Re: [CentOS] pdflush kernel thread pops up every 10 seconds or so and video decoding grinds to a halt for 1/2 a second

On Mon, 2010-10-18 at 18:25 -0700, Aleksey Tsalolikhin wrote:

Hi. A friend of mine was doing real-time video decoding on Fedora Core 13 and he had a performance glitch (1/2 a second freeze) every 5-10 seconds. "top" showed flush-253:0 process at the moment of the freeze.

And what is the Priority of it running at? How many Cores also?

He also tried CentOS 5.5, and saw a "pdflush" process popping up with the same frequency, and resulting in a similar glitch.

Any other suggestions?

I would not even be concerned. ATM I am seeing pdflush on a server pop every second. load average: 4.51, 3.41, 3.51

I would only be concerned with the Freeze. What's uname -a on the CentOS machine?

John