Em Wed, Nov 21, 2018 at 07:45:28AM +0000, Song Liu escreveu: > Hi, > > I found perf-record --tail-synthesize without --overwrite breaks symbols > for perf-script, perf-report, etc. For example: > > [root@]# ~/perf record -ag --tail-synthesize -- sleep 1 > [ perf record: Woken up 1 times to write data ] > [ perf record: Captured and wrote 1.129 MB perf.data (3531 samples) ] > [root@]# ~/perf script | head > swapper 0 [000] 1250675.051971: 1 cycles:ppp: > ffffffff81009e15 [unknown] ([unknown]) > ffffffff81196b19 [unknown] ([unknown]) > ffffffff81196579 [unknown] ([unknown]) > ffffffff81110ca7 [unknown] ([unknown]) > ffffffff81a01f4a [unknown] ([unknown]) > ffffffff81a017bf [unknown] ([unknown]) > ffffffff8180e17a [unknown] ([unknown]) > > perf-record with --overwrite does NOT have this issue. > > After digging into this, I found this issue is introduced by commit > a73e24d240bc136619d382b1268f34d75c9d25ce. > > Reverting this commit does fix this issue. However, on a second thought, > I feel it is probably better just drop --tail-synthesize, as it doesn't > make much sense without --overwrite. All we need is to do tail_synthesize > when --overwrite is set. > > Thoughts?
Wang, wdyt? - Arnaldo
