Brennan Shacklett d253d2a526 intel_pstate: Improve accuracy by not truncating until final result ...

This patch addresses Bug 60727
(https://bugzilla.kernel.org/show_bug.cgi?id=60727)
which was due to the truncation of intermediate values in the
calculations, which causes the code to consistently underestimate the
current cpu frequency, specifically 100% cpu utilization was truncated
down to the setpoint of 97%. This patch fixes the problem by keeping
the results of all intermediate calculations as fixed point numbers
rather scaling them back and forth between integers and fixed point.

References: https://bugzilla.kernel.org/show_bug.cgi?id=60727
Signed-off-by: Brennan Shacklett <bpshacklett@gmail.com>
Acked-by: Dirk Brandewie <dirk.j.brandewie@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

2013-10-22 01:15:38 +02:00

..

acpi-cpufreq.c

acpi-cpufreq: skip loading acpi_cpufreq after intel_pstate

2013-09-25 03:19:09 +02:00

amd_freq_sensitivity.c

cpufreq: AMD "frequency sensitivity feedback" powersave bias for ondemand governor

2013-04-10 13:19:26 +02:00

arm_big_little_dt.c

cpufreq: arm_big_little: remove device tree parsing for cpu nodes

2013-08-21 10:29:55 +01:00

arm_big_little.c

cpufreq: arm-big-little: call CPUFREQ_POSTCHANGE notfier in error cases

2013-06-24 18:18:58 +05:30

arm_big_little.h

cpufreq: ARM big LITTLE: Move cpu_to_cluster() to arm_big_little.h

2013-05-12 14:04:15 +02:00

at32ap-cpufreq.c

cpufreq: Drop the owner field from struct cpufreq_driver

2013-08-10 03:24:47 +02:00

blackfin-cpufreq.c

cpufreq: Drop the owner field from struct cpufreq_driver

2013-08-10 03:24:47 +02:00

cpufreq_conservative.c

cpufreq: governors: Remove duplicate check of target freq in supported range

2013-08-28 22:03:02 +02:00

cpufreq_governor.c

cpufreq: Don't use smp_processor_id() in preemptible context

2013-08-29 22:19:23 +02:00

cpufreq_governor.h

cpufreq: governor: Fix typos in comments

2013-08-28 22:04:54 +02:00

cpufreq_ondemand.c

cpufreq: governors: Remove duplicate check of target freq in supported range

2013-08-28 22:03:02 +02:00

cpufreq_performance.c

cpufreq: Clean up header files included in the core

2013-08-07 23:34:09 +02:00

cpufreq_powersave.c

cpufreq: Clean up header files included in the core

2013-08-07 23:34:09 +02:00

cpufreq_stats.c

cpufreq: Fix wrong time unit conversion

2013-09-10 02:49:46 +02:00

cpufreq_userspace.c

cpufreq: Fix minor formatting issues

2013-06-21 01:06:34 +02:00

cpufreq-cpu0.c

cpufreq: cpufreq-cpu0: NULL is a valid regulator, part 2

2013-09-30 20:08:59 +02:00

cpufreq-nforce2.c

cpufreq: Drop the owner field from struct cpufreq_driver

2013-08-10 03:24:47 +02:00

cpufreq.c

cpufreq: check cpufreq driver is valid and cpufreq isn't disabled in cpufreq_get()

2013-09-25 03:24:02 +02:00

cris-artpec3-cpufreq.c

cpufreq: Drop the owner field from struct cpufreq_driver

2013-08-10 03:24:47 +02:00

cris-etraxfs-cpufreq.c

cpufreq: Drop the owner field from struct cpufreq_driver

2013-08-10 03:24:47 +02:00

davinci-cpufreq.c

cpufreq: davinci: call CPUFREQ_POSTCHANGE notfier in error cases

2013-06-24 18:18:58 +05:30

dbx500-cpufreq.c

cpufreq: delete __cpuinit usage from all cpufreq files

2013-07-14 19:36:57 -04:00

e_powersaver.c

cpufreq: Drop the owner field from struct cpufreq_driver

2013-08-10 03:24:47 +02:00

elanfreq.c

cpufreq: Drop the owner field from struct cpufreq_driver

2013-08-10 03:24:47 +02:00

exynos4x12-cpufreq.c

arm-soc: cleanups

2013-02-21 14:58:40 -08:00

exynos4210-cpufreq.c

arm-soc: cleanups

2013-02-21 14:58:40 -08:00

exynos5250-cpufreq.c

arm-soc: cleanups

2013-02-21 14:58:40 -08:00

exynos5440-cpufreq.c

cpufreq: exynos5440: Fix potential NULL pointer dereference

2013-09-25 03:25:58 +02:00

exynos-cpufreq.c

Merge branch 'cpufreq-fixes' of git://git.linaro.org/people/vireshk/linux into pm-cpufreq

