Hi All, Finally we have found the cause of this issue. The CONFIG_DEBUG_PREEMPT flag was enable in our kernel.
Regards, Manish On Wed, Feb 4, 2009 at 10:41 PM, Dave Sparks <davidspa...@android.com>wrote: > > No idea. Maybe one of the kernel gurus can enlighten us. > > On Feb 4, 4:15 am, gulshan karmani <gulshan.karm...@gmail.com> wrote: > > 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 >> > > > --~--~---------~--~----~------------~-------~--~----~ unsubscribe: android-porting+unsubscr...@googlegroups.com website: http://groups.google.com/group/android-porting -~----------~----~----~----~------~----~------~--~---
