1 2012-12-16 00:01:13 <MC-Eeepc> what values of dbcache are you expecting to have the biggest benefit
  2 2012-12-16 00:01:20 <MC-Eeepc> or does it depend on other factors
  3 2012-12-16 00:01:27 btcven has joined
  4 2012-12-16 00:05:15 <sipa> more than 38 is pointless for testnet
  5 2012-12-16 00:05:26 <sipa> as that's enough to do the entire IBD in RAM
  6 2012-12-16 00:10:16 <MC-Eeepc> - Connect 2587 transactions: 249.60ms (0.096ms/tx, 0.043ms/txin)
  7 2012-12-16 00:10:46 <MC-Eeepc> - Verify 5801 txins: 32917.18ms (5.674ms/txin)
  8 2012-12-16 00:11:57 <sipa> that's... slow
  9 2012-12-16 00:12:15 <MC-Eeepc> thats what it looks like when it gets stuck
 10 2012-12-16 00:12:24 <MC-Eeepc> block 4109 does it lol
 11 2012-12-16 00:12:40 <sipa> yeah, that's probably one of the 'horrible' blocks in testnet
 12 2012-12-16 00:13:00 <MC-Eeepc> yep picked up again now
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 15 2012-12-16 00:16:19 <gmaxwell> You don't like my blocks? :P
 16 2012-12-16 00:18:54 <gmaxwell> heh. checkout the coinbase on that one (it's 4110 not 4109)
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 20 2012-12-16 00:25:52 <sipa> what's strange about it?
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 22 2012-12-16 00:30:31 <MC-Eeepc> greg makes trollblocks
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 30 2012-12-16 00:58:37 <MC-Eeepc> 12/16/12 00:42:46 Loaded 39952 blocks from external file in 3251225ms
 31 2012-12-16 00:58:37 <MC-Eeepc> 12/16/12 00:42:46 Unable to open file E:\blockchain\testnet3\blocks\blk00001.dat
 32 2012-12-16 00:58:38 <MC-Eeepc> 12/16/12 00:42:46 Reindexing finished
 33 2012-12-16 00:58:50 <MC-Eeepc> and now its stuck on 1 block remaining
 34 2012-12-16 00:59:03 <MC-Eeepc> strange
 35 2012-12-16 01:00:23 <sipa> oh, known bug; it just doesn't restart the IBD mechanism until a new block is announced
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 52 2012-12-16 01:57:30 <BlueMatt> sipa: hmm...I thought I had added that previously, Ill go do that. re: different hash init, meh...if Im gonna bother changing it, might as well just be nHashNum + nTweak
 53 2012-12-16 01:57:37 <BlueMatt> (its not like murmur3 is that bad)
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 55 2012-12-16 02:01:24 <sipa> but but... you've got no idea how much cpu time it cost me to find the optimal multiplier!
 56 2012-12-16 02:01:53 <sipa> more seriously, it doesn't matter indeed
 57 2012-12-16 02:03:27 <sipa> or at least it shouldn't
 58 2012-12-16 02:03:54 <sipa> BlueMatt: the partial hash tree probably needs some examples to illustrate, but meh...
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 65 2012-12-16 02:20:23 <swaits> what's the best practice for determining a final balance for an arbitrary address? apparently I can't determine this just from bitcoind's RPC?
 66 2012-12-16 02:20:24 <BlueMatt> sipa: heh, so you did actually run something for optimal multiplier (I was thinking of coding that up...)
 67 2012-12-16 02:20:48 <sipa> BlueMatt: yes, i was intrigued by the question :)
 68 2012-12-16 02:20:51 <BlueMatt> sipa: and...yea, I was lazy with the pmt docs, I just figured your comment was good enough and anyone else can dig into the code
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 70 2012-12-16 02:21:09 <gmaxwell> I assumed sipa searched for a good multiplier.
