Difference between pages "Talk:Switching gcc" and "Litecoin Mining for Funtoo"

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== conceptual tweaks ==
+
Litecoin mining is a fun and easy way that you can help support the Funtoo Linux project. Litecoin is a virtual cryptographic currency that is generated using CPUs and video card GPU computational power, and can be converted into a traditional currency like US dollars.
  
I made some changes here because our kernel ebuilds that require 4.4.5 use it automatically and do not require gcc-config steps. But I wanted to preserve the information you added. I also suggested that people use <tt>gcc-4.4.5</tt> directly rather than use <tt>gcc-config</tt> if possible, since this is a local change. -Daniel
+
== How does Litecoin Relate to Funtoo? ==
  
Hi Daniel, thank you for your tweaks! I added this article, since I emerged the current rhel6-stable Kernel (2.6.32-042stab059.7) and ran into the described problems. Also, I did this without "binary" USE-Flag, since (although this isn't recommended) we change the Kernel's config by activating /proc/config.gz (if not activated by default) because of our factory's policy. Using genkernel manually is the more comfortable way for us.
+
Part of Funtoo is having fun, and part of having fun is being creative, and exploring new ideas and concepts, and not being limited by the expectations of others. These concepts include technology, but also include new community concepts and approaches for supporting a community. Distributed support via CPU and GPU power is certainly a novel way of supporting an open source project, and because of this it is a perfect fit for Funtoo. In many ways, the resource challenges faced by open source projects are more complex than the technical challenges, and deserve to be taken seriously. By exploring the use of Litecoin, we are exploring an innovative way to fund the project.
I ran into the described problems (which you removed from Revision of 11:32, 14 August 2012) only Oleg could give me the hint for GCC 4.4.5 and we realized that this info about how to switch gcc was still missing in the wiki. When emerging the kernels without binary USE-Flag, gcc v4.4.5 is emerged as dependency of that kernel, but sorry: It seems as if gcc is *not* used by genkernel automatically. So, even though the binary USE-Flag is recommended, it doesn't read as a must in the docs (and thanks to genkernel it isn't). I think that we cannot assume the gcc-4.4.5 is always "used automatically". Building a kernel with genkernel seems like a valid alternative to me; but in this case you need these informations.
+
You further wrote that "gcc-config" is a local change and so not a perfect solution: That's why I added the "fancyimportant" - warning :P
+
Do not get me wrong: I *really* appreciate your help! But don't you think these points / alternate way has to be taken in account too? -Marc (Judge/Whitewolf Fox)
+
  
That should have never happened, because all openvz kernels using gcc-4.4.5 patch, so you even shouldn't know about gcc-config. Somehow, when testing new 059.7 ebuild, i missed the patch, my fault. Anyway gcc-config is forked in funtoo and it's good to have a wiki page.
+
=== What are Funtoo Litecoin Funds Used For? ===
 +
 
 +
These funds will be used to support Funtoo's operating budget, covering hosting and server equipment expenses and other expenses such as hardware purchases for supporting ongoing development for various developers.
 +
 
 +
== Litecoin Pools ==
 +
 
 +
 
 +
Typically, Litecoins are mined by pools of computers, and funtoo is part of the following pooled litecoin mining efforts:
 +
 
 +
{| style="background-color:#ffffcc;" cellpadding="10" cellspacing="0" border="1"
 +
! pool
 +
! host
 +
! port
 +
! user
 +
! password
 +
! stats
 +
! review
 +
|-
 +
| Coinotron
 +
| <tt>stratum+tcp://coinotron.com:3334</tt>
 +
| <tt>3334</tt>
 +
| <tt>funtoo.public</tt>
 +
| <tt>p</tt>
 +
|
 +
| We've found this pool to be very efficient.
 +
|-
 +
| Burnside's Litecoin Mining Pool
 +
| <tt>ltc.kattare.com</tt>
 +
| <tt>9332</tt>
 +
| <tt>funtoo.public</tt>
 +
| <tt>p</tt>
 +
| [http://ltc.kattare.com/stats.php stats]
 +
| very good PPNLS pool
 +
|-
 +
| OzCoin
 +
| <tt>newlc.ozco.in</tt>
 +
| <tt>9332</tt>
 +
| <tt>funtoo.public</tt>
 +
| <tt>p</tt>
 +
| [https://lc.ozcoin.net/content/overview ozcoin overview]
 +
| very good PPS pool
 +
|}
 +
 
 +
There are lots of different ways to mine Litecoins. You can use any of our pools above. You can also use your CPU or your graphics card. To see what different types of hardware can do, see the [https://github.com/litecoin-project/litecoin/wiki/Mining-hardware-comparison Litecoin Mining Hardware Comparison] page. Note that many of these systