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Date:      Thu, 30 Jan 2014 17:02:45 +0100
From:      Jeroen van der Ham <jeroen@dckd.nl>
To:        Karl Pielorz <kpielorz_lst@tdx.co.uk>
Cc:        freebsd-xen@freebsd.org
Subject:   Re: FreeBSD 10 under XenServer 6.2(SP1) - Higher load average?
Message-ID:  <35CC68FA-730F-4B74-94B8-EB612F7AF77E@dckd.nl>
In-Reply-To: <D1139674BFB81A81FF0C9AA4@Mail-PC.tdx.co.uk>
References:  <D1139674BFB81A81FF0C9AA4@Mail-PC.tdx.co.uk>

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Hi,

I=92ve noticed this already back in June: =
http://lists.freebsd.org/pipermail/freebsd-xen/2013-June/001639.html

Nothing really came out of the discussion there, but it doesn=92t really =
seem worrying or have much an impact on performance though.

Jeroen.



On 30 Jan 2014, at 15:10, Karl Pielorz <kpielorz_lst@tdx.co.uk> wrote:

>=20
> I've just installed a couple of FreeBSD 10-R instances on our Xen =
pool. The load averages on these machines seems to run higher for an =
idle box, than FreeBSD 9.x did
>=20
> e.g. 10.0-R (amd64 GENERIC):
>=20
> last pid:  4219;  load averages:  0.31,  0.23,  0.12 up 0+00:07:45  =
14:04:08
> 15 processes:  1 running, 14 sleeping
> CPU:  0.0% user,  0.0% nice,  0.0% system,  0.0% interrupt,  100% idle
> Mem: 16M Active, 15M Inact, 44M Wired, 20M Buf, 1893M Free
> Swap: 2046M Total, 2046M Free
>=20
>=20
> A 9.2-STABLE (amd64 XENHVM) instance on the same XenServer:
>=20
> last pid: 76440;  load averages:  0.00,  0.00,  0.00 up 2+15:07:27  =
14:05:10
> 22 processes:  1 running, 21 sleeping
> CPU:  0.0% user,  0.0% nice,  0.0% system,  0.0% interrupt,  100% idle
> Mem: 13M Active, 128M Inact, 91M Wired, 59M Buf, 237M Free
> Swap: 494M Total, 494M Free
>=20
>=20
> Both have xe-guest-utilities installed.
>=20
> The second box is actually technically busier than the first (as it's =
routing traffic between it's interfaces - admittedly, not much).
>=20
> But the load average on 10.0-R never settles to zero (like it did for =
9.x)
>=20
> Just a bit confused as to if the user, nice, system and interrupt =
times are zero - how can the LA be >0?
>=20
> Anyone else noticed this? - I know an LA of 0.31 isn't the end of the =
world - but it's a bit of a jump on 0.00...
>=20
> -Karl
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