bad lmbench numbers for mmap

V Ganesh (ganesh@vxindia.veritas.com)
Sat, 17 Apr 1999 01:34:18 +0530 (IST)

hi,
I tried lmbench 1.9 on an ultra5 (270 MHz, 128 MB RAM) running
linux 2.2.2 and compared with an identical machine running solaris 2.6(except
it had 64M). linux blew solaris away in most of the benchmarks except mmap
latency.

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
--------- ------------- ------ ------ ------ ------ ------- ----- -----
sparc64-l Linux 2.2.2 24 4 54 13 36488 4 1.9K

--------- ------------- ------ ------ ------ ------ ------- ----- -----
sparc-sun SunOS 5.6 480 598 4761 245 4912 21 15.6K

and this on a P-II 450 running 2.2.5
--------- ------------- ------ ------ ------ ------ ------- ----- -----
i686-linu Linux 2.2.5 15 1 27 2 11674 1 0.7K

so what's up with mmap ?

ganesh

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