pkg/41248: transmission-daemon busy-loops

[scotte%warped.com@localhost]

>Number:         41248
>Category:       pkg
>Synopsis:       transmission-daemon busy-loops
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    pkg-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sun Apr 19 17:20:00 +0000 2009
>Originator:     Scott Ellis
>Release:        amd64
>Organization:
>Environment:
NetBSD intrepid 5.99.10 NetBSD 5.99.10 (INTREPID.P5W) #0: Sun Apr  5 09:35:28 
PDT 2009  
scotte@intrepid:/nbu/source/netbsd/src/obj.amd64/nbu/source/netbsd/src/sys/arch/amd64/compile/INTREPID.P5W
 amd64

>Description:
Building Transmission 1.52 from pkgsrc works great, except that starting 
transmission-daemon causes it to use 100% CPU.  It seems to function, but 
obviously is sub-optimal.

PID USERNAME PRI NICE   SIZE   RES STATE      TIME   WCPU    CPU COMMAND
14786 scotte    14    0    80M 3836K RUN/1      0:07 92.48% 30.52% transmission

intrepid{...52/daemon}% ktrace ./transmission-daemon -f
[10:13:45.082] Couldn't create socket: Address family not supported by protocol 
family
[10:13:45.082] RPC Server: Adding address to whitelist: 127.0.0.1
[10:13:45.082] RPC Server: Serving RPC and Web requests on port 9091
[10:13:45.082] RPC Server: Whitelist enabled
[10:13:45.082] Transmission 1.52 (8229) started
[10:13:54.135] Port Forwarding: State changed from "Not forwarded" to "???"
[10:13:54.135] Port Forwarding: Opened port 51413 on 0.0.0.0 to listen for 
incoming peer connections

It seems to be caught in a bad kevent loop:
 14786      2 transmission-dae CALL  accept(7,0x7f7ffbfffb80,0x7f7ffbfffc0c)
 14786      2 transmission-dae RET   accept -1 errno 35 Resource temporarily una
vailable
 14786      2 transmission-dae CALL  __gettimeofday50(0x7f7ffbfffc80,0)
 14786      2 transmission-dae RET   __gettimeofday50 0
 14786      2 transmission-dae CALL  __kevent50(5,0x7f7ffc809000,0,0x7f7ffc80a00
0,0x40,0x7f7ffbfffcc0)
 14786      2 transmission-dae RET   __kevent50 0
 14786      2 transmission-dae CALL  __clock_gettime50(3,0x7f7ffbfffd20)
 14786      2 transmission-dae RET   __clock_gettime50 0
 14786      2 transmission-dae CALL  __gettimeofday50(0x7f7ffbfffc80,0)
 14786      2 transmission-dae RET   __gettimeofday50 0
 14786      2 transmission-dae CALL  accept(7,0x7f7ffbfffb80,0x7f7ffbfffc0c)
 14786      2 transmission-dae RET   accept -1 errno 35 Resource temporarily una
vailable
 14786      2 transmission-dae CALL  __kevent50(5,0x7f7ffc809000,0,0x7f7ffc80a00
0,0x40,0x7f7ffbfffcc0)
 14786      2 transmission-dae RET   __kevent50 0
 14786      2 transmission-dae CALL  __clock_gettime50(3,0x7f7ffbfffd20)
 14786      2 transmission-dae RET   __clock_gettime50 0
 14786      2 transmission-dae CALL  __gettimeofday50(0x7f7ffbfffc90,0)


>How-To-Repeat:
Build Transmission 1.52.
Execute "transmission-daemon".
Note CPU utilization.
>Fix: