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From: | Alex Bennée |
Subject: | Re: [Qemu-devel] [PATCH v1 00/14] fp-test + hostfloat |
Date: | Thu, 22 Mar 2018 08:56:36 +0000 |
User-agent: | mu4e 1.1.0; emacs 26.0.91 |
Emilio G. Cota <address@hidden> writes: <snip> > For performance numbers see the last patch. Just another random data point as we've been using himeno for our SVE wor: Master: 8:05:45 address@hidden:~/l/q/qemu.git] master ± ./aarch64-linux-user/qemu-aarch64 sve.demo/himeno-v80 mimax = 129 mjmax = 65 mkmax = 65 imax = 128 jmax = 64 kmax =64 cpu : 33.430299 sec. Loop executed for 200 times Gosa : 1.688752e-03 MFLOPS measured : 98.519585 Score based on MMX Pentium 200MHz : 3.052978 Host FPU: 08:25:03 address@hidden:~/l/q/qemu.git] master ± ./aarch64-linux-user/qemu-aarch64 sve.demo/himeno-v80 mimax = 129 mjmax = 65 mkmax = 65 imax = 128 jmax = 64 kmax =64 cpu : 15.067773 sec. Loop executed for 200 times Gosa : 1.688752e-03 MFLOPS measured : 218.581684 Score based on MMX Pentium 200MHz : 6.773526 Given SVE also beats v80 code thanks to avoiding marshalling overhead by doing bigger vectors I expect that improvement to be even better. Once the SVE patches are re-based I'll measure them. By the way I've been talking to some of the people at connect about tracking performance over time. I got pointed to LLVM's LNT tool (example: https://lnt.llvm.org/) so I might see if I can get a server set up that we can start pushing numbers to. Have you come across any other such things? -- Alex Bennée
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