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[107.215.223.229]) by smtp.gmail.com with ESMTPSA id c20sm22847420qtb.58.2022.02.16.15.49.19 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Wed, 16 Feb 2022 15:49:19 -0800 (PST) Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 15.0 \(3693.60.0.1.1\)) From: Bakul Shah In-Reply-To: <20220216224254.GA3040@mcvoy.com> Date: Wed, 16 Feb 2022 15:49:18 -0800 Content-Transfer-Encoding: quoted-printable Message-Id: References: <202202160754.21G7sbUa011318@freefriends.org> <1nKFRN-4IZ-00@marmaro.de> <8735kig8vb.fsf@vuxu.org> <20220216224254.GA3040@mcvoy.com> To: Larry McVoy X-Mailer: Apple Mail (2.3693.60.0.1.1) Subject: [TUHS] Benchmarks.... X-BeenThere: tuhs@minnie.tuhs.org X-Mailman-Version: 2.1.26 Precedence: list List-Id: The Unix Heritage Society mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: The Eunuchs Hysterical Society Errors-To: tuhs-bounces@minnie.tuhs.org Sender: "TUHS" > On Feb 16, 2022, at 2:42 PM, Larry McVoy wrote: >=20 > On Thu, Feb 17, 2022 at 09:27:39AM +1100, Dave Horsfall wrote: >> Indeed, when a lot of compilers recognised the Sieve of Eratosthenes = being=20 >> used and optimised for it... Wasn't all that long ago that vehicle=20= >> manufacturers also started doing the same thing :-) >=20 > Indeed. I hated when people cheated because benchmarks should teach = you > the capabilities of the machine being benchmarked. They aren't useful > if people cheat. >=20 > When I did LMbench, the rules were "cc -O2" and you could not link = with > any benchmarking libraries and you could only report a result if you > reported all results. >=20 > I had a beef with this guy: https://www.cs.jhu.edu/~shap/ because he > had some toy OS that didn't have a VM system, didn't have networking, > didn't have much of anything, but boy oh boy, did it context switch > fast (because there was no context to speak of). He reported those > numbers in blatant violation of my rules and I had to escalate to=20 > get him to stop. The bummer is he is a smart guy, capable of good > work, there is no need to cheat. My guess is, it was EROS, based on KeyKOS (or GNOSIS), a capability OS. It used the VM hardware to enforce capabilities so I imagine it did have a VM system! http://flint.cs.yale.edu/cs428/doc/eros.pdf The paper does say "microbenchmarks ... inspired by those of=20 lmbench". My guess is Jon Shapiro wanted to show off his system's nimbleness. Should not be seen as an apples to apples comparison with commercial Unix systems. [Don't want to reopen a microkernel/capability system discussion here though]