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authorShreyas B. Prabhu <shreyas@linux.vnet.ibm.com>2015-08-03 11:46:00 +0530
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2015-08-29 01:38:16 +0200
commit404c2db635b0e41697eed165b045cb47fd729dd0 (patch)
treed8d0908bf88770db3e5e30009a79a006ed0c5571 /tools
parent82bb70c599d81e6b2535f887b02e1719cc4856ac (diff)
tools: cpupower: 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@linux.vnet.ibm.com> Reported-by: Pavaman Subramaniyam <pavsubra@linux.vnet.ibm.com> Acked-by: Thomas Renninger <trenn@suse.de> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'tools')
-rw-r--r--tools/power/cpupower/utils/helpers/topology.c2
1 files changed, 2 insertions, 0 deletions
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",

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