[PATCH 4.17 114/324] perf test session topology: Fix test on s390

From: Greg Kroah-Hartman
Date: Thu Aug 23 2018 - 04:49:24 EST

4.17-stable review patch. If anyone has any objections, please let me know.


From: Thomas Richter <tmricht@xxxxxxxxxxxxx>

[ Upstream commit b930e62ecd362843002bdf84c2940439822af321 ]

On s390 this test case fails because the socket identifiction numbers
assigned to the CPU are higher than the CPU identification numbers.

F/ix this by adding the platform architecture into the perf data header
flag information. This helps identifiing the test platform and handles
s390 specifics in process_cpu_topology().


[root@p23lp27 perf]# perf test -vvvvv -F 39
39: Session topology :
--- start ---
templ file: /tmp/perf-test-iUv755
socket_id number is too big.You may need to upgrade the perf tool.
---- end ----
Session topology: Skip
[root@p23lp27 perf]#


[root@p23lp27 perf]# perf test -vvvvv -F 39
39: Session topology :
--- start ---
templ file: /tmp/perf-test-8X8VTs
CPU 0, core 0, socket 6
CPU 1, core 1, socket 3
---- end ----
Session topology: Ok
[root@p23lp27 perf]#

Signed-off-by: Thomas Richter <tmricht@xxxxxxxxxxxxx>
Reviewed-by: Hendrik Brueckner <brueckner@xxxxxxxxxxxxx>
Cc: Heiko Carstens <heiko.carstens@xxxxxxxxxx>
Cc: Martin Schwidefsky <schwidefsky@xxxxxxxxxx>
Fixes: c84974ed9fb6 ("perf test: Add entry to test cpu topology")
Link: http://lkml.kernel.org/r/20180611073153.15592-2-tmricht@xxxxxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
tools/perf/tests/topology.c | 1 +
1 file changed, 1 insertion(+)

--- a/tools/perf/tests/topology.c
+++ b/tools/perf/tests/topology.c
@@ -45,6 +45,7 @@ static int session_write_header(char *pa

perf_header__set_feat(&session->header, HEADER_CPU_TOPOLOGY);
perf_header__set_feat(&session->header, HEADER_NRCPUS);
+ perf_header__set_feat(&session->header, HEADER_ARCH);

session->header.data_size += DATA_SIZE;