From: Giuliano Pochini <pochini@denise.shiny.it>
To: Benjamin Herrenschmidt <bh40@calva.net>
Cc: linuxppc-dev@lists.linuxppc.org
Subject: Re: progress on l2cr
Date: Sat, 05 Aug 2000 23:25:10 -0400 [thread overview]
Message-ID: <398CDA96.C3CBE4C@denise.shiny.it> (raw)
In-Reply-To: 20000731184228.18405@192.168.1.10
> >> >Is there any reason to keep the L2 cache data-only ?
> >>
> >> There are some rare cases where it can be useful, yes. Like when flushing
> >> it, to avoid the flush code to pollute it.
> >
> >A few bytes inside a 1MB cache are't a problem IMHO. Anyway I enabled it and
> >performance compiling programs is 15% lower.
>
> You have no reason to enable "data only" in normal use. It's used during
> the flush cycle of the cache to avoid polluting it while the flush code
> runs, but it's set and unset automatically, so you don't need to care.
Ok, but /proc/.../l2cr tells it's data-only at boot.
Bye.
** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/
next prev parent reply other threads:[~2000-08-06 3:25 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2000-07-17 22:26 progress on l2cr Guillaume Laurès
2000-07-18 6:54 ` Guillaume Laurès
2000-07-18 8:03 ` Benjamin Herrenschmidt
2000-07-22 1:38 ` Giuliano Pochini
2000-07-22 20:13 ` Benjamin Herrenschmidt
2000-08-01 0:18 ` Giuliano Pochini
2000-07-31 18:42 ` Benjamin Herrenschmidt
2000-08-06 3:25 ` Giuliano Pochini [this message]
2000-08-06 9:33 ` Timothy A. Seufert
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