Re: Performance monitoring (was: Efficiency of in-order vs. OoO)

In article <2024Mar26.174702@mips.complang.tuwien.ac.at>,
anton@mips.complang.tuwien.ac.at (Anton Ertl) wrote:

scott@slp53.sl.home (Scott Lurndal) writes:

Their target is not application analysis.

 
This sounds like hardware folks that are only concerned with
memory-bound programs.

There can be considerable confusion on this point. In the early days of
Intel VTune, it would only work on small and simple programs, but Intel
sent one of the lead developers to visit the UK with it, expecting that
it would instantly find huge speed-ups in my employers' code.

What happened was that VTune crashed almost instantly when faced with
something that large, and Intel learned about the difference between
microarchitecture analysis and application analysis.

John