Hello.
I was performing some benchmarks of http transfer with program 'ab'
(apache benchmark), comparing, how it will perform with/without
kernel khttpd support.
I've got oops several times, the error is replicable on my machine,
without appache even started.
The exact order of actions i did:
modprobe khttpd
I let the default configuration for first try ( threads=2, maxconnect=1000,
clientport=80, serverport=8080...)
echo 1 > /proc/sys/net/khttpd/start
ab -n 1000 http://localhost:8080/icons/logo.gif (included as attachement)
and everithing goes well for now, really pretty boost.
echo 1 > /proc/sys/net/khttpd/stop
got message: Daemon 1 has ended, Daemon 0 has ended
After this step, i see from ps aux: [khttpd - 0 <defunct>]
Now, stopped the httpd accelerator and increased number of threads to four:
echo 1 > /proc/sys/net/khttpd/stop
echo 4 > /proc/sys/net/khttpd/threads
Restarted khttpd:
echo 1 > /proc/sys/net/khttpd/start
(i see some defunct-ed threads too now)
Then i reruned the 'ab' benchmark like above:
ab -n 1000 http://localhost:8080/icons/logo.gif
and the oops become.
If i optionally make yet another try of 'ab' benchmark after this oops,
i get another oops of type "Aieee in interrupt...killing interrupt"...
-----------------------------------------
Here are infos:
ksymoops 2.3.7 on i586 2.4.3-ac3. Options used
-v /usr/src/linux/vmlinux (specified)
-k ./ksyms (specified)
-l ./modules (specified)
-o /lib/modules/2.4.3-ac3/ (specified)
-m /usr/src/linux/System.map (specified)
Apr 14 14:44:04 Boris kernel: Oops: 0000
Apr 14 14:44:04 Boris kernel: CPU: 0
Apr 14 14:44:04 Boris kernel: EIP: 0010:[<c01bd9a8>]
Using defaults from ksymoops -t elf32-i386 -a i386
Apr 14 14:44:04 Boris kernel: EFLAGS: 00010202
Apr 14 14:44:04 Boris kernel: eax: 00000000 ebx: c141702c ecx: 00000004 edx:
00000004
Apr 14 14:44:04 Boris kernel: esi: 00000000 edi: c2897a01 ebp: 00000000 esp:
c1415f14
Apr 14 14:44:04 Boris kernel: ds: 0018 es: 0018 ss: 0018
Apr 14 14:44:04 Boris kernel: Process khttpd - 0 (pid: 1016, stackpage=c1415000)
Apr 14 14:44:04 Boris kernel: Stack: c0000000 c1417000 c289638a 00000000 c2897a01
c141702c c0000000 c1417000
Apr 14 14:44:04 Boris kernel: 00000000 00000000 00000000 00000000 00000000
00000000 c2897538 00000000
Apr 14 14:44:04 Boris kernel: 00000000 c1417000 c02c936c c1417000 00000000
c2899e80 00000000 00000fff
Apr 14 14:44:04 Boris kernel: Call Trace: [<c289638a>] [<c2897a01>] [<c2897538>]
[<c2899e80>] [<c28973e6>] [<c28951f1>] [<c2898e40>]
Apr 14 14:44:04 Boris kernel: [<c2898e00>] [<c010542c>] [<c2898e40>]
[<c2898e40>]
Apr 14 14:44:04 Boris kernel: Code: f3 a6 74 0a 96 46 80 78 ff 00 75 ec 31 c0 5e 5f c3
90 90 90
>>EIP; c01bd9a8 <strstr+20/38> <=====
Trace; c289638a <[khttpd]ParseHeader+26/2dc>
