diff options
author | Thomas Renninger <trenn@suse.de> | 2015-10-22 18:17:07 +0300 |
---|---|---|
committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2015-11-02 04:28:59 +0300 |
commit | 19c9fb896f54ade387676f134ce1de9bcd3cd478 (patch) | |
tree | 97ac2ed1338d42516dcb0757a2d872603709b52f /tools/power/cpupower/utils | |
parent | 645209472d909071df5af2c42ea623ef011ad3c8 (diff) | |
download | linux-19c9fb896f54ade387676f134ce1de9bcd3cd478.tar.xz |
cpupower: Enable disabled Cstates if they are below max latency
cpupower idle-set -D <latency>
currently only disables all C-states that have a higher latency than the
specified <latency>. But if deep sleep states were already disabled and
have a lower latency, they should get enabled again.
For example:
This call:
cpupower idle-set -D 30
disables all C-states with a higher or equal latency than 30.
If one then calls:
cpupower idle-set -D 100
C-states with a latency between 30-99 will get enabled again with this patch
now. It is ensured that only C-states with a latency of 100 and higher are
disabled.
Signed-off-by: Thomas Renninger <trenn@suse.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'tools/power/cpupower/utils')
-rw-r--r-- | tools/power/cpupower/utils/cpuidle-set.c | 17 |
1 files changed, 13 insertions, 4 deletions
diff --git a/tools/power/cpupower/utils/cpuidle-set.c b/tools/power/cpupower/utils/cpuidle-set.c index 9a9b7a337d7b..eaea1301e29b 100644 --- a/tools/power/cpupower/utils/cpuidle-set.c +++ b/tools/power/cpupower/utils/cpuidle-set.c @@ -148,12 +148,21 @@ int cmd_idle_set(int argc, char **argv) (cpu, idlestate); state_latency = sysfs_get_idlestate_latency (cpu, idlestate); - if (disabled == 1 || latency > state_latency) + if (disabled == 1) { + if (latency > state_latency){ + ret = sysfs_idlestate_disable + (cpu, idlestate, 0); + if (ret == 0) + printf(_("Idlestate %u enabled on CPU %u\n"), idlestate, cpu); + } continue; - ret = sysfs_idlestate_disable - (cpu, idlestate, 1); - if (ret == 0) + } + if (latency <= state_latency){ + ret = sysfs_idlestate_disable + (cpu, idlestate, 1); + if (ret == 0) printf(_("Idlestate %u disabled on CPU %u\n"), idlestate, cpu); + } } break; case 'E': |