* makedumpfile 1.5.4 + kernel 3.11-rc2+ 4TB tests
@ 2013-07-26 11:42 ` Jingbai Ma
0 siblings, 0 replies; 4+ messages in thread
From: Jingbai Ma @ 2013-07-26 11:42 UTC (permalink / raw)
To: kexec, linux-kernel
Cc: kumagai-atsushi, HATAYAMA Daisuke, Vivek Goyal,
Eric W. Biederman, cpw, Mitchell, Lisa (MCLinux in Fort Collins),
Croxon, Nigel, Jingbai Ma, Wang, Jin (Steven)
Hi,
I have run some tests with makedumpfile 1.5.4 and upstream kernel
3.11-rc2+ on a machine with 4TB memory, here is testing results:
Test environment:
Machine: HP ProLiant DL980 G7 with 4TB RAM.
CPU: Intel(R) Xeon(R) CPU E7- 2860 @ 2.27GHz (8 sockets, 10 cores)
(Only 1 CPU was enabled the 2nd kernel)
Kernel: 3.11.0-rc2+ (at patch b3a3a9c441e2c8f6b6760de9331023a7906a4ac6)
crashkernel=384MB
vmcore size: 4.0TB
Dump file size: 15GB
All measured time from debug message of makedumpfile.
As a comparison, I also have tested makedumpfile 1.5.3.
(all time in seconds)
Excluding pages Copy data Total
makedumpfile 1.5.3 468 1182 1650
makedumpfile 1.5.4 93 518 611
So it seems there is a great performance improvement by the mmap mechanism.
--
Thanks,
Jingbai Ma
^ permalink raw reply [flat|nested] 4+ messages in thread
* makedumpfile 1.5.4 + kernel 3.11-rc2+ 4TB tests
@ 2013-07-26 11:42 ` Jingbai Ma
0 siblings, 0 replies; 4+ messages in thread
From: Jingbai Ma @ 2013-07-26 11:42 UTC (permalink / raw)
To: kexec, linux-kernel
Cc: Wang, Jin (Steven),
Jingbai Ma, Mitchell, Lisa (MCLinux in Fort Collins),
HATAYAMA Daisuke, kumagai-atsushi, Eric W. Biederman, Croxon,
Nigel, cpw, Vivek Goyal
Hi,
I have run some tests with makedumpfile 1.5.4 and upstream kernel
3.11-rc2+ on a machine with 4TB memory, here is testing results:
Test environment:
Machine: HP ProLiant DL980 G7 with 4TB RAM.
CPU: Intel(R) Xeon(R) CPU E7- 2860 @ 2.27GHz (8 sockets, 10 cores)
(Only 1 CPU was enabled the 2nd kernel)
Kernel: 3.11.0-rc2+ (at patch b3a3a9c441e2c8f6b6760de9331023a7906a4ac6)
crashkernel=384MB
vmcore size: 4.0TB
Dump file size: 15GB
All measured time from debug message of makedumpfile.
As a comparison, I also have tested makedumpfile 1.5.3.
(all time in seconds)
Excluding pages Copy data Total
makedumpfile 1.5.3 468 1182 1650
makedumpfile 1.5.4 93 518 611
So it seems there is a great performance improvement by the mmap mechanism.
--
Thanks,
Jingbai Ma
_______________________________________________
kexec mailing list
kexec@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/kexec
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: makedumpfile 1.5.4 + kernel 3.11-rc2+ 4TB tests
2013-07-26 11:42 ` Jingbai Ma
@ 2013-07-26 13:23 ` Vivek Goyal
-1 siblings, 0 replies; 4+ messages in thread
From: Vivek Goyal @ 2013-07-26 13:23 UTC (permalink / raw)
To: Jingbai Ma
Cc: kexec, linux-kernel, kumagai-atsushi, HATAYAMA Daisuke,
Eric W. Biederman, cpw, Mitchell, Lisa (MCLinux in Fort Collins),
Croxon, Nigel, Wang, Jin (Steven),
Andrew Morton
On Fri, Jul 26, 2013 at 07:42:39PM +0800, Jingbai Ma wrote:
> Hi,
>
> I have run some tests with makedumpfile 1.5.4 and upstream kernel
> 3.11-rc2+ on a machine with 4TB memory, here is testing results:
>
> Test environment:
> Machine: HP ProLiant DL980 G7 with 4TB RAM.
> CPU: Intel(R) Xeon(R) CPU E7- 2860 @ 2.27GHz (8 sockets, 10 cores)
> (Only 1 CPU was enabled the 2nd kernel)
> Kernel: 3.11.0-rc2+ (at patch b3a3a9c441e2c8f6b6760de9331023a7906a4ac6)
> crashkernel=384MB
> vmcore size: 4.0TB
> Dump file size: 15GB
> All measured time from debug message of makedumpfile.
> As a comparison, I also have tested makedumpfile 1.5.3.
>
> (all time in seconds)
> Excluding pages Copy data Total
> makedumpfile 1.5.3 468 1182 1650
> makedumpfile 1.5.4 93 518 611
>
>
> So it seems there is a great performance improvement by the mmap mechanism.
[CC Andrew].
Thanks Jingbai for testing results. Good to see that vmcore mmap() patches
are helping.
Thanks
Vivek
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: makedumpfile 1.5.4 + kernel 3.11-rc2+ 4TB tests
@ 2013-07-26 13:23 ` Vivek Goyal
0 siblings, 0 replies; 4+ messages in thread
From: Vivek Goyal @ 2013-07-26 13:23 UTC (permalink / raw)
To: Jingbai Ma
Cc: Andrew Morton, Wang, Jin (Steven),
kexec, linux-kernel, Mitchell, Lisa (MCLinux in Fort Collins),
HATAYAMA Daisuke, kumagai-atsushi, Eric W. Biederman, Croxon,
Nigel, cpw
On Fri, Jul 26, 2013 at 07:42:39PM +0800, Jingbai Ma wrote:
> Hi,
>
> I have run some tests with makedumpfile 1.5.4 and upstream kernel
> 3.11-rc2+ on a machine with 4TB memory, here is testing results:
>
> Test environment:
> Machine: HP ProLiant DL980 G7 with 4TB RAM.
> CPU: Intel(R) Xeon(R) CPU E7- 2860 @ 2.27GHz (8 sockets, 10 cores)
> (Only 1 CPU was enabled the 2nd kernel)
> Kernel: 3.11.0-rc2+ (at patch b3a3a9c441e2c8f6b6760de9331023a7906a4ac6)
> crashkernel=384MB
> vmcore size: 4.0TB
> Dump file size: 15GB
> All measured time from debug message of makedumpfile.
> As a comparison, I also have tested makedumpfile 1.5.3.
>
> (all time in seconds)
> Excluding pages Copy data Total
> makedumpfile 1.5.3 468 1182 1650
> makedumpfile 1.5.4 93 518 611
>
>
> So it seems there is a great performance improvement by the mmap mechanism.
[CC Andrew].
Thanks Jingbai for testing results. Good to see that vmcore mmap() patches
are helping.
Thanks
Vivek
_______________________________________________
kexec mailing list
kexec@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/kexec
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2013-07-26 13:24 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
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2013-07-26 11:42 makedumpfile 1.5.4 + kernel 3.11-rc2+ 4TB tests Jingbai Ma
2013-07-26 11:42 ` Jingbai Ma
2013-07-26 13:23 ` Vivek Goyal
2013-07-26 13:23 ` Vivek Goyal
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