Re: pflogd consume CPU

[christos%astron.com@localhost (Christos Zoulas)]

In article <CAM_ND6oVp2_qqVXh70ZVhH3AkA59kdJC50pAORz8mJEsJzFMBQ%mail.gmail.com@localhost>,
Miwa Susumu  <miwarin%gmail.com@localhost> wrote:
>2016-02-07 1:15 GMT+09:00 Christos Zoulas <christos%astron.com@localhost>:
>>>>>pflogd process consume CPU.
>>>>>Because of that in load average is too high.
>>>> Can you ktrace it?
>>>this is kdump output.
>>>sakura# kdump ktrace.out
>>>   974      1 pflogd   EMUL  "netbsd"
>>>   974      1 pflogd   CALL  read(3,0xbb912000,0x80000)
>>>   974      1 pflogd   RET   read -1 errno 35 Resource temporarily unavailable
>> And what does 'fstat -p 974' say about fd 3?
>
>fd 3 is bpf.
>
>% fstat -p 974
>USER     CMD          PID   FD MOUNT       INUM MODE         SZ|DV R/W
>_pflogd  pflogd       974 root /var      389524 drwxr-xr-x     512 r
>_pflogd  pflogd       974   wd /var      389524 drwxr-xr-x     512 r
>_pflogd  pflogd       974    0 /         380813 crw-rw-rw-    null rw
>_pflogd  pflogd       974    1 /         380813 crw-rw-rw-    null rw
>_pflogd  pflogd       974    2 /         380813 crw-rw-rw-    null rw
>_pflogd  pflogd       974    3* bpf rec=0, dr=0, cap=0, pid=1135,
>promisc, seesent, idle
>_pflogd  pflogd       974    4 /var     1855883 -rw-------      24 rw
>_pflogd  pflogd       974    5* unix stream  0xc4eda9b8 <-> 0xc4edaa08
>

Seems that there is a general problem with non-blocking fd's on 7.
Can you start pflogd with ktrace or gdb and see where it is setting
non-blocking I/O on the fd?

christos