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Subject: Re: [RFC PATCH v2 09/14] m68k: hp300: Remove hp300_gettimeoffset()
To:     Finn Thain <fthain@telegraphics.com.au>,
        Geert Uytterhoeven <geert@linux-m68k.org>
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From:   Michael Schmitz <schmitzmic@gmail.com>
Message-ID: <36b78174-5038-a1ac-4c70-d84a34edd275@gmail.com>
Date:   Sun, 25 Nov 2018 15:44:33 +1300
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Hi Finn,

Am 25.11.2018 um 14:15 schrieb Finn Thain:
> Maybe the timer interrupt has a sufficiently high priority and latency is
> low? Maybe cia_set_irq() is really expensive?
>
> I don't know the platform well enough so I'm inclined to revert. We can
> benchmark gettimeofday syscalls on elgar but is that hardware
> representative of other relevant models?

I suppose the CIA is on the main board, so running with the slower clock 
speed that you'd see with a vanilla Amiga without 060 accelerator board. 
Ought to be representative enough?

Adrian has a few other Amigas with different hardware base, so we might 
be able to get test coverage on more than one model.

Cheers,

	Michael


> [1]
> https://github.com/mamedev/mame/commit/e2ed0490520f538c346c8bdaa9084bcbc43427cb
>
> [2]
> http://vice-emu.sourceforge.net/vice_9.html
>
> [3]
> https://www.commodore.ca/manuals/funet/cbm/documents/chipdata/cia6526.zip
>