Hi,
I have two questions about 'zeroing of samples' in 'perf top'.
I knew if I use 'perf top', I can see a performance counter profile in
real time.
But I can't find a difference between 'perf top -a' and 'perf top --zero'.
After 'perf top' is run , I press key 'z' to toggle zeroing of samples.
But I don't know a difference between when I press key 'z' and before I
did it.
1. What is 'Zero history' ?
(I saw it in Documentation/perf-top.txt that '--zero' option is 'Zero
history across display updates.')
2. What do 'zeroing of samples' mean ?
Thanks,
Taeung
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