 71 2012-12-16 02:21:10 <BlueMatt> sipa: its certainly a fun problem
 72 2012-12-16 02:21:20 <gmaxwell> (thats what I would have done! :P)
 73 2012-12-16 02:21:55 <BlueMatt> gmaxwell: I assumed he did something, not run simulations, though thats also what I would have done (not that it counts for as much...)
 74 2012-12-16 02:23:48 <sipa> BlueMatt: the number i came up with guarantees a 10-bit difference between any two inits for any tweak, and on average close to 100 bits
 75 2012-12-16 02:23:52 <sipa> eh, 11 bits
 76 2012-12-16 02:25:56 <BlueMatt> nice
 77 2012-12-16 02:26:30 <sipa> it's not guaranteed to be the best possible, but likely very clos
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 79 2012-12-16 02:27:03 <BlueMatt> well now I cant but change it...
 80 2012-12-16 02:27:16 <sipa> haha :D
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 85 2012-12-16 02:35:23 <BlueMatt> might as well state this here for anyone else (dont see any evidence it effects x86): probably a bad idea to run bitcoind on arm, it seems to like to crash with bad_allocs after a while
 86 2012-12-16 02:38:35 <sipa> what are you trying to run it on?
 87 2012-12-16 02:39:41 <BlueMatt> http://www.hardkernel.com/renewal_2011/products/prdt_info.php?g_code=g133999328931 (Samsung Exynos 4412)
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 89 2012-12-16 02:53:53 <jgarzik> BlueMatt: BE or LE?
 90 2012-12-16 02:54:16 <jgarzik> if LE, it is probably unaligned accesses somewhere
 91 2012-12-16 02:54:32 <BlueMatt> LE, yea, thats why gmaxwell suggested, it sounds like a probably source
 92 2012-12-16 02:54:50 <BlueMatt> itl run for a few days before falling over, but its probably not safe...
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 95 2012-12-16 02:58:14 <BlueMatt> https://github.com/bitcoin/bitcoin/issues/2111
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 97 2012-12-16 02:59:03 <sipa> bad_alloc only gets thrown by new afaik
 98 2012-12-16 02:59:22 <BlueMatt> I believe so
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100 2012-12-16 03:05:13 <phantomcircuit> hmm
101 2012-12-16 03:05:53 <phantomcircuit> im starting to think that adding a default nice(1) to bitcoin{d,-qt} would be a good idea...
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103 2012-12-16 03:06:20 <Luke-Jr> phantomcircuit: ionice moreso
104 2012-12-16 03:06:49 <phantomcircuit> yeah
105 2012-12-16 03:08:07 <gmaxwell> phantomcircuit: ioload s much much less of an issue on git.
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108 2012-12-16 03:08:42 <phantomcircuit> still there's very little reason that bitcoin should be running with the same priority as the rest of the system
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110 2012-12-16 03:09:00 <phantomcircuit> actually just certain threads but the same basic point still holds
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115 2012-12-16 03:11:19 <gmaxwell> is there something like ionice in windows?
116 2012-12-16 03:11:46 <gmaxwell> also, would nicing it out just result in @#$#@$#@ windows killing it? :(
117 2012-12-16 03:12:36 <gmaxwell> "this application hasn't responded in 3ms. Because we're confused and think we're a cooperative multitasking operating system we're going to put this big idiot button in front of you right now to kill your program."
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122 2012-12-16 03:15:07 <sipa> Vista and above: http://msdn.microsoft.com/en-us/library/windows/hardware/ff549710(v=vs.85).aspx
123 2012-12-16 03:15:42 <sipa> OSX doesn't have anything similar, it seems
124 2012-12-16 03:16:06 <Luke-Jr> "(Windows Drivers)"
125 2012-12-16 03:16:16 <Luke-Jr> don't think we want to write a driver :|
126 2012-12-16 03:17:17 <phantomcircuit> sipa, yeah you're looking at kernel driver api
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128 2012-12-16 03:17:55 <sipa> ha!
