Messages in this thread | | | From | Tri Vo <> | Date | Mon, 15 Jul 2019 14:48:13 -0700 | Subject | Re: [PATCH v3] PM / wakeup: show wakeup sources stats in sysfs |
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On Mon, Jul 15, 2019 at 1:37 PM Greg KH <gregkh@linuxfoundation.org> wrote: > > On Mon, Jul 15, 2019 at 01:11:16PM -0700, Tri Vo wrote: > > Userspace can use wakeup_sources debugfs node to plot history of suspend > > blocking wakeup sources over device's boot cycle. This information can > > then be used (1) for power-specific bug reporting and (2) towards > > attributing battery consumption to specific processes over a period of > > time. > > > > However, debugfs doesn't have stable ABI. For this reason, create a > > 'struct device' to expose wakeup sources statistics in sysfs under > > /sys/class/wakeup/<name>/. > > > > Introduce CONFIG_PM_SLEEP_STATS that enables/disables showing wakeup > > source statistics in sysfs. > > > > Suggested-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> > > Signed-off-by: Tri Vo <trong@android.com> > > Tested-by: Tri Vo <trong@android.com> > > Co-Developed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> > perhaps given that I rewrote the whole file last time? :)
Thanks again for the help! > > > > --- > > Documentation/ABI/testing/sysfs-power | 73 ++++++++++++- > > drivers/base/power/Makefile | 1 + > > drivers/base/power/wakeup.c | 12 ++- > > drivers/base/power/wakeup_stats.c | 148 ++++++++++++++++++++++++++ > > include/linux/pm_wakeup.h | 19 ++++ > > kernel/power/Kconfig | 10 ++ > > kernel/power/wakelock.c | 10 ++ > > 7 files changed, 270 insertions(+), 3 deletions(-) > > create mode 100644 drivers/base/power/wakeup_stats.c > > What changed from v2? :)
Oops, my bad.
> And I am guessing that you actually tested this all out, and it works > for you?
Yes, I played around with wakelocks to make sure that wakeup source stats are added/updated/removed as expected.
> Have you changed Android userspace to use the new api with no > problems?
Kalesh helped me test this patch (added him in Tested-by: field in latest patch version). We haven't tested beyond booting and manual inspection on android devices. Android userspace changes should be fairly trivial though.
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