From: Chris Wilson <chris@chris-wilson.co.uk>
To: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>,
igt-dev@lists.freedesktop.org
Cc: Intel-gfx@lists.freedesktop.org
Subject: Re: [Intel-gfx] [PATCH i-g-t] tests/i915/perf_pmu: Subtest to measure sampling error for 100% busy
Date: Tue, 16 Feb 2021 11:44:59 +0000 [thread overview]
Message-ID: <161347589981.27357.8341340005305875705@build.alporthouse.com> (raw)
In-Reply-To: <20210216105050.309803-1-tvrtko.ursulin@linux.intel.com>
Quoting Tvrtko Ursulin (2021-02-16 10:50:50)
> From: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
>
> Test that periodic reads of engine busyness against a constant 100% load
> are within the 5000ppm tolerance when comparing perf timestamp versus
> counter values.
We've previously only included the accuracy tests on platforms that
claim to be accurate. Can we rephrase the goal of the test such that it
sounds more like a universal truth that should also be valid for the
sampling backends? "The busyness should never exceed 100% (within a
margin of error)..." And since accuracy is currently protected by
has_busy_stats, let's try to find a different name.
-Chris
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Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx
WARNING: multiple messages have this Message-ID (diff)
From: Chris Wilson <chris@chris-wilson.co.uk>
To: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>,
igt-dev@lists.freedesktop.org
Cc: Intel-gfx@lists.freedesktop.org
Subject: Re: [igt-dev] [Intel-gfx] [PATCH i-g-t] tests/i915/perf_pmu: Subtest to measure sampling error for 100% busy
Date: Tue, 16 Feb 2021 11:44:59 +0000 [thread overview]
Message-ID: <161347589981.27357.8341340005305875705@build.alporthouse.com> (raw)
In-Reply-To: <20210216105050.309803-1-tvrtko.ursulin@linux.intel.com>
Quoting Tvrtko Ursulin (2021-02-16 10:50:50)
> From: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
>
> Test that periodic reads of engine busyness against a constant 100% load
> are within the 5000ppm tolerance when comparing perf timestamp versus
> counter values.
We've previously only included the accuracy tests on platforms that
claim to be accurate. Can we rephrase the goal of the test such that it
sounds more like a universal truth that should also be valid for the
sampling backends? "The busyness should never exceed 100% (within a
margin of error)..." And since accuracy is currently protected by
has_busy_stats, let's try to find a different name.
-Chris
_______________________________________________
igt-dev mailing list
igt-dev@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/igt-dev
next prev parent reply other threads:[~2021-02-16 11:45 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-16 10:50 [Intel-gfx] [PATCH i-g-t] tests/i915/perf_pmu: Subtest to measure sampling error for 100% busy Tvrtko Ursulin
2021-02-16 10:50 ` [igt-dev] " Tvrtko Ursulin
2021-02-16 11:39 ` [igt-dev] ✓ Fi.CI.BAT: success for " Patchwork
2021-02-16 11:44 ` Chris Wilson [this message]
2021-02-16 11:44 ` [igt-dev] [Intel-gfx] [PATCH i-g-t] " Chris Wilson
2021-02-16 12:40 ` [igt-dev] ✗ Fi.CI.IGT: failure for " Patchwork
2021-02-16 12:47 ` [Intel-gfx] [PATCH i-g-t] " Chris Wilson
2021-02-16 12:47 ` [igt-dev] " Chris Wilson
2021-02-16 12:49 ` Chris Wilson
2021-02-16 12:49 ` [igt-dev] " Chris Wilson
2021-02-16 15:59 ` Tvrtko Ursulin
2021-02-16 15:59 ` [igt-dev] " Tvrtko Ursulin
2021-02-16 17:53 ` Chris Wilson
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