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SubjectRe: lmbench results for 2.4 and 2.5 -- updated results

Okay, I'm somewhat chagrined but a bit relieved at the same time. Linus'
comment about being sure that I'm testing the same setup promped me to go
through and doublecheck my config. Turns out that I had some debug stuff turned
on. Duh.

Here are the results of 2.4.20 and 2.5.65 with as close to matching configs as I
could make them.

The ones that stand out are:
--fork/exec (due to rmap I assume?)
--mmap (also due to rmap?)
--select latency (any ideas?)
--udp latency (related to select latency?)
--page fault (is this significant?)
--tcp bandwidth (explained as debugging code)

Sorry about the bogus numbers last time around.

Chris


L M B E N C H 2 . 0 S U M M A R Y
------------------------------------
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
---- ------------- ---- ---- ---- ---- ---- ----- ---- ---- ---- ---- ----
doug Linux 2.5.65 750 0.38 0.73 5.46 7.13 64.2 1.03 3.25 231. 1729 17.K
doug Linux 2.4.20 750 0.37 0.50 3.84 5.48 17.5 0.96 3.36 185. 1373 15.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
---- ------------- ----- ------ ------ ------ ------ ------- -------
doug Linux 2.5.65 1.420 2.9700 108.7 46.6 157.6 46.7 157.5
doug Linux 2.4.20 1.120 2.3400 91.5 43.5 155.5 45.2 156.0
*Local* Communication latencies in microseconds - smaller is better
-------------------------------------------------------------------
Host OS 2p/0K Pipe AF UDP RPC/ TCP RPC/ TCP
ctxsw UNIX UDP TCP conn
---- ------------- ----- ----- ---- ----- ----- ----- ----- ----
doug Linux 2.5.65 1.420 7.642 11.4 21.9 45.0 27.2 60.5 104.
doug Linux 2.4.20 1.120 6.606 10.3 15.8 40.9 26.2 56.5 82.9
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
---- ------------- ------ ------ ------ ------ ------- ----- -----
doug Linux 2.5.65 64.8 21.0 165.6 42.0 2550.0 0.946 4.00000
doug Linux 2.4.20 66.1 20.5 192.8 51.6 1612.0 0.764 2.00000
*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
---- ------------- ---- ---- ---- ------ ------ ------ ------ ---- -----
doug Linux 2.5.65 196. 107. 51.1 222.5 363.4 217.9 217.6 489. 326.0
doug Linux 2.4.20 233. 111. 90.0 253.6 370.0 223.8 226.1 498. 328.9


--
Chris Friesen | MailStop: 043/33/F10
Nortel Networks | work: (613) 765-0557
3500 Carling Avenue | fax: (613) 765-2986
Nepean, ON K2H 8E9 Canada | email: cfriesen@nortelnetworks.com

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