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authorThomas Richter <tmricht@linux.ibm.com>2020-07-29 16:53:14 +0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2020-07-31 15:27:32 +0300
commit463538a383a27337cb83ae195e432a839a52d639 (patch)
tree2d8c575903577281417643e746a873c8f1a0eace
parente24c6447ccb7b1a01f9bf0aec94939e6450c0b4d (diff)
downloadlinux-463538a383a27337cb83ae195e432a839a52d639.tar.xz
perf tests: Fix test 68 zstd compression for s390
Commit 5aa98879efe7 ("s390/cpum_sf: prohibit callchain data collection") prohibits call graph sampling for hardware events on s390. The information recorded is out of context and does not match. On s390 this commit now breaks test case 68 Zstd perf.data compression/decompression. Therefore omit call graph sampling on s390 in this test. Output before: [root@t35lp46 perf]# ./perf test -Fv 68 68: Zstd perf.data compression/decompression : --- start --- Collecting compressed record file: Error: cycles: PMU Hardware doesn't support sampling/overflow-interrupts. Try 'perf stat' ---- end ---- Zstd perf.data compression/decompression: FAILED! [root@t35lp46 perf]# Output after: [root@t35lp46 perf]# ./perf test -Fv 68 68: Zstd perf.data compression/decompression : --- start --- Collecting compressed record file: 500+0 records in 500+0 records out 256000 bytes (256 kB, 250 KiB) copied, 0.00615638 s, 41.6 MB/s [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.004 MB /tmp/perf.data.X3M, compressed (original 0.002 MB, ratio is 3.609) ] Checking compressed events stats: # compressed : Zstd, level = 1, ratio = 4 COMPRESSED events: 1 2ELIFREPh---- end ---- Zstd perf.data compression/decompression: Ok [root@t35lp46 perf]# Signed-off-by: Thomas Richter <tmricht@linux.ibm.com> Reviewed-by: Sumanth Korikkar <sumanthk@linux.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Sven Schnelle <svens@linux.ibm.com> Cc: Vasily Gorbik <gor@linux.ibm.com> Link: http://lore.kernel.org/lkml/20200729135314.91281-1-tmricht@linux.ibm.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
-rwxr-xr-xtools/perf/tests/shell/record+zstd_comp_decomp.sh3
1 files changed, 2 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 63a91ec473bb..045723b3d992 100755
--- a/tools/perf/tests/shell/record+zstd_comp_decomp.sh
+++ b/tools/perf/tests/shell/record+zstd_comp_decomp.sh
@@ -12,7 +12,8 @@ skip_if_no_z_record() {
collect_z_record() {
echo "Collecting compressed record file:"
- $perf_tool record -o $trace_file -g -z -F 5000 -- \
+ [[ "$(uname -m)" != s390x ]] && gflag='-g'
+ $perf_tool record -o $trace_file $gflag -z -F 5000 -- \
dd count=500 if=/dev/urandom of=/dev/null
}