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2f1d407ada
kernel_optimize_test/drivers/cpufreq
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Rafael J. Wysocki 2f1d407ada cpufreq: intel_pstate: Always set max P-state in performance mode 
The only times at which intel_pstate checks the policy set for
a given CPU is the initialization of that CPU and updates of its
policy settings from cpufreq when intel_pstate_set_policy() is
invoked.

That is insufficient, however, because intel_pstate uses the same
P-state selection function for all CPUs regardless of the policy
setting for each of them and the P-state limits are shared between
them.  Thus if the policy is set to "performance" for a particular
CPU, it may not behave as expected if the cpufreq settings are
changed subsequently for another CPU.

That can be easily demonstrated by writing "performance" to
scaling_governor for all CPUs and then switching it to "powersave"
for one of them in which case all of the CPUs will behave as though
their scaling_governor were all "powersave" (even though the policy
still appears to be "performance" for the remaining CPUs).

Fix this problem by modifying intel_pstate_adjust_busy_pstate() to
always set the P-state to the maximum allowed by the current limits
for all CPUs whose policy is set to "performance".

Note that it still is recommended to always change the policy setting
in the same way for all CPUs even with this fix applied to avoid
confusion.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2016-10-24 23:20:25 +02:00
..
acpi-cpufreq.c cpufreq: acpi-cpufreq: use cached frequency mapping when possible 2016-07-21 22:28:32 +02:00
amd_freq_sensitivity.c cpufreq: Reuse new freq-table helpers 2016-07-07 00:14:27 +02:00
arm_big_little_dt.c cpufreq: arm_big_little: use generic OPP functions for {init, free}_opp_table 2016-05-05 01:40:04 +02:00
arm_big_little.c cpufreq: arm_big_little: use generic OPP functions for {init, free}_opp_table 2016-05-05 01:40:04 +02:00
arm_big_little.h cpufreq: arm_big_little: use generic OPP functions for {init, free}_opp_table 2016-05-05 01:40:04 +02:00
at32ap-cpufreq.c cpufreq: at32ap: don't declare local variable as static 2014-04-07 14:31:33 +02:00
blackfin-cpufreq.c blackfin-cpufreq: Mark cpu_set_cclk() as static 2015-12-28 01:51:36 +01:00
cppc_cpufreq.c cpufreq: CPPC: Correct desired_perf calculation 2016-10-13 23:10:41 +02:00
cpufreq_conservative.c cpufreq: conservative: Fix next frequency selection 2016-10-13 14:42:06 +02:00
cpufreq_governor_attr_set.c cpufreq: governor: Move abstract gov_attr_set code to seperate file 2016-04-02 01:09:01 +02:00
cpufreq_governor.c cpufreq / sched: Pass flags to cpufreq_update_util() 2016-08-16 22:14:55 +02:00
cpufreq_governor.h cpufreq: Drop the 'initialized' field from struct cpufreq_governor 2016-06-02 23:24:39 +02:00
cpufreq_ondemand.c cpufreq: Reuse new freq-table helpers 2016-07-07 00:14:27 +02:00
cpufreq_ondemand.h cpufreq: ondemand: Don't keep a copy of freq_table pointer 2016-06-09 00:58:06 +02:00
cpufreq_performance.c cpufreq: governor: Get rid of governor events 2016-06-02 23:24:15 +02:00
cpufreq_powersave.c cpufreq: governor: Get rid of governor events 2016-06-02 23:24:15 +02:00
cpufreq_stats.c cpufreq: Remove cpufreq_frequency_get_table() 2016-06-09 00:58:05 +02:00
cpufreq_userspace.c cpufreq: governor: Get rid of governor events 2016-06-02 23:24:15 +02:00
cpufreq-dt-platdev.c cpufreq: ti: Use generic platdev driver 2016-09-16 23:57:04 +02:00
cpufreq-dt.c cpufreq: dt: Support governor tunables per policy 2016-09-13 02:39:12 +02:00