129 2012-12-16 03:18:19 <sipa> that's probably a good way to get better windows performance: have bitcoin run in kernel space :p
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132 2012-12-16 03:34:07 <phantomcircuit> sipa, io priority on windows is linked to cpu priority
133 2012-12-16 03:34:23 <phantomcircuit> so the only thing that needs to happen is SetPriorityClass
134 2012-12-16 03:34:43 <phantomcircuit> possibly SetThreadPriority so the gpu doesn't get stuck
135 2012-12-16 03:34:47 <phantomcircuit> *gui
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142 2012-12-16 03:52:36 <nus> http://www.bitsum.com/pl_io_priority.php
143 2012-12-16 03:59:26 <pingdrive> does anyone know how  to splice a two dimension  java array?
144 2012-12-16 04:01:37 <pingdrive> grr slice
145 2012-12-16 04:05:42 <gmaxwell> phantomcircuit: I'd worry about the gui thread spinning on locks held by background stuff.
146 2012-12-16 04:07:49 <phantomcircuit> gmaxwell, yeah there is that risk
147 2012-12-16 04:07:55 <phantomcircuit> but done properly it could work
148 2012-12-16 04:08:07 <phantomcircuit> might not be worth the effort though
149 2012-12-16 04:13:42 <gmaxwell> phantomcircuit: might as well just have a bitocoin nice level that inserts yields in between expensive operations
150 2012-12-16 04:14:04 <phantomcircuit> hmm
151 2012-12-16 04:14:06 <phantomcircuit> yeah i guess
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169 2012-12-16 05:34:11 <gmaxwell> sipa: seems we don't handle the blktree not being openable gracefully:
170 2012-12-16 05:34:12 <gmaxwell> EXCEPTION: St13runtime_error
171 2012-12-16 05:34:12 <gmaxwell> CLevelDB(): error opening database environment Invalid argument: not an sstable (bad magic number)
172 2012-12-16 05:34:15 <gmaxwell> bitcoin in AppInit()
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175 2012-12-16 05:47:31 <gmaxwell> The leveldb code is _much_ more robust against corrupt database input than bdb, even with the checksums disabled.
176 2012-12-16 05:47:37 <gmaxwell> BDB was trivial to make crash with corruption.
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178 2012-12-16 05:53:15 <gmaxwell> oh neat. I got a testnet database into a state that has no blocks and can't be recovered from with reindex or loadblock.
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186 2012-12-16 06:19:15 <sta> screw you gmaxwell
187 2012-12-16 06:19:43 <sta> ^ that was a reflex to seeing too many gmaxwell lines on my screen
188 2012-12-16 06:20:38 <sta> and it's ugly and green
189 2012-12-16 06:21:05 <sta> should have kept the ignore
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263 2012-12-16 12:27:32 <st1> i won't say it. i won't argue. with some people, you don't want to argue
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268 2012-12-16 12:45:09 <st1> because he added some easy ones, just after the "event"
269 2012-12-16 12:45:16 <st1> but he doesn't get me
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292 2012-12-16 13:55:41 <MC-Eeepc> anyone tried running ecdsa checking on GPU?
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295 2012-12-16 14:03:55 <sipa> MC-Eeepc: won't be too easy to implement i think
296 2012-12-16 14:04:43 <sipa> MC-Eeepc: oclvanitygen has a EC addition on GPU
297 2012-12-16 14:05:21 <MC-Eeepc> cool
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299 2012-12-16 14:06:00 <sipa> but to do ECDSA you need EC multiplications as well
300 2012-12-16 14:08:06 <MC-Eeepc> if the parallelisation can be done properly wouldnt it be rather fast
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302 2012-12-16 14:10:49 <sipa> very rough estimate: if a GPU can do 350 MH/s, it'd do 100k signature verifications per second
303 2012-12-16 14:11:13 <MC-Eeepc> that sounds fast
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307 2012-12-16 14:12:50 <sipa> i may be a factor 2-3 off, but yes
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359 2012-12-16 17:33:32 <Scrat> how well can bitcoind handle thousands of accounts?
