[hashcash] libfastmint, makefile & how to integrate (Re: Re: status of hashcash version 1?)
- From: Adam Back <adam@xxxxxxxxxxxxxxx>
- To: hashcash@xxxxxxxxxxxxx
- Date: Tue, 3 Aug 2004 02:33:07 -0400
As a convenience I put the makefile I modified and the last change
from Jonathan (I think, confirm the below output corresponds to last) in:
http://www.hashcash.org/source/current/hashcash-1.00/
(obviously you'll have to do something to that make file as it is P4
specific).
output (on p4 3.06Ghz).
Rate Name (* machine default)
1715641 ANSI Compact 1-pipe
1639391 ANSI Standard 1-pipe
958085 ANSI Ultra-Compact 1-pipe
2379761 ANSI Compact 2-pipe
2078101 ANSI Standard 2-pipe
--- PowerPC Altivec Standard 1x4-pipe (Not available on this machine)
--- PowerPC Altivec Compact 2x4-pipe (Not available on this machine)
--- PowerPC Altivec Standard 2x4-pipe (Not available on this machine)
3278782 AMD64/x86 MMX Compact 1x2-pipe
4098477 AMD64/x86 MMX Standard 1x2-pipe *
btw What would I have to do to call libfastmint when integrating. I
took a look just now and the test seems hardcoded to :
static const char *test_string =
"1:20:040404:foo@xxxxxxxx::0123456789a\bcdef:000000000";
static const int test_tail = 52; /* must be less than 56 */
static const int bit_stats[] = { 8, 10, 16, 20, 22, 24, 26, 28, 30, 0 };
which is then used to fill a char block[SHA1_INPUT_BYTES] = {0}; and
then the mint functions are called on that block:
/* set up SHA-1 block */
strncpy(block, test_string, SHA1_INPUT_BYTES);
block[test_tail] = 0x80;
memset(block+test_tail+1, 0, 59-test_tail);
PUT_WORD(block+60, test_tail << 3);
which looks like the SHA1 padding setup. What would the code look
like to call this with arbitrary email addresses and extensions?
Adam
On Tue, Aug 03, 2004 at 05:20:50AM +0100, Jonathan Morton wrote:
> >Hubert> I have access to an Alpha that I can test out. What do I need
> >Hubert> to do?
> >
> >hy3chan@alpha0:~/hashcash-1.00$ ./fastmint_benchtest
> > Rate Name (* machine default)
> > 74870 ANSI Compact 1-pipe
> > 70191 ANSI Standard 1-pipe *
> > 42353 ANSI Compact 2-pipe
> > 30967 ANSI Standard 2-pipe
> > --- PowerPC Altivec Standard 1x4-pipe (Not available on this
> >machine)
> >Best minter: ANSI Compact 1-pipe (74870 hashes/sec)
> >
> >This is on an Alpha EV4 (21064 -- I think the earliest type of Alpha),
> >approx. 200 MHz.
>
> Hmmm, you don't seem to have the latest version there. Take a look at
> some of my more recent posts, you should find an archive attached to
> one of them, which you can overwrite part of the v1-rc with. You'll
> also need to add stuff to the Makefile so that it builds properly,
> because there are additional cores with their own source and object
> files.
>
> Still, that seems to work OK (the benchmark includes a sanity check on
> the result), even if it isn't particularly fast. You might want to try
> using different compiler options and/or a better compiler -
> register-rich architectures should generally be faster with the
> "Standard" cores, not the "Compact".
>
> --------------------------------------------------------------
> from: Jonathan "Chromatix" Morton
> mail: chromi@xxxxxxxxxxxxxxxxxxxxx
> website: http://www.chromatix.uklinux.net/
> tagline: The key to knowledge is not to rely on people to teach you it.
>
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