Date: Wed, 6 Nov 2013 14:27:47 GMT From: Chunping Ruan <ruanchunping@gmail.com> To: freebsd-gnats-submit@FreeBSD.org Subject: kern/183717: High CPU Utilization on HylaFAX processes Message-ID: <201311061427.rA6ERlEf099930@oldred.freebsd.org> Resent-Message-ID: <201311061430.rA6EU0Hl085553@freefall.freebsd.org>
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>Number: 183717 >Category: kern >Synopsis: High CPU Utilization on HylaFAX processes >Confidential: no >Severity: non-critical >Priority: low >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Wed Nov 06 14:30:00 UTC 2013 >Closed-Date: >Last-Modified: >Originator: Chunping Ruan >Release: stable/10 >Organization: Malmam Ltd. >Environment: FreeBSD dev.******.com 10.0-BETA2 FreeBSD 10.0-BETA2 #0 r257377: Thu Oct 31 07:47:49 CST 2013 root@dev.******.com:/usr/obj/usr/src/sys/GENERIC_PF_ALTQ amd64 >Description: The problem is the same as kern/166071 described. The box is installed 9.1-RELEASE,and updated to stable/10 with custom kernel(add PF_ALTQ support). Install hylafax from posts. $ pkg info|grep hylafax hylafax-6.0.6 Fax software faxgetty and faxq cost too many cpu load.(>70% system.) and can't receive or send fax. $ 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 - $ 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) >How-To-Repeat: freebsd: amd64 stable/10 install hylafax from posts and start it. edit /etc/ttys,add this line: cuau0 "/usr/local/sbin/faxgetty" dialup on kill -HUP 1 than call the fax modem from another phone. monit the cpu usage from top. >Fix: Everything is ok from 7.1 to 8.2-RELEASE, and worked for 3 years. so ,is it a bug about /usr/src/sys/fs/fifofs/fifo_vnops.c ? >Release-Note: >Audit-Trail: >Unformatted:
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