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authorSukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>2015-12-03 18:26:40 -0500
committerArnaldo Carvalho de Melo <acme@redhat.com>2016-03-11 13:45:04 -0300
commit4c9d6c18fdebfcfb18918a656355a3c7c3d45e13 (patch)
treec171a08ba533f1a85bf30affe758e229d4ec5ac5 /tools
parentced30bc9129777d715057d06fc8dbdfd3b81e94d (diff)
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perf test: 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 <sukadev@linux.vnet.ibm.com> Cc: Jan Stancek <jstancek@redhat.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Kan Liang <kan.liang@intel.com> Link: http://lkml.kernel.org/r/20151203233219.GA27696@us.ibm.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools')
-rw-r--r--tools/perf/util/header.c5
1 files changed, 0 insertions, 5 deletions
diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index 73e38e472ecd..90680ec9f8b8 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -1872,11 +1872,6 @@ 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));