>From b6bb5d9182f89cd7c6f1eff3cd5a6d3f947b8b0c Mon Sep 17 00:00:00 2001
From: Sukadev Bhattiprolu <[email protected]>
Date: Thu, 3 Dec 2015 18:26:40 -0500
Subject: [PATCH 1/1] perf: Remove 'core_id' check in topo test
The topology test case of 'perf test' seems to be broken on my x86
system - due to the comparison of a "core-id" with # of CPUs online.
There are 8 online CPUs:
$ cat /sys/devices/system/cpu/online
0-7
but core-ids are not sequential and some core-ids exceed the number
of online CPUs.
$ cat /sys/devices/system/cpu/cpu?/topology/core_id
0
1
9
10
0
1
9
10
Looks like we can safely remove the check. Output before:
$ ./perf --version
perf version 4.4.rc1.g34258a
$ ./perf test -v topo
36: Test topology in session :
--- start ---
test child forked, pid 5906
templ file: /tmp/perf-test-vCwWG3
core_id number is too big.You may need to upgrade the perf tool.
test child interrupted
---- end ----
Test topology in session: FAILED!
and after:
./perf test -v topo
36: Test topology in session :
--- start ---
test child forked, pid 6532
templ file: /tmp/perf-test-y10wFJ
CPU 0, core 0, socket 0
CPU 1, core 1, socket 0
CPU 2, core 9, socket 0
CPU 3, core 10, socket 0
CPU 4, core 0, socket 1
CPU 5, core 1, socket 1
CPU 6, core 9, socket 1
CPU 7, core 10, socket 1
test child finished with 0
---- end ----
Test topology in session: Ok
Signed-off-by: Sukadev Bhattiprolu <[email protected]>
Cc: [email protected]
Cc: Jiri Olsa <[email protected]>
---
tools/perf/util/header.c | 5 -----
1 file changed, 5 deletions(-)
diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index 4383800..e74f94d 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -1652,11 +1652,6 @@ static int process_cpu_topology(struct perf_file_section
*section,
if (ph->needs_swap)
nr = bswap_32(nr);
- if (nr > (u32)cpu_nr) {
- pr_debug("core_id number is too big."
- "You may need to upgrade the perf tool.\n");
- goto free_cpu;
- }
ph->env.cpu[i].core_id = nr;
ret = readn(fd, &nr, sizeof(nr));
--
2.1.0
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