Messages in this thread | | | Date | Fri, 19 Aug 2016 12:01:30 +0200 | From | Peter Zijlstra <> | Subject | Re: perf: fuzzer crashes immediately on AMD system |
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On Thu, Aug 18, 2016 at 10:46:31AM -0400, Vince Weaver wrote: > On Thu, 18 Aug 2016, Vince Weaver wrote: > > > Tried the perf_fuzzer on my A10 fam15h/model13h system with 4.8-rc2 and it > > falls over more or less immediately. > > > > This maps to variable_test_bit() > > called by ctx = find_get_context(pmu, task, event); > > in kernel/events/core.c:9467 > > > > It happens quickly enough I can probably track down the exact event that > > causes this, if needed. > > I have a one line reproducer: > > perf stat -a -e amd_nb/config=0x37,config1=0x20/ /bin/ls
OK, cannot reproduce on my fam15h/model1h. I'll go dig through the various manuals to see if I can spot the fail.
Huang could you either prod someone at AMD or do yourself, audit the AMD perf code for all the various new models?
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