Hi J.R,
thanks for your prompt reply, the information as below:
for android, which is using the touch UI, what I can describe is that some
times, when touch the screen, it totally has not response for a while before
it starting to move.
since it is determined by using the system UI(in our context, HTC sense),
don't know what native linux command can strace into.
# cat /proc/mounts
cat /proc/mounts
rootfs / rootfs ro,relatime 0 0
proc /proc proc rw,relatime 0 0
sys /sys sysfs rw,relatime 0 0
/dev/block/mtdblock3 /.aufs/system yaffs2 rw,relatime 0 0
tmpfs /.aufs/tmp tmpfs rw,relatime 0 0
/dev/loop0 /.aufs/cache squashfs ro,relatime 0 0
/dev/loop1 /.aufs/squashed squashfs ro,relatime 0 0
aufs /system aufs
rw,relatime,si=67916137,udba=none,rdcache=90,rdblk=0,rdhash=0
0 0
/dev/block/mmcblk0p2 /data ext4
rw,nosuid,nodev,noatime,nodiratime,commit=15,bar
rier=0,nobh,data=writeback,noauto_da_alloc 0 0
/dev/block/mmcblk0p3 /mnt/extdata ext4
rw,nosuid,nodev,noatime,nodiratime,commit
=60,barrier=1,data=ordered,noauto_da_alloc 0 0
/dev/loop2 /data/data ext4
rw,relatime,commit=30,barrier=0,data=ordered,noauto_d
a_alloc 0 0
/dev/block/mtdblock5 /mnt/mtddata yaffs2 rw,nosuid,nodev,noatime,nodiratime
0 0
tmpfs /dev tmpfs rw,relatime,mode=755 0 0
devpts /dev/pts devpts rw,relatime,mode=600 0 0
none /acct cgroup rw,relatime,cpuacct 0 0
tmpfs /mnt/asec tmpfs rw,relatime,mode=755,gid=1000 0 0
none /dev/cpuctl cgroup rw,relatime,cpu 0 0
/dev/block/vold/179:1 /mnt/sdcard vfat
rw,dirsync,nosuid,nodev,noexec,relatime,u
id=1000,gid=1015,fmask=0702,dmask=0702,allow_utime=0020,codepage=cp437,iocha
rset
=iso8859-1,shortname=mixed,utf8,errors=remount-ro 0 0
/dev/block/vold/179:1 /mnt/secure/asec vfat
rw,dirsync,nosuid,nodev,noexec,relat
ime,uid=1000,gid=1015,fmask=0702,dmask=0702,allow_utime=0020,codepage=cp437,
ioch
arset=iso8859-1,shortname=mixed,utf8,errors=remount-ro 0 0
tmpfs /mnt/sdcard/.android_secure tmpfs ro,relatime,size=0k,mode=000 0 0
# cat /sys/module/aufs/parameters/brs
cat /sys/module/aufs/parameters/brs
1
# cat /sys/fs/aufs/si_67916137/xi_path
cat /sys/fs/aufs/si_67916137/xi_path
/.aufs/system/rw/.aufs.xino
# cat /sys/fs/aufs/si_67916137/br0
cat /sys/fs/aufs/si_67916137/br0
/.aufs/system/rw=rw
# cat /sys/fs/aufs/si_67916137/br1
cat /sys/fs/aufs/si_67916137/br1
/.aufs/cache=rr
# cat /sys/fs/aufs/si_67916137/br2
cat /sys/fs/aufs/si_67916137/br2
/.aufs/squashed=rr
#
Linux localhost 2.6.32.15-freak_v1.5 #96 PREEMPT Fri Apr 1 15:50:34 CEST
2011 ar
mv7l GNU/Linux
# dmesg | grep "aufs"
dmesg | grep "aufs"
<6>aufs 2.1-standalone.tree-32-20110307
<4>aufs test_add:262:mount[115]: uid/gid/perm /.aufs/cache 0/0/0777,
0/0/0755
<4>aufs test_add:262:mount[115]: uid/gid/perm /.aufs/squashed 0/0/0777,
0/0/0755
<4>[<c00e03f8>] (filemap_fault+0x0/0x438) from [<c01ecfbc>]
(aufs_fault+0xc4/0x1
04)
<4>[<c01ecef8>] (aufs_fault+0x0/0x104) from [<c00f4610>]
(__do_fault+0x58/0x40c)
Best regards,
dandiest
On Mon, Apr 4, 2011 at 5:04 PM, <[1]sf...@users.sourceforge.net> wrote:
Hello dandiest,
dandiest:
> can anybody give us some idea how to improve? thanks.
I'd suggest you to
- decide one method to measure how the performance is bad.
- strace it and find which systemcall take long time (or memory).
- then I will track down inside of the systemcall.
And these info are necessary too.
(from the aufs README)
----------------------------------------------------------------------
- /proc/mounts (instead of the output of mount(8))
- /sys/module/aufs/*
- /sys/fs/aufs/* (if you have them)
- /debug/aufs/* (if you have them)
- linux kernel version
if your kernel is not plain, for example modified by distributor,
the url where i can download its source is necessary too.
- aufs version which was printed at loading the module or booting the
system, instead of the date you downloaded.
- configuration (define/undefine CONFIG_AUFS_xxx)
- kernel configuration or /proc/config.gz (if you have it)
- behaviour which you think to be incorrect
- actual operation, reproducible one is better
----------------------------------------------------------------------
J. R. Okajima
References
1. mailto:sf...@users.sourceforge.net
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