Date: Fri, 3 Oct 2008 06:50:05 GMT From: Vladimir Grebenschikov <vova@parallels.com> To: freebsd-emulation@FreeBSD.org Subject: Re: kern/97326: [linux] file descriptor leakage in linux emulation Message-ID: <200810030650.m936o55G018523@freefall.freebsd.org>
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The following reply was made to PR kern/97326; it has been noted by GNATS.
From: Vladimir Grebenschikov <vova@parallels.com>
To: bug-followup@FreeBSD.org, bakul@bitblocks.com
Cc: Chagin Dmitry <dchagin@FreeBSD.org>
Subject: Re: kern/97326: [linux] file descriptor leakage in linux emulation
Date: Fri, 03 Oct 2008 10:09:01 +0400
I can confirm - skype does not leak descriptors after first call.
Tested on 8-CURRENT.
FreeBSD vbook.fbsd.ru 8.0-CURRENT FreeBSD 8.0-CURRENT #4: Wed Oct 1
08:03:48 MSD 2008 root@vbook.fbsd.ru:/usr/obj/usr/src/sys/VBOOK
i386
# pkg_info -I linux_base\* skype\*
linux_base-f8-8_4 Base set of packages needed in Linux mode (for
i386/amd64)
skype-2.0.0.72,1 P2P VoIP software
# sysctl compat.linux
compat.linux.oss_version: 198144
compat.linux.osrelease: 2.6.16
compat.linux.osname: Linux
#
Analysis of open descriptors:
$ lsof | fgrep skype | awk '{ print $9; }' | sort | uniq -c | sort -nr
88
16 /usr/home/vova/.kde/share/config/kioslaverc
16 *:35644
8 localhost:18001
8 10.30.1.111:24183->ppp85-140-221-4.pppoe.mtu-net.ru:23909
8 /usr/local/lib/X11/fonts/webfonts/verdanab.ttf
8 /usr/local/lib/X11/fonts/webfonts/verdana.ttf
8 /usr/local/lib/X11/fonts/bitstream-vera/VeraBd.ttf
8 /usr/local/lib/X11/fonts/bitstream-vera/Vera.ttf
8 /usr/local/bin/skype
8 /usr/home/vova/.Skype/nickname/voicemail256.dbb
8 /usr/home/vova/.Skype/nickname/user4096.dbb
8 /usr/home/vova/.Skype/nickname/user16384.dbb
8 /usr/home/vova/.Skype/nickname/user1024.dbb
8 /usr/home/vova/.Skype/nickname/transfer256.dbb
8 /usr/home/vova/.Skype/nickname/profile16384.dbb
8 /usr/home/vova/.Skype/nickname/message512.dbb
8 /usr/home/vova/.Skype/nickname/message4096.dbb
8 /usr/home/vova/.Skype/nickname/message256.dbb
8 /usr/home/vova/.Skype/nickname/message1024.dbb
8 /usr/home/vova/.Skype/nickname/index2.dat
8 /usr/home/vova/.Skype/nickname/contactgroup512.dbb
8 /usr/home/vova/.Skype/nickname/contactgroup256.dbb
8 /usr/home/vova/.Skype/nickname/chatsync/93/933e6de4e914de3f.dat
8 /usr/home/vova/.Skype/nickname/chatsync/90/90443626f418d589.dat
8 /usr/home/vova/.Skype/nickname/chatsync/57/57d806a6d7ff6809.dat
8 /usr/home/vova/.Skype/nickname/chatsync/56/56187794f108deaf.dat
8 /usr/home/vova/.Skype/nickname/chatsync/03/03d2e8678e8cb7ce.dat
8 /usr/home/vova/.Skype/nickname/chatmsg512.dbb
8 /usr/home/vova/.Skype/nickname/chatmsg256.dbb
8 /usr/home/vova/.Skype/nickname/chatmsg2048.dbb
8 /usr/home/vova/.Skype/nickname/chatmsg1024.dbb
8 /usr/home/vova/.Skype/nickname/chatmember256.dbb
8 /usr/home/vova/.Skype/nickname/chat512.dbb
8 /usr/home/vova/.Skype/nickname/chat4096.dbb
8 /usr/home/vova/.Skype/nickname/chat2048.dbb
8 /usr/home/vova/.Skype/nickname/callmember256.dbb
8 /usr/home/vova/.Skype/nickname/call256.dbb
8 /usr/home/vova
8 /usr/compat/linux/usr/lib/libstdc++.so.6.0.8
8 /usr/compat/linux/usr/lib/libfreetype.so.6.3.16
8 /usr/compat/linux/usr/lib/libfontconfig.so.1.0.4
8 /usr/compat/linux/usr/lib/libexpat.so.0.5.0
8 /usr/compat/linux/usr/lib/gconv/UTF-16.so
8 /usr/compat/linux/usr/X11R6/lib/libXv.so.1.0
8 /usr/compat/linux/usr/X11R6/lib/libXss.so.1.0
8 /usr/compat/linux/usr/X11R6/lib/libXrender.so.1.2.2
8 /usr/compat/linux/usr/X11R6/lib/libXrandr.so.2.0
8 /usr/compat/linux/usr/X11R6/lib/libXinerama.so.1.0
8 /usr/compat/linux/usr/X11R6/lib/libXi.so.6.0
8 /usr/compat/linux/usr/X11R6/lib/libXfixes.so.3.0
8 /usr/compat/linux/usr/X11R6/lib/libXext.so.6.4
8 /usr/compat/linux/usr/X11R6/lib/libXcursor.so.1.0.2
8 /usr/compat/linux/usr/X11R6/lib/libX11.so.6.2
8 /usr/compat/linux/usr/X11R6/lib/libSM.so.6.0
8 /usr/compat/linux/usr/X11R6/lib/libICE.so.6.3
8 /usr/compat/linux/usr/X11R6/lib/X11/locale/lib/common/xomGeneric.so.2
8 /usr/compat/linux/usr/X11R6/lib/X11/locale/lib/common/xlcDef.so.2
8 /usr/compat/linux/usr/X11R6/lib/X11/locale/lib/common/ximcp.so.2
8 /usr/compat/linux/lib/libz.so.1.2.3
8 /usr/compat/linux/lib/librt-2.7.so
8 /usr/compat/linux/lib/libresolv-2.7.so
8 /usr/compat/linux/lib/libpthread-2.7.so
8 /usr/compat/linux/lib/libnss_files-2.7.so
8 /usr/compat/linux/lib/libnss_dns-2.7.so
8 /usr/compat/linux/lib/libm-2.7.so
8 /usr/compat/linux/lib/libgcc_s-4.1.2-20070925.so.1
8 /usr/compat/linux/lib/libdl-2.7.so
8 /usr/compat/linux/lib/libc-2.7.so
8 /usr/compat/linux/lib/libasound.so.2.0.0
8 /usr/compat/linux/lib/ld-2.7.so
8 /usr
8 /dev/null
8 /
1 /usr/local/share/applications/skype.desktop
$ lsof | fgrep skype | awk ' ($9 == "") { print $5; }' | sort | uniq -c
64 PIPE
24 unix
$
Looks like everything goes as expected - linux's clone() makes copy of
all file-handlers per thread. So we have about ~90 (handlers per thread)
* 8 (threads) = ~700 open file-handlers.
Need to check, but I think, same picture should be on Linux.
MacOS contrary, should have better thread support.
Probably, somebody encourages skype.com to build native FreeBSD version
of skype ?
--
Vladimir B. Grebenschikov
Parallels Inc. vova@parallels.com
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