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Original-Date: Wed, 09 May 2001 11:29:22 -0500
From: "Andrew M. Theurer" <atheu...@austin.ibm.com>
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Subject: Linux 2.4 Scalability, Samba, and Netbench
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Hello,
I am evaluating Linux 2.4 SMP scalability, using Netbench(r) as a
workload with Samba, and I wanted to get some feedback on results so
far. I would appreciate comments and any suggestions for improving
scalability on this workload.
The environment consists of an Intel Profusion based SMP with 8 x 700
Mhz Xeon, 1 Mb L2, 14+ GB ram, ServeRAID, 8 Intel ethernet cards (IBM
Netfinity 8500R). There are 16 500 Mhz PII, 128 MB clients running
Windows NT. I tested for uniprocessor, 2-way, and 4-way SMP
configurations. Future plans including testing 8-way performance when
more test clients are available. Netbench(r) 7.01 was used with the
enterprise disk suite test. The test was modified to use 2 engines per
client, and the range of test clients was changed from 1-60 to 8-16
(for 2P & 4P) and 4-12 (for uniprocessor).
My initial results for linux 2.4.0, ext2 are as follows:
[UP] [2P] [4P]
08 149
12 199
16 227 236 260
# Eng 20 193 272 317 Mbps
24 223 283 369
28 285 396
32 285 405
Same test, but with IRQ to processor affinity for 2P & 4P on the 8
ethernet cards:
[2P] [4P]
16 231 259
# Eng 20 278 297
24 293 320 Mbps
28 297 365
32 299 399*
*Still investigating; we had some cpu idle time
on the 4P/32 engines, but not on test configuration
with out IRQ aff.
And for linux 2.4.3 with reiserfs:
[UP] [2P] [4P]
08 130
12 190
16 203 210 231
# Eng 20 190 235 279
24 200 249 319 Mbps
28 239 360
32 251 335
Same, but with IRQ affinity for 2P & 4P on the 8 ethernet cards:
[2P] [4P]
16 224 236
# Eng 20 220 308
24 252 331 Mbps
28 269 375
32 267 382
--All results in Mbps, using Netbench(r) 7.0.1 and Samba 2.0.7
--Netbench(r) is available at http://www.netbench.com
I would like to help improve SMP scalability on this workload. If you
have questions or comments about the above results, or if you are
conducting similar tests, please send email to
lse-t...@lists.sourceforge.net. I have some ideas on my next steps,
but would like to discuss first.
Regards,
Andrew Theurer
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Original-Date: Wed, 9 May 2001 09:56:58 -0700
From: Mike Kravetz <mkrav...@sequent.com>
To: "Andrew M. Theurer" <atheu...@austin.ibm.com>
Cc: lse-t...@lists.sourceforge.net,
"linux-ker...@vger.kernel.org" <linux-ker...@vger.kernel.org>,
samba-technical <samba-techni...@samba.org>
Subject: Re: Linux 2.4 Scalability, Samba, and Netbench
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On Wed, May 09, 2001 at 11:29:22AM -0500, Andrew M. Theurer wrote:
>
> I am evaluating Linux 2.4 SMP scalability, using Netbench(r) as a
> workload with Samba, and I wanted to get some feedback on results so
> far.
Do you have any kernel profile or lock contention data?
--
Mike Kravetz mkrav...@sequent.com
IBM Linux Technology Center
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Original-Date: Wed, 09 May 2001 12:30:35 -0500
From: "Andrew M. Theurer" <atheu...@austin.ibm.com>
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samba-technical <samba-techni...@samba.org>
Subject: Re: Linux 2.4 Scalability, Samba, and Netbench
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I do have kernprof ACG and lockmeter for a 4P run. We saw no
significant problems with lockmeter. csum_partial_copy_generic was the
highest % in profile, at 4.34%. I'll see if we can get some space on
http://lse.sourceforge.net to post the test data.
Andrew Theurer
Mike Kravetz wrote:
>
> On Wed, May 09, 2001 at 11:29:22AM -0500, Andrew M. Theurer wrote:
> >
> > I am evaluating Linux 2.4 SMP scalability, using Netbench(r) as a
> > workload with Samba, and I wanted to get some feedback on results so
> > far.
>
> Do you have any kernel profile or lock contention data?