cpufreq-dt.h cpufreq: dt: Support governor tunables per policy 2016-09-13 02:39:12 +02:00
cpufreq-nforce2.c cpufreq: Use consistent prefixing via pr_fmt 2016-04-09 01:35:18 +02:00
cpufreq.c cpufreq: create link to policy only for registered CPUs 2016-09-13 02:41:15 +02:00
cris-artpec3-cpufreq.c cpufreq: create another field .flags in cpufreq_frequency_table 2014-04-07 14:43:50 +02:00
cris-etraxfs-cpufreq.c cpufreq: create another field .flags in cpufreq_frequency_table 2014-04-07 14:43:50 +02:00
davinci-cpufreq.c cpufreq: davinci: Reuse cpufreq_generic_frequency_table_verify() 2016-06-09 00:58:07 +02:00
dbx500-cpufreq.c cpufreq: drop owner assignment from platform_drivers 2014-10-20 16:20:24 +02:00
e_powersaver.c cpufreq: e_powersaver: Use IS_ENABLED() instead of checking for built-in or module 2016-04-27 22:42:34 +02:00
elanfreq.c cpufreq: Use consistent prefixing via pr_fmt 2016-04-09 01:35:18 +02:00
exynos5440-cpufreq.c PM / OPP: Prefix exported opp routines with dev_pm_opp_ 2015-09-15 02:03:16 +02:00
freq_table.c cpufreq: Handle sorted frequency tables more efficiently 2016-07-07 00:13:20 +02:00
gx-suspmod.c cpufreq: gx-suspmod: Fix two typos in two comments 2015-06-15 15:46:15 +02:00
highbank-cpufreq.c Merge branch 'mailbox-for-linus' of git://git.linaro.org/landing-teams/working/fujitsu/integration 2014-10-21 11:21:19 -07:00
ia64-acpi-cpufreq.c cpufreq: Use consistent prefixing via pr_fmt 2016-04-09 01:35:18 +02:00
imx6q-cpufreq.c Merge branch 'pm-opp' 2015-11-02 00:54:37 +01:00
integrator-cpufreq.c cpufreq: integrator: Fix module autoload for OF platform driver 2015-09-25 23:29:35 +02:00
intel_pstate.c cpufreq: intel_pstate: Always set max P-state in performance mode 2016-10-24 23:20:25 +02:00
Kconfig Merge branch 'pm-cpufreq-sched' into pm-cpufreq 2016-10-02 01:42:33 +02:00
Kconfig.arm cpufreq: hisilicon: Use generic platdev driver 2016-04-25 16:18:24 +02:00
Kconfig.powerpc cpufreq: qoriq: rename the driver 2015-03-18 22:35:16 +01:00
Kconfig.x86 cpufreq: intel_pstate: Enforce _PPC limits 2016-04-28 01:01:39 +02:00
kirkwood-cpufreq.c cpufreq: kirkwood: add missing \n to end of dev_err messages 2016-09-26 15:10:58 +02:00
longhaul.c Power management material for v4.7-rc1 2016-05-16 19:17:22 -07:00
longhaul.h
longrun.c
loongson1-cpufreq.c CPUFREQ: Loongson1: Replace goto out with return in ls1x_cpufreq_probe() 2016-05-13 14:02:08 +02:00
loongson2_cpufreq.c cpufreq: Use consistent prefixing via pr_fmt 2016-04-09 01:35:18 +02:00
Makefile Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2016-05-19 10:02:26 -07:00
maple-cpufreq.c cpufreq: Use consistent prefixing via pr_fmt 2016-04-09 01:35:18 +02:00
mt8173-cpufreq.c Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux 2016-05-26 09:23:43 -07:00
mvebu-cpufreq.c cpufreq: mvebu: fix integer to pointer cast 2016-06-13 23:49:43 +02:00
omap-cpufreq.c remove lots of IS_ERR_VALUE abuses 2016-05-27 15:26:11 -07:00
p4-clockmod.c cpufreq: Use consistent prefixing via pr_fmt 2016-04-09 01:35:18 +02:00
pasemi-cpufreq.c cpufreq: Use cpufreq_for_each_* macros for frequency table iteration 2014-04-30 00:06:21 +02:00
pcc-cpufreq.c Revert "cpufreq: pcc-cpufreq: update default value of cpuinfo_transition_latency" 2016-07-22 23:51:06 +02:00
pmac32-cpufreq.c powerpc updates for 4.7 2016-05-20 10:12:41 -07:00
pmac64-cpufreq.c cpufreq: Use consistent prefixing via pr_fmt 2016-04-09 01:35:18 +02:00
powernow-k6.c cpufreq: Use consistent prefixing via pr_fmt 2016-04-09 01:35:18 +02:00
powernow-k7.c cpufreq: Use consistent prefixing via pr_fmt 2016-04-09 01:35:18 +02:00
