kern/166071: High CPU Utilization on HylaFAX processes

Ruan Chunping ruanchunping at gmail.com
Tue Nov 5 12:40:03 UTC 2013


The following reply was made to PR kern/166071; it has been noted by GNATS.

From: Ruan Chunping <ruanchunping at gmail.com>
To: bug-followup at freebsd.org, rnoll.bsd at gmail.com
Cc:  
Subject: Re: kern/166071: High CPU Utilization on HylaFAX processes
Date: Tue, 5 Nov 2013 20:31:30 +0800

 --001a11332dfc8f536e04ea6d3793
 Content-Type: text/plain; charset=UTF-8
 
 more info here:
 
 $ sudo fstat -v -p 63466
 USER     CMD          PID   FD MOUNT      INUM MODE         SZ|DV R/W
 uucp     faxq       63466 text /usr     1630604 -r-sr-xr-x  274064  r
 uucp     faxq       63466   wd /var       1381 drwxr-xr-x      20  r
 uucp     faxq       63466 root /             4 drwxr-xr-x      26  r
 uucp     faxq       63466    0 /dev          7 crw-rw-rw-    null rw
 uucp     faxq       63466    1 /dev          7 crw-rw-rw-    null rw
 uucp     faxq       63466    2 /dev          7 crw-rw-rw-    null rw
 uucp     faxq       63466    3 /dev          7 crw-rw-rw-    null rw
 uucp     faxq       63466    4 /var      50545 prw-------       0  r
 uucp     faxq       63466    5* local dgram fffff80039013d20 <->
 fffff80004ef7a50
 
 FD 4, it's inode is 50545
 $ ls -i /var/spool/hylafax/FIFO
 50545 /var/spool/hylafax/FIFO
 $ file /var/spool/hylafax/FIFO
 /var/spool/hylafax/FIFO: fifo (named pipe)
 
 
 so ,is it a bug about /usr/src/sys/fs/fifofs/fifo_vnops.c ?
 
 
 
 
 On Tue, Nov 5, 2013 at 3:39 PM, Ruan Chunping <ruanchunping at gmail.com>wrote:
 
