mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-27 06:34:11 +08:00
c717d15614
- Taking non-idle time into account when calculating core busy
time was a mistake and led to a performance regression. Since
the problem it was supposed to address is now taken care of in
a different way, we don't need to do it any more, so drop the
non-idle time tracking from intel_pstate. Dirk Brandewie.
- Changing to fixed point math throughout the busy calculation
introduced rounding errors that adversely affect the accuracy
of intel_pstate's computations. Fix from Dirk Brandewie.
- The PID controller algorithm used by intel_pstate assumes that
the time interval between two adjacent samples will always be the
same which is not the case for deferable timers (used by
intel_pstate) when the system is idle. This leads to inaccurate
predictions and artificially increases convergence times for
the minimum P-state. Fix from Dirk Brandewie.
- intel_pstate carries out computations using 32-bit variables
that may overflow for large enough values of APERF/MPERF. Switch
to using 64-bit variables for computations, from Doug Smythies.
/
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2.0.22 (GNU/Linux)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=YT7e
-----END PGP SIGNATURE-----
Merge tag 'pm-3.15-final' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull intel pstate fixes from Rafael Wysocki:
"Final power management fixes for 3.15
- Taking non-idle time into account when calculating core busy time
was a mistake and led to a performance regression. Since the
problem it was supposed to address is now taken care of in a
different way, we don't need to do it any more, so drop the
non-idle time tracking from intel_pstate. Dirk Brandewie.
- Changing to fixed point math throughout the busy calculation
introduced rounding errors that adversely affect the accuracy of
intel_pstate's computations. Fix from Dirk Brandewie.
- The PID controller algorithm used by intel_pstate assumes that the
time interval between two adjacent samples will always be the same
which is not the case for deferable timers (used by intel_pstate)
when the system is idle. This leads to inaccurate predictions and
artificially increases convergence times for the minimum P-state.
Fix from Dirk Brandewie.
- intel_pstate carries out computations using 32-bit variables that
may overflow for large enough values of APERF/MPERF. Switch to
using 64-bit variables for computations, from Doug Smythies"
* tag 'pm-3.15-final' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
intel_pstate: Improve initial busy calculation
intel_pstate: add sample time scaling
intel_pstate: Correct rounding in busy calculation
intel_pstate: Remove C0 tracking
|
||
|---|---|---|
| .. | ||
| accessibility | ||
| acpi | ||
| amba | ||
| ata | ||
| atm | ||
| auxdisplay | ||
| base | ||
| bcma | ||
| block | ||
| bluetooth | ||
| bus | ||
| cdrom | ||
| char | ||
| clk | ||
| clocksource | ||
| connector | ||
| cpufreq | ||
| cpuidle | ||
| crypto | ||
| dca | ||
| devfreq | ||
| dio | ||
| dma | ||
| edac | ||
| eisa | ||
| extcon | ||
| firewire | ||
| firmware | ||
| fmc | ||
| gpio | ||
| gpu | ||
| hid | ||
| hsi | ||
| hv | ||
| hwmon | ||
| hwspinlock | ||
| i2c | ||
| ide | ||
| idle | ||
| iio | ||
| infiniband | ||
| input | ||
| iommu | ||
| ipack | ||
| irqchip | ||
| isdn | ||
| leds | ||
| lguest | ||
| macintosh | ||
| mailbox | ||
| mcb | ||
| md | ||
| media | ||
| memory | ||
| memstick | ||
| message | ||
| mfd | ||
| misc | ||
| mmc | ||
| mtd | ||
| net | ||
| nfc | ||
| ntb | ||
| nubus | ||
| of | ||
| oprofile | ||
| parisc | ||
| parport | ||
| pci | ||
| pcmcia | ||
| phy | ||
| pinctrl | ||
| platform | ||
| pnp | ||
| power | ||
| powercap | ||
| pps | ||
| ps3 | ||
| ptp | ||
| pwm | ||
| rapidio | ||
| regulator | ||
| remoteproc | ||
| reset | ||
| rpmsg | ||
| rtc | ||
| s390 | ||
| sbus | ||
| scsi | ||
| sfi | ||
| sh | ||
| sn | ||
| spi | ||
| spmi | ||
| ssb | ||
| staging | ||
| target | ||
| tc | ||
| thermal | ||
| tty | ||
| uio | ||
| usb | ||
| uwb | ||
| vfio | ||
| vhost | ||
| video | ||
| virt | ||
| virtio | ||
| vlynq | ||
| vme | ||
| w1 | ||
| watchdog | ||
| xen | ||
| zorro | ||
| Kconfig | ||
| Makefile | ||