From: Vladimir Sokolovsky <vlad-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>
To: Sean Hefty <sean.hefty-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Cc: 'Hal Rosenstock'
<hal.rosenstock-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
Roland Dreier <rdreier-FYB4Gu1CFyUAvxtiuMwx3w@public.gmane.org>,
linux-rdma <linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>
Subject: Re: [PATCH 0/2] Add support for enhanced atomic operations
Date: Wed, 03 Feb 2010 10:01:43 +0200 [thread overview]
Message-ID: <4B692D67.5040006@dev.mellanox.co.il> (raw)
In-Reply-To: <F1F846D4754246DC862643839C4CB216-Zpru7NauK7drdx17CPfAsdBPR1lH4CV8@public.gmane.org>
Sean Hefty wrote:
>> Will Mellanox be adding this option to the IB spec rather than keep it
>> as vendor proprietary ?
>
> Along with that question, what is the use case for this feature? The only
> benefit mentioned was saving a few bytes of memory, at the cost of carrying
> extra network headers. Atomics are only 64-bits to begin with...
>
For some applications the memory savings are very significant. One
example is fine grain lock implementations for huge data sets. In other
cases, the benefit is the ability to update multiple fields with a
single io operation.
Regards,
Vladimir
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next prev parent reply other threads:[~2010-02-03 8:01 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-02-01 15:59 [PATCH 0/2] Add support for enhanced atomic operations Vladimir Sokolovsky
[not found] ` <4B66FA54.6030408-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>
2010-02-01 22:11 ` Sean Hefty
[not found] ` <52BD554704A742B18E3F2F8F2B00B9FE-Zpru7NauK7drdx17CPfAsdBPR1lH4CV8@public.gmane.org>
2010-02-02 10:44 ` Vladimir Sokolovsky
[not found] ` <4B68020D.4080401-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>
2010-02-02 15:54 ` Hal Rosenstock
[not found] ` <f0e08f231002020754h482ba0f7xe35a78a72cc165e8-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2010-02-02 16:13 ` Håkon Bugge
2010-02-03 0:02 ` Sean Hefty
[not found] ` <F1F846D4754246DC862643839C4CB216-Zpru7NauK7drdx17CPfAsdBPR1lH4CV8@public.gmane.org>
2010-02-03 8:01 ` Vladimir Sokolovsky [this message]
[not found] ` <4B692D67.5040006-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>
2010-02-11 14:08 ` Hal Rosenstock
[not found] ` <f0e08f231002110608y3a70c132r813d3472f82382d2-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2010-02-14 13:24 ` Vladimir Sokolovsky
2010-02-03 7:08 ` Tziporet Koren
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