From: Mark Cave-Ayland <email@example.com> To: BALATON Zoltan <firstname.lastname@example.org> Cc: email@example.com, firstname.lastname@example.org, email@example.com Subject: Re: [PATCH v2 2/3] grackle: use qdev gpios for PCI IRQs Date: Sat, 17 Oct 2020 14:03:55 +0100 Message-ID: <firstname.lastname@example.org> (raw) In-Reply-To: <email@example.com> On 16/10/2020 01:26, BALATON Zoltan via wrote: > As said in previous message the i2c and SPD patches are not quite ready yet so I've > omitted those from this series, I may rework them later once this part is merged and > can rebase the rest on top of that. We would also need your screamer patches to get > the Mac ROM working, what is still missing for those? The 2 main reasons for not merging the screamer patches so far are: 1) Hangs in MacOS 9.0 and 9.1 on startup Probably related to DBDMA interrupts, but I haven't had time to dig into this in much detail. 2) Reduced OS X emulation speed When OS X detects the sound hardware it enables its internal sound engine which does 2 things: firstly it constantly runs DBDMA requests which execute in the bottom-half even if no sound is being generated, so you end up reducing the raw emulation speed and secondly the OS X sound engine is floating point based so you end up running a lot more background floating point arithmetic in the OS. I'm open to further ideas as to how this can be improved. The DBDMA overhead could be reduced by running DBDMA in the iothread if that is possible but that would be a fair bit of work. ATB, Mark.
next prev parent reply index Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-10-13 11:49 [PATCH v2 0/3] ppc: Mac machine updates Mark Cave-Ayland 2020-10-13 11:49 ` [PATCH v2 1/3] macio: don't reference serial_hd() directly within the device Mark Cave-Ayland 2020-10-16 0:16 ` David Gibson 2020-10-16 7:00 ` Mark Cave-Ayland 2020-10-17 6:21 ` David Gibson 2020-10-13 11:49 ` [PATCH v2 2/3] grackle: use qdev gpios for PCI IRQs Mark Cave-Ayland 2020-10-13 13:37 ` Philippe Mathieu-Daudé 2020-10-13 16:51 ` Mark Cave-Ayland 2020-10-13 17:05 ` BALATON Zoltan via 2020-10-15 19:42 ` Mark Cave-Ayland 2020-10-16 0:26 ` BALATON Zoltan via 2020-10-17 13:03 ` Mark Cave-Ayland [this message] 2020-10-16 0:18 ` David Gibson 2020-10-16 6:45 ` Howard Spoelstra 2020-10-16 6:53 ` Mark Cave-Ayland 2020-10-17 6:20 ` David Gibson 2020-10-13 11:49 ` [PATCH v2 3/3] uninorth: " Mark Cave-Ayland 2020-10-13 13:38 ` BALATON Zoltan via 2020-10-13 16:58 ` Mark Cave-Ayland 2020-10-13 17:10 ` BALATON Zoltan via 2020-10-16 0:30 ` David Gibson 2020-10-13 13:39 ` Philippe Mathieu-Daudé 2020-10-16 0:21 ` David Gibson
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