[Pharo-dev] CPU usage change on newer OS

Sven Van Caekenberghe sven at stfx.eu
Fri Apr 25 01:30:24 EDT 2014


On 25 Apr 2014, at 01:19, Esteban A. Maringolo <emaringolo at gmail.com> wrote:

> What % of CPU is it using?
> 
> My VM on idle state consumes about ~4-5% CPU.

That is about what I am used to, here is a real view of an Amazon AWS EC2 Small Instance running 4 Pharo VMs:

top - 05:25:09 up 413 days, 15:27,  1 user,  load average: 0.88, 0.66, 0.49
Tasks:  73 total,   3 running,  70 sleeping,   0 stopped,   0 zombie
Cpu(s):  0.6%us,  0.4%sy,  0.0%ni, 96.3%id,  0.2%wa,  0.0%hi,  0.0%si,  2.5%st
Mem:   1706660k total,  1654928k used,    51732k free,   136692k buffers
Swap:        0k total,        0k used,        0k free,  1006556k cached

  PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND                            
31639 ubuntu    20   0 1030m  99m 1444 R  4.0  5.9  61:47.82 pharo                              
 4314 ubuntu    20   0 1030m 162m 1504 S  2.0  9.7 140:28.55 pharo                              
 8014 ubuntu    20   0 1030m  77m 1512 S  2.0  4.6 561:06.30 pharo                              
31647 ubuntu    20   0 1030m  92m 1444 R  2.0  5.6  63:31.80 pharo                              
    1 root      20   0  3540 1392  732 S  0.0  0.1   0:58.61 init  

Sven

> Esteban A. Maringolo
> 
> 
> 2014-04-24 15:43 GMT-03:00 Norbert Hartl <norbert at hartl.name>:
>> I have a strange effect on my machines. I have a dedicated server and a lot of virtual instances using LXC. The last few days I migrated most projects of our projects from pharo2.0 to pharo3.0. And on the same time the images moved from an ubuntu 12.04. system to a ubuntu 14.04 system. Looking at the top command it appears the images/vms need noticable less CPU or better the tools report less. The monitored overall CPU usage also is much lesser than before.
>> 
>> This is not proved by any measurement. Has anyone an idea why this could happen or appear differently?
>> 
>> Norbert
>> 
> 

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