Trace; c2897a01 <[khttpd].rodata.start+361/6ed>
Trace; c2897538 <[khttpd]DecodeHeader+b4/198>
Trace; c2899e80 <[khttpd]Buffer+180/37f>
Trace; c28973e6 <[khttpd]WaitForHeaders+76/b8>
Trace; c28951f1 <[khttpd]MainDaemon+155/218>
Trace; c2898e40 <[khttpd]CountBuf+0/40>
Trace; c2898e00 <[khttpd]Running+0/40>
Trace; c010542c <kernel_thread+28/38>
Trace; c2898e40 <[khttpd]CountBuf+0/40>
Trace; c2898e40 <[khttpd]CountBuf+0/40>
Code; c01bd9a8 <strstr+20/38>
00000000 <_EIP>:
Code; c01bd9a8 <strstr+20/38> <=====
0: f3 a6 repz cmpsb %es:(%edi),%ds:(%esi) <=====
Code; c01bd9aa <strstr+22/38>
2: 74 0a je e <_EIP+0xe> c01bd9b6 <strstr+2e/38>
Code; c01bd9ac <strstr+24/38>
4: 96 xchg %eax,%esi
Code; c01bd9ad <strstr+25/38>
5: 46 inc %esi
Code; c01bd9ae <strstr+26/38>
6: 80 78 ff 00 cmpb $0x0,0xffffffff(%eax)
Code; c01bd9b2 <strstr+2a/38>
a: 75 ec jne fffffff8 <_EIP+0xfffffff8> c01bd9a0
<strstr+18/38>
Code; c01bd9b4 <strstr+2c/38>
c: 31 c0 xor %eax,%eax
Code; c01bd9b6 <strstr+2e/38>
e: 5e pop %esi
Code; c01bd9b7 <strstr+2f/38>
f: 5f pop %edi
Code; c01bd9b8 <strstr+30/38>
10: c3 ret
Code; c01bd9b9 <strstr+31/38>
11: 90 nop
Code; c01bd9ba <strstr+32/38>
12: 90 nop
Code; c01bd9bb <strstr+33/38>
13: 90 nop
---------------------------------------------
cat /proc/modules:
khttpd 21072 5
autofs4 8128 6 (autoclean)
3c509 6896 1 (autoclean)
awe_wave 155936 0
sb 7008 0
sb_lib 32368 0 [sb]
uart401 6000 0 [sb_lib]
sound 52704 0 [awe_wave sb_lib uart401]
nls_iso8859-1 2848 2 (autoclean)
nls_cp437 4352 2 (autoclean)
vfat 8400 2 (autoclean)
fat 29120 0 (autoclean) [vfat]
floppy 45872 0 (autoclean)
ide-cd 25904 0 (autoclean)
cdrom 27008 0 (autoclean) [ide-cd]
-----------------------------------------------------------
ver_linux script:
Linux Boris 2.4.3-ac3 #1 Fri Apr 13 20:48:04 CEST 2001 i586 unknown
Gnu C 2.95.3
Gnu make 3.79.1
binutils 2.10.0.24
util-linux 2.10o
mount 2.10o
modutils 2.4.5
e2fsprogs 1.19
PPP 2.4.0
Linux C Library 2.1.3
Dynamic linker (ldd) 2.1.3
Procps 2.0.7
Net-tools 1.57
Console-tools 0.2.3
Sh-utils 2.0
Modules Loaded khttpd autofs4 3c509 awe_wave sb sb_lib uart401 sound
nls_iso8859-1 nls_cp437 vfat fat floppy ide-cd cdrom
-------------------------------------------------------------
cat /proc/cpuinfo:
processor : 0
vendor_id : GenuineIntel
cpu family : 5
model : 4
model name : Pentium MMX
stepping : 3
cpu MHz : 167.047
fdiv_bug : no
hlt_bug : no
f00f_bug : yes
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 1
wp : yes
flags : fpu vme de pse tsc msr mce cx8 mmx
bogomips : 333.41
Maybe i did something stuppid, eg. it's required to unload httpd first
before changing number of threads. In this case or in case this
problem already is/was solved, i'm sorry.
Regards B.
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