 > Dear,
 >
 > I think the bug is not resovled.
 >
 > In my stable/10 amd64 , faxgetty and faxq cost too may cpu load.
 >
 > The problem is the same as Ryan Noll  described.
 >
 > $uanem -a
 > FreeBSD dev.***.com 10.0-BETA2 FreeBSD 10.0-BETA2 #0 r257377: Thu Oct 31
 > 07:47:49 CST 2013     root at dev.***.com:/usr/obj/usr/src/sys/GENERIC_PF_ALTQ
 >  amd64
 >
 > $ pkg info|grep hylafax
 > hylafax-6.0.6                  Fax software
 >
 >
 >
 > $ ps -auxww|grep faxq
 > uucp    63466 63.1  0.1  35224   2836  -  Rs    2:55PM   25:19.28
 > /usr/local/sbin/faxq
 > $ sudo ktrace -t c -p 63466
 > $ sudo ktrace -C
 > $ sudo kdump -R
 >  63466 faxq     1383636856.659275 CALL  read(0x4,0x7fffffffcfa0,0x7ff)
 >  63466 faxq     0.000257 RET   read 0
 >  63466 faxq     0.000055 CALL
 >  select(0x5,0x7fffffffd950,0x7fffffffd8d0,0x7fffffffd850,0)
 >  63466 faxq     0.000031 RET   select 1
 >  63466 faxq     0.000026 CALL  read(0x4,0x7fffffffcfa0,0x7ff)
 >  63466 faxq     0.000024 RET   read 0
 >  63466 faxq     0.000041 CALL
 >  select(0x5,0x7fffffffd950,0x7fffffffd8d0,0x7fffffffd850,0)
 >  63466 faxq     0.000027 RET   select 1
 >  63466 faxq     0.000025 CALL  read(0x4,0x7fffffffcfa0,0x7ff)
 >  63466 faxq     0.000024 RET   read 0
 >  63466 faxq     0.000022 CALL
 >  select(0x5,0x7fffffffd950,0x7fffffffd8d0,0x7fffffffd850,0)
 >  63466 faxq     0.000023 RET   select 1
 >  63466 faxq     0.000037 CALL  read(0x4,0x7fffffffcfa0,0x7ff)
 >  63466 faxq     0.000025 RET   read 0
 >  63466 faxq     0.000024 CALL
 >  select(0x5,0x7fffffffd950,0x7fffffffd8d0,0x7fffffffd850,0)
 >  63466 faxq     0.000024 RET   select 1
 >  63466 faxq     0.000023 CALL  read(0x4,0x7fffffffcfa0,0x7ff)
 >  63466 faxq     0.000023 RET   read 0
 >  ========== more ===========
 >
 >
 > and , the /var/spool/hylafax/ is on zfs
 > $ mount
 > zroot on / (zfs, local, nfsv4acls)
 > devfs on /dev (devfs, local, multilabel)
 > zroot/data on /data (zfs, NFS exported, local, nfsv4acls)
 > zroot/data/ftp on /data/ftp (zfs, NFS exported, local, noatime, nfsv4acls)
 > zroot/data/mysql on /data/mysql (zfs, local, nfsv4acls)
 > zroot/home on /home (zfs, local, nfsv4acls)
 > zroot/tmp on /tmp (zfs, local, nfsv4acls)
 > zroot/usr on /usr (zfs, local, nfsv4acls)
 > zroot/var on /var (zfs, local, nfsv4acls)
 >
 > $ zfs get all zroot/var
 > NAME       PROPERTY              VALUE                  SOURCE
 > zroot/var  type                  filesystem             -
 > zroot/var  creation              Wed Oct 30 22:42 2013  -
 > zroot/var  used                  2.16G                  -
 > zroot/var  available             410G                   -
 > zroot/var  referenced            1.84G                  -
 > zroot/var  compressratio         1.00x                  -
 > zroot/var  mounted               yes                    -
 > zroot/var  quota                 none                   default
 > zroot/var  reservation           none                   default
 > zroot/var  recordsize            128K                   default
 > zroot/var  mountpoint            /var                   local
 > zroot/var  sharenfs              off                    default
 > zroot/var  checksum              on                     default
 > zroot/var  compression           off                    default
 > zroot/var  atime                 on                     default
 > zroot/var  devices               on                     default
 > zroot/var  exec                  on                     default
 > zroot/var  setuid                on                     default
 > zroot/var  readonly              off                    default
 > zroot/var  jailed                off                    default
 > zroot/var  snapdir               hidden                 default
 > zroot/var  aclmode               discard                default
 > zroot/var  aclinherit            restricted             default
 > zroot/var  canmount              on                     default
 > zroot/var  xattr                 off                    temporary
 > zroot/var  copies                1                      default
 > zroot/var  version               5                      -
 > zroot/var  utf8only              off                    -
 > zroot/var  normalization         none                   -
 > zroot/var  casesensitivity       sensitive              -
 > zroot/var  vscan                 off                    default
 > zroot/var  nbmand                off                    default
 > zroot/var  sharesmb              off                    default
 > zroot/var  refquota              none                   default
 > zroot/var  refreservation        none                   default
 > zroot/var  primarycache          all                    default
 > zroot/var  secondarycache        all                    default
 > zroot/var  usedbysnapshots       329M                   -
 > zroot/var  usedbydataset         1.84G                  -
 > zroot/var  usedbychildren        0                      -
 > zroot/var  usedbyrefreservation  0                      -
 > zroot/var  logbias               latency                default
 > zroot/var  dedup                 off                    default
 > zroot/var  mlslabel                                     -
 > zroot/var  sync                  standard               default
 > zroot/var  refcompressratio      1.00x                  -
 > zroot/var  written               39.2M                  -
 > zroot/var  logicalused           2.05G                  -
 > zroot/var  logicalreferenced     1.80G                  -
 >
 >
 >
 
 --001a11332dfc8f536e04ea6d3793
 Content-Type: text/html; charset=UTF-8
 Content-Transfer-Encoding: quoted-printable
 
 <div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:'cou=
 rier new',monospace">more info here:</div><div class=3D"gmail_default" =
 style=3D"font-family:'courier new',monospace"><br></div><div class=
 =3D"gmail_default">
 
 <div class=3D"gmail_default"><font face=3D"courier new, monospace">$ sudo f=
 stat -v -p=C2=A0</font><span style=3D"font-family:'courier new',mon=
 ospace;font-size:13px">63466</span></div><div class=3D"gmail_default"><font=
  face=3D"courier new, monospace">USER =C2=A0 =C2=A0 CMD =C2=A0 =C2=A0 =C2=
 =A0 =C2=A0 =C2=A0PID =C2=A0 FD MOUNT =C2=A0 =C2=A0 =C2=A0INUM MODE =C2=A0 =
 =C2=A0 =C2=A0 =C2=A0 SZ|DV R/W</font></div>
 
 <div class=3D"gmail_default"><font face=3D"courier new, monospace">uucp =C2=
 =A0 =C2=A0 faxq =C2=A0 =C2=A0 =C2=A0=C2=A0</font><span style=3D"font-family=
 :'courier new',monospace;font-size:13px">63466</span><font face=3D"=
 courier new, monospace">=C2=A0text /usr =C2=A0 =C2=A0 1630604 -r-sr-xr-x =
 =C2=A0274064 =C2=A0r</font></div>
 
 <div class=3D"gmail_default"><font face=3D"courier new, monospace">uucp =C2=
 =A0 =C2=A0 faxq =C2=A0 =C2=A0 =C2=A0=C2=A0</font><span style=3D"font-family=
 :'courier new',monospace;font-size:13px">63466</span><font face=3D"=
 courier new, monospace">=C2=A0 =C2=A0wd /var =C2=A0 =C2=A0 =C2=A0 1381 drwx=
 r-xr-x =C2=A0 =C2=A0 =C2=A020 =C2=A0r</font></div>
 
 <div class=3D"gmail_default"><font face=3D"courier new, monospace">uucp =C2=
 =A0 =C2=A0 faxq =C2=A0 =C2=A0 =C2=A0=C2=A0</font><span style=3D"font-family=
 :'courier new',monospace;font-size:13px">63466</span><font face=3D"=
 courier new, monospace">=C2=A0root / =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
 =A0 4 drwxr-xr-x =C2=A0 =C2=A0 =C2=A026 =C2=A0r</font></div>
 
 <div class=3D"gmail_default"><font face=3D"courier new, monospace">uucp =C2=
 =A0 =C2=A0 faxq =C2=A0 =C2=A0 =C2=A0=C2=A0</font><span style=3D"font-family=
 :'courier new',monospace;font-size:13px">63466</span><font face=3D"=
 courier new, monospace">=C2=A0 =C2=A0 0 /dev =C2=A0 =C2=A0 =C2=A0 =C2=A0 =
 =C2=A07 crw-rw-rw- =C2=A0 =C2=A0null rw</font></div>
 
 <div class=3D"gmail_default"><font face=3D"courier new, monospace">uucp =C2=
 =A0 =C2=A0 faxq =C2=A0 =C2=A0 =C2=A0=C2=A0</font><span style=3D"font-family=
 :'courier new',monospace;font-size:13px">63466</span><font face=3D"=
 courier new, monospace">=C2=A0 =C2=A0 1 /dev =C2=A0 =C2=A0 =C2=A0 =C2=A0 =
 =C2=A07 crw-rw-rw- =C2=A0 =C2=A0null rw</font></div>
 
 <div class=3D"gmail_default"><font face=3D"courier new, monospace">uucp =C2=
 =A0 =C2=A0 faxq =C2=A0 =C2=A0 =C2=A0=C2=A0</font><span style=3D"font-family=
 :'courier new',monospace;font-size:13px">63466</span><font face=3D"=
 courier new, monospace">=C2=A0 =C2=A0 2 /dev =C2=A0 =C2=A0 =C2=A0 =C2=A0 =
 =C2=A07 crw-rw-rw- =C2=A0 =C2=A0null rw</font></div>
 
 <div class=3D"gmail_default"><font face=3D"courier new, monospace">uucp =C2=
 =A0 =C2=A0 faxq =C2=A0 =C2=A0 =C2=A0=C2=A0</font><span style=3D"font-family=
 :'courier new',monospace;font-size:13px">63466</span><font face=3D"=
 courier new, monospace">=C2=A0 =C2=A0 3 /dev =C2=A0 =C2=A0 =C2=A0 =C2=A0 =
 =C2=A07 crw-rw-rw- =C2=A0 =C2=A0null rw</font></div>
 
 <div class=3D"gmail_default"><font face=3D"courier new, monospace">uucp =C2=
 =A0 =C2=A0 faxq =C2=A0 =C2=A0 =C2=A0=C2=A0</font><span style=3D"font-family=
 :'courier new',monospace;font-size:13px">63466</span><font face=3D"=
 courier new, monospace">=C2=A0 =C2=A0 4 /var =C2=A0 =C2=A0 =C2=A050545 prw-=
 ------ =C2=A0 =C2=A0 =C2=A0 0 =C2=A0r</font></div>
 
 <div class=3D"gmail_default"><font face=3D"courier new, monospace">uucp =C2=
 =A0 =C2=A0 faxq =C2=A0 =C2=A0 =C2=A0=C2=A0</font><span style=3D"font-family=
 :'courier new',monospace;font-size:13px">63466</span><font face=3D"=
 courier new, monospace">=C2=A0 =C2=A0 5* local dgram fffff80039013d20 <-=
 > fffff80004ef7a50</font></div>
 
