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Message-Id: <1438582560-13352-1-git-send-email-shreyas@linux.vnet.ibm.com>
Date: Mon, 3 Aug 2015 11:46:00 +0530
From: "Shreyas B. Prabhu" <shreyas@...ux.vnet.ibm.com>
To: rjw@...ysocki.net, trenn@...e.com
Cc: linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
pavsubra@...ux.vnet.ibm.com,
"Shreyas B. Prabhu" <shreyas@...ux.vnet.ibm.com>
Subject: [PATCH] cpupower tools: Fix error when running cpupower monitor
get_cpu_topology() tries to get topology info from all cpus by reading
files in the topology sysfs dir. If a cpu is offlined, since it doesn't
have topology dir, this function fails and returns -1. This causes
functions relying on get_cpu_topology() to fail. For example-
$ cpupower monitor
Cannot read number of available processors
Fix this by skipping fetching topology info for offline cpus.
Signed-off-by: Shreyas B. Prabhu <shreyas@...ux.vnet.ibm.com>
Reported-by: Pavaman Subramaniyam <pavsubra@...ux.vnet.ibm.com>
---
tools/power/cpupower/utils/helpers/topology.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/tools/power/cpupower/utils/helpers/topology.c b/tools/power/cpupower/utils/helpers/topology.c
index c13120af519b..cea398c176e7 100644
--- a/tools/power/cpupower/utils/helpers/topology.c
+++ b/tools/power/cpupower/utils/helpers/topology.c
@@ -73,6 +73,8 @@ int get_cpu_topology(struct cpupower_topology *cpu_top)
for (cpu = 0; cpu < cpus; cpu++) {
cpu_top->core_info[cpu].cpu = cpu;
cpu_top->core_info[cpu].is_online = sysfs_is_cpu_online(cpu);
+ if (!cpu_top->core_info[cpu].is_online)
+ continue;
if(sysfs_topology_read_file(
cpu,
"physical_package_id",
--
1.9.3
--
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