Appended data not reportable
With kernel/perf 3.7.1, trying to do something akin to the "sum" option of gprof to pool the samples from multiple runs.
This option from the perf-record man page looked promising:
-A, --append
Append to the output file to do incremental profiling.
bash-4.2$ perf record -F 1000 ./app
bash-4.2$ perf record -F 1000 -A ./app
perf.data gets bigger, but then neither perf report nor perf script work. Both say:0x1a0 [0]: failed to process type: 0
Is this a regression?
Thanks,
Signature · 1 line
David Flater, National Institute of Standards and Technology, U.S.A.
Quoted 7 lines · David Flater
With kernel/perf 3.7.1, trying to do something akin to the "sum" option of gprof to pool the samples from multiple runs.
This option from the perf-record man page looked promising:
-A, --append
Append to the output file to do incremental profiling.
Quoted 8 lines
bash-4.2$ perf record -F 1000 ./app
bash-4.2$ perf record -F 1000 -A ./appperf.data gets bigger, but then neither perf report nor perf script work. Both say:
0x1a0[0]: failed to process type: 0Is this a regression?
It's been broken for a long time now.
David