From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Gabriel Paubert <paubert@iram.es>
Cc: ppc-dev <linuxppc-dev@ozlabs.org>,
Liu Dave-r63238 <DaveLiu@freescale.com>,
Paul Mackerras <paulus@samba.org>,
Kumar Gala <galak@gate.crashing.org>
Subject: Re: fsl booke MM vs. SMP questions
Date: Mon, 28 May 2007 20:28:19 +1000 [thread overview]
Message-ID: <1180348099.19517.81.camel@localhost.localdomain> (raw)
In-Reply-To: <20070528102327.GA9675@iram.es>
On Mon, 2007-05-28 at 12:23 +0200, Gabriel Paubert wrote:
> On SMP with single die and integrated memory controllers (PASemi),
> I'd bet that tlb invalidation broadcast is typically much cheaper
> since no external signals are involved (from a hardware point of view
> it's not very different from a store to a shared cache line that has
> to be invalidated in the cache of the other processors).
Except that is often has strong locking requirements along with a race
or two to deal with when not having a HW reload on the TLB. So in the
case of Freescale BookE, it is really something that should be measured.
Ben.
next prev parent reply other threads:[~2007-05-28 10:28 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-05-21 7:06 fsl booke MM vs. SMP questions Benjamin Herrenschmidt
[not found] ` <1179741447.3660.7.camel@localhost.localdomain>
[not found] ` <1179742083.32247.689.camel@localhost.localdomain>
2007-05-21 11:37 ` Dave Liu
2007-05-21 22:07 ` Benjamin Herrenschmidt
2007-05-22 3:09 ` Benjamin Herrenschmidt
2007-05-22 10:56 ` Dave Liu
2007-05-22 22:42 ` Benjamin Herrenschmidt
2007-05-23 2:38 ` Dave Liu
2007-05-23 3:08 ` Benjamin Herrenschmidt
2007-05-28 9:05 ` Liu Dave-r63238
2007-05-28 9:24 ` Benjamin Herrenschmidt
2007-05-28 9:37 ` Liu Dave-r63238
2007-05-28 10:00 ` Benjamin Herrenschmidt
2007-05-28 10:23 ` Gabriel Paubert
2007-05-28 10:28 ` Benjamin Herrenschmidt [this message]
2007-05-22 8:46 ` Gabriel Paubert
2007-05-22 9:14 ` Benjamin Herrenschmidt
2007-05-22 10:02 ` Gabriel Paubert
2007-05-22 10:05 ` Benjamin Herrenschmidt
2007-05-23 9:12 ` Gabriel Paubert
2007-05-22 3:03 ` Kumar Gala
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