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From: Dipankar Sarma <dipankar@in.ibm.com>
To: yodaiken@fsmlabs.com
Cc: Andrew Morton <akpm@digeo.com>,
	Ravikiran G Thirumalai <kiran@in.ibm.com>,
	linux-kernel@vger.kernel.org,
	Rusty Russell <rusty@rustcorp.com.au>
Subject: Re: [patch] kmalloc_percpu  -- 2 of 2
Date: Thu, 5 Dec 2002 18:11:53 +0530	[thread overview]
Message-ID: <20021205181153.C12588@in.ibm.com> (raw)
In-Reply-To: <20021205042312.A12616@hq.fsmlabs.com>; from yodaiken@fsmlabs.com on Thu, Dec 05, 2002 at 11:33:15AM +0000

On Thu, Dec 05, 2002 at 11:33:15AM +0000, yodaiken@fsmlabs.com wrote:
> 
> > 
> > Well, kernel objects may not be that small, but one would expect
> > the per-cpu parts of the kernel objects to be sometimes small, often down to
> > a couple of counters counting statistics.
> 
> 
> Doesn't your allocator increase chances of cache conflict on the same
> cpu ?
> 

You mean by increasing the footprint and the chance of eviction ? It
is a compromise. Or you would face NR_CPUS bloat and non-NUMA-node-local 
accesses for all CPUs outside the NUMA node where your NR_CPUS array
is located.

Thanks
-- 
Dipankar Sarma  <dipankar@in.ibm.com> http://lse.sourceforge.net
Linux Technology Center, IBM Software Lab, Bangalore, India.

  parent reply	other threads:[~2002-12-05 12:27 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2002-12-04 12:12 [patch] kmalloc_percpu -- 1 of 2 Ravikiran G Thirumalai
2002-12-04 12:15 ` [patch] kmalloc_percpu -- 2 " Ravikiran G Thirumalai
2002-12-04 19:34   ` Andrew Morton
2002-12-05  3:42     ` Dipankar Sarma
2002-12-05  4:32       ` Andrew Morton
2002-12-05  4:47         ` William Lee Irwin III
2002-12-05 10:53         ` Dipankar Sarma
2002-12-05 11:23           ` yodaiken
2002-12-05 11:28             ` William Lee Irwin III
2002-12-05 12:41             ` Dipankar Sarma [this message]
2002-12-05 15:08               ` yodaiken
2002-12-05 20:02           ` Andrew Morton
2002-12-05 21:23             ` Dipankar Sarma
2002-12-05 22:15               ` Andrew Morton
2002-12-09  5:30             ` Ravikiran G Thirumalai
2002-12-09  5:57               ` Andrew Morton
2002-12-09 19:28               ` Andrew Morton

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