perf c2c: Fix c2c report for empty numa node
authorJiri Olsa <jolsa@redhat.com>
Tue, 5 Mar 2019 15:25:29 +0000 (16:25 +0100)
committerArnaldo Carvalho de Melo <acme@redhat.com>
Wed, 6 Mar 2019 21:15:24 +0000 (18:15 -0300)
commite34c940245437f36d2c492edd1f8237eff391064
tree5a54c17399241a68fea8b75e50babb710b25fdca
parentfdf2460c297f1bb2f3bd20b3b52903b267af9050
perf c2c: Fix c2c report for empty numa node

Ravi Bangoria reported that we fail with an empty NUMA node with the
following message:

  $ lscpu
  NUMA node0 CPU(s):
  NUMA node1 CPU(s):   0-4

  $ sudo ./perf c2c report
  node/cpu topology bugFailed setup nodes

Fix this by detecting the empty node and keeping its CPU set empty.

Reported-by: Nageswara R Sastry <nasastry@in.ibm.com>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jonas Rabenstein <jonas.rabenstein@studium.uni-erlangen.de>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20190305152536.21035-2-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
tools/perf/builtin-c2c.c