From: Benjamin Herrenschmidt <benh@au1.ibm.com>
To: "Tseng-Hui (Frank) Lin" <thlin@linux.vnet.ibm.com>
Cc: tsenglin@us.ibm.com, linuxppc-dev@ozlabs.org
Subject: Re: [PATCH v4 2/2] add icswx support
Date: Sat, 05 Mar 2011 10:13:59 +1100 [thread overview]
Message-ID: <1299280439.8833.918.camel@pasglop> (raw)
In-Reply-To: <1299280053.28840.96.camel@flin.austin.ibm.com>
On Fri, 2011-03-04 at 17:07 -0600, Tseng-Hui (Frank) Lin wrote:
> I don't have any measurable numbers. That's why I made it an option in
> case people wants to disable it. I do agree that the kernel has so many
> options that we should refrain from adding more. If the chance that the
> lazy switching slows down the execution is really low, we should just
> take out the option. Is there any one has an idea how much the numbers
> are?
Well, per-cpu loads are notoriously inefficient due to nasty codegen,
but often cache hot as well, I wouldn't worry too much. Just remove the
option for now. We can always add it back if it ever becomes desirable,
but I very much doubt it.
Cheers,
Ben.
prev parent reply other threads:[~2011-03-04 23:14 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-03-02 17:20 [PATCH v4 2/2] add icswx support Tseng-Hui (Frank) Lin
2011-03-04 1:02 ` Benjamin Herrenschmidt
2011-03-04 17:29 ` Tseng-Hui (Frank) Lin
2011-03-04 20:26 ` Benjamin Herrenschmidt
2011-03-04 22:22 ` Tseng-Hui (Frank) Lin
2011-03-04 22:40 ` Benjamin Herrenschmidt
2011-03-04 23:07 ` Tseng-Hui (Frank) Lin
2011-03-04 23:13 ` Benjamin Herrenschmidt [this message]
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