From: Christoph Lameter <cl@linux.com>
To: Jesper Dangaard Brouer <brouer@redhat.com>
Cc: Alexander Duyck <alexander.duyck@gmail.com>,
netdev@vger.kernel.org, akpm@linux-foundation.org,
linux-mm@kvack.org, aravinda@linux.vnet.ibm.com,
"Paul E. McKenney" <paulmck@linux.vnet.ibm.com>,
iamjoonsoo.kim@lge.com
Subject: Re: [RFC PATCH 0/3] Network stack, first user of SLAB/kmem_cache bulk free API.
Date: Wed, 9 Sep 2015 09:08:47 -0500 (CDT) [thread overview]
Message-ID: <alpine.DEB.2.11.1509090907240.18992@east.gentwo.org> (raw)
In-Reply-To: <20150909145919.4d68ea36@redhat.com>
On Wed, 9 Sep 2015, Jesper Dangaard Brouer wrote:
> > Hmmm... Guess we need to come up with distinct version of kmalloc() for
> > irq and non irq contexts to take advantage of that . Most at non irq
> > context anyways.
>
> I agree, it would be an easy win. Do notice this will have the most
> impact for the slAb allocator.
>
> I estimate alloc + free cost would save:
> * slAb would save approx 60 cycles
> * slUb would save approx 4 cycles
>
> We might consider keeping the slUb approach as it would be more
> friendly for RT with less IRQ disabling.
IRQ disabling it a mixed bag. Older cpus have higher latencies there and
also virtualized contexts may require the hypervisor tracks the interrupt
state.
For recent intel cpus this is certainly a workable approach.
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@kvack.org. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
next prev parent reply other threads:[~2015-09-09 14:08 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-08-24 0:58 [PATCH V2 0/3] slub: introducing detached freelist Jesper Dangaard Brouer
2015-08-24 0:58 ` [PATCH V2 1/3] slub: extend slowpath __slab_free() to handle bulk free Jesper Dangaard Brouer
2015-08-24 0:59 ` [PATCH V2 2/3] slub: optimize bulk slowpath free by detached freelist Jesper Dangaard Brouer
2015-08-24 0:59 ` [PATCH V2 3/3] slub: build detached freelist with look-ahead Jesper Dangaard Brouer
2015-09-04 17:00 ` [RFC PATCH 0/3] Network stack, first user of SLAB/kmem_cache bulk free API Jesper Dangaard Brouer
2015-09-04 17:00 ` [RFC PATCH 1/3] net: introduce kfree_skb_bulk() user of kmem_cache_free_bulk() Jesper Dangaard Brouer
2015-09-04 18:47 ` Tom Herbert
2015-09-07 8:41 ` Jesper Dangaard Brouer
2015-09-07 16:25 ` Tom Herbert
2015-09-07 20:14 ` Jesper Dangaard Brouer
2015-09-08 21:01 ` David Miller
2015-09-04 17:01 ` [RFC PATCH 2/3] net: NIC helper API for building array of skbs to free Jesper Dangaard Brouer
2015-09-04 17:01 ` [RFC PATCH 3/3] ixgbe: bulk free SKBs during TX completion cleanup cycle Jesper Dangaard Brouer
2015-09-04 18:09 ` [RFC PATCH 0/3] Network stack, first user of SLAB/kmem_cache bulk free API Alexander Duyck
2015-09-04 18:55 ` Christoph Lameter
2015-09-04 20:39 ` Alexander Duyck
2015-09-04 23:45 ` Christoph Lameter
2015-09-05 11:18 ` Jesper Dangaard Brouer
2015-09-08 17:32 ` Christoph Lameter
2015-09-09 12:59 ` Jesper Dangaard Brouer
2015-09-09 14:08 ` Christoph Lameter [this message]
2015-09-07 8:16 ` Jesper Dangaard Brouer
2015-09-07 21:23 ` Alexander Duyck
2015-09-16 10:02 ` Experiences with slub bulk use-case for network stack Jesper Dangaard Brouer
2015-09-16 15:13 ` Christoph Lameter
2015-09-17 20:17 ` Jesper Dangaard Brouer
2015-09-17 23:57 ` Christoph Lameter
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=alpine.DEB.2.11.1509090907240.18992@east.gentwo.org \
--to=cl@linux.com \
--cc=akpm@linux-foundation.org \
--cc=alexander.duyck@gmail.com \
--cc=aravinda@linux.vnet.ibm.com \
--cc=brouer@redhat.com \
--cc=iamjoonsoo.kim@lge.com \
--cc=linux-mm@kvack.org \
--cc=netdev@vger.kernel.org \
--cc=paulmck@linux.vnet.ibm.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox