By default, my pool sends new work once every 60 seconds.  That is not significantly different than how often many miners get new work (especially when nTime rolling is involved).

They payload of new work is ~1 KB.  It's sent over an always-open asynchronous TCP connection.  No HTTP overhead, no opening new connections either.  This is roughly equivalent to a single getwork today.  That 1 KB is enough to include ~1,000 transactions (which only requires 10 merklebranches to be sent), and provides enough work 18 Exahash/s.  Add an extra 65 bytes to the work push to double that to 1,025-2,047 transactions.  Another 65 for 2,048-4,096.  As you can see, this means that even at astronomical network size where a block would contain hundreds of thousands of transactions, the payload for the mining protocol will never exceed 2 KB.

Work submissions take only a few bytes.  The new protocol drastically reduces bandwith to the point that a 56k modem provides enough bandwidth to run a mining farm more than 1 billion times the size of the current network.

Additionally, the 18 Exahash uses a local ExtraNonce adjustment size of 4 bytes.  That can be increased to 8 bytes quite easily (the protocol defines the ExtraNonce size as variable, and provided by the pool server).  If the ExtraNonce size was increased to 8 bytes, you can run 4.2 billion times more work per push, and the only increase in bandwidth is it will require 8 more bytes to submit a share to the server.

I'm having a problem trying out scrypt on cgminer.  I seem to have got my settings OK for the most part other than a little performance tweaking, but the main problem I ran into was this. 
CGMiner is reporting that my 5830 card is currently hashing at 150 Kh/s but on litecoinpool.org it was only reporting about 10 Kh/s.  It doesn't seem to be an issue with rejects or HW errors as I am getting very few rejects and no HW errors. 
So I thought maybe it was something with litecoin pool.  So I setup a local P2Pool server and pointed the rig to that, but I am still getting a very similar issue.  P2Pool is only reporting me hashing at 25509H/s.  I read through a lot of the posts in this thread and the CGMiner Scrypt thread, but could not find anyone having a similar issue.  Anyone have any ideas what my problem might be?

The "download all files here" link is not working on the first page. Ready to give CGMiner a try but no download

OK, my current git source has these 3 now also ... if you compile it, it will now say 2.7.5h
The change: viewing and setting queue, scantime and expiry via the API
... any prompting?

When I get one to work out how to access them
Someone offered to send me one ... soon I hope

I will then make a standalone CM driver that deals with some/all of the extra CM only stuff.

For basic support - useful - for ongoing proper support - not much use.
I've already done the basic support, for free, without having a CM1.

CM1's mine (with the Icarus style bitstreams) and can even get the right timing for the different configurations and different FPGA setups (single or pairs - but the code will allow up to 8 )
Oddly - I did all that without even having access to a CM1 - it was all rather logical how it should work so I wrote the code to make it work.
I think it was the idea of Lancelot that made me want to do it - but I don't have one of them either
But even Lancelot mines with the Icarus code.

'When' I get a CM1 I'll then go to the trouble (as I said above) of writing a specific driver for it based on the Icarus code (they will most likely share code) ... until then, it works, it mines, it's good enough.
(and no I'm not looking for ways to spend my free time on something like that without a CM1 )

... that's the polite version

That's a ckolivas question.
I've never gone near that part of the code - and he's been trying to fix it for a while ...
But ... 4 vs 5 - um - not really that big a deal?

yeah, but I REALLY would want it to be 7 when I'm away from the computer instead
since I'm running p2pool it's on a single thread so the difference in performance is ~15mhash (5%) between 4 and 7

and I can't even tell the difference when just typing right now, but if I watch a video on 7 everything will be sluggish

What card are you using? I got a 7970 on my main computer, and even with I:9, I can watch movies with no issues.

I have mined for a while and I just downloaded and tried CGMiner for the first time in more than a year.  WOW.  That's all I can say.  Ok, I'll say more... amazing, holy cow, omg, try this thing.  Fast... informative... I hear my fans spinning up....  two seconds to set up, I forgot the port number, added port number, they didn't ask me for port number, I digress ... presto.

Impressive, keep up the good work.  Now I try the linux port...

Not good news.  I get a segmentation fault.

I am running  2.6.18-308.13.1.el5 #1 SMP fully updated
Downloaded and installed AMD SDK 2.7 (wasn't working with 2.4 either)
I get the same core dump that I read about earlier in this thread:


 [2012-09-14 11:52:01] Started cgminer 2.7.5
 [2012-09-14 11:52:01] Loaded configuration file miner.conf
 [2012-09-14 11:52:01] CL Platform 0 vendor: Advanced Micro Devices, Inc.
 [2012-09-14 11:52:01] CL Platform 0 name: AMD Accelerated Parallel Processing
 [2012-09-14 11:52:01] CL Platform 0 version: OpenCL 1.1 AMD-APP-SDK-v2.4 (595.10)
 [2012-09-14 11:52:01] Platform 0 devices: 4
 [2012-09-14 11:52:01]  0       Barts
 [2012-09-14 11:52:01]  1       Barts
 [2012-09-14 11:52:01]  2       Barts
 [2012-09-14 11:52:01]  3       Barts
 [2012-09-14 11:52:01] Probing for an alive pool
 [2012-09-14 11:52:01] Testing pool http://pit.deepbit.net:8332
 [2012-09-14 11:52:11] Pool 0 http://pit.deepbit.net:8332 active
 [2012-09-14 11:52:11] Init GPU thread 0 GPU 0 virtual GPU 0
 [2012-09-14 11:52:11] CL Platform vendor: Advanced Micro Devices, Inc.
 [2012-09-14 11:52:11] CL Platform name: AMD Accelerated Parallel Processing
 [2012-09-14 11:52:11] CL Platform version: OpenCL 1.1 AMD-APP-SDK-v2.4 (595.10)
 [2012-09-14 11:52:11] List of devices:
 [2012-09-14 11:52:11]  0       Barts
 [2012-09-14 11:52:11]  1       Barts
 [2012-09-14 11:52:11]  2       Barts
 [2012-09-14 11:52:11]  3       Barts
 [2012-09-14 11:52:11] Selected 0: Barts
 [2012-09-14 11:52:11] Long-polling activated for http://pit.deepbit.net:8332/listenChannelSegmentation fault

This also fails with a core dump:   cgminer -k poclbm --benchmark

I did not see a solution in the thread but will continue to look...

fwiw:

python opencl.py
[12:17:35] Python OpenCL Info v0.1
[12:17:35] Python Version: 2.7.1 64bit
[12:17:35] PyOpenCL Path:usr/local/lib/python2.7/site-packages/pyopencl-2012.1-py2.7-linux-x86_64.egg/pyopencl
[12:17:35] Boost Python Version: Not Found
[12:17:35] PyOpenCL Version: 2012.1
[12:17:35] Listing platforms and devices:
[12:17:35]
[12:17:35] [cl:0] AMD Accelerated Parallel Processing
[12:17:35]        [cl:0:0] Barts
[12:17:35]        [cl:0:1] Barts
[12:17:35]        [cl:0:2] Barts
[12:17:35]        [cl:0:3] Barts
[12:17:35]        [cl:0:4] AMD Sempron(tm) 140 Processor
[12:17:35]
[12:17:35] This program will exit in 300 seconds...