Openmoko Bug #1315: xglamo: Performance decreases after a while

[Openmoko Public Trac]

#1315: xglamo: Performance decreases after a while
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    Reporter:  zecke at selfish.org        |        Owner:  openmoko-devel
        Type:  defect                   |       Status:  new           
    Priority:  highest                  |    Milestone:                
   Component:  Xfbdev (kdrive), Xglamo  |      Version:  Om2008.8      
    Severity:  critical                 |   Resolution:                
    Keywords:                           |    Blockedby:                
Reproducible:                           |     Blocking:                
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Comment(by sillern):

 I'm experiencing this issue quite often, I haven't been able to figure out
 how to reproduce it quick enough though.
 I just let it suspend and wake up a few times during a longer period, I
 notice it after a few hours.

 What can I do to debug this?

 From what I can see, as others also have pointed out, it's spinning
 heavily in gettimeofday()

 root at om-gta02:~# time strace -cp `pidof Xglamo`
 Process 2090 attached - interrupt to quit
 Process 2090 detached
 % time     seconds  usecs/call     calls    errors syscall
 ------ ----------- ----------- --------- --------- ----------------
  99.86   15.487621          76    204940           gettimeofday
   0.05    0.007351          18       412           nanosleep
   0.04    0.006493          63       103           select
   0.03    0.004623          22       206           setitimer
   0.02    0.003630          35       103           sigreturn
 ------ ----------- ----------- --------- --------- ----------------
 100.00   15.509718                205764           total
 real    8m 40.40s
 user    0m 27.72s
 sys     3m 33.95s
 root at om-gta02:~#

-- 
Ticket URL: <https://docs.openmoko.org/trac/ticket/1315#comment:19>
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