From: Finn Thain <fthain@telegraphics.com.au>
To: Michael Schmitz <schmitzmic@gmail.com>
Cc: Geert Uytterhoeven <geert@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>,
linux-m68k <linux-m68k@lists.linux-m68k.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Philip Blundell <philb@gnu.org>,
Joshua Thompson <funaho@jurai.org>
Subject: Re: [RFC PATCH 06/13] m68k: Drop ARCH_USES_GETTIMEOFFSET
Date: Wed, 14 Nov 2018 09:11:41 +1100 (AEDT) [thread overview]
Message-ID: <alpine.LNX.2.21.1811140905440.371@nippy.intranet> (raw)
In-Reply-To: <0054c37f-ef34-e892-ff1d-02968ab529fa@gmail.com>
On Tue, 13 Nov 2018, Michael Schmitz wrote:
>
> Running a recent kernel under ARAnyM shows 40 ns resolution so the Atari
> hardware emulation is a little more complete.
>
You mean, 40 us resolution, right?
> Using that for initial tests, I can confirm that timer resolution is
> reduced to 10ms after patch 6, and gets restored to 40ns after applying
> the full series
Thanks for testing!
> (once clocksource_init runs, that is - the first part of the boot is at
> 10ms resolution only, a regression compared to with use of
> arch_gettimeoffset).
>
Sounds like a theoretical regression (?)
Is there any need for more precise timers (I mean, better than 40 us)
before clocksource_init runs?
> Unfortunately, I can't log in at the console with all patches applied. I
> immediately get the 'login timeout exceeded' message. Weird...
>
I didn't see that in my tests... Was this aranym or real hardware or both?
Can you also test tree fbf8405cd982 please?
--
> Cheers,
>
> Michael
>
>
next prev parent reply other threads:[~2018-11-13 22:11 UTC|newest]
Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-12 4:12 [RFC PATCH 00/13] m68k: Drop arch_gettimeoffset and adopt clocksource API Finn Thain
2018-11-12 4:12 ` [RFC PATCH 08/13] m68k: atari: Convert to " Finn Thain
2018-11-12 4:12 ` [RFC PATCH 04/13] m68k: mac: Clean up unused timer definitions Finn Thain
2018-11-12 4:12 ` [RFC PATCH 10/13] m68k: hp300: Convert to clocksource API Finn Thain
2018-11-12 4:12 ` [RFC PATCH 11/13] m68k: mac: " Finn Thain
2018-11-12 4:12 ` [RFC PATCH 01/13] arm: Fix mutual exclusion in arch_gettimeoffset Finn Thain
2018-11-12 8:34 ` Christoph Hellwig
2018-11-13 3:39 ` Finn Thain
2018-11-13 9:20 ` Russell King - ARM Linux
2018-11-13 21:55 ` Finn Thain
2018-11-13 23:43 ` Russell King - ARM Linux
2018-11-14 1:35 ` Michael Schmitz
2018-11-14 7:58 ` Russell King - ARM Linux
2018-11-15 1:34 ` Michael Schmitz
2018-11-14 3:17 ` Finn Thain
2018-11-14 14:16 ` Russell King - ARM Linux
2018-11-14 14:58 ` Geert Uytterhoeven
2018-11-14 18:11 ` Russell King - ARM Linux
2018-11-15 4:12 ` Finn Thain
2018-11-16 17:47 ` Russell King - ARM Linux
2018-11-16 22:49 ` Finn Thain
2018-11-17 3:00 ` Michael Schmitz
2018-11-14 12:05 ` Russell King - ARM Linux
2018-11-12 4:12 ` [RFC PATCH 02/13] m68k: " Finn Thain
2018-11-12 4:12 ` [RFC PATCH 07/13] m68k: amiga: Convert to clocksource API Finn Thain
2018-11-12 9:02 ` Geert Uytterhoeven
2018-11-12 9:21 ` Finn Thain
2018-11-12 4:12 ` [RFC PATCH 09/13] m68k: bvme6000: " Finn Thain
2018-11-12 4:12 ` [RFC PATCH 06/13] m68k: Drop ARCH_USES_GETTIMEOFFSET Finn Thain
2018-11-12 9:00 ` Geert Uytterhoeven
2018-11-12 9:06 ` Finn Thain
2018-11-13 2:29 ` Michael Schmitz
2018-11-13 3:14 ` Finn Thain
2018-11-13 4:50 ` Michael Schmitz
2018-11-13 6:15 ` Finn Thain
2018-11-13 8:24 ` Michael Schmitz
2018-11-13 22:11 ` Finn Thain [this message]
2018-11-14 1:08 ` Michael Schmitz
2018-11-14 2:58 ` Michael Schmitz
2018-11-14 23:54 ` Michael Schmitz
2018-11-15 4:37 ` Finn Thain
2018-11-15 6:35 ` Michael Schmitz
2018-11-16 0:04 ` Finn Thain
2018-11-12 4:12 ` [RFC PATCH 13/13] m68k: mvme16x: Convert to clocksource API Finn Thain
2018-11-12 18:37 ` Thomas Gleixner
2018-11-13 0:11 ` Finn Thain
2018-11-13 22:04 ` Finn Thain
2018-11-13 22:10 ` [RFC PATCH 13/13] m68k: mvme16x: Convert to clocksource APIy Thomas Gleixner
2018-11-13 22:33 ` Finn Thain
2018-11-18 17:12 ` Thomas Gleixner
2018-11-12 4:12 ` [RFC PATCH 03/13] m68k: mac: Fix VIA timer counter accesses Finn Thain
2018-11-12 4:12 ` [RFC PATCH 12/13] m68k: mvme147: Convert to clocksource API Finn Thain
2018-11-12 4:12 ` [RFC PATCH 05/13] m68k: apollo, q40, sun3, sun3x: Remove arch_gettimeoffset implementations Finn Thain
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