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cpupower: Better detect offlined CPUs

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Before, checking for offlined CPUs was done dirty and
it was checked whether topology parsing returned -1 values.
But this is a valid case on a Xen (and possibly other) kernels.

Do proper online/offline checking, also take CONFIG_HOTPLUG_CPU
option into account (no /sys/devices/../cpuX/online file).

Signed-off-by: Thomas Renninger <trenn@suse.de>
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
This commit is contained in:
Thomas Renninger
2011-08-12 01:11:37 +02:00
committed by Dominik Brodowski
parent 88f984e0e2
commit 7c74d2bc5a
5 changed files with 66 additions and 4 deletions
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2
tools/power/cpupower/utils/helpers/sysfs.h
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@@ -7,6 +7,8 @@
extern unsigned int sysfs_read_file(const char *path, char *buf, size_t buflen);
extern int sysfs_is_cpu_online(unsigned int cpu);
extern unsigned long sysfs_get_idlestate_latency(unsigned int cpu,
unsigned int idlestate);
extern unsigned long sysfs_get_idlestate_usage(unsigned int cpu,