[tip: perf/core] perf c2c: Fix report with offline cpus

[tip-bot2 for Ravi Bangoria]

The following commit has been merged into the perf/core branch of tip:

Commit-ID:     1ea770f6c1971bc101b3741f4d88b0b4ea5c4181
Gitweb:        https://git.kernel.org/tip/1ea770f6c1971bc101b3741f4d88b0b4ea5c4181
Author:        Ravi Bangoria <ravi.bangoria@xxxxxxxxxxxxx>
AuthorDate:    Thu, 22 Aug 2019 14:20:45 +05:30
Committer:     Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitterDate: Thu, 22 Aug 2019 17:16:57 -03:00

perf c2c: Fix report with offline cpus

If c2c is recorded on a machine where any cpus are offline, 'perf c2c
report' throws an error "node/cpu topology bugFailed setup nodes".

It fails because while preparing node-cpu mapping we don't consider
offline cpus.

Reported-by: Nageswara R Sastry <nasastry@xxxxxxxxxx>
Signed-off-by: Ravi Bangoria <ravi.bangoria@xxxxxxxxxxxxx>
Acked-by: Jiri Olsa <jolsa@xxxxxxxxxx>
Fixes: 1e181b92a2da ("perf c2c report: Add 'node' sort key")
Link: http://lkml.kernel.org/r/20190822085045.25108-1-ravi.bangoria@xxxxxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
 tools/perf/builtin-c2c.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/builtin-c2c.c b/tools/perf/builtin-c2c.c
index 01629f5..2111437 100644
--- a/tools/perf/builtin-c2c.c
+++ b/tools/perf/builtin-c2c.c
@@ -2027,7 +2027,7 @@ static int setup_nodes(struct perf_session *session)
 		c2c.node_info = 2;
 
 	c2c.nodes_cnt = session->header.env.nr_numa_nodes;
-	c2c.cpus_cnt  = session->header.env.nr_cpus_online;
+	c2c.cpus_cnt  = session->header.env.nr_cpus_avail;
 
 	n = session->header.env.numa_nodes;
 	if (!n)