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From: jgd@cix.co.uk (John Dallman)
Newsgroups: comp.arch
Subject: Re: Efficiency of in-order vs. OoO
Date: Mon, 25 Mar 2024 20:22 +0000 (GMT Standard Time)
Organization: A noiseless patient Spider
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References: <2024Mar25.193535@mips.complang.tuwien.ac.at>
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In article <2024Mar25.193535@mips.complang.tuwien.ac.at>,
anton@mips.complang.tuwien.ac.at (Anton Ertl) wrote:
> scott@slp53.sl.home (Scott Lurndal) writes:
> >There is a significant demand for performance monitoring.   Note
> >that in addition to to standard performance monitoring registers,
> >AArch64 also (optionally) supports statistical profiling and
> >out-of-band instruction tracing (ETF).   The demand from users
> >is such that all those features are present in most designs.
> 
> Interesting.  I would have expected that the likes of me are few and
> far between, and easy to ignore for a big company like ARM, Intel 
> or AMD.

The question is if "users" to ARM Holdings are actual end-users, or the
SoC manufacturers who build chips incorporating Aarch64 cores. I'd expect
most of the latter to want those features so that they can understand the
performance of their silicon better. 

John