>
> --
> Mike Kravetz mkrav...@sequent.com
> IBM Linux Technology Center
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Subject: Re: Linux 2.4 Scalability, Samba, and Netbench
To: atheu...@austin.ibm.com (Andrew M. Theurer)
Original-Date: Wed, 9 May 2001 18:39:01 +0100 (BST)
Cc: mkrav...@sequent.com (Mike Kravetz), lse-t...@lists.sourceforge.net,
linux-ker...@vger.kernel.org (linux-ker...@vger.kernel.org),
samba-techni...@samba.org (samba-technical)
In-Reply-To: <3AF97EBB.9F0ABE9A@austin.ibm.com> from "Andrew M. Theurer" at May 09, 2001 12:30:35 PM
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From: Alan Cox <a...@lxorguk.ukuu.org.uk>
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> significant problems with lockmeter. csum_partial_copy_generic was the
> highest % in profile, at 4.34%. I'll see if we can get some space on
Are you using Antons optimisations to samba to use sendfile ?
Alan
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Original-Date: Wed, 09 May 2001 12:43:54 -0500
From: "Andrew M. Theurer" <atheu...@austin.ibm.com>
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"linux-ker...@vger.kernel.org" <linux-ker...@vger.kernel.org>,
samba-technical <samba-techni...@samba.org>
Subject: Re: Linux 2.4 Scalability, Samba, and Netbench
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Alan Cox wrote:
>
> > significant problems with lockmeter. csum_partial_copy_generic was the
> > highest % in profile, at 4.34%. I'll see if we can get some space on
>
> Are you using Antons optimisations to samba to use sendfile ?
>
> Alan
Not yet. As I understand it, we need a supported nic to take advantage
of the sendfile/zero copy patch. Once we have the HW, we will use it.
Thanks,
Andrew Theurer
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Subject: Re: Linux 2.4 Scalability, Samba, and Netbench
To: lse-t...@lists.sourceforge.net
Cc: linux-ker...@vger.kernel.org, samba-techni...@samba.org
X-Mailer: Lotus Notes Release 5.0.3 (Intl) 21 March 2000
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From: "Bruce Allan" <bruce.al...@us.ibm.com>
Original-Date: Wed, 9 May 2001 16:34:48 -0700
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Andrew Theurer wrote:
> I do have kernprof ACG and lockmeter for a 4P run. We saw no
> significant problems with lockmeter. csum_partial_copy_generic was the
> highest % in profile, at 4.34%. I'll see if we can get some space on
> http://lse.sourceforge.net to post the test data.
The Netfinity system that you are using has two different supported GigE
adapters. I assume you are using one of these types - Netfinity Gigabit
Ethernet Adapter (19K4401) and the Netfinity Gigabit Ethernet SX Server
Adapter (06P3701); using the acenic.c and e1000.c drivers, respectively.
From what I understand after initial perusal of the two drivers, the former
has receive checksumming support on the adapter itself while the latter,
the one you are using, does not support hardware checksumming (at least, it
is not enabled by the driver).
Are you able to re-run your tests with GigE adapters that support
checksumming on the hardware instead of doing it in the kernel? If not, I
will be running similar tests in a very similar configuration (with the
19K4401 adapters) in the near future and can share results if you'd like.
Bruce Allan/Beaverton/IBM
IBM Linux Technology Center - OS Gold
503-578-4187 T/L 775-4187
bruce.al...@us.ibm.com
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Original-Date: Thu, 10 May 2001 14:10:50 +0530
From: Dipankar Sarma <dipan...@sequent.com>
To: "Andrew M. Theurer" <atheu...@austin.ibm.com>
Cc: Mike Kravetz <mkrav...@sequent.com>, lse-t...@lists.sourceforge.net,
"linux-ker...@vger.kernel.org" <linux-ker...@vger.kernel.org>,
samba-technical <samba-techni...@samba.org>
Subject: Re: [Lse-tech] Re: Linux 2.4 Scalability, Samba, and Netbench
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Hello Andrew,
You would need contact one of the administrators of the LSE project for this.
You would need a developer id for uploading. You can get all the information
from http://sourceforge.net/projects/lse/.
I think it will be very helpful to have the results including lockmeter
and kernprof data available in lse.sourceforge.net.
Thanks
Dipankar
--
Dipankar Sarma <dipan...@sequent.com> Project: http://lse.sourceforge.net
Linux Technology Center, IBM Software Lab, Bangalore, India.
On Wed, May 09, 2001 at 12:30:35PM -0500, Andrew M. Theurer wrote:
> I do have kernprof ACG and lockmeter for a 4P run. We saw no
> significant problems with lockmeter. csum_partial_copy_generic was the
> highest % in profile, at 4.34%. I'll see if we can get some space on
> http://lse.sourceforge.net to post the test data.
