Openmoko Bug #1813: Excessive enlightenment. CPU/syscalls

[Openmoko Public Trac]

#1813: Excessive enlightenment. CPU/syscalls
----------------------+-----------------------------------------------------
 Reporter:  alvieboy  |       Owner:  openmoko-devel
     Type:  defect    |      Status:  new           
 Priority:  normal    |   Milestone:  Om2008.8      
Component:  unknown   |     Version:  GTA02v5       
 Severity:  normal    |    Keywords:                
 Blocking:            |   Blockedby:                
----------------------+-----------------------------------------------------
 enlightenment shipped with Om2008.8 eats a lot of CPU (average 6%), and
 seems to do some "stupid" things.

 This is a 10s run of strace on the process, showing just the summary:

 # time strace -c -p 1419
 Process 1419 attached - interrupt to quit
 Process 1419 detached
 % time     seconds  usecs/call     calls    errors syscall
 ------ ----------- ----------- --------- --------- ----------------
  31.38    0.016566          64       260           select
  27.79    0.014673          16       899           gettimeofday
  23.61    0.012465         204        61           stat64
   6.49    0.003428           7       515           ioctl
   3.64    0.001924         481         4           write
   1.59    0.000840         168         5           munmap
   1.54    0.000813         163         5           mmap2
   1.42    0.000752          68        11         1 read
   1.32    0.000695          70        10           fstat64
   1.20    0.000636         127         5           fcntl64
   0.00    0.000000           0        15         5 open
   0.00    0.000000           0        10           close
   0.00    0.000000           0         2           poll
   0.00    0.000000           0        10           getdents64
 ------ ----------- ----------- --------- --------- ----------------
 100.00    0.052792                  1812         6 total
 real    0m 10.10s
 user    0m 0.38s
 sys     0m 1.37s


 This makes about 180 syscalls/second.

 But the most "stupid" one is enlightnment stat'ing
 "/usr/share/enlightenment/data/themes/illume.edj" about 6 times per
 second. Also it iterates over USB devices, but I am not sure what for.

 These dumps were made with Neo idling.

 Is this an enlightenment defect/feature, or Om build of enlightenment ?

-- 
Ticket URL: <https://docs.openmoko.org/trac/ticket/1813>
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