powernow-k7.h
powernow-k8.c ACPI / processor: Drop an unused argument of a cleanup routine 2015-07-22 22:11:16 +02:00
powernow-k8.h cpufreq: powernow-k8: Suppress checkpatch warnings 2014-05-17 01:27:01 +02:00
powernv-cpufreq.c Merge branches 'pm-sleep' and 'pm-cpufreq' 2016-08-12 22:53:58 +02:00
ppc_cbe_cpufreq_pervasive.c
ppc_cbe_cpufreq_pmi.c cpufreq: Remove cpufreq_frequency_get_table() 2016-06-09 00:58:05 +02:00
ppc_cbe_cpufreq.c cpufreq: Use cpufreq_for_each_* macros for frequency table iteration 2014-04-30 00:06:21 +02:00
ppc_cbe_cpufreq.h cpufreq: e_powersaver: Use IS_ENABLED() instead of checking for built-in or module 2016-04-27 22:42:34 +02:00
pxa2xx-cpufreq.c cpufreq: Use consistent prefixing via pr_fmt 2016-04-09 01:35:18 +02:00
pxa3xx-cpufreq.c cpufreq: Remove cpufreq_generic_exit() 2014-03-12 01:06:00 +01:00
qoriq-cpufreq.c cpufreq: qoriq: Fix cooling device registration issue during suspend 2016-04-25 16:07:02 +02:00
s3c24xx-cpufreq-debugfs.c cpufreq: Use consistent prefixing via pr_fmt 2016-04-09 01:35:18 +02:00
s3c24xx-cpufreq.c cpufreq: Return index from cpufreq_frequency_table_target() 2016-06-09 00:58:06 +02:00
s3c64xx-cpufreq.c cpufreq: Use cpufreq_for_each_* macros for frequency table iteration 2014-04-30 00:06:21 +02:00
s3c2410-cpufreq.c cpufreq: s3c24xx: Remove some dead code 2014-07-19 04:24:59 +09:00
s3c2412-cpufreq.c cpufreq: Use consistent prefixing via pr_fmt 2016-04-09 01:35:18 +02:00
s3c2416-cpufreq.c cpufreq: s3c: remove incorrect __init annotations 2015-02-19 06:36:53 +01:00
s3c2440-cpufreq.c cpufreq: Use consistent prefixing via pr_fmt 2016-04-09 01:35:18 +02:00
s5pv210-cpufreq.c ARM: SoC driver updates for v4.8 2016-08-01 18:36:01 -04:00
sa1100-cpufreq.c cpufreq: Mark ARM drivers with CPUFREQ_NEED_INITIAL_FREQ_CHECK flag 2014-01-06 14:17:25 +01:00
sa1110-cpufreq.c cpufreq: sa1110: set memory type for h3600 2014-07-16 14:30:17 +02:00
sc520_freq.c cpufreq: Use consistent prefixing via pr_fmt 2016-04-09 01:35:18 +02:00
scpi-cpufreq.c cpufreq-SCPI: Delete unnecessary assignment for the field "owner" 2016-08-18 03:42:32 +02:00
sfi-cpufreq.c cpufreq: sfi: use kmemdup rather than duplicating its implementation 2015-09-01 15:51:15 +02:00
sh-cpufreq.c cpufreq: Convert existing drivers to use cpufreq_freq_transition_{begin|end} 2014-03-26 16:41:41 +01:00
sparc-us2e-cpufreq.c cpufreq: add 'freq_table' in struct cpufreq_policy 2014-03-12 01:06:00 +01:00
sparc-us3-cpufreq.c cpufreq: add 'freq_table' in struct cpufreq_policy 2014-03-12 01:06:00 +01:00
spear-cpufreq.c cpufreq: drop owner assignment from platform_drivers 2014-10-20 16:20:24 +02:00
speedstep-centrino.c cpufreq: Use consistent prefixing via pr_fmt 2016-04-09 01:35:18 +02:00
speedstep-ich.c cpufreq: Use consistent prefixing via pr_fmt 2016-04-09 01:35:18 +02:00
speedstep-lib.c cpufreq: Use consistent prefixing via pr_fmt 2016-04-09 01:35:18 +02:00
speedstep-lib.h
speedstep-smi.c cpufreq: Use consistent prefixing via pr_fmt 2016-04-09 01:35:18 +02:00
sti-cpufreq.c cpufreq: st: add missing \n to end of dev_err message 2016-09-26 15:11:42 +02:00
tegra20-cpufreq.c cpufreq: tegra20: remove superfluous CONFIG_PM ifdefs 2015-09-26 03:00:57 +02:00
tegra124-cpufreq.c cpufreq: tegra124: No need of setting platform-data 2016-04-09 01:12:09 +02:00
unicore2-cpufreq.c cpufreq: unicore32: replace IS_ERR and PTR_ERR with PTR_ERR_OR_ZERO 2014-04-21 23:42:27 +02:00
vexpress-spc-cpufreq.c cpufreq: arm_big_little: use generic OPP functions for {init, free}_opp_table 2016-05-05 01:40:04 +02:00