Re: [squid-users] squid cpu problem

Dear all
i still have the CPU spikes even when i used
disable-strict-error-checking without using Cflags

this is the gdb backtrace while the CPU spikes

0x000000000051b348 in linklistPush (L=0x11853e188, p=0xce6d4300) at
list.cc:47
47 while (*L)
(gdb) backtrace
#0 0x000000000051b348 in linklistPush (L=0x11853e188, p=0xce6d4300) at
list.cc:47
#1 0x00000000005a70a1 in UFSStoreState::write (this=0xb3970e28,
     buf=0x11fe69ca0
"!v\253r[/\307\232G\b\375`\237:\213\256^\335\373{\241%\232\363\021\071>`\342\033\177a\202G\320{\323%\236K\342\243*\332\316\351\231=\360\370\313Ro=\317\262\243\315\027\351,\221\230\353Z\023\024q\"QSC\036\214:M\242{@\351m\020\337Cw_\214\216\304\226\265\a\375\031\211\243V\222T\320\016\227\312-\211Sz\326^\346\230\251\327\222\n\373I\032\341\303==U\214\277\264\244\205\b1\346S=\230\215\204\245\254>\312\223\066\336\230PpP\227\271\370\266;\362\226\242\036\225\235w\330\325\061\316{o_\364\021\062\351\376\062|\313\006`\357m\206FQ0\021\030C\224\004]\336\315\371\033h1\361\363\350d\366\066"...,
size=4096, aOffset=-1, free_func=0x5203b0
<memNodeWriteComplete(void*)>)
     at ufs/store_io_ufs.cc:247
#2 0x0000000000554ca0 in doPages (anEntry=<optimized out>) at
store_swapout.cc:160
#3 StoreEntry::swapOut (this=0x372ca10) at store_swapout.cc:279
#4 0x000000000054c986 in StoreEntry::invokeHandlers (this=0x372ca10)
at store_client.cc:714
#5 0x00000000004dc1a7 in FwdState::complete (this=0xbb502b48) at
forward.cc:341
#6 0x00000000005579a5 in ServerStateData::completeForwarding
(this=0xf8030588) at Server.cc:239
#7 0x00000000005571bd in ServerStateData::serverComplete2
(this=0xf8030588) at Server.cc:207
#8 0x00000000004ff3dc in HttpStateData::processReplyBody
(this=0xf8030588) at http.cc:1382
#9 0x00000000004fd367 in HttpStateData::readReply (this=0xf8030588,
io=...) at http.cc:1161
#10 0x0000000000503156 in JobDialer<HttpStateData>::dial
(this=0xde75ca50, call=...) at base/AsyncJobCalls.h:175
#11 0x0000000000569ee4 in AsyncCall::make (this=0xde75ca20) at
AsyncCall.cc:34
#12 0x000000000056cb76 in AsyncCallQueue::fireNext (this=<optimized
out>) at AsyncCallQueue.cc:53
#13 0x000000000056ccf0 in AsyncCallQueue::fire (this=0x2586400) at
AsyncCallQueue.cc:39
#14 0x00000000004d385c in EventLoop::runOnce (this=0x7fffcb3518d0) at
EventLoop.cc:130
#15 0x00000000004d3938 in EventLoop::run (this=0x7fffcb3518d0) at
EventLoop.cc:94
#16 0x000000000051d35b in SquidMain (argc=<optimized out>,
argv=<optimized out>) at main.cc:1418
#17 0x000000000051dd83 in SquidMainSafe (argv=<optimized out>,
argc=<optimized out>) at main.cc:1176
#18 main (argc=<optimized out>, argv=<optimized out>) at main.cc:1168

any idea about what's causing the cpu spike

On 2014-03-31 16:34, Amos Jeffries wrote:
> On 2014-04-01 02:10, a.afach wrote:
>> Dear Eliezer
>> these are the configure options ...
>> configure options: '--prefix=/usr/local/squid-3.1.19'
>> '--sysconfdir=/etc' '--sysconfdir=/etc/squid' '--localstatedir=/var'
>> '--enable-auth=basic,digest,ntlm'
>> '--enable-removal-policies=lru,heap'
>> '--enable-digest-auth-helpers=password'
>> '--enable-basic-auth-helpers=PAM,getpwnam,NCSA,MSNT'
>> '--enable-external-acl-helpers=ip_user,session,unix_group'
>> '--enable-ntlm-auth-helpers=fakeauth'
>> '--enable-ident-lookups--enable-useragent-log'
>> '--enable-cache-digests' '--enable-delay-pools'
>> '--enable-referer-log'
>> '--enable-arp-acl' '--with-pthreads' '--with-large-files'
>> '--enable-htcp' '--enable-carp' '--enable-follow-x-forwarded-for'
>> '--enable-snmp' '--enable-ssl' '--enable-storeio=ufs,diskd,aufs'
>> '--enable-async-io' '--enable-linux-netfilter' '--enable-epoll'
>> '--with-squid=/usr/squid-3.1.19' '--disable-ipv6' '--with-aio'
>> '--with-aio-threads=128' 'build_alias=x86_64-pc-linux-gnu'
>> 'host_alias=x86_64-pc-linux-gnu' 'CC=x86_64-pc-linux-gnu-gcc'
>> 'CFLAGS=-O2 -pipe -m64 -mtune=generic' 'LDFLAGS=-Wl,-O1
>> -Wl,--as-needed' 'CXXFLAGS=' '--cache-file=/dev/null' '--srcdir=.'
>>
>
> Some more reasons to upgrade:
> * --disable-strict-error-checking avoids issues on Gentoo with
> -Werror
> * CFLAGS affects the C compiler, not the C++ compiler. C compiler is
> only used by Squid-3 to build some libraries.
> * current verified stable Gentoo Squid version is 3.3.8.
> * updating aything on Gentoo involves rebuilding a surprising number
> of components from scratch. So when you get a difference like this it
> really could be anywhere. Including buried in the compiler itself -
> your flags are possibly changing optimization levels and CPU-specific
> assembly instructions used by it.
>
> Amos
Received on Fri Apr 04 2014 - 12:59:56 MDT