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Bug 18508 - 2.4.20-gentoo-r2 sources gives me a IP stack faulty in SMP system, and other strange behaviours
Summary: 2.4.20-gentoo-r2 sources gives me a IP stack faulty in SMP system, and other ...
Status: RESOLVED FIXED
Alias: None
Product: Gentoo Linux
Classification: Unclassified
Component: [OLD] Core system (show other bugs)
Hardware: x86 Linux
: High major (vote)
Assignee: x86-kernel@gentoo.org (DEPRECATED)
URL: http://mega.ist.utl.pt/~mmsf/config.txt
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2003-03-30 20:29 UTC by Miguel Sousa Filipe
Modified: 2003-04-20 12:19 UTC (History)
0 users

See Also:
Package list:
Runtime testing required: ---


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Description Miguel Sousa Filipe 2003-03-30 20:29:38 UTC
Well, ip packets were having NEGATIVE rtt's 
.. pings with 0.0 ms while not even the loopback I get that kind of times(0.1ms)
hpings showed me -3000ms ... followed by 3000ms rtts.. things like that..

xmms/mpg123/mpg321 consumes 15% of cpu in a dual-athlon 1500+ with 512Mb ram.. 
wich is VERY WEIRD...
inconsistend/unstable download speeds ..
cpu usage/system load is high (0.50+/-) when I idling around..
big cpu spikes for all and for nothing.. things like moving the mouse.. etc..

the pasted URL is my .config that generated my kernel.

not tried gentoo-r1
2.4.19-gentoo-r9 and before were very good.

this is a not good!!!

Reproducible: Always
Steps to Reproduce:
1.book
2.play mp3s on xmms
3. do hping's to some network machines



Expected Results:  
low load, ridiculous cpu load in xmms, GOOD rtts in IP packets.



I'M NOT USING THE ABOVE MENTIONED KERNEL SINCE IS GIVING ME SOME HARD TIME.

Portage 2.0.47-r10 (default-x86-1.4, gcc-3.2.2, glibc-2.3.1-r4)
=================================================================
System uname: 2.4.19-gentoo-r9 i686 AMD Athlon(TM) MP 1500+
GENTOO_MIRRORS="ftp://ftp.rnl.ist.utl.pt/gentoo http://gentoo.oregonstate.edu/ h
           
ttp://distro.ibiblio.org/pub/Linux/distributions/gentoo"
CONFIG_PROTECT="/etc /var/qmail/control /usr/share/config /usr/kde/2/share/confi
           
g /usr/kde/3/share/config /usr/X11R6/lib/X11/xkb"
CONFIG_PROTECT_MASK="/etc/gconf /etc/env.d"
PORTDIR="/usr/portage"
DISTDIR="/usr/portage/distfiles"
PKGDIR="/usr/portage/packages"
PORTAGE_TMPDIR="/var/tmp"
PORTDIR_OVERLAY=""
USE="x86 oss 3dnow apm avi encode gif jpeg libg++ libwww mikmod mmx mpeg ncurses
           
 nls pdflib png quicktime spell truetype xml2 xmms xv zlib gdbm berkdb slang rea
           
dline svga tcltk guile sdl gpm tcpd pam perl python imlib oggvorbis qt motif ope
           
ngl mozilla cdr X threads gtk ipv6 crypt ssl gtk2 sse java alsa -gnome -esd -kde
           
 -cups -arts"
COMPILER="gcc3"
CHOST="i686-pc-linux-gnu"
CFLAGS="-march=athlon-mp -O2 -pipe -fomit-frame-pointer"
CXXFLAGS="-march=athlon-mp -O2 -pipe -fomit-frame-pointer"
ACCEPT_KEYWORDS="x86"
MAKEOPTS="-j5"
AUTOCLEAN="yes"
SYNC="rsync://rsync.gentoo.org/gentoo-portage"
FEATURES="sandbox ccache userpriv usersandbox"
Comment 1 Jay Pfeifer (RETIRED) gentoo-dev 2003-04-15 19:42:02 UTC
please try on gentoo-sources-2.4.20-r3 and post the results. 
 
Thanks, 
 
Jay 
Comment 2 Miguel Sousa Filipe 2003-04-20 11:50:31 UTC
Ok, tried -r3 with the same config, or at least one very very similar, and its good.

none of the before mencioned problems.

btw, can you tell me what caused the bug, or might cause such a "bug", I'm pretty curious and I love kernel stuph...

thanx! :-p
Comment 3 Jay Pfeifer (RETIRED) gentoo-dev 2003-04-20 12:19:54 UTC
closed as per user. 
 
fyi - it probably was related to the scheduler implemented in r2. we had to fix process 
priorities (broken in r1) and there may have been issues on smp systems that were not seen 
during testing. but, it may have been other issues since i did not see your kernel config. 
 
Jay