From: David Mosberger <davidm@napali.hpl.hp.com>
To: linux-ia64@vger.kernel.org
Subject: Re: Inefficient ia64 system call implementation in glibc
Date: Mon, 22 Sep 2003 21:25:36 +0000 [thread overview]
Message-ID: <marc-linux-ia64-106426598631350@msgid-missing> (raw)
In-Reply-To: <marc-linux-ia64-106398916511816@msgid-missing>
>>>>> On Sat, 20 Sep 2003 15:01:26 +0200, Andreas Schwab <schwab@suse.de> said:
Andreas> "Jim Hull" <jim.hull@hp.com> writes:
>> But my real issue with the performance of this code is not with
>> sign-extend or the scheduling these instructions, it's with the
>> break instruction. I may be mistaken, but hasn't it been many
>> months since David Mosberger implemented all the kernel
>> infrastructure needed to support syscalls using the epc
>> instruction?
Andreas> It's only implemented in 2.6 so far.
No, the glibc support is completely orthogonal to the kernel support.
If glibc uses the new stubs on a kernel which doesn't support
kernel-entry via EPC, it will transparently fall back to using BREAK.
--david
next prev parent reply other threads:[~2003-09-22 21:25 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-09-19 16:32 Inefficient ia64 system call implementation in glibc H. J. Lu
2003-09-19 17:29 ` Grant Grundler
2003-09-19 21:46 ` John Worley
2003-09-19 23:32 ` Jim Hull
2003-09-20 13:01 ` Andreas Schwab
2003-09-21 21:04 ` Richard Henderson
2003-09-22 19:39 ` H. J. Lu
2003-09-22 21:25 ` David Mosberger [this message]
2003-09-22 23:21 ` Richard Henderson
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