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From: Michael Schmitz <schmitzmic@gmail.com>
To: Finn Thain <fthain@telegraphics.com.au>,
	Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Kars de Jong <jongk@linux-m68k.org>,
	Philip Blundell <philb@gnu.org>,
	Andreas Schwab <schwab@linux-m68k.org>,
	Arnd Bergmann <arnd@arndb.de>,
	Stephen N Chivers <schivers@csc.com.au>,
	Thomas Gleixner <tglx@linutronix.de>,
	Daniel Lezcano <daniel.lezcano@linaro.org>,
	John Stultz <john.stultz@linaro.org>,
	Linus Walleij <linus.walleij@linaro.org>,
	linux-m68k <linux-m68k@lists.linux-m68k.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [RFC PATCH v2 09/14] m68k: hp300: Remove hp300_gettimeoffset()
Date: Sun, 25 Nov 2018 15:44:33 +1300	[thread overview]
Message-ID: <36b78174-5038-a1ac-4c70-d84a34edd275@gmail.com> (raw)
In-Reply-To: <alpine.LNX.2.21.1811250953120.10@nippy.intranet>

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
>

  reply	other threads:[~2018-11-25  2:44 UTC|newest]

Thread overview: 40+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-11-19  1:10 [RFC PATCH v2 00/14] m68k: Drop arch_gettimeoffset and adopt clocksource API Finn Thain
2018-11-19  1:10 ` [RFC PATCH v2 09/14] m68k: hp300: Remove hp300_gettimeoffset() Finn Thain
2018-11-20  9:09   ` Kars de Jong
2018-11-20 23:13     ` Finn Thain
2018-11-21  8:10       ` Geert Uytterhoeven
2018-11-21  8:41         ` Finn Thain
2018-11-21  8:55           ` Geert Uytterhoeven
2018-11-21  9:47             ` Finn Thain
2018-11-21 10:02               ` Geert Uytterhoeven
2018-11-21 11:14                 ` Finn Thain
2018-11-25  1:15                   ` Finn Thain
2018-11-25  2:44                     ` Michael Schmitz [this message]
2018-11-25  3:25                       ` Finn Thain
2018-11-21  8:22       ` Kars de Jong
2018-11-19  1:10 ` [RFC PATCH v2 07/14] m68k: atari: Convert to clocksource API Finn Thain
2018-11-19  8:35   ` Michael Schmitz
2018-11-20  8:10   ` Linus Walleij
2018-11-20  8:19     ` Geert Uytterhoeven
2018-11-20  9:30     ` Finn Thain
2018-11-20  9:53       ` Linus Walleij
2018-11-20 10:02     ` Andreas Schwab
2018-11-24  2:03       ` Michael Schmitz
2018-11-24  3:08         ` Finn Thain
2018-11-19  1:10 ` [RFC PATCH v2 08/14] m68k: bvme6000: " Finn Thain
2018-11-19  1:10 ` [RFC PATCH v2 11/14] m68k: mvme147: " Finn Thain
2018-11-19  1:10 ` [RFC PATCH v2 10/14] m68k: mac: " Finn Thain
2018-11-20  8:15   ` Linus Walleij
2018-11-20  9:00     ` Finn Thain
2018-11-20  9:59       ` Linus Walleij
2018-11-19  1:10 ` [RFC PATCH v2 04/14] m68k: apollo, q40, sun3, sun3x: Remove arch_gettimeoffset implementations Finn Thain
2018-11-19  1:10 ` [RFC PATCH v2 01/14] m68k: Call timer_interrupt() with interrupts disabled Finn Thain
2018-11-19  1:10 ` [RFC PATCH v2 03/14] m68k: mac: Clean up unused timer definitions Finn Thain
2018-11-20  1:02   ` Finn Thain
2018-11-19  1:10 ` [RFC PATCH v2 12/14] m68k: mvme147: Handle timer counter overflow Finn Thain
2018-11-19  1:10 ` [RFC PATCH v2 13/14] m68k: mvme16x: Convert to clocksource API Finn Thain
2018-11-19  1:10 ` [RFC PATCH v2 02/14] m68k: mac: Fix VIA timer counter accesses Finn Thain
2018-11-19  1:10 ` [RFC PATCH v2 06/14] m68k: amiga: Convert to clocksource API Finn Thain
2018-11-20  8:04   ` Linus Walleij
2018-11-19  1:10 ` [RFC PATCH v2 05/14] m68k: Drop ARCH_USES_GETTIMEOFFSET Finn Thain
2018-11-19  1:10 ` [RFC PATCH v2 14/14] m68k: mvme16x: Handle timer counter overflow Finn Thain

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