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Subject: Re: random_harvestq eats much on geode-lx alix2c3
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From: Mark Robert Vaughan Murray <markm@FreeBSD.org>
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Date: Tue, 19 Nov 2013 23:01:37 +0000
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To: =?utf-8?Q?Stanis=C5=82aw_Halik?= <sthalik@misaki.pl>
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On 19 Nov 2013, at 00:22, Stanis=C5=82aw Halik <sthalik@misaki.pl> =
wrote:

> Hey,
>=20
> random_harvestq eats much, much CPU on alix2c3:
>=20
> CPU: Geode(TM) Integrated Processor by AMD PCS (498.06-MHz 586-class =
CPU)
> glxsb0: <AMD Geode LX Security Block (AES-128-CBC, RNG)> mem=20
> 0xefff4000-0xefff7fff irq 9 at device 1.2 on pci0
>=20
> Could you please add a sysctl/loader knob for it, or a way to throttle=20=

> collection?
>=20
> Here's top output:
>=20
> 14 root          1 -16    -     0K     8K -        6:12  15.97% =
rand_harvestq

Take a look at random(4) - sysctls to turn off harvesting are documented =
there.

That is quite a busy harvestq - could you please give me some more =
details of what that box is and what it was doing at the time (numbers =
would be good!)

Thanks!

M
--=20
Mark R V Murray


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