user:sys time ratio
phk at phk.freebsd.dk
Sun Nov 30 06:31:02 PST 2003
In message <188.8.131.52.1.20031130140203.031e8d08 at popserver.sfu.ca>, Colin Percival
> I've got a system running 5.2-BETA from 27/11/03, with the malloc_abort,
>malloc_junk, DEBUG=-g, DDB, INVARIANT*, and WITNESS* debugging options
>changed (as was done in 5.1-RELEASE).
> When running `make buildworld`, I see large amounts of sys time; eg, 27
>minutes user & 14 minutes sys for building 5.2, or 14 minutes user & 10
>minutes sys for building 4.9. I expected the ratio of user:sys to be much
>larger than this, and mailing list traffic indicates that a 4:1 ratio is
>typical. (FWIW, prior to changing the debugging options, the user:sys time
>ratio was around 1:1.)
I've seen UNIX systems have "typical" system/user splits from 1/9 to 9/1
it all depends on what you're doing.
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG | TCP/IP since RFC 956
FreeBSD committer | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.
More information about the freebsd-current