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 <shre...@linux.vnet.ibm.com>
Reported-by: Pavaman Subramaniyam <pavsu...@linux.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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