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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2016-09-08 14:50:32 +0100 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2016-09-08 14:54:04 +0100 |
| commit | 61b19a4b8f68d4cf82382f7776c740311b9d0be0 (patch) | |
| tree | 140c40c2be030e57759555d9575b1db5f802e18e /tests | |
| parent | 4cce7155c09dbd6c262dc0251dacc99ff3267be7 (diff) | |
igt/gem_exec_nop: Refine the target calculation
The ideal execution time cannot be faster than the fastest ring! If all
other rings were infinitely fast, the seed would be max/nengine. Given
each is finite, this puts a floor on the ideal execution time.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Diffstat (limited to 'tests')
| -rw-r--r-- | tests/gem_exec_nop.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/tests/gem_exec_nop.c b/tests/gem_exec_nop.c index 451cb477..f4f7a0fa 100644 --- a/tests/gem_exec_nop.c +++ b/tests/gem_exec_nop.c @@ -252,7 +252,7 @@ static void series(int fd, uint32_t handle, int timeout) time = elapsed(&start, &now) / count; igt_info("All (%d engines): %'lu cycles, average %.3fus per cycle [expected ideal %.3fus]\n", - nengine, count, 1e6*time, 1e6*max/nengine); + nengine, count, 1e6*time, 1e6*((max-min)/nengine+min)); /* The rate limiting step should be how fast the slowest engine can * execute its queue of requests, as when we wait upon a full ring all |