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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2015-10-30 15:01:33 +0000 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2015-10-30 15:04:55 +0000 |
| commit | 9024a72d29150f05e2ad62aa088d19a662bbf815 (patch) | |
| tree | 5dbca8425f4816d990bfec298d4fee99bded0ddb /benchmarks/.gitignore | |
| parent | fe548fab0a63f95b729f0df4137753212e75375e (diff) | |
benchmark/gem_wait: poc for benchmarking i915_wait_request overhead
One scenario under recent discussion is that of having a thundering herd
in i915_wait_request - where the overhead of waking up every waiter for
every batchbuffer was significantly impacting customer throughput. This
benchmark tries to replicate something to that effect by having a large
number of consumers generating a busy load (a large copy followed by
lots of small copies to generate lots of interrupts) and tries to wait
upon all the consumers concurrenctly (to reproduce the thundering herd
effect). To measure the overhead, we have a bunch of cpu hogs - less
kernel overhead in waiting should allow more CPU throughput.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Diffstat (limited to 'benchmarks/.gitignore')
| -rw-r--r-- | benchmarks/.gitignore | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/benchmarks/.gitignore b/benchmarks/.gitignore index 3937d46b..67afa18c 100644 --- a/benchmarks/.gitignore +++ b/benchmarks/.gitignore @@ -7,6 +7,7 @@ gem_exec_trace gem_mmap gem_prw gem_userptr_benchmark +gem_wait intel_upload_blit_large intel_upload_blit_large_gtt intel_upload_blit_large_map |