From: Andrew Morton <akpm@osdl.org>
To: Ingo Molnar <mingo@elte.hu>
Cc: trond.myklebust@fys.uio.no, rlrevell@joe-job.com,
linux-kernel@vger.kernel.org
Subject: Re: NFS client latencies
Date: Wed, 30 Mar 2005 11:53:26 -0800 [thread overview]
Message-ID: <20050330115326.3c291016.akpm@osdl.org> (raw)
In-Reply-To: <20050330142056.GA3043@elte.hu>
Ingo Molnar <mingo@elte.hu> wrote:
>
> > No. Coalescing on the client makes tons of sense. The overhead of
> > sending 8 RPC requests for 4k writes instead of sending 1 RPC request
> > for a single 32k write is huge: among other things, you end up tying up
> > 8 RPC slots on the client + 8 nfsd threads on the server instead of just
> > one of each.
>
> yes - coalescing a few pages makes sense, but linearly scanning
> thousands of entries is entirely pointless.
If each object has a unique ->wb_index then they could all be placed into a
radix tree rather than a list. Use the gang-lookup functions to perform
the sorting.
next prev parent reply other threads:[~2005-03-30 19:57 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-03-29 23:04 Lee Revell
2005-03-29 23:18 ` Trond Myklebust
2005-03-29 23:32 ` Lee Revell
2005-03-29 23:34 ` Trond Myklebust
2005-03-29 23:37 ` Lee Revell
2005-03-30 8:02 ` Ingo Molnar
2005-03-30 14:11 ` Trond Myklebust
2005-03-30 14:20 ` Ingo Molnar
2005-03-30 19:53 ` Andrew Morton [this message]
2005-03-30 14:26 ` Lee Revell
2005-03-30 14:50 ` Trond Myklebust
2005-03-30 19:50 ` Lee Revell
2005-03-30 19:56 ` Andrew Morton
2005-03-30 21:14 ` Trond Myklebust
2005-03-31 2:26 ` Lee Revell
2005-03-31 2:39 ` Andrew Morton
2005-03-31 2:47 ` Lee Revell
2005-03-31 3:48 ` Trond Myklebust
2005-03-31 6:59 ` Ingo Molnar
2005-03-31 7:15 ` Ingo Molnar
2005-03-31 7:18 ` Andrew Morton
2005-03-31 7:30 ` Ingo Molnar
2005-03-31 11:58 ` Trond Myklebust
2005-03-31 12:34 ` Trond Myklebust
2005-03-31 13:58 ` Ingo Molnar
2005-03-31 14:32 ` Trond Myklebust
2005-03-31 14:39 ` Ingo Molnar
2005-03-31 14:50 ` Ingo Molnar
2005-04-01 2:28 ` Lee Revell
2005-04-01 4:30 ` Ingo Molnar
2005-04-01 16:16 ` Orion Poplawski
2005-04-01 16:33 ` Trond Myklebust
2005-04-01 21:18 ` Lee Revell
2005-03-31 14:54 ` Ingo Molnar
2005-03-31 15:00 ` Trond Myklebust
2005-03-31 14:54 ` Trond Myklebust
2005-03-31 14:58 ` Ingo Molnar
2005-03-31 15:06 ` Trond Myklebust
2005-03-31 15:10 ` Ingo Molnar
2005-03-31 16:00 ` Trond Myklebust
2005-03-31 15:10 ` Ingo Molnar
2005-03-31 7:03 ` Ingo Molnar
2005-03-31 7:39 ` Ingo Molnar
2005-03-31 7:48 ` Ingo Molnar
2005-03-31 7:58 ` Ingo Molnar
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