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| author | James Clark <James.Clark@arm.com> | 2019-08-22 16:55:15 +0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2019-08-26 17:58:29 +0300 |
| commit | d93fc7ac88c7347d1c31ca158d1466d1ce2097e1 (patch) | |
| tree | 959f342e236c88773d382e56411d665c7e9b7078 | |
| parent | 185bcb92c80eae2d85ec834ea76a144fd163e2af (diff) | |
| download | linux-d93fc7ac88c7347d1c31ca158d1466d1ce2097e1.tar.xz | |
perf tests: Fixes hang in zstd compression test by changing the source of random data
Running 'perf test' with zstd compression linked will hang at the test
'Zstd perf.data compression/decompression' because /dev/random blocks
reads until there is enough entropy. This means that the test will
appear to never complete unless the mouse is continually moved while
running it.
Signed-off-by: James Clark <james.clark@arm.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexey Budankov <alexey.budankov@linux.intel.com>
Cc: Jeremy Linton <jeremy.linton@arm.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/3d8cc701-df4e-f949-1715-5118b530e990@arm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| -rwxr-xr-x | tools/perf/tests/shell/record+zstd_comp_decomp.sh | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/perf/tests/shell/record+zstd_comp_decomp.sh b/tools/perf/tests/shell/record+zstd_comp_decomp.sh index 899604d17b85..63a91ec473bb 100755 --- a/tools/perf/tests/shell/record+zstd_comp_decomp.sh +++ b/tools/perf/tests/shell/record+zstd_comp_decomp.sh @@ -13,7 +13,7 @@ skip_if_no_z_record() { collect_z_record() { echo "Collecting compressed record file:" $perf_tool record -o $trace_file -g -z -F 5000 -- \ - dd count=500 if=/dev/random of=/dev/null + dd count=500 if=/dev/urandom of=/dev/null } check_compressed_stats() { |