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Title: excessive CPU usage in 0.6.2 ? Post by: kjj on June 15, 2012, 12:39:10 PM Ever since I upgraded to 0.6.2, all of my CPUs have been pinned at 100% usage. Anyone else having similar problems?
Here is a 11 year old Athlon XP 1800+ running 0.6.0: Quote root@inana:~# ps waxuf | grep bitcoin bitcoind 27316 0.5 20.5 200604 102428 ? SLsl 05:16 0:35 /usr/local/bin/bitcoind -conf=/etc/bitcoin/bitcoin.conf -pid=/etc/bitcoin/pid -daemon -datadir=/etc/bitcoin/ -noirc And a modern Celeron G440 running 0.6.2: Quote root@linuxcoin:/opt/logs# ps waxuf | grep bitcoind root 27863 0.0 0.0 7740 836 pts/6 S+ 11:59 0:00 \_ grep bitcoind root 3566 60.0 1.3 222240 106664 ? SLsl 01:44 369:33 /usr/bin/bitcoind -conf=/etc/bitcoin.conf -pid=/var/run/bitcoind.pid -daemon -datadir=/opt/bitram/ root 3567 0.0 0.0 3924 324 ? Ss 01:44 0:00 startpar -f -- bitcoind Before the upgrade, the Celerons were quite snappy and responsive. Now, it can take several minutes (really!) to run a simple bitcoind getinfo. And it isn't an I/O problem, the Celerons are totally diskless, running entirely out of RAM, like they have been for the last few months. Title: Re: excessive CPU usage in 0.6.2 ? Post by: rav3n_pl on June 15, 2012, 07:48:45 PM I feel same thing on my 3 core Athlon. Windows 7/64bit. Bitcoin-qt and bicoind is eating one full core for 3-5 seconds every 10-15 seconds. At same time disk usage is spiking to max transfer.
On image upper row is CPU, it is spiking to 33% (one core). Lower one is disk usage, spikes are over 40MB/s (my max data rate). http://s12.postimage.org/zfutkf4x7/bicoin.png Title: Re: excessive CPU usage in 0.6.2 ? Post by: Diapolo on June 15, 2012, 09:27:08 PM At least for Bitcoin-Qt some internals were re-worked to lower CPU usage with 0.7, mainly while downloading the block-chain. I have no idea for bitcoind though.
Dia Title: Re: excessive CPU usage in 0.6.2 ? Post by: deepceleron on June 15, 2012, 09:27:46 PM Bitcoind 0.6.2 Win7 x32 with affinity set to cpu3:
The first 1/3 of the cpu graphs is catching up with blocks, the rest is sitting idle. http://we.lovebitco.in/img/bitcoind-cpuusage.png Core2 Quad @ 2.4GHz = no such issues PS C:\Program Files\Bitcoin\daemon> get-process bitcoind | format-list * Keep in mind these days there is a bit of work to do when you get a new block, looking up and reindexing balances when it has 1000 dicespam transactions in it. Title: Re: excessive CPU usage in 0.6.2 ? Post by: rav3n_pl on June 15, 2012, 09:56:24 PM Keep in mind these days there is a bit of work to do when you get a new block, looking up and reindexing balances when it has 1000 dicespam transactions in it. But we NOT have block each 10-15 sec, right? And usage is spiking about every 10-15 sec, not 10mins like blocks...Title: Re: excessive CPU usage in 0.6.2 ? Post by: Gavin Andresen on June 16, 2012, 12:53:00 AM The 0.7 release will include an optimization that should help a lot (transaction signature cache -- prior releases checked signatures when the transaction was first seen, and then checked again when a new block was received, it makes processing new blocks much faster).
Title: Re: excessive CPU usage in 0.6.2 ? Post by: mrb on June 20, 2012, 07:04:54 AM kjj, run this to sample what bitcoind is doing:
Quote $ gdb -ex "set pagination 0" -ex "thread apply all bt" --batch -p $(pidof bitcoind) Quite useful as a quick way to profile a running process... Title: Re: excessive CPU usage in 0.6.2 ? Post by: gmaxwell on June 20, 2012, 01:20:41 PM But we NOT have block each 10-15 sec, right? And usage is spiking about every 10-15 sec, not 10mins like blocks... You receive transactions at that rate. |
