What is a bad chain? Could you elaborate more on why checkpoints are bad? There is no way for the software to automatically know if one chain is better than another except by the greatest proof-of-work.  In the design it was necessary for it to switch to a longer chain […]

SVN rev 139 does a basic check of the block chain after loading. With this we wouldn’t have needed to delete blk*.dat, it would have automatically done a reorg back to the fork.  There wasn’t time to do a careful implementation of this at the time. It might take longer […]

Quote from: satoshi on August 16, 2010, 15:25:54 It would probably be possible to initiate an AddToBlockIndex or Reorganize after the check, but it would require a lot more careful attention. I probably should break out part of AddToBlockIndex that sets the new best block. I’ll probably end up doing […]

I’d like to reduce the number of blocks displayed in the status bar by 1.   When you first load the program, it’ll display 0 blocks instead of 1: “0 connections    0 blocks     0 transactions” It’s always been “nBestHeight + 1” because it’s counting the genesis block.  Technically, yes, […]

I’d like to reduce the number of blocks displayed in the status bar by 1.   When you first load the program, it’ll display 0 blocks instead of 1: “0 connections    0 blocks     0 transactions” It’s always been “nBestHeight + 1” because it’s counting the genesis block.  Technically, yes, […]

I’ve written a patch to help automatically validate cached blocks after validation fixes such as the one that was pushed out today. You can find it at http://fushizen.net/~bd/blockverify.patch or http://github.com/bdonlan/bitcoin/commit/b205251959448ca99123f2bc95b088bf06d4ef3b Upon first run with this patch, all blocks will be verified, and any invalid blocks, as well as blocks orphaned […]

On a Core 2 Duo T7200, the default code gives about 1.8 Mhash/s, and 4way is slower at 1.0 Mhash/s. It has 4 MB of L2 cache, so it is probably not a question of cache size, as suggested at some point. Unfortunately, the code (from svn) no longer compiles […]

Interesting.. fascinating to watch this work its way through the bowels of the system. It was block 73746 that I generated. CTxOut(nValue=50.00000000, scriptPubKey=0x8DDD5C7DADB2D43AC5F186) 08/12/10 02:35 generated 50.00 And I sent 49.00 of it to 19Nzg21hQQDAY5GTdTTuUVPA4MaE7AusXz (using the broken chain) Now I’m waiting for that node to figure out it was […]

Quote from: jgarzik on August 16, 2010, 03:35:28 Code: cpu family : 6 model : 26 model name : Genuine Intel(R) CPU 000 @ 3.20GHz stepping : 4 cpu family 6 model 26 stepping 4 is an Intel Core i7. That’s a 23% speedup with -4way, 63% total speedup with […]

Quote from: Vasiliev on August 16, 2010, 03:17:07 try -march=amdfam10 That works. That’s strange…  are we sure that’s the same thing?  tcatm, try amdfam10 and make sure you get the same speed measurement. Related posts: Re: tcatm’s 4-way SSE2 for Linux 32/64-bit 0.3.9 rc2 Quote from: tcatm on August 16, […]