On 12/08/2010 11:47 AM, Jason Clinton wrote: > On Tue, Dec 7, 2010 at 10:54, Prentice Bisbal <prent...@ias.edu > <mailto:prent...@ias.edu>> wrote: > > Can any of you recommend a good RAM stress testing tool? > > > We have an open source ISO/netboot image that can stress-test using the > latest Linux kernel EDAC facilities and HPL as the test code. It's > posted here: http://www.advancedclustering.com/software/breakin.html > > It's intended to be booted into. > > There's a beta of a slightly newer version posted at: > http://lab.advancedclustering.com/bootimage/ > > I would be interested in any feedback you have on either version.
Jason, I know breakin well. I used it a quite a bit a in 2008 when I was stress-testing my then-new cluster, and sent some feedback to the developer at the time (last name Shoemaker, I think). I did find that I could run it for days on all my cluster nodes, and then a few days later, when running a HPL as a single job across all the nodes, I'd get memory errors. I haven't used it since. Not because I don't like it, but I just haven't had a need for it since then. I've also been testing this node by running a single HPL job across all 32 cores myself, and even after days of doing this, I couldn't trigger any errors, but a user program could trigger an error in only a couple of hours. Based on these experiences, I don't think that HPL is good at stressing RAM.Has anyone else had similar experiences? Since this system has 128 GB of RAM, I think it's a good assumption that many programs might not use all of that RAM, so I need something memory specific that I know will hit all 128 GB of RAM. So far, mprime appears to be working. I was able to trigger an SBE in 21 hours the first time I ran it. I plan on running it repeatedly for the next few days to see how well it can repeat finding errors. -- Prentice Bisbal _______________________________________________ Beowulf mailing list, Beowulf@beowulf.org sponsored by Penguin Computing To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
