* Linux Performance
@ 2004-01-22 20:48 Dave, Dave, Dave, Dave Johnson, Johnson, Johnson, Johnson
2004-01-23 0:04 ` Wolfgang Denk
0 siblings, 1 reply; 4+ messages in thread
From: Dave, Dave, Dave, Dave Johnson, Johnson, Johnson, Johnson @ 2004-01-22 20:48 UTC (permalink / raw)
To: linuxppc-embedded
I am running MV3.1 Linux on a MPC8270 based custom
board. I ran LMbench2 on my board and got these
numbers (file attached). Also I have high interrupt
latency numbers from proc/latencytimes. However I dont
have any numbers to compare these with. Is there any
database where I can find such data.
Also these numbers dont look good either. Are there
any tricks which can be played to enhance kernel
performance??
Thanks
Dave..
** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: Linux Performance
2004-01-22 20:48 Linux Performance Dave, Dave, Dave, Dave Johnson, Johnson, Johnson, Johnson
@ 2004-01-23 0:04 ` Wolfgang Denk
2004-01-26 13:22 ` Dave, Dave, Dave, Dave Johnson, Johnson, Johnson, Johnson
2004-01-26 13:48 ` Dave Johnson
0 siblings, 2 replies; 4+ messages in thread
From: Wolfgang Denk @ 2004-01-23 0:04 UTC (permalink / raw)
To: Dave, Dave, Dave, Dave Johnson, Johnson, Johnson, Johnson
Cc: linuxppc-embedded
In message <20040122204828.62134.qmail@web21405.mail.yahoo.com> you wrote:
>
> I am running MV3.1 Linux on a MPC8270 based custom
> board. I ran LMbench2 on my board and got these
> numbers (file attached). Also I have high interrupt
Attachment missing.
> Also these numbers dont look good either. Are there
> any tricks which can be played to enhance kernel
> performance??
Turn on the caches?
Wolfgang Denk
--
See us @ Embedded World, Nuremberg, Feb 17 - 19, Hall 12.0 Booth 440
Phone: (+49)-8142-4596-87 Fax: (+49)-8142-4596-88 Email: wd@denx.de
"You know, after a woman's raised a family and so on, she wants to
start living her own life." "Whose life she's _been_ living, then?"
- Terry Pratchett, _Witches Abroad_
** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
^ permalink raw reply [flat|nested] 4+ messages in thread* Re: Linux Performance
2004-01-23 0:04 ` Wolfgang Denk
@ 2004-01-26 13:22 ` Dave, Dave, Dave, Dave Johnson, Johnson, Johnson, Johnson
2004-01-26 13:48 ` Dave Johnson
1 sibling, 0 replies; 4+ messages in thread
From: Dave, Dave, Dave, Dave Johnson, Johnson, Johnson, Johnson @ 2004-01-26 13:22 UTC (permalink / raw)
To: Wolfgang Denk; +Cc: linuxppc-embedded
[-- Attachment #1: Type: text/plain, Size: 903 bytes --]
Sorry, file is attached now.
Dave
--- Wolfgang Denk <wd@denx.de> wrote:
>
> In message
> <20040122204828.62134.qmail@web21405.mail.yahoo.com>
> you wrote:
> >
> > I am running MV3.1 Linux on a MPC8270 based custom
> > board. I ran LMbench2 on my board and got these
> > numbers (file attached). Also I have high
> interrupt
>
> Attachment missing.
>
> > Also these numbers dont look good either. Are
> there
> > any tricks which can be played to enhance kernel
> > performance??
>
> Turn on the caches?
>
>
> Wolfgang Denk
>
> --
> See us @ Embedded World, Nuremberg, Feb 17 - 19,
> Hall 12.0 Booth 440
> Phone: (+49)-8142-4596-87 Fax: (+49)-8142-4596-88
> Email: wd@denx.de
> "You know, after a woman's raised a family and so
> on, she wants to
> start living her own life." "Whose life she's
> _been_ living, then?"
> - Terry Pratchett,
> _Witches Abroad_
>
>
[-- Attachment #2: ppc_LMbench.txt --]
[-- Type: text/plain, Size: 4972 bytes --]
L M B E N C H 2 . 0 S U M M A R Y
------------------------------------
Basic system parameters
----------------------------------------------------
Host OS Description Mhz
--------- ------------- ----------------------- ----
dave--x86 Linux 2.4.18- i686-pc-linux-gnu 2387
dave-ppc Linux 2.4.18_ powerpc-linux-gnu 450
Processor, Processes - times in microseconds - smaller is better
----------------------------------------------------------------
Host OS Mhz null null open selct sig sig fork exec sh
call I/O stat clos TCP inst hndl proc proc proc
--------- ------------- ---- ---- ---- ---- ---- ----- ---- ---- ---- ---- ----
dave--x86 Linux 2.4.18- 2387 0.46 0.51 1.21 1.87 6.001 0.74 2.51 125. 348. 2349
dave-ppc Linux 2.4.18_ 450 0.49 1.19 7.32 24.1 68.9 1.98 6.21 1388 9126 36.K
Context switching - times in microseconds - smaller is better
-------------------------------------------------------------
Host OS 2p/0K 2p/16K 2p/64K 8p/16K 8p/64K 16p/16K 16p/64K
ctxsw ctxsw ctxsw ctxsw ctxsw ctxsw ctxsw
--------- ------------- ----- ------ ------ ------ ------ ------- -------
dave--x86 Linux 2.4.18- 0.800 1.8600 5.4000 2.3500 32.4 5.74000 41.2
dave-ppc Linux 2.4.18_ 1.730 82.9 277.1 85.0 282.3 85.0 282.4
*Local* Communication latencies in microseconds - smaller is better
-------------------------------------------------------------------
Host OS 2p/0K Pipe AF UDP RPC/ TCP RPC/ TCP
ctxsw UNIX UDP TCP conn
--------- ------------- ----- ----- ---- ----- ----- ----- ----- ----
dave--x86 Linux 2.4.18- 0.800 4.085 7.55 11.1 17.2 13.7 23.3 32.5
dave-ppc Linux 2.4.18_ 1.730 14.1 42.6 128.1 285.9 210.7 375.0 603.
