Hi Dave and All,
Our Video Accelerator and Driver is working fine with test
application with Android 2.6.25 kernel.
While once we bringup userland of Android we see ksoftirqd hogging 100% cpu.
Is there some Android process which generates too many softirqs which we
cannot handle ?
Is there some way to check the softirqs in Android ?
Rgds,
Gulshan
On Tue, Feb 3, 2009 at 9:40 AM, Manish Sharma <manishsharm...@gmail.com>wrote:
> Hi Dave,
>
> In video driver we are not doing any major processing. It is just any
> interface driver to the h/w video codec. It manages the interrupts coming
> from the h/w. For decoding and display 4 interrupts are coming, 2 inputs and
> 2 outputs. If we are using 25fps stream then 100 interrupts/sec. We have
> disabled the h/w decoding and enabled only display then the playback is bit
> improved. We are using tasklet to process the interrupts in video driver. We
> have observed this is causing the issue. Any pointers?
>
> Thanks and Regards,
> Manish
>
> On Tue, Feb 3, 2009 at 3:53 AM, Dave Sparks <davidspa...@android.com>wrote:
>
>>
>> Are you using floating point in your codec?
>>
>> On Feb 2, 1:42 am, Manish Sharma <manishsharm...@gmail.com> wrote:
>> > Hi Dave,
>> >
>> > With software decoder this is not happening. Mostly the issue with our
>> video
>> > driver.
>> >
>> > Regards,
>> > Manish
>> > On Sat, Jan 31, 2009 at 7:06 AM, Dave Sparks <davidspa...@android.com
>> >wrote:
>> >
>> >
>> >
>> > > Something is obviously generating a lot of softirq's. Does this happen
>> > > when you use the software codec?
>> >
>> > > On Jan 29, 11:45 pm, Manish Sharma <manishsharm...@gmail.com> wrote:
>> > > > Hi All,
>> >
>> > > > We have replaced the video decoder of PV player with our H/w video
>> > > decoder
>> > > > and are able to display the video.
>> > > > The issue is that the playback pauses in between and progresses from
>> the
>> > > > same place, frequently.
>> > > > For display we are using ashmem in android_output_surface.cpp file.
>> >
>> > > > With 'top' we have observed that while the video playback is paused
>> > > > "ksoftirqd" CPU load goes to very high value.
>> > > > Please see below.
>> >
>> > > > PID CPU% S #THR VSS RSS UID Name
>> > > > 3 165% R 1 0K 0K root ksoftirqd/0
>> > > > 1539 57% S 9 26096K 6688K media /system/bin/mediaserver
>> > > > 1559 15% S 29 252988K 21996K system system_server
>> > > > 1596 5% S 8 99288K 16896K app_5 android.process.acore
>> > > > 1696 5% R 1 900K 372K root top
>> > > > 10 0% S 1 0K 0K root suspend/0
>> > > > 66 0% S 1 0K 0K root kblockd/0
>> > > > 77 0% S 1 0K 0K root kmmcd
>> > > > 110 0% S 1 0K 0K root pdflush
>> > > > 111 0% S 1 0K 0K root pdflush
>> > > > 112 0% S 1 0K 0K root kswapd0
>> > > > 1 0% S 1 260K 172K root /init
>> > > > 741 0% S 1 0K 0K root mtdblockd
>> > > > 804 0% S 1 0K 0K root rpciod/0
>> > > > 1532 0% S 1 724K 316K root /system/bin/sh
>> > > > 1533 0% S 1 796K 248K system
>> /system/bin/servicemanager
>> > > > 1535 0% S 2 1824K 340K root /system/bin/mountd
>> > > > 1536 0% S 1 652K 252K root /system/bin/debuggerd
>> > > > 1537 0% S 1 71020K 18668K root zygote
>> > > > 1541 0% S 1 1156K 564K bluetoot /system/bin/dbus-daemon
>> > > > 1543 0% S 1 788K 292K root /system/bin/installd
>> > > > 1545 0% S 2 1264K 124K root /sbin/adbd
>> > > > 1599 0% S 10 98372K 13944K radio com.android.phone
>> > > > 1618 0% S 6 98728K 11596K app_12 com.android.mms
>> > > > 1630 0% S 8 99528K 12152K app_4 android.process.media
>> > > > 1643 0% S 6 94584K 10912K app_11 android.process.im
>> > > > 1650 0% S 7 94496K 12700K app_3 com.android.calendar
>> > > > 1661 0% S 6 92156K 11092K app_0 com.android.alarmclock
>> > > > 1675 0% S 1 0K 0K root mmcqd
>> > > > 1679 0% S 6 98084K 12480K app_13 com.android.music
>> > > > 1686 0% S 6 101292K 14196K app_13
>> com.android.music:MovieView
>> > > > Please provide if you have any input.
>> >
>> > > > Thanks and Regards,
>> > > > Manish >>
>>
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