diff options
Diffstat (limited to 'drivers/gpu/drm/i915/gt/selftest_rc6.c')
| -rw-r--r-- | drivers/gpu/drm/i915/gt/selftest_rc6.c | 59 |
1 files changed, 45 insertions, 14 deletions
diff --git a/drivers/gpu/drm/i915/gt/selftest_rc6.c b/drivers/gpu/drm/i915/gt/selftest_rc6.c index 1aa1446c8fb0..41716ed454b7 100644 --- a/drivers/gpu/drm/i915/gt/selftest_rc6.c +++ b/drivers/gpu/drm/i915/gt/selftest_rc6.c @@ -8,6 +8,7 @@ #include "intel_gpu_commands.h" #include "intel_gt_requests.h" #include "intel_ring.h" +#include "intel_rps.h" #include "selftest_rc6.h" #include "selftests/i915_random.h" @@ -32,12 +33,22 @@ int live_rc6_manual(void *arg) { struct intel_gt *gt = arg; struct intel_rc6 *rc6 = >->rc6; - u64 rc0_power, rc6_power; + struct intel_rps *rps = >->rps; intel_wakeref_t wakeref; + u64 rc0_sample_energy[2]; + u64 rc6_sample_energy[2]; + u64 sleep_time = 1000; + u32 rc0_freq = 0; + u32 rc6_freq = 0; + u64 rc0_power; + u64 rc6_power; bool has_power; + u64 threshold; ktime_t dt; u64 res[2]; int err = 0; + u64 diff; + /* * Our claim is that we can "encourage" the GPU to enter rc6 at will. @@ -56,16 +67,18 @@ int live_rc6_manual(void *arg) /* Force RC6 off for starters */ __intel_rc6_disable(rc6); - msleep(1); /* wakeup is not immediate, takes about 100us on icl */ + /* wakeup is not immediate, takes about 100us on icl */ + usleep_range(1000, 2000); res[0] = rc6_residency(rc6); dt = ktime_get(); - rc0_power = librapl_energy_uJ(); - msleep(1000); - rc0_power = librapl_energy_uJ() - rc0_power; + rc0_sample_energy[0] = librapl_energy_uJ(); + msleep(sleep_time); + rc0_sample_energy[1] = librapl_energy_uJ() - rc0_sample_energy[0]; dt = ktime_sub(ktime_get(), dt); res[1] = rc6_residency(rc6); + rc0_freq = intel_rps_read_actual_frequency_fw(rps); if ((res[1] - res[0]) >> 10) { pr_err("RC6 residency increased by %lldus while disabled for 1000ms!\n", (res[1] - res[0]) >> 10); @@ -74,10 +87,15 @@ int live_rc6_manual(void *arg) } if (has_power) { - rc0_power = div64_u64(NSEC_PER_SEC * rc0_power, + rc0_power = div64_u64(NSEC_PER_SEC * rc0_sample_energy[1], ktime_to_ns(dt)); + if (!rc0_power) { - pr_err("No power measured while in RC0\n"); + if (rc0_freq) + pr_debug("No power measured while in RC0! GPU Freq: %uMHz in RC0\n", + rc0_freq); + else + pr_err("No power and freq measured while in RC0\n"); err = -EINVAL; goto out_unlock; } @@ -89,9 +107,10 @@ int live_rc6_manual(void *arg) res[0] = rc6_residency(rc6); intel_uncore_forcewake_flush(rc6_to_uncore(rc6), FORCEWAKE_ALL); dt = ktime_get(); - rc6_power = librapl_energy_uJ(); - msleep(100); - rc6_power = librapl_energy_uJ() - rc6_power; + rc6_sample_energy[0] = librapl_energy_uJ(); + msleep(sleep_time); + rc6_freq = intel_rps_read_actual_frequency_fw(rps); + rc6_sample_energy[1] = librapl_energy_uJ() - rc6_sample_energy[0]; dt = ktime_sub(ktime_get(), dt); res[1] = rc6_residency(rc6); if (res[1] == res[0]) { @@ -103,12 +122,24 @@ int live_rc6_manual(void *arg) } if (has_power) { - rc6_power = div64_u64(NSEC_PER_SEC * rc6_power, + rc6_power = div64_u64(NSEC_PER_SEC * rc6_sample_energy[1], ktime_to_ns(dt)); - pr_info("GPU consumed %llduW in RC0 and %llduW in RC6\n", + pr_info("GPU consumed %lluuW in RC0 and %lluuW in RC6\n", rc0_power, rc6_power); + if (2 * rc6_power > rc0_power) { - pr_err("GPU leaked energy while in RC6!\n"); + pr_err("GPU leaked energy while in RC6!\n" + "GPU Freq: %uMHz in RC6 and %uMHz in RC0\n" + "RC0 energy before & after sleep respectively: %lluuJ %lluuJ\n" + "RC6 energy before & after sleep respectively: %lluuJ %lluuJ\n", + rc6_freq, rc0_freq, rc0_sample_energy[0], rc0_sample_energy[1], + rc6_sample_energy[0], rc6_sample_energy[1]); + + diff = res[1] - res[0]; + threshold = (9 * NSEC_PER_MSEC * sleep_time) / 10; + if (diff < threshold) + pr_err("Did not enter RC6 properly, RC6 start residency=%lluns, RC6 end residency=%lluns\n", + res[0], res[1]); err = -EINVAL; goto out_unlock; } @@ -211,7 +242,7 @@ int live_rc6_ctx_wa(void *arg) i915_reset_engine_count(error, engine); const u32 *res; - /* Use a sacrifical context */ + /* Use a sacrificial context */ ce = intel_context_create(engine); if (IS_ERR(ce)) { err = PTR_ERR(ce); |