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Re: [RFC PATCH v2] target/ppc: Enable hardfloat for PPC

From: BALATON Zoltan
Subject: Re: [RFC PATCH v2] target/ppc: Enable hardfloat for PPC
Date: Wed, 26 Feb 2020 12:28:21 +0100 (CET)
User-agent: Alpine 2.22 (BSF 395 2020-01-19)

On Wed, 26 Feb 2020, Programmingkid wrote:
I think a timeout takes place and that is why audio stops playing. It is probably an USB OHCI issue. The other USB controller seems to work better.

Which other USB controller? Maybe you could try enabling some usb_ohci* traces and see if they reveal anything.

The Amiga like OSes I'm interested in don't use multiple cores so I'm mainly interested in improving single core performance. Also I'm not sure if (part of) your problem is slow FPU preventing fast enough audio decoding then having multiple CPUs with slow FPU would help as this may use a single thread anyway.

Good point. MTTCG might be the option that really helps with speed improvements.

Only if you have multithreaded workload in the guest because AFAIK MTTCG only runs different vcpus in parallel, it won't make single emulated CPU faster in any way. OSX probably can benefit from having multiple cores emulated but I don't think MacOS would use it apart from some apps maybe.


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