360 2012-12-16 17:55:42 <rdymac> how is the 0.8 going? Can it be downloaded to test?
361 2012-12-16 17:55:51 <rdymac> is there binary for mac already?
362 2012-12-16 17:56:10 <sipa> Scrat: not very well
363 2012-12-16 17:56:37 <sipa> rdymac: gavin has certainly built mac binaries already for testing, but none are publically available afaik
364 2012-12-16 17:57:09 <rdymac> Anyway I could get one for testing?
365 2012-12-16 17:57:28 <Scrat> sipa: so is it using a linear lookup?
366 2012-12-16 17:57:40 <Scrat> or serial rather
367 2012-12-16 17:57:42 <sipa> Scrat: yup
368 2012-12-16 17:58:03 <sipa> Scrat: well, no, but some operations do require a linear scan of all wallet transactions or wallet keys
369 2012-12-16 18:03:00 <rdymac> I saw a link here a few days ago, but I missed it
370 2012-12-16 18:04:19 <sipa> https://bitcointalk.org/index.php?topic=129861.0 ?
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377 2012-12-16 18:42:54 <sipa> gmaxwell: btw... a blktree database corrupted such that -reindex doesn't repair it? wth?
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396 2012-12-16 20:15:05 <winemaker> hello
397 2012-12-16 20:15:34 <winemaker> what software / lib's etc do i need to compile bitcoin-qt - i'm using win8
398 2012-12-16 20:16:31 <Luke-Jr> winemaker: I think there's a total of one person who compiles Bitcoin-Qt on Windows anymore (Diapolo), and he's not here right now.
399 2012-12-16 20:16:42 <Luke-Jr> winemaker: it *should* be documented in the doc/ directory though
400 2012-12-16 20:17:00 <Luke-Jr> winemaker: note that official Windows releases are compiled on Ubuntu
401 2012-12-16 20:17:27 <winemaker> i'm so sorry but win8 fucked up my ubuntu and i was to lazy to reinstall grub
402 2012-12-16 20:17:56 <sipa> nothing to be sorry about, but it just means that it's hard to help you
403 2012-12-16 20:18:10 <Luke-Jr> ^
404 2012-12-16 20:18:25 <sipa> as most developers are linux users, and windows releases are built on linux too
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410 2012-12-16 20:46:21 <etotheipi_> is it true the genesis transaction can't be spent?
411 2012-12-16 20:46:25 <etotheipi_> What is preventing it?
412 2012-12-16 20:47:01 <sipa> the fact that it is initialized without being added to the transaction database by every version of the reference client
413 2012-12-16 20:47:19 <sipa> maybe a bug, maybe intentionally
414 2012-12-16 20:48:25 <etotheipi_> oh, it would be seen as invalid if a spend showed up in the blockchain (and thus wouldn't really be in the blockchain that most people are following)
415 2012-12-16 20:48:54 <sipa> yes
416 2012-12-16 20:49:17 <etotheipi_> then how does the client verify the genesis hash?  or does it not?
417 2012-12-16 20:49:40 <sipa> it doesn't
418 2012-12-16 20:49:48 <sipa> it's hardcoded
419 2012-12-16 20:49:56 <gmaxwell> The genesis block is hardcoded, but thats orthorgonal to it being unspendable.
420 2012-12-16 20:50:09 <etotheipi_> got it
421 2012-12-16 20:50:12 <gmaxwell> E.g. it would be perfectly possible to validate it but not insert it into the index.
422 2012-12-16 20:50:27 <sipa> or the other way around
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495 2012-12-16 23:06:42 <nus> ehm, the bitcoint.it ssl certificate has expired
496 2012-12-16 23:08:51 <sipa> ;;later tell MagicalTux bitcoin.it's SSL certificate has expired
497 2012-12-16 23:08:51 <gribble> The operation succeeded.
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