Re: [PATCH V2 1/1] powerpc/perf: Fix PMU callbacks to clear pending PMI before resetting an overflown PMC

2021-05-23 Thread Athira Rajeev
> On 17-May-2021, at 8:50 AM, Nicholas Piggin wrote: > > Sorry I missed this :( > > Excerpts from Athira Rajeev's message of April 20, 2021 1:01 pm: >> Running perf fuzzer showed below in dmesg logs: >> "Can't find PMC that caused IRQ" >> >> This means a PMU exception happened, but none of

Re: [PATCH V2 1/1] powerpc/perf: Fix PMU callbacks to clear pending PMI before resetting an overflown PMC

2021-05-16 Thread Nicholas Piggin
Sorry I missed this :( Excerpts from Athira Rajeev's message of April 20, 2021 1:01 pm: > Running perf fuzzer showed below in dmesg logs: > "Can't find PMC that caused IRQ" > > This means a PMU exception happened, but none of the PMC's (Performance > Monitor Counter) were found to be overflown.

[PATCH V2 1/1] powerpc/perf: Fix PMU callbacks to clear pending PMI before resetting an overflown PMC

2021-04-19 Thread Athira Rajeev
Running perf fuzzer showed below in dmesg logs: "Can't find PMC that caused IRQ" This means a PMU exception happened, but none of the PMC's (Performance Monitor Counter) were found to be overflown. There are some corner cases that clears the PMCs after PMI gets masked. In such cases, the perf