2013-08-14 22:22:57 +02:00

exynos-cpufreq.h

cpufreq: fix EXYNOS drivers selection

2013-08-12 12:00:21 +05:30

freq_table.c

cpufreq: Clean up header files included in the core

2013-08-07 23:34:09 +02:00

gx-suspmod.c

cpufreq / gx: Fix gx_detect_chipset() __init attribute location

2013-08-14 22:24:23 +02:00

highbank-cpufreq.c

cpufreq: highbank-cpufreq: remove device tree parsing for cpu nodes

2013-08-21 10:29:54 +01:00

ia64-acpi-cpufreq.c

cpufreq: Drop the owner field from struct cpufreq_driver

2013-08-10 03:24:47 +02:00

imx6q-cpufreq.c

cpufreq: imx6q-cpufreq: assign cpu_dev correctly to cpu0 device

2013-09-19 03:53:43 +02:00

integrator-cpufreq.c

cpufreq: integrator: move cpufreq driver to drivers/cpufreq

2013-04-08 13:02:31 +02:00

intel_pstate.c

intel_pstate: Improve accuracy by not truncating until final result

2013-10-22 01:15:38 +02:00

Kconfig

cpufreq: Fix incorrect dependecies for ARM SA11xx drivers

2013-05-12 14:04:16 +02:00

Kconfig.arm

cpufreq: fix EXYNOS drivers selection

2013-08-12 12:00:21 +05:30

Kconfig.powerpc

Merge branch 'pm-cpufreq-assorted' into pm-cpufreq

2013-06-27 21:46:45 +02:00

Kconfig.x86

cpufreq: X86_AMD_FREQ_SENSITIVITY: select CPU_FREQ_TABLE

2013-06-18 13:53:11 +05:30

kirkwood-cpufreq.c

Merge branch 'cpu_of_node' of git://linux-arm.org/linux-skn into pm-cpufreq-next

2013-08-23 00:57:19 +02:00

longhaul.c

cpufreq: Drop the owner field from struct cpufreq_driver

2013-08-10 03:24:47 +02:00

longhaul.h

cpufreq: delete __cpuinit usage from all cpufreq files

2013-07-14 19:36:57 -04:00

longrun.c

cpufreq: Drop the owner field from struct cpufreq_driver

2013-08-10 03:24:47 +02:00

loongson2_cpufreq.c

Merge back earlier 'pm-cpufreq' material

2013-08-14 22:21:16 +02:00

Makefile

cpufreq: Remove unused APERF/MPERF support

2013-07-26 01:06:43 +02:00

maple-cpufreq.c

Merge branch 'cpu_of_node' of git://linux-arm.org/linux-skn into pm-cpufreq-next

2013-08-23 00:57:19 +02:00

omap-cpufreq.c

cpufreq: delete __cpuinit usage from all cpufreq files

2013-07-14 19:36:57 -04:00

p4-clockmod.c

cpufreq: Drop the owner field from struct cpufreq_driver

2013-08-10 03:24:47 +02:00

pasemi-cpufreq.c

cpufreq: Drop the owner field from struct cpufreq_driver

2013-08-10 03:24:47 +02:00

pcc-cpufreq.c

cpufreq: Drop the owner field from struct cpufreq_driver

2013-08-10 03:24:47 +02:00

pmac32-cpufreq.c

Merge branch 'cpu_of_node' of git://linux-arm.org/linux-skn into pm-cpufreq-next

2013-08-23 00:57:19 +02:00

pmac64-cpufreq.c

Merge branch 'cpu_of_node' of git://linux-arm.org/linux-skn into pm-cpufreq-next

2013-08-23 00:57:19 +02:00

powernow-k6.c

cpufreq: Drop the owner field from struct cpufreq_driver

2013-08-10 03:24:47 +02:00

powernow-k7.c

cpufreq: Drop the owner field from struct cpufreq_driver

2013-08-10 03:24:47 +02:00

powernow-k7.h

[CPUFREQ] Move x86 drivers to drivers/cpufreq/

2011-05-19 18:51:07 -04:00

powernow-k8.c

cpufreq: Drop the owner field from struct cpufreq_driver

2013-08-10 03:24:47 +02:00

powernow-k8.h

cpufreq: Remove support for hardware P-state chips from powernow-k8

