From: "Roger Pau Monné" <roger.pau@citrix.com>
To: Jan Beulich <JBeulich@suse.com>
Cc: "xen-devel@lists.xen.org" <xen-devel@lists.xen.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [Xen-devel] [PATCH RFC 00/12] xen-block: indirect descriptors
Date: Thu, 28 Feb 2013 12:44:35 +0100 [thread overview]
Message-ID: <512F4323.50607@citrix.com> (raw)
In-Reply-To: <512F4F0102000078000C1EB8@nat28.tlf.novell.com>
On 28/02/13 12:35, Jan Beulich wrote:
>>>> On 28.02.13 at 12:25, Roger Pau Monné<roger.pau@citrix.com> wrote:
>> This is the expanded graph that also contains indirect descriptors
>> without persistent grants:
>>
>> http://xenbits.xen.org/people/royger/plot_indirect_nopers.png
>
> Thanks. Interesting - this suggests an unexpectedly high hit rate.
This graph is using the default values, so we are persistently mapping
1024 grants of the possible 2080 that could be used by blkfront ((64
segments + 1 indirect gref) * 32 = 2080).
blkfront stores grants using a stack, so it should try to reuse the same
grants as much as possible. On the other hand, blkback cleans unused
grants periodically, to try to have the most commonly used blkfront
grants mapped.
prev parent reply other threads:[~2013-02-28 11:44 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-02-28 10:28 [PATCH RFC 00/12] xen-block: indirect descriptors Roger Pau Monne
2013-02-28 10:28 ` [PATCH RFC 01/12] xen-blkback: don't store dev_bus_addr Roger Pau Monne
2013-02-28 10:58 ` [Xen-devel] " Jan Beulich
2013-03-04 17:19 ` Roger Pau Monné
2013-03-05 8:06 ` Jan Beulich
2013-03-05 17:02 ` Roger Pau Monné
2013-02-28 10:28 ` [PATCH RFC 02/12] xen-blkback: fix foreach_grant_safe to handle empty lists Roger Pau Monne
2013-02-28 10:28 ` [PATCH RFC 03/12] xen-blkfront: switch from llist to list Roger Pau Monne
2013-02-28 10:28 ` [PATCH RFC 04/12] xen-blkfront: pre-allocate pages for requests Roger Pau Monne
2013-03-04 19:39 ` Konrad Rzeszutek Wilk
2013-03-05 11:04 ` Roger Pau Monné
2013-03-05 14:18 ` Konrad Rzeszutek Wilk
2013-03-05 16:30 ` Roger Pau Monné
2013-03-05 21:53 ` Konrad Rzeszutek Wilk
2013-03-06 9:17 ` Roger Pau Monné
2013-02-28 10:28 ` [PATCH RFC 05/12] xen-blkfront: remove frame list from blk_shadow Roger Pau Monne
2013-02-28 10:28 ` [PATCH RFC 06/12] xen-blkback: implement LRU mechanism for persistent grants Roger Pau Monne
2013-03-04 20:10 ` Konrad Rzeszutek Wilk
2013-03-05 18:10 ` Roger Pau Monné
2013-03-05 21:49 ` Konrad Rzeszutek Wilk
2013-03-18 17:00 ` Roger Pau Monné
2013-02-28 10:28 ` [PATCH RFC 07/12] xen-blkback: print stats about " Roger Pau Monne
2013-02-28 10:28 ` [PATCH RFC 08/12] xen-blkback: use balloon pages for all mappings Roger Pau Monne
2013-03-04 20:22 ` Konrad Rzeszutek Wilk
2013-03-26 17:30 ` Roger Pau Monné
2013-03-26 17:48 ` Roger Pau Monné
2013-02-28 10:28 ` [PATCH RFC 09/12] xen-blkback: move pending handles list from blkbk to pending_req Roger Pau Monne
2013-02-28 11:07 ` [Xen-devel] " Jan Beulich
2013-02-28 10:28 ` [PATCH RFC 10/12] xen-blkback: make the queue of free requests per backend Roger Pau Monne
2013-02-28 11:08 ` [Xen-devel] " Jan Beulich
2013-02-28 10:28 ` [PATCH RFC 11/12] xen-blkback: expand map/unmap functions Roger Pau Monne
2013-02-28 10:28 ` [PATCH RFC 12/12] xen-block: implement indirect descriptors Roger Pau Monne
2013-02-28 11:19 ` [Xen-devel] " Jan Beulich
2013-02-28 12:00 ` Roger Pau Monné
2013-02-28 13:28 ` Jan Beulich
2013-03-04 20:44 ` Konrad Rzeszutek Wilk
2013-03-05 8:11 ` Jan Beulich
2013-03-05 14:16 ` Konrad Rzeszutek Wilk
2013-03-05 17:00 ` Roger Pau Monné
2013-03-05 21:45 ` Konrad Rzeszutek Wilk
2013-03-04 20:41 ` Konrad Rzeszutek Wilk
2013-03-05 17:07 ` Roger Pau Monné
2013-03-05 21:46 ` Konrad Rzeszutek Wilk
2013-03-08 17:07 ` Roger Pau Monné
2013-03-22 1:10 ` Konrad Rzeszutek Wilk
2013-03-18 17:06 ` Roger Pau Monné
2013-03-19 14:38 ` Konrad Rzeszutek Wilk
2013-02-28 10:49 ` [Xen-devel] [PATCH RFC 00/12] xen-block: " Jan Beulich
2013-02-28 11:25 ` Roger Pau Monné
2013-02-28 11:35 ` Jan Beulich
2013-02-28 11:44 ` Roger Pau Monné [this message]
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