linux-kernel - [PATCH] perf c2c: Fix report with offline cpus

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Message-Id: <20190822085045.25108-1-ravi.bangoria@linux.ibm.com>
Date:   Thu, 22 Aug 2019 14:20:45 +0530
From:   Ravi Bangoria <ravi.bangoria@...ux.ibm.com>
To:     acme@...nel.org, jolsa@...hat.com
Cc:     linux-kernel@...r.kernel.org,
        Ravi Bangoria <ravi.bangoria@...ux.ibm.com>,
        Nageswara R Sastry <nasastry@...ibm.com>
Subject: [PATCH] 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.

Fixes: 1e181b92a2da ("perf c2c report: Add 'node' sort key")
Reported-by: Nageswara R Sastry <nasastry@...ibm.com>
Signed-off-by: Ravi Bangoria <ravi.bangoria@...ux.ibm.com>
---
 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 9e6cc86..fc68a94 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)
-- 
1.8.3.1