linux-kernel - Re: [PATCH v2 3/3] hw_random: increase schedule timeout in rng_dev

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Message-ID: <20140916170116.65f8d883@wiggum>
Date:	Tue, 16 Sep 2014 17:01:16 +0200
From:	Michael Büsch <m@...s.ch>
To:	Amos Kong <akong@...hat.com>
Cc:	virtualization@...ts.linux-foundation.org, kvm@...r.kernel.org,
	herbert@...dor.apana.org.au, mpm@...enic.com,
	rusty@...tcorp.com.au, amit.shah@...hat.com,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 3/3] hw_random: increase schedule timeout in
 rng_dev_read()

On Tue, 16 Sep 2014 08:27:40 +0800
Amos Kong <akong@...hat.com> wrote:

> Set timeout to 10:
>   non-smp guest with quick backend (1.2M/s) -> about 490K/s)

That sounds like an awful lot. This is a 60% loss in throughput.
I don't think we can live with that.

-- 
Michael

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