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Re: PATCH: Always use ll/sc for mips
- From: Ralf Baechle <ralf at oss dot sgi dot com>
- To: "H. J. Lu" <hjl at lucon dot org>
- Cc: linux-mips at oss dot sgi dot com, GNU C Library <libc-alpha at sources dot redhat dot com>
- Date: Tue, 2 Jul 2002 22:06:51 +0200
- Subject: Re: PATCH: Always use ll/sc for mips
- References: <20020702114045.A16197@lucon.org>
On Tue, Jul 02, 2002 at 11:40:45AM -0700, H. J. Lu wrote:
> The ll/sc emulation is implemented in 2.4.0 and above. This patch makes
> glibc always use ll/sc.
Which means the overhead of two syscalls instead of one sysmips() call
for something that is assumed to be dirt cheap. R3000, R5900 etc.
users won't this patch you, which'll have significant impact on their
glibc performance.
Ralf