[geeks] Dual Core Rules: your bugs will run twice as fast

[Brian Dunbar]

Charles Shannon Hendrix wrote:
> For years I've watched Thunderbird eat CPU when it is supposed to be idle, and
> have never figured out why.
> 
> Evidently the people writing/maintaining the code have never figured it out
> either.
> 
> Thunderbird routinely will sit at 80-90 percent CPU usage.  It doesn't slow
> down all that much in many cases, but it eats CPU for no apparent reason.
> 
> Today I had to chuck a bit when I saw this:
> 
>> top - 15:11:04 up 15:28,  6 users,  load average: 3.78, 3.51, 3.66
>> Tasks: 139 total,   2 running, 136 sleeping,   0 stopped,   1 zombie
>> Cpu0  : 98.0%us,  1.8%sy,  0.0%ni,  0.0%id,  0.0%wa,  0.0%hi,  0.2%si,  0.0%st
>> Cpu1  :100.0%us,  0.0%sy,  0.0%ni,  0.0%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
>> Mem:   2073804k total,  1640632k used,   433172k free,   179664k buffers
>> Swap:   511984k total,     2824k used,   509160k free,   575216k cached
>>
>>   PID USER      PR  NI CODE DATA  VIRT SWAP  RES  SHR S %CPU   TIME P COMMAND                                          
>> 26043 shannon    0   0  11m 233m  284m 205m  79m  25m S  179 471:18 0 thunderbird-bin                                   
> 
> That's the first few lines of top running on my system as I type this.
> 
> I'm happy to see that I'm getting such an improvement in bug performance.
> 

What platform?   I've never thought to check Thunderbird for that and it
launches by default when my laptop turns on.  It's number 30 in the list.

top
Processes:  74 total, 2 running, 72 sleeping... 289 threads
14:32:53
Load Avg:  0.62, 0.52, 0.53     CPU usage:  9.7% user, 7.1% sys, 83.2%
idle
SharedLibs: num =  209, resident = 32.6M code, 4.45M data, 4.48M LinkEdit
MemRegions: num = 15644, resident =  572M + 13.6M private,  192M shared
PhysMem:   161M wired,  560M active,  283M inactive, 1005M used, 18.5M free
VM: 26.1G +  132M   539477(0) pageins, 466344(0) pageouts

  PID COMMAND      %CPU   TIME   #TH #PRTS #MREGS RPRVT  RSHRD  RSIZE  VSIZE
.....
  486 thunderbir   0.4% 21:39.09   6   120   792  54.4M  35.8M  78.8M
512M
.....

briandunbar_natasha_~/foo/mail:uname -a
Darwin natasha.neenah.na.plexus.com 8.8.1 Darwin Kernel Version 8.8.1:
Mon Sep 25 19:42:00 PDT 2006; root:xnu-792.13.8.obj~1/RELEASE_I386 i386 i386



-- 
Brian Dunbar
System Administrator
Liftport - The Space Elevator Company

brian.dunbar at liftport.com
aim: bdunbar1967

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