From: Seth Jennings <sjenning@linux.vnet.ibm.com>
To: konrad@darnok.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Andrew Morton <akpm@linux-foundation.org>,
Dan Magenheimer <dan.magenheimer@oracle.com>,
Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>,
Nitin Gupta <ngupta@vflare.org>, Minchan Kim <minchan@kernel.org>,
Robert Jennings <rcj@linux.vnet.ibm.com>,
linux-mm@kvack.org, devel@driverdev.osuosl.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 3/3] x86: add local_tlb_flush_kernel_range()
Date: Tue, 26 Jun 2012 08:39:07 -0500 [thread overview]
Message-ID: <4FE9BB7B.2050009@linux.vnet.ibm.com> (raw)
In-Reply-To: <CAPbh3rvkKZOuGh_Pn9WpeV5_=vA=k9=x17oa2GoT8fEgRMr+WQ@mail.gmail.com>
On 06/25/2012 06:01 PM, Konrad Rzeszutek Wilk wrote:
> On Mon, Jun 25, 2012 at 12:14 PM, Seth Jennings
> <sjenning@linux.vnet.ibm.com> wrote:
>> This patch adds support for a local_tlb_flush_kernel_range()
>> function for the x86 arch. This function allows for CPU-local
>> TLB flushing, potentially using invlpg for single entry flushing,
>> using an arch independent function name.
>
> What x86 hardware did you use to figure the optimal number?
Actually I didn't. I used Alex Shi's numbers.
https://lkml.org/lkml/2012/6/25/39
"Like some machine in my hands, balance points is 16 entries
on Romely-EP; while it is at 8 entries on Bloomfield NHM-EP;
and is 256 on IVB mobile CPU. but on model 15 core2 Xeon
using invlpg has nothing help.
For untested machine, do a conservative optimization, same
as NHM CPU."
--
Seth
WARNING: multiple messages have this Message-ID (diff)
From: Seth Jennings <sjenning@linux.vnet.ibm.com>
To: konrad@darnok.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Andrew Morton <akpm@linux-foundation.org>,
Dan Magenheimer <dan.magenheimer@oracle.com>,
Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>,
Nitin Gupta <ngupta@vflare.org>, Minchan Kim <minchan@kernel.org>,
Robert Jennings <rcj@linux.vnet.ibm.com>,
linux-mm@kvack.org, devel@driverdev.osuosl.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 3/3] x86: add local_tlb_flush_kernel_range()
Date: Tue, 26 Jun 2012 08:39:07 -0500 [thread overview]
Message-ID: <4FE9BB7B.2050009@linux.vnet.ibm.com> (raw)
In-Reply-To: <CAPbh3rvkKZOuGh_Pn9WpeV5_=vA=k9=x17oa2GoT8fEgRMr+WQ@mail.gmail.com>
On 06/25/2012 06:01 PM, Konrad Rzeszutek Wilk wrote:
> On Mon, Jun 25, 2012 at 12:14 PM, Seth Jennings
> <sjenning@linux.vnet.ibm.com> wrote:
>> This patch adds support for a local_tlb_flush_kernel_range()
>> function for the x86 arch. This function allows for CPU-local
>> TLB flushing, potentially using invlpg for single entry flushing,
>> using an arch independent function name.
>
> What x86 hardware did you use to figure the optimal number?
Actually I didn't. I used Alex Shi's numbers.
https://lkml.org/lkml/2012/6/25/39
"Like some machine in my hands, balance points is 16 entries
on Romely-EP; while it is at 8 entries on Bloomfield NHM-EP;
and is 256 on IVB mobile CPU. but on model 15 core2 Xeon
using invlpg has nothing help.
For untested machine, do a conservative optimization, same
as NHM CPU."
