The following commit has been merged into the perf/core branch of tip: Commit-ID: d93fc7ac88c7347d1c31ca158d1466d1ce2097e1 Gitweb: https://git.kernel.org/tip/d93fc7ac88c7347d1c31ca158d1466d1ce2097e1 Author: James Clark <[email protected]> AuthorDate: Thu, 22 Aug 2019 13:55:15 Committer: Arnaldo Carvalho de Melo <[email protected]> CommitterDate: Mon, 26 Aug 2019 11:58:29 -03:00
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 <[email protected]> Cc: Alexander Shishkin <[email protected]> Cc: Alexey Budankov <[email protected]> Cc: Jeremy Linton <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: Namhyung Kim <[email protected]> Cc: Peter Zijlstra <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]> --- tools/perf/tests/shell/record+zstd_comp_decomp.sh | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/perf/tests/shell/record+zstd_comp_decomp.sh b/tools/perf/tests/shell/record+zstd_comp_decomp.sh index 899604d..63a91ec 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() {
