Re: C3600 kernel/64bit 4.* slow IO due to -mlong-calls

To: Helge Deller <deller@gmx.de>, debian-hppa@lists.debian.org
Cc: linux-parisc <linux-parisc@vger.kernel.org>
Subject: Re: C3600 kernel/64bit 4.* slow IO due to -mlong-calls
From: John David Anglin <dave.anglin@bell.net>
Date: Thu, 15 Mar 2018 16:51:56 -0400
Message-id: <[🔎] 113ad157-e8c3-81dc-5752-75416c8ce531@bell.net>
In-reply-to: <[🔎] d637ebd1-db27-585b-c324-0e02baf8c8b2@gmx.de>
References: <[🔎] CA+QBN9C=wHxV5Y=SSt2UB_4b1H_Nx1mZxZu3rvuTY2wRe=GWBw@mail.gmail.com> <[🔎] d637ebd1-db27-585b-c324-0e02baf8c8b2@gmx.de>

On 2018-03-15 4:43 PM, Helge Deller wrote:

kernel  gcc     binutils    with mlong    without mlong
4.15.7  4.9.3   2.25.1     13.4 MB/s    27.0 MB/s
4.15.7  6.4.0   2.25.1     13.4 MB/s    27.0 MB/s
4.15.7  6.4.0   2.29.1     14.4 MB/s    25.0 MB/s

Interesting bad results!

It's hard to understand why the performance would deteriorate so muchbut I see essentially

the same behavior.

Dave

--
John David Anglin  dave.anglin@bell.net

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Follow-Ups:
- Aw: Re: C3600 kernel/64bit 4.* slow IO due to -mlong-calls
  - From: "Helge Deller" <deller@gmx.de>

References:
- C3600 kernel/64bit 4.* slow IO due to -mlong-calls
  - From: Carlo Pisani <carlojpisani@gmail.com>
- Re: C3600 kernel/64bit 4.* slow IO due to -mlong-calls
  - From: Helge Deller <deller@gmx.de>

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