ps performance acorn32 (was Re: Panic on acorn32 current)

[Mike Pumford <mpumford%mudcovered.org.uk@localhost>]

> Take back the performance comment. Something is monumentally wrong with 
> the 8.0-BETA ps. It takes ages to run:
>
> For comparison:
> # file /bin/ps
> /bin/ps: ELF 32-bit LSB executable, ARM, version 1, dynamically linked 
> (uses shared libs), for NetBSD 6.99.40, compiled for: arm, not stripped
> # time ps>/dev/null
>          0.22 real         0.02 user         0.18 sys
>
> And in a chroot with the 8.0-BETA userland:
>
> # file /bin/ps
> /bin/ps: ELF 32-bit LSB shared object, ARM, version 1 (ARM), dynamically 
> linked, interpreter /libexec/ld.elf_so, for NetBSD 8.0, compiled for: 
> arm, not stripped
> # time ps >/dev/null
>          8.19 real         1.25 user         6.62 sys
> #
>
> I'd guess the bug is in the libraries as running the 8.0 ps with the 
> 6.99.40 libraries performs at the same speed as the native 6.99.40 binary.
Not a bug. ktrace showed what was going on. Massive repeated lstats of 
/dev. I'd not run /etc/rc.d/sysdb start in the chroot. Once that was 
done ps worked entirely sensibly with no odd performance issues. :).

Apologies for the false alarm.

Mike