On Thu, 2017-07-06 at 21:41 +1000, Tom Lanyon wrote: > Sorry for the slow response - I've just had a chance to run some more > tests. > > I tried to disable the SD card reader in the BIOS as suggested > earlier > in the thread, but that didn't seem to make a significant change. > More inline below. > > On Tue, 2017-06-27 at 17:03 +0200, Rafael J. Wysocki wrote: > > > > I would carry out s2idle under turbostat to see how much PC10 > > residency is there while suspended. That may be a significant > > factor. > > > > Most likely there is a device preventing the SoC from reaching its > > deepest low-power states under Linux on your system and it needs to > > be > > identified and dealt with. > I'm not entirely sure how turbostat records metrics so wasn't sure > how > to measure correctly. I kept turbostat running while performing a > s2idle and recorded the output: > > https://gist.githubusercontent.com/tomlanyon/3238e742a155e7fa27658aa0 > 960bdee4/raw/98b5f050e5eb2f88af47b2afd17080e7dd85d20f/turbostat > > I'm not familiar with the output format - I see some high percentages > of C10, but nothing in Pkg%pc10. Which is of interest in this > scenario? I see that you do have Pkg%pc10 of 86.56 in one interval. The system was in Pkg%pc8 for multiple intervals before Pkg%pc10. So can you try this also before your test? # cd /sys/kernel/debug/pmc_core # for i in {0..32}; do echo $i > ltr_ignore; done Thanks, Srinivas > > On 28 June 2017 at 02:14, Srinivas Pandruvada > <srinivas.pandruvada@xxxxxxxxxxxxxxx> wrote: > > > > Also make sure that you have no FW loading error for i915. > > #dmesg | grep i915 > > It will display that Guc FW was loaded etc.. > > The latest FW can be downloaded from > > https://01.org/linuxgraphics/downloads/firmware > > > > If you don't see PC10 residency, we can try something more. > I've confirmed that there's no FW errors for the i915. -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
