mpd + high cpu usage

[Iasen Kostov]

Hi,
    I'm running some pptp servers using poptop+ppp and now I'm trying 
how the situation will look like with mpd. I'm comparing two pptp ACs - 
one using poptop+ppp and one using mpd. Both have 250 connected users 
who are generating about 1MByte/sec.

poptop+ppp :

CPU states: 13.6% user,  0.0% nice, 12.1% system, 20.6% interrupt, 53.7% 
idle

and many ppp + pptpctrl

mpd:

CPU states: 11.7% user,  0.0% nice, 33.1% system, 36.2% interrupt, 19.1% 
idle

90677 root     111    0 11100K 10028K RUN    175:27 39.75% 39.75% mpd
or
90677 root     111    0 11100K 10028K select 175:17 37.84% 37.84% mpd

Interesting thing is that sometimes cpu usage of mpd falls to 3-4% and 
the processor goes to 80% idle but only for a few seconds.

    Regards