From: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
To: Carsten Schiers <carsten@schiers.de>
Cc: Konrad Rzeszutek Wilk <konrad@darnok.org>,
xen-devel <xen-devel@lists.xensource.com>,
"lersek@redhat.com" <lersek@redhat.com>,
Ian Campbell <Ian.Campbell@citrix.com>,
"zhenzhong.duan@oracle.com" <zhenzhong.duan@oracle.com>
Subject: Re: Load increase after memory upgrade (part2)
Date: Mon, 5 Dec 2011 22:26:21 -0500 [thread overview]
Message-ID: <20111206032621.GA6568@phenom.dumpdata.com> (raw)
In-Reply-To: <zarafa.4edb62f8.6417.1a54a5c25b8f0fd7@uhura.space.zz>
On Sun, Dec 04, 2011 at 01:09:28PM +0100, Carsten Schiers wrote:
> Here with two cards enabled and creating a bit "work" by watching TV with one oft hem:
>
> [ 23.842720] Starting SWIOTLB debug thread.
> [ 23.842750] swiotlb_start_thread: Go!
> [ 23.842838] xen_swiotlb_start_thread: Go!
> [ 28.841451] 0 [budget_av 0000:00:01.0] bounce: from:435596(slow:0)to:0 map:658 unmap:0 sync:435596
> [ 28.841592] SWIOTLB is 4% full
> [ 33.840147] 0 [budget_av 0000:00:01.0] bounce: from:127652(slow:0)to:0 map:0 unmap:0 sync:127652
> [ 33.840283] SWIOTLB is 4% full
> [ 33.844222] 0 budget_av 0000:00:01.0 alloc coherent: 8, free: 0
> [ 38.840227] 0 [budget_av 0000:00:01.0] bounce: from:128310(slow:0)to:0 map:0 unmap:0 sync:128310
Whoa. Yes. You are definitly using the bounce buffer :-)
Now it is time to look at why the drive is not using those coherent ones - it
looks to allocate just eight of them but does not use them.. Unless it is
using them _and_ bouncing them (which would be odd).
And BTW, you can lower your 'swiotlb=XX' value. The 4% is how much you
are using of the default size.
I should find out_why_ the old Xen kernels do not use the bounce buffer
so much...
next prev parent reply other threads:[~2011-12-06 3:26 UTC|newest]
Thread overview: 66+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-11-24 12:28 Load increase after memory upgrade (part2) Carsten Schiers
2011-11-25 18:42 ` Konrad Rzeszutek Wilk
2011-11-25 22:11 ` Carsten Schiers
2011-11-28 15:28 ` Konrad Rzeszutek Wilk
2011-11-28 15:40 ` Ian Campbell
2011-11-28 16:45 ` Konrad Rzeszutek Wilk
2011-11-29 8:31 ` Jan Beulich
2011-11-29 9:31 ` Carsten Schiers
2011-11-29 9:46 ` Carsten Schiers
2011-11-29 10:23 ` Ian Campbell
2011-11-29 15:33 ` Konrad Rzeszutek Wilk
2011-12-02 15:23 ` Konrad Rzeszutek Wilk
2011-12-04 11:59 ` Carsten Schiers
2011-12-04 12:09 ` Carsten Schiers
2011-12-06 3:26 ` Konrad Rzeszutek Wilk [this message]
2011-12-14 20:23 ` Konrad Rzeszutek Wilk
2011-12-14 22:07 ` Konrad Rzeszutek Wilk
2011-12-15 14:52 ` Carsten Schiers
2011-12-16 14:56 ` Carsten Schiers
2011-12-16 15:04 ` Konrad Rzeszutek Wilk
2011-12-16 15:51 ` Carsten Schiers
2011-12-16 16:19 ` Konrad Rzeszutek Wilk
2011-12-17 22:12 ` Carsten Schiers
2011-12-18 0:19 ` Sander Eikelenboom
2011-12-19 14:56 ` Konrad Rzeszutek Wilk
2012-01-10 21:55 ` Konrad Rzeszutek Wilk
2012-01-12 22:06 ` Sander Eikelenboom
2012-01-13 8:12 ` Jan Beulich
2012-01-13 15:13 ` Konrad Rzeszutek Wilk
2012-01-15 11:32 ` Sander Eikelenboom
2012-01-17 21:02 ` Konrad Rzeszutek Wilk
2012-01-18 11:28 ` Pasi Kärkkäinen
2012-01-18 11:39 ` Jan Beulich
2012-01-18 11:35 ` Jan Beulich
2012-01-18 14:29 ` Konrad Rzeszutek Wilk
2012-01-23 22:32 ` Konrad Rzeszutek Wilk
2012-01-24 8:58 ` Jan Beulich
2012-01-24 14:17 ` Konrad Rzeszutek Wilk
2012-01-24 21:32 ` Carsten Schiers
2012-01-25 12:02 ` Carsten Schiers
2012-01-25 19:06 ` Carsten Schiers
2012-01-25 21:02 ` Konrad Rzeszutek Wilk
2012-02-15 19:28 ` Konrad Rzeszutek Wilk
2012-02-16 8:56 ` Jan Beulich
2012-02-17 15:07 ` Konrad Rzeszutek Wilk
2012-02-28 14:35 ` Carsten Schiers
2012-02-29 12:10 ` Carsten Schiers
2012-02-29 12:56 ` Carsten Schiers
2012-05-11 9:39 ` Carsten Schiers
2012-05-11 19:41 ` Konrad Rzeszutek Wilk
2012-06-13 16:55 ` Konrad Rzeszutek Wilk
2012-06-14 7:07 ` Jan Beulich
2012-06-14 18:33 ` Konrad Rzeszutek Wilk
2012-06-14 18:43 ` Carsten Schiers
2012-06-14 8:38 ` David Vrabel
2012-06-14 18:31 ` Konrad Rzeszutek Wilk
2012-06-14 18:40 ` Carsten Schiers
2012-06-14 19:16 ` Carsten Schiers
2011-12-19 14:54 ` Konrad Rzeszutek Wilk
2011-12-04 12:18 ` Carsten Schiers
2011-11-28 16:58 ` Laszlo Ersek
2011-11-29 9:37 ` Carsten Schiers
2011-11-28 15:52 ` Carsten Schiers
2011-11-26 9:14 ` Carsten Schiers
2011-11-28 15:30 ` Konrad Rzeszutek Wilk
2011-11-29 9:42 ` Carsten Schiers
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