--
Seth
--
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next prev parent reply other threads:[~2012-06-26 13:46 UTC|newest]
Thread overview: 68+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-06-25 16:14 [PATCH 0/3] zsmalloc: remove x86 dependency Seth Jennings
2012-06-25 16:14 ` Seth Jennings
2012-06-25 16:14 ` [PATCH 1/3] zram/zcache: swtich Kconfig dependency from X86 to ZSMALLOC Seth Jennings
2012-06-25 16:14 ` Seth Jennings
2012-06-27 2:37 ` Minchan Kim
2012-06-27 2:37 ` Minchan Kim
2012-06-27 2:43 ` Greg Kroah-Hartman
2012-06-27 2:43 ` Greg Kroah-Hartman
2012-06-27 2:49 ` Minchan Kim
2012-06-27 2:49 ` Minchan Kim
2012-06-27 3:21 ` Greg Kroah-Hartman
2012-06-27 3:21 ` Greg Kroah-Hartman
2012-06-27 15:40 ` Konrad Rzeszutek Wilk
2012-06-27 15:40 ` Konrad Rzeszutek Wilk
2012-06-27 18:55 ` Greg Kroah-Hartman
2012-06-27 18:55 ` Greg Kroah-Hartman
2012-06-27 18:52 ` Konrad Rzeszutek Wilk
2012-06-27 18:52 ` Konrad Rzeszutek Wilk
2012-06-27 19:29 ` Greg Kroah-Hartman
2012-06-27 19:29 ` Greg Kroah-Hartman
2012-06-25 16:14 ` [PATCH 2/3] zsmalloc: add generic path and remove x86 dependency Seth Jennings
2012-06-25 16:14 ` Seth Jennings
2012-06-25 16:59 ` Greg Kroah-Hartman
2012-06-25 16:59 ` Greg Kroah-Hartman
2012-06-25 17:10 ` Seth Jennings
2012-06-25 17:10 ` Seth Jennings
2012-06-25 17:19 ` Greg Kroah-Hartman
2012-06-25 17:19 ` Greg Kroah-Hartman
2012-06-25 18:24 ` Seth Jennings
2012-06-25 18:24 ` Seth Jennings
2012-06-25 23:37 ` Greg Kroah-Hartman
2012-06-25 23:37 ` Greg Kroah-Hartman
2012-06-27 5:28 ` Minchan Kim
2012-06-27 5:28 ` Minchan Kim
2012-06-27 19:09 ` Seth Jennings
2012-06-27 19:09 ` Seth Jennings
2012-06-28 0:20 ` Minchan Kim
2012-06-28 0:20 ` Minchan Kim
2012-06-25 16:14 ` [PATCH 3/3] x86: add local_tlb_flush_kernel_range() Seth Jennings
2012-06-25 16:14 ` Seth Jennings
2012-06-25 23:01 ` Konrad Rzeszutek Wilk
2012-06-25 23:01 ` Konrad Rzeszutek Wilk
2012-06-26 13:39 ` Seth Jennings [this message]
2012-06-26 13:39 ` Seth Jennings
2012-06-27 5:53 ` Minchan Kim
2012-06-27 5:53 ` Minchan Kim
2012-06-27 6:14 ` Alex Shi
2012-06-27 6:14 ` Alex Shi
2012-06-27 6:26 ` Minchan Kim
2012-06-27 6:26 ` Minchan Kim
2012-06-27 15:12 ` Dan Magenheimer
2012-06-27 15:12 ` Dan Magenheimer
2012-06-27 15:39 ` Konrad Rzeszutek Wilk
2012-06-27 15:39 ` Konrad Rzeszutek Wilk
2012-06-27 18:35 ` Seth Jennings
2012-06-27 18:35 ` Seth Jennings
2012-06-27 18:33 ` Seth Jennings
2012-06-27 18:33 ` Seth Jennings
2012-06-27 21:15 ` Dan Magenheimer
2012-06-27 21:15 ` Dan Magenheimer
2012-06-27 21:41 ` Seth Jennings
2012-06-27 21:41 ` Seth Jennings
2012-06-28 2:03 ` Alex Shi
2012-06-28 2:03 ` Alex Shi
2012-06-28 15:21 ` Seth Jennings
2012-06-28 15:21 ` Seth Jennings
2012-06-29 0:19 ` Alex Shi
2012-06-29 0:19 ` Alex Shi
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