Closed andikleen closed 1 year ago
e.g. running the test suite on SKL client with a recent kernel leads to "mismatched events" messages.
Appears to be due to some weirdness (regression) with uncore events failing in the kernel.
perf stat -x\; -vv -o /dev/null -e 'msr/tsc/,uncore_arb/event=0x81,umask=0x1/' -o /dev/null sleep 1 echo 2 perf stat -x\; -v -o /dev/null -e 'uncore_arb/event=0x81,umask=0x1/' -o /dev/null sleep 1
The second works, the first fails with -22 error
For now the workaround is to use --no-uncore until we find a reliable workaround.
Doesn't happen anymore, but not sure what the fix was
e.g. running the test suite on SKL client with a recent kernel leads to "mismatched events" messages.
Appears to be due to some weirdness (regression) with uncore events failing in the kernel.
perf stat -x\; -vv -o /dev/null -e 'msr/tsc/,uncore_arb/event=0x81,umask=0x1/' -o /dev/null sleep 1 echo 2 perf stat -x\; -v -o /dev/null -e 'uncore_arb/event=0x81,umask=0x1/' -o /dev/null sleep 1
The second works, the first fails with -22 error
For now the workaround is to use --no-uncore until we find a reliable workaround.