>
> Andrew Theurer
>
> Mike Kravetz wrote:
> >
> > On Wed, May 09, 2001 at 11:29:22AM -0500, Andrew M. Theurer wrote:
> > >
> > > I am evaluating Linux 2.4 SMP scalability, using Netbench(r) as a
> > > workload with Samba, and I wanted to get some feedback on results so
> > > far.
> >
> > Do you have any kernel profile or lock contention data?
> >
> > --
> > Mike Kravetz mkrav...@sequent.com
> > IBM Linux Technology Center
>
> _______________________________________________
> Lse-tech mailing list
> Lse-t...@lists.sourceforge.net
> http://lists.sourceforge.net/lists/listinfo/lse-tech
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Original-Date: Thu, 10 May 2001 08:38:13 -0500
From: "Andrew M. Theurer" <atheu...@austin.ibm.com>
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Subject: Re: Linux 2.4 Scalability, Samba, and Netbench
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Bruce Allan wrote:
>
> Andrew Theurer wrote:
> > I do have kernprof ACG and lockmeter for a 4P run. We saw no
> > significant problems with lockmeter. csum_partial_copy_generic was the
> > highest % in profile, at 4.34%. I'll see if we can get some space on
> > http://lse.sourceforge.net to post the test data.
>
> The Netfinity system that you are using has two different supported GigE
> adapters. I assume you are using one of these types - Netfinity Gigabit
> Ethernet Adapter (19K4401) and the Netfinity Gigabit Ethernet SX Server
> Adapter (06P3701); using the acenic.c and e1000.c drivers, respectively.
> >From what I understand after initial perusal of the two drivers, the former
> has receive checksumming support on the adapter itself while the latter,
> the one you are using, does not support hardware checksumming (at least, it
> is not enabled by the driver).
Bruce,
According to Intel's driver for Pro/1000, it supports checksum on Rx via
module option "XsunRX=1". I have not tried this yet because we are
waiting on our Gbps switch hardware.
> Are you able to re-run your tests with GigE adapters that support
> checksumming on the hardware instead of doing it in the kernel? If not, I
> will be running similar tests in a very similar configuration (with the
> 19K4401 adapters) in the near future and can share results if you'd like.
Yes, hopefully we will be running the new setup (64 clients, many Gbps
adapters) in about 2-3 weeks. At that point I'd like to get some
results for 8-way as well. It would definitely be a good idea to
compare results.
Andrew Theurer
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Original-Date: Thu, 10 May 2001 10:21:05 +0530
From: Maneesh Soni <smane...@sequent.com>
To: "Andrew M. Theurer" <atheu...@austin.ibm.com>
Cc: lse-t...@lists.sourceforge.net,
"linux-ker...@vger.kernel.org" <linux-ker...@vger.kernel.org>,
samba-technical <samba-techni...@samba.org>
Subject: Re: [Lse-tech] Re: Linux 2.4 Scalability, Samba, and Netbench
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On Wed, May 09, 2001 at 12:30:35PM -0500, Andrew M. Theurer wrote:
> I do have kernprof ACG and lockmeter for a 4P run. We saw no
> significant problems with lockmeter. csum_partial_copy_generic was the
> highest % in profile, at 4.34%. I'll see if we can get some space on
> http://lse.sourceforge.net to post the test data.
>
> Andrew Theurer
>
> Mike Kravetz wrote:
> >
> > On Wed, May 09, 2001 at 11:29:22AM -0500, Andrew M. Theurer wrote:
> > >
> > > I am evaluating Linux 2.4 SMP scalability, using Netbench(r) as a
> > > workload with Samba, and I wanted to get some feedback on results so
> > > far.
> >
> > Do you have any kernel profile or lock contention data?
> >
> > --
> > Mike Kravetz mkrav...@sequent.com
> > IBM Linux Technology Center
Hello Andrew,
If in the kernprof data you find "fget" as one of the high rankers (say in top
10) then can you try the scalable FD management patch which uses
read-copy-update mechanism for protecting files_struct.
As of now there are working patches available for read-copy-update mechanism
and FD management at "http://lse.sourceforge.net/locking/rclock.html" as
rclock-2.4.2-01.patch and files_struct_rcu-2.4.2-03.patch but we are working on
simpler interfaces. Also let me know if you need the patches for a different
2.4 kernel version.
Maneesh
--
Maneesh Soni
IBM Linux Technology Center,
IBM India Software Lab, Bangalore.
email: smane...@sequent.com
http://lse.sourceforge.net/locking/rclock.html
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