Marko Mäkelä kirjoitti:
On Tue, Jan 16, 2007 at 09:53:21PM +0200, Kartsa wrote:
Have you tried OProfile or strace -p <pid of vdr>, or attaching gdb to
the running vdr process?
Hmm, what's OProfile? I am not quite sure if I am starting matroxfb in
the right place.
OProfile is a continuous profiler for processors that contain
performance counters, such as CPU_CLK_UNHALTED (which is incremented on
every clock cycle when the processor is unhalted). Similar tools
include DCPI on Digital UNIX and Intel VTune on Windows.
Tried with strace and got
gettimeofday({1169044896, 580954}, NULL) = 0
clock_gettime(CLOCK_REALTIME, {1169044896, 581713131}) = 0
futex(0x81dc204, FUTEX_WAIT, 6667, {0, 999240869}) = -1 ETIMEDOUT
(Connection timed out)
gettimeofday({1169044897, 905042}, NULL) = 0
futex(0x81dc1d8, FUTEX_WAKE, 1) = 0
time(NULL) = 1169044897
time(NULL) = 1169044897
time(NULL) = 1169044897
time(NULL) = 1169044897
time(NULL) = 1169044897
alarm(30) = 29
time(NULL) = 1169044897
time(NULL) = 1169044897
time(NULL) = 1169044897
time(NULL) = 1169044897
stat64("/srv/vdr/.update", {st_mode=S_IFREG|0644, st_size=0, ...}) = 0
time(NULL) = 1169044897
gettid() = 2600
time(NULL) = 1169044898
accept(23, 0xbfc07588, [16]) = -1 EAGAIN (Resource
temporarily unavailable)
over and over again. This was with vdr's pid.
And this is oprofiler output
CPU: CPU with timer interrupt, speed 0 MHz (estimated)
Profiling through timer interrupt
samples % image name symbol name
9500 98.0595 anon (tgid:2600 range:0x48c000-0x48d000) (no symbols)
188 1.9405 vdr (no symbols)
And it is the same results after I restart vdr. The difference is that
before restart vdr caused cpu load of 99,5% and after restart vdr caused
cpu load of 1%. And this is because of the channel being a radio channel.
Oprofilers output is slightly different
CPU: CPU with timer interrupt, speed 0 MHz (estimated)
Profiling through timer interrupt
samples % image name symbol name
9500 96.7216 anon (tgid:2600 range:0x48c000-0x48d000) (no symbols)
313 3.1867 vdr (no symbols)
9 0.0916 anon (tgid:4479 range:0xf5a000-0xf5b000) (no symbols)
I suspended softdevice output from the settings but it made no change.
Still after reboot vdr takes all cpu time. When I changed softdevice
playback setting to playing from the main menu it caused restart of vdr
and cpu load dropped to normal (~60%). So suspending did not help either.
I tried also plugin option -vo shm: to see the effect and this dropped
cpu load of vdr to 2%. But this is ofcourse not usable
\\Kartsa
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