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Path: ...!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail From: jgd@cix.co.uk (John Dallman) Newsgroups: comp.arch Subject: Re: Performance monitoring (was: Efficiency of in-order vs. OoO) Date: Tue, 26 Mar 2024 17:29 +0000 (GMT Standard Time) Organization: A noiseless patient Spider Lines: 18 Message-ID: <memo.20240326172954.1408K@jgd.cix.co.uk> References: <2024Mar26.174702@mips.complang.tuwien.ac.at> Reply-To: jgd@cix.co.uk Injection-Date: Tue, 26 Mar 2024 17:29:53 +0100 (CET) Injection-Info: dont-email.me; posting-host="8d52a550451f0c06704260c56212c0e8"; logging-data="2055975"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX1962BN/A27M0iuy8of225lSwFJqP6GMMLM=" Cancel-Lock: sha1:ENZdNK6xcIsa8xbfqiaWvX9VRcI= Bytes: 1653 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