Messages in this thread | | | From | greg@enjellic ... | Date | Fri, 15 Jan 2010 07:55:22 -0600 | Subject | Re: Memory leak makes 'Blast the Bubbles' problematic. |
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On Jan 13, 6:56pm, Robert Hancock wrote: } Subject: Re: Memory leak makes 'Blast the Bubbles' problematic.
Hi Robert, thanks for the note. Good day to Andrew and everyone on the list.
> On 01/13/2010 09:48 AM, greg@enjellic.com wrote: > > Hi, hope the week is going well for everyone. > > > > Unless I miss my guess there is some type of leak or other memory > > anomaly starting in at least late model 2.6.31.x kernels. I took a > > snapshot of the behavior on 2.6.32.3 as well since I knew that > > 2.6.31.11 would be considered long in the tooth by all the informed > > intelligentia who would be looking at this...... :-)
> It looks like the system accumulated some more dcache entries, but > those should presumably get freed up if the system needs the > memory. The output of "vmstat 1" while the slowness is occurring > might be more interesting..
That was my analysis as well. I banged together a simple C program to malloc and dirty about 700 megabytes of memory. I ran a continuous vmstat while I ran the program and verified that all the dcache entries were forcibly evicted.
I'm going to have my wife play her games tonight to see if she senses a difference in performance on the machine. If her perception of responsiveness improves then I need to dig a bit more and see if performance degrades after the next updatedb run. If so the question becomes why her applications are not having the same effect
35 years in this business has taught me to pay a lot of attention to what a user feels the system is doing. After a fresh boot of the system she was perfectly content to play games all evening. 24 hours later I get the following.... :-)
> My memory has leaked out---help!!! thanks Kiss Iggs
Iggs is our Golden Retriever/her surrogate child BTW, who is sitting on my feet down here at the lake.... :-)
I will update everyone after this next round of testing.
Best wishes for a pleasant weekend to everyone.
Greg
}-- End of excerpt from Robert Hancock
As always, Dr. G.W. Wettstein, Ph.D. Enjellic Systems Development, LLC. 4206 N. 19th Ave. Specializing in information infra-structure Fargo, ND 58102 development. PH: 701-281-1686 FAX: 701-281-3949 EMAIL: greg@enjellic.com ------------------------------------------------------------------------------ "I use emacs, which might be thought of as a thermonuclear word processor." -- Neal Stephenson In the beginning... was the command line
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