File & VM system latencies in microseconds - smaller is better
--------------------------------------------------------------
Host OS 0K File 10K File Mmap Prot Page
Create Delete Create Delete Latency Fault Fault
--------- ------------- ------ ------ ------ ------ ------- ----- -----
dave--x86 Linux 2.4.18- 29.6 6.0130 67.6 11.5 1125.0 1.083 1.00000
dave-ppc Linux 2.4.18_ 1968.5 1483.7 19.6K 1841.6 8065.0 1.920 38.0
*Local* Communication bandwidths in MB/s - bigger is better
-----------------------------------------------------------
Host OS Pipe AF TCP File Mmap Bcopy Bcopy Mem Mem
UNIX reread reread (libc) (hand) read write
--------- ------------- ---- ---- ---- ------ ------ ------ ------ ---- -----
dave--x86 Linux 2.4.18- 1237 2080 580. 1508.6 1546.5 800.0 795.8 1582 1194.
dave-ppc Linux 2.4.18_ 91.7 54.2 42.7 80.9 210.3 108.0 108.0 210. 166.6
Memory latencies in nanoseconds - smaller is better
(WARNING - may not be correct, check graphs)
---------------------------------------------------
Host OS Mhz L1 $ L2 $ Main mem Guesses
--------- ------------- ---- ----- ------ -------- -------
dave--x86 Linux 2.4.18- 2387 0.838 7.6960 143.3
dave-ppc Linux 2.4.18_ 450 4.447 121.1 125.5 No L2 cache?
Interrupt Latency Numbers (done from console, if done from telnet, I dont get the ones in 2k+)
root@dave-ppc:~# cat /proc/latencytimes
cpu 0 worst 20 latency times of 261 measured in this period.
usec cause mask start line/file address end line/file
2862 uart 0 832/sched.c c000ff24 71/tty_io.c
2861 uart 1 832/sched.c c000ff24 664/sched.c
2838 spin_lock 0 60/tty_io.c c00a9b90 664/sched.c
87 spin_lock 0 392/memory.c c0028c34 413/memory.c
86 spin_lock 0 60/dir.c c007d7c4 664/sched.c
85 spin_lock 0 60/namei.c c00539d0 664/sched.c
56 spin_lock 0 163/memory.c c0028830 169/memory.c
55 spin_lock 0 205/fork.c c0013d90 210/fork.c
51 spin_lock 0 1477/memory.c c002aad4 210/fork.c
42 spin_lock 0 60/exit.c c0019b9c 664/sched.c
40 unknown 4 78/softirq.c c001bc20 123/softirq.c
28 unknown 0 832/sched.c c000ff24 71/dir.c
24 unknown 0 832/sched.c c000ff24 71/namei.c
20 spin_lock 0 1017/memory.c c0029b80 1027/memory.c
19 spin_lock 0 1245/memory.c c002a57c 1262/memory.c
19 spin_lock 1 582/irq.c c00058cc 123/softirq.c
18 spin_lock 0 1313/memory.c c002a7d8 1342/memory.c
17 spin_lock 0 86/mprotect.c c0032ebc 92/mprotect.c
16 spin_lock 0 60/namei.c c00539d0 71/namei.c
^ permalink raw reply [flat|nested] 4+ messages in thread* Re: Linux Performance
2004-01-23 0:04 ` Wolfgang Denk
2004-01-26 13:22 ` Dave, Dave, Dave, Dave Johnson, Johnson, Johnson, Johnson
@ 2004-01-26 13:48 ` Dave Johnson
1 sibling, 0 replies; 4+ messages in thread
From: Dave Johnson @ 2004-01-26 13:48 UTC (permalink / raw)
To: Wolfgang Denk; +Cc: linuxppc-embedded
Caches are already enabled.
Dave..
--- Wolfgang Denk <wd@denx.de> wrote:
> In message
> <20040122204828.62134.qmail@web21405.mail.yahoo.com>
> you wrote:
> >
> > I am running MV3.1 Linux on a MPC8270 based custom
> > board. I ran LMbench2 on my board and got these
> > numbers (file attached). Also I have high
> interrupt
>
> Attachment missing.
>
> > Also these numbers dont look good either. Are
> there
> > any tricks which can be played to enhance kernel
> > performance??
>
> Turn on the caches?
>
>
> Wolfgang Denk
>
> --
> See us @ Embedded World, Nuremberg, Feb 17 - 19,
> Hall 12.0 Booth 440
> Phone: (+49)-8142-4596-87 Fax: (+49)-8142-4596-88
> Email: wd@denx.de
> "You know, after a woman's raised a family and so
> on, she wants to
> start living her own life." "Whose life she's
> _been_ living, then?"
> - Terry Pratchett,
> _Witches Abroad_
** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
^ permalink raw reply [flat|nested] 4+ messages in thread
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2004-01-22 20:48 Linux Performance Dave, Dave, Dave, Dave Johnson, Johnson, Johnson, Johnson
2004-01-23 0:04 ` Wolfgang Denk
2004-01-26 13:22 ` Dave, Dave, Dave, Dave Johnson, Johnson, Johnson, Johnson
2004-01-26 13:48 ` Dave Johnson
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