_rc6.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/gpu/drm/i915/gt/selftest_rc6.c b/drivers/gpu/drm/i915/gt/selftest_rc6.c index 1aa1446c8fb0..b3602328c832 100644 --- a/drivers/gpu/drm/i915/gt/selftest_rc6.c +++ b/drivers/gpu/drm/i915/gt/selftest_rc6.c @@ -12,6 +12,7 @@ #include "selftests/i915_random.h" #include "selftests/librapl.h" +#include "intel_rps.h" static u64 rc6_residency(struct intel_rc6 *rc6) { @@ -38,6 +39,8 @@ int live_rc6_manual(void *arg) ktime_t dt; u64 res[2]; int err = 0; + u32 rc0_freq, rc6_freq; + struct intel_rps *rps = >->rps; /* * Our claim is that we can "encourage" the GPU to enter rc6 at will. @@ -66,6 +69,7 @@ int live_rc6_manual(void *arg) rc0_power = librapl_energy_uJ() - rc0_power; dt = ktime_sub(ktime_get(), dt); res[1] = rc6_residency(rc6); + rc0_freq = intel_rps_read_actual_frequency(rps); if ((res[1] - res[0]) >> 10) { pr_err("RC6 residency increased by %lldus while disabled for 1000ms!\n", (res[1] - res[0]) >> 10); @@ -91,6 +95,7 @@ int live_rc6_manual(void *arg) dt = ktime_get(); rc6_power = librapl_energy_uJ(); msleep(100); + rc6_freq = intel_rps_read_actual_frequency(rps); rc6_power = librapl_energy_uJ() - rc6_power; dt = ktime_sub(ktime_get(), dt); res[1] = rc6_residency(rc6); @@ -109,6 +114,7 @@ int live_rc6_manual(void *arg) rc0_power, rc6_power); if (2 * rc6_power > rc0_power) { pr_err("GPU leaked energy while in RC6!\n"); + pr_info("GPU Freq: %u in RC6 and %u in RC0\n", rc6_freq, rc0_freq); err = -EINVAL; goto out_unlock; } -- 2.34.1
