Good afternoon,
When using perf to record a simple benchmark I see the following warning:
$ perf record --per-thread -e cs_etm/sinkid=0xa6509eae/u ~/afdo/coremark/coremark/coremark.exe 0x3415 0x3415 0x66 0 7 1 2000 > run2.log [ perf record: Woken up 6 times to write data ] Warning: AUX data lost 6 times out of 6!
[ perf record: Captured and wrote 0.378 MB perf.data ]
This is on DB845c (https://www.96boards.org/product/rb3-platform/), kernel 5.5.0-rc7.
It looks like perf is losing data and the reported perf.data file is very tiny, given that the application runs for several seconds. Does anybody have any idea about what it may be causing this?
I've tried adding --mmap-pages=32K,64K to the command for increasing the buffer size, but it's not actually solving the problem
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