Cees,

What makes you so sure that this is the result of calling gettimeofday()
repeatedly?! It could be _any_ system call, right?!

Cheers,
  - Andreas

> -----Original Message-----
> From: squeak-dev-admin at lists.squeakfoundation.org 
> [mailto:squeak-dev-admin at lists.squeakfoundation.org] On 
> Behalf Of Cees de Groot
> Sent: Sunday, May 12, 2002 11:20 AM
> To: squeak-dev at lists.squeakfoundation.org
> Subject: gettimeofday() revisited
> 
> 
> If anyone still things that calling gettimeofday() multiple 
> thousand times per 
> second is a good idea, here is some top output:
> 
>  11:18am  up 6 days, 10:57,  1 user,  load average: 0.05, 0.12, 0.39
> 263 processes: 252 sleeping, 1 running, 10 zombie, 0 stopped
> CPU states:  8.7% user, 25.9% system,  0.0% nice, 65.3% idle
> Mem:  1029384K av, 1018216K used,   11168K free,       0K 
> shrd,  117660K buff
> Swap: 1056124K av,   57280K used,  998844K free               
>    803368K cached
> 
>   PID USER     PRI  NI  SIZE  RSS SHARE STAT  LIB %CPU %MEM   
> TIME COMMAND
> 27058 uml0003   17   0  1108 1108  1100 S    1092 25.2  0.1 
> 356:56 linux-vrt-3
> 18004 uml0003   13   0 29620  28M 29612 S     27M 21.5  2.8 
> 363:31 linux-vrt-3
> 
> process 18004 is a Squeak VM inside a user-mode Linux virtual 
> linux machine. 
> Process 27058 is the kernel thread that handles all the 
> system calls. A system 
> call in user-mode Linux is a context switch, and the result 
> of all the 
> gettimeofdays() is that the processor runs hot doing context 
> switches... :-(
> 
> So there goes my idea of installing Swiki servers inside 
> user-mode Linux 
> virtual machines :-(
> -- 
> Cees de Groot               http://www.cdegroot.com     
> <cg at cdegroot.com>
> GnuPG 1024D/E0989E8B 0016 F679 F38D 5946 4ECD  1986 F303 937F 
> E098 9E8B
> 
> 
>