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Re: linux 2.1.117 built with egcs-1.1 19980823
- To: "David S. Miller" <davem at dm dot cobaltmicro dot com>
- Subject: Re: linux 2.1.117 built with egcs-1.1 19980823
- From: Jeffrey A Law <law at cygnus dot com>
- Date: Mon, 24 Aug 1998 22:21:03 -0600
- cc: ak at muc dot de, egcs at cygnus dot com
- Reply-To: law at cygnus dot com
In message <199808250415.VAA30418@dm.cobaltmicro.com>you write:
> Date: Mon, 24 Aug 1998 22:07:49 -0600
> From: Jeffrey A Law <law@hurl.cygnus.com>
>
> It would probably be to our advantage if you could select one of
> the datapoints from the bloat-o-meter chart and analyze it. Even
> superficial like "more spills than before" would be worth knowing.
>
> Finding this wouldn't surprise me as in other areas the Haifa
> scheduler has been shown to extend register lifetimes unduly.
But the scheduler is not run before allocation on the x86, so it should
not be an issue. See i386.c::optimization_options.
I'd put my money on loop changes increasing register pressure.
jeff