[Gllug] cpu percentage increasing
salsaman at xs4all.nl
Wed Sep 13 05:42:35 UTC 2006
> salsaman wrote:
>> salsaman wrote:
>>> Hi all,
>>> I have a question about a curious thing. I have a desktop system
>>> (dual AMD 64) which is basically running one app - a video
>>> application. I have it sitting there displaying two video clips,
>>> applying and effect an mixing them.
>>> What I see in ps is quite strange. The app starts at about 90% CPU
>>> usage, but slowly over time the usage goes up.
>>> Right now after about 8 hours, the usage is up to 97.6 %. Yet it's
>>> just doing the same task over and over.
>>> I've had (and fixed) problems with memory leakage before, but "CPU
>>> leakage" is a new one to me ! Is this normal, and if not what could
>>> be causing it ?
>> Here is the first few lines from "top":
>> top - 18:40:09 up 10:04, 3 users, load average: 1.21, 1.16, 1.10
>> Tasks: 69 total, 3 running, 65 sleeping, 0 stopped, 1 zombie
>> Cpu(s): 42.3% us, 8.0% sy, 0.0% ni, 49.7% id, 0.0% wa, 0.0% hi,
>> 0.0% si
>> Mem: 1026928k total, 1014852k used, 12076k free, 151696k buffers
>> Swap: 1028120k total, 2568k used, 1025552k free, 688460k cached
>> PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
>> 27736 foo 16 0 159m 29m 10m R 96.6 2.9 526:04.15 bar
>> 3062 root 15 0 79636 36m 7108 S 4.0 3.6 20:15.99 X
>> 27809 foo 17 0 35604 1764 1348 S 0.7 0.2 1:17.95 jackd
> BTW, it also seems strange to me that so much memory is being used.
> The main application "bar" is using around 150M, and X is using around
> 200M. The rest of the system amounts to maybe 100M.
> Can anyone explain these oddities ?
OK, the application seems to have topped out at 97.6 % CPU according to
"ps", although "top" now shows it using 99.9% !
What I am also seeing now is that "top" is showing me the amount of free
memory decreasing - it's now under 30MB.
None of the applications in "ps" seem to be leaking memory. Where is
this memory going ?
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