2012-09-09 22:05:30 +02:00

ppc_cbe_cpufreq_pervasive.c

cpufreq: powerpc/platforms/cell: move cpufreq driver to drivers/cpufreq

2013-04-10 13:19:26 +02:00

ppc_cbe_cpufreq_pmi.c

cpufreq: powerpc/platforms/cell: move cpufreq driver to drivers/cpufreq

2013-04-10 13:19:26 +02:00

ppc_cbe_cpufreq.c

cpufreq: Drop the owner field from struct cpufreq_driver

2013-08-10 03:24:47 +02:00

ppc_cbe_cpufreq.h

cpufreq: powerpc/platforms/cell: move cpufreq driver to drivers/cpufreq

2013-04-10 13:19:26 +02:00

ppc-corenet-cpufreq.c

cpufreq: Drop the owner field from struct cpufreq_driver

2013-08-10 03:24:47 +02:00

pxa2xx-cpufreq.c

cpufreq / pxa2xx: Fix pxa_cpufreq_init_voltages() __init attribute location

2013-08-14 22:24:23 +02:00

pxa3xx-cpufreq.c

pxa3xx-cpufreq.c: Avoid using ARRAY_AND_SIZE(e) as a function argument

2013-08-14 22:24:23 +02:00

s3c24xx-cpufreq-debugfs.c

cpufreq: s3c24xx: move cpufreq driver to drivers/cpufreq

2013-05-20 23:04:28 +09:00

s3c24xx-cpufreq.c

cpufreq / s3c24xx: Fix s3c_cpufreq_initclks() __init attribute location

2013-08-14 22:24:24 +02:00

s3c64xx-cpufreq.c

cpufreq: s3c64xx: Rename index to driver_data

2013-10-16 23:53:38 +02:00

s3c2410-cpufreq.c

cpufreq: s3c24xx: move cpufreq driver to drivers/cpufreq

2013-05-20 23:04:28 +09:00

s3c2412-cpufreq.c

cpufreq: s3c24xx: move cpufreq driver to drivers/cpufreq

2013-05-20 23:04:28 +09:00

s3c2416-cpufreq.c

cpufreq: Drop the owner field from struct cpufreq_driver

2013-08-10 03:24:47 +02:00

s3c2440-cpufreq.c

cpufreq: s3c24xx: move cpufreq driver to drivers/cpufreq

2013-05-20 23:04:28 +09:00

s5pv210-cpufreq.c

cpufreq: Notify all policy->cpus in cpufreq_notify_transition()

2013-04-02 15:24:00 +02:00

sa1100-cpufreq.c

cpufreq: sa11x0: move cpufreq driver to drivers/cpufreq

2013-04-10 13:19:24 +02:00

sa1110-cpufreq.c

cpufreq: sa11x0: move cpufreq driver to drivers/cpufreq

2013-04-10 13:19:24 +02:00

sc520_freq.c

cpufreq: Drop the owner field from struct cpufreq_driver

2013-08-10 03:24:47 +02:00

sh-cpufreq.c

cpufreq: Drop the owner field from struct cpufreq_driver

2013-08-10 03:24:47 +02:00

sparc-us2e-cpufreq.c

cpufreq: Drop the owner field from struct cpufreq_driver

2013-08-10 03:24:47 +02:00

sparc-us3-cpufreq.c

cpufreq: Drop the owner field from struct cpufreq_driver

2013-08-10 03:24:47 +02:00

spear-cpufreq.c

cpufreq: SPEAr: Fix incorrect variable type

2013-09-30 20:05:43 +02:00

speedstep-centrino.c

cpufreq: Drop the owner field from struct cpufreq_driver

2013-08-10 03:24:47 +02:00

speedstep-ich.c

cpufreq: Drop the owner field from struct cpufreq_driver

2013-08-10 03:24:47 +02:00

speedstep-lib.c

cpufreq: Add support for x86 cpuinfo auto loading v4

2012-01-26 16:49:06 -08:00

speedstep-lib.h

[CPUFREQ] Move x86 drivers to drivers/cpufreq/

2011-05-19 18:51:07 -04:00

speedstep-smi.c

cpufreq: Drop the owner field from struct cpufreq_driver

2013-08-10 03:24:47 +02:00

tegra-cpufreq.c

cpufreq: tegra: fix the wrong clock name

2013-08-23 21:58:28 +05:30

unicore2-cpufreq.c

cpufreq: unicore2: Staticize local symbol

2013-08-14 22:24:24 +02:00