strange CPU-load on JPG-export ?!

[maggus]

Hi,

typically, when exporting RAWs as JPGs the CPU-load of my 2 cores is constant at approx. 99..100% .... that´s fine.
But sometimes I can see the strange load-figure as shown in the attached screenshot .... is there something wrong ?
There´s no other activity on this machine at this time.

Code: Select all

Application vers.: 1.0.0.39
Product Name: AfterShot Pro Registered
Built on:     Tue Dec 27 2011
Platform:     Linux
Language:     en
App Path:     /opt/AfterShotPro/bin/AfterShotPro
System Home:  ../supportfiles
User Home:    /data/markus/.AfterShotPro
Prefs Home:   /home/markus/.config/Corel/AfterShot Pro.conf
Processors:   2
CPU Threads:  2
I/O Threads:  1
B. In-flight: 1
RAM:          1722 MB
SIMD Version: SSE2
Build Mode:   Release
Issue:        Welcome to openSUSE 11.4 "Celadon" - Kernel \r (\l).
Kernel:       Linux version 2.6.37.6-0.11-pae (geeko@buildhost) (gcc version 4.5.1 20101208 [gcc-4_5-branch revision 167585] (SUSE Linux) ) #1 SMP 2011-12-19 23:39:38 +0100

best regards
Markus

[afx]

Check your I/O stats and correlate with the CPU graph,

cheers
afx

[maggus]

Check your I/O stats and correlate with the CPU graph,
cheers
afx

Hi afx,

once you´re waiting for an issue to happen ... it refuses to show up again
I remember to have seen this already in the good old Bibble days ... but did not care for it.

Just a question about possible iostat params:
would a call like "iostat -m -t 1" be sufficient or are there specific params to be used ?
Whenever I see this phenomenon again I´ll try to capture iostat and follow up here, OK.

cheers and thanx
Markus

[afx]

You are taxing my memory.....
Haven't used iostat seriously in ages....

Looking at the man page I would think you have the right invocation.
Check the I/O waits...

cheers
afx