tools/power turbostat: allow running without cpu0
authorPrarit Bhargava <prarit@redhat.com>
Mon, 25 May 2015 12:34:28 +0000 (08:34 -0400)
committerLen Brown <len.brown@intel.com>
Wed, 27 May 2015 22:04:01 +0000 (18:04 -0400)
commit7ce7d5de6dd08ee2a713ef13f4499073b4a72b7f
treed3e3e6dac67aed79f05a334e012ae6213b29ec42
parente9be7dd62899194ebdd90d417fc6c07d5d157912
tools/power turbostat: allow running without cpu0

Linux-3.7 added CONFIG_BOOTPARAM_HOTPLUG_CPU0,
allowing systems to offline cpu0.

But when cpu0 is offline, turbostat will not run:

 # turbostat ls
turbostat: no /dev/cpu/0/msr

This patch replaces the hard-coded use of cpu0 in turbostat
with the current cpu, allowing it to run without a cpu0.

Fewer cross-calls may also be needed due to use of current cpu,
though this hard-coding was used only for the --debug preamble.

Signed-off-by: Prarit Bhargava <prarit@redhat.com>
Signed-off-by: Len Brown <len.brown@intel.com>
tools/power/x86/turbostat/turbostat.c