Messages in this thread | | | Date | Fri, 07 Nov 2008 17:51:08 +0100 | From | Eric Dumazet <> | Subject | Re: linux-2.6.28-rc2 regression : oprofile doesnt work anymore ? |
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Andi Kleen a écrit : > On Fri, Nov 07, 2008 at 05:12:33PM +0100, Eric Dumazet wrote: >> Andi Kleen a écrit : >>> On Fri, Nov 07, 2008 at 04:13:42PM +0100, Eric Dumazet wrote: >>>> Andi Kleen a écrit : >>>>> Can you please test this patch and see if it solves the problem? >>>>> >>>>> Thanks, >>>>> -Andi >>>>> >>>>> --- >>>>> >>>>> oprofile: Fix p6 counter overflow check >>>>> >>>>> Fix the counter overflow check for CPUs with counter width > 32 >>>>> >>>>> I had a similar change in a different patch that I didn't submit >>>>> and I didn't notice the problem earlier because it was always >>>>> tested together. >>>>> >>>>> Signed-off-by: Andi Kleen <ak@linux.intel.com> >>>>> >>>> Thanks Andi >>>> >>>> Unfortunatly, there is still a freeze of NMIS after a while. >>> How long is the while? >>> >> Less than 20 seconds if fully loaded with "tbench 8" on my 8 cpus machine. > > I don't have tbench on the test box, but when I load it with a couple > of while true ; do true ; done loops it also continues sampling. > > Are you sure it worked in 2.6.27?
You are right... I got same problem with 2.6.27.4, it seems...
$ grep NMI /proc/interrupts NMI: 423689 79703 1576236 580137 1405669 1187909 2923037 5163299 Non-maskable interrupts $ grep NMI /proc/interrupts NMI: 423689 79703 1576236 580137 1405669 1187909 2923037 5163299 Non-maskable interrupts
I'll try to find the faulty commit.
Thank you
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