 <div style=3D"font-family:'courier new',monospace"><br></div><div s=
 tyle=3D"font-family:'courier new',monospace">FD 4, it's inode i=
 s 50545</div><div><div><font face=3D"courier new, monospace">$ ls -i /var/s=
 pool/hylafax/FIFO</font></div>
 
 <div><font face=3D"courier new, monospace">50545 /var/spool/hylafax/FIFO</f=
 ont></div></div><div><font face=3D"courier new, monospace"><div>$ file /var=
 /spool/hylafax/FIFO</div><div>/var/spool/hylafax/FIFO: fifo (named pipe)</d=
 iv>
 
 <div><br></div><div><br></div><div>so ,is it a bug about=C2=A0/usr/src/sys/=
 fs/fifofs/fifo_vnops.c ?</div></font></div><div style=3D"font-family:'c=
 ourier new',monospace"><br></div><div style=3D"font-family:'courier=
  new',monospace">
 
 <br></div></div></div><div class=3D"gmail_extra"><br><br><div class=3D"gmai=
 l_quote">On Tue, Nov 5, 2013 at 3:39 PM, Ruan Chunping <span dir=3D"ltr">&l=
 t;<a href=3D"mailto:ruanchunping at gmail.com" target=3D"_blank">ruanchunping@=
 gmail.com</a>></span> wrote:<br>
 
 <blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
 x #ccc solid;padding-left:1ex"><div dir=3D"ltr"><div class=3D"gmail_default=
 " style=3D"font-family:'courier new',monospace">Dear,</div><div cla=
 ss=3D"gmail_default" style=3D"font-family:'courier new',monospace">
 
 <br></div><div class=3D"gmail_default" style=3D"font-family:'courier ne=
 w',monospace">
 I think the bug is not resovled.</div><div class=3D"gmail_default" style=3D=
 "font-family:'courier new',monospace"><br></div><div class=3D"gmail=
 _default" style=3D"font-family:'courier new',monospace">In my stabl=
 e/10 amd64 , faxgetty and faxq cost too may cpu load.</div>
 
 
 <div class=3D"gmail_default" style=3D"font-family:'courier new',mon=
 ospace"><br></div><div class=3D"gmail_default" style=3D"font-family:'co=
 urier new',monospace">The problem is the same as=C2=A0<span style=3D"fo=
 nt-size:12px;font-family:verdana,sans-serif">Ryan Noll</span><span style=3D=
 "font-size:12px;font-family:verdana,sans-serif">=C2=A0=C2=A0</span>describe=
 d.</div>
 
 
 <div class=3D"gmail_default" style=3D"font-family:'courier new',mon=
 ospace"><br></div><div class=3D"gmail_default" style=3D"font-family:'co=
 urier new',monospace">$uanem -a</div><div class=3D"gmail_default"><font=
  face=3D"courier new, monospace">FreeBSD dev.***.com 10.0-BETA2 FreeBSD 10.=
 0-BETA2 #0 r257377: Thu Oct 31 07:47:49 CST 2013 =C2=A0 =C2=A0 root at dev.***=
 .com:/usr/obj/usr/src/sys/GENERIC_PF_ALTQ =C2=A0amd64</font><br>
 
 
 </div><div class=3D"gmail_default"><font face=3D"courier new, monospace"><b=
 r></font></div><div class=3D"gmail_default"><font face=3D"courier new, mono=
 space"><div class=3D"gmail_default">$ pkg info|grep hylafax</div><div class=
 =3D"gmail_default">
 
 
 hylafax-6.0.6 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
 =A0Fax software</div><div><br></div><div><br></div><div><br></div><div><div=
 >$ ps -auxww|grep faxq</div><div>uucp =C2=A0 =C2=A063466 63.1 =C2=A00.1 =C2=
 =A035224 =C2=A0 2836 =C2=A0- =C2=A0Rs =C2=A0 =C2=A02:55PM =C2=A0 25:19.28 /=
 usr/local/sbin/faxq</div>
 
 
 </div><div>$ sudo ktrace -t c -p 63466<br></div><div>$ sudo ktrace -C</div>=
 <div><div>$ sudo kdump -R</div><div>=C2=A063466 faxq =C2=A0 =C2=A0 13836368=
 56.659275 CALL =C2=A0read(0x4,0x7fffffffcfa0,0x7ff)</div><div>=C2=A063466 f=
 axq =C2=A0 =C2=A0 0.000257 RET =C2=A0 read 0</div>
 
