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A comment on Linux Performance Analysis. Parent comment

Re:Linux Performance Analysis by odaymansour on Tuesday December 01, 2015 @04:16PM (#10658834)
I've identified a memory bandwidth issue in the past by keeping an eye on truss/strace output and "counting" mem operations.

After that, I compiled and ran a tiny executable called Stream[1] and got the numbers I needed in order to explain why one machine was twice as slow as another.

[1] http://www.cs.virginia.edu/stream/

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Re:Linux Performance Analysis by brendangregg on Wednesday December 02, 2015 @04:50AM (#10661958)
Using truss/strace to figure out memory bandwidth issues sounds pretty unreliable. I would not have guessed there was much correlation between memory syscalls that truss/strace can observe (mmap/munmap, brk), and the CPU load/stores that consume memory bandwidth.
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