 
 <div>=C2=A063466 faxq =C2=A0 =C2=A0 0.000055 CALL =C2=A0select(0x5,0x7fffff=
 ffd950,0x7fffffffd8d0,0x7fffffffd850,0)</div><div>=C2=A063466 faxq =C2=A0 =
 =C2=A0 0.000031 RET =C2=A0 select 1</div><div>=C2=A063466 faxq =C2=A0 =C2=
 =A0 0.000026 CALL =C2=A0read(0x4,0x7fffffffcfa0,0x7ff)</div>
 
 
 <div>=C2=A063466 faxq =C2=A0 =C2=A0 0.000024 RET =C2=A0 read 0</div><div>=
 =C2=A063466 faxq =C2=A0 =C2=A0 0.000041 CALL =C2=A0select(0x5,0x7fffffffd95=
 0,0x7fffffffd8d0,0x7fffffffd850,0)</div><div>=C2=A063466 faxq =C2=A0 =C2=A0=
  0.000027 RET =C2=A0 select 1</div><div>=C2=A063466 faxq =C2=A0 =C2=A0 0.00=
 0025 CALL =C2=A0read(0x4,0x7fffffffcfa0,0x7ff)</div>
 
 
 <div>=C2=A063466 faxq =C2=A0 =C2=A0 0.000024 RET =C2=A0 read 0</div><div>=
 =C2=A063466 faxq =C2=A0 =C2=A0 0.000022 CALL =C2=A0select(0x5,0x7fffffffd95=
 0,0x7fffffffd8d0,0x7fffffffd850,0)</div><div>=C2=A063466 faxq =C2=A0 =C2=A0=
  0.000023 RET =C2=A0 select 1</div><div>=C2=A063466 faxq =C2=A0 =C2=A0 0.00=
 0037 CALL =C2=A0read(0x4,0x7fffffffcfa0,0x7ff)</div>
 
 
 <div>=C2=A063466 faxq =C2=A0 =C2=A0 0.000025 RET =C2=A0 read 0</div><div>=
 =C2=A063466 faxq =C2=A0 =C2=A0 0.000024 CALL =C2=A0select(0x5,0x7fffffffd95=
 0,0x7fffffffd8d0,0x7fffffffd850,0)</div><div>=C2=A063466 faxq =C2=A0 =C2=A0=
  0.000024 RET =C2=A0 select 1</div><div>=C2=A063466 faxq =C2=A0 =C2=A0 0.00=
 0023 CALL =C2=A0read(0x4,0x7fffffffcfa0,0x7ff)</div>
 
 
 <div>=C2=A063466 faxq =C2=A0 =C2=A0 0.000023 RET =C2=A0 read 0</div></div><=
 div>=C2=A0=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D more =3D=3D=3D=3D=3D=3D=3D=3D=3D=
 =3D=3D</div><div><br></div><div><br></div><div>and , the /var/spool/hylafax=
 / is on zfs=C2=A0</div><div><div>$ mount</div><div>zroot on / (zfs, local, =
 nfsv4acls)</div>
 
 
 <div>devfs on /dev (devfs, local, multilabel)</div><div>zroot/data on /data=
  (zfs, NFS exported, local, nfsv4acls)</div><div>zroot/data/ftp on /data/ft=
 p (zfs, NFS exported, local, noatime, nfsv4acls)</div><div>zroot/data/mysql=
  on /data/mysql (zfs, local, nfsv4acls)</div>
 
 
 <div>zroot/home on /home (zfs, local, nfsv4acls)</div><div>zroot/tmp on /tm=
 p (zfs, local, nfsv4acls)</div><div>zroot/usr on /usr (zfs, local, nfsv4acl=
 s)</div><div>zroot/var on /var (zfs, local, nfsv4acls)</div></div><div>
 
 
 <div><br></div><div>$ zfs get all zroot/var</div><div>NAME =C2=A0 =C2=A0 =
 =C2=A0 PROPERTY =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0VALUE =C2=
 =A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0SOURCE</div><div=
 >zroot/var =C2=A0type =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
 =A0 =C2=A0filesystem =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 -</div><div>=
 zroot/var =C2=A0creation =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0We=
 d Oct 30 22:42 2013 =C2=A0-</div>
 
 
 <div>zroot/var =C2=A0used =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =
 =C2=A0 =C2=A02.16G =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =
 =C2=A0-</div><div>zroot/var =C2=A0available =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
 =A0 =C2=A0 410G =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
 =A0 -</div><div>zroot/var =C2=A0referenced =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
 =A0 =C2=A01.84G =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
 =A0-</div><div>zroot/var =C2=A0compressratio =C2=A0 =C2=A0 =C2=A0 =C2=A0 1.=
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 --001a11332dfc8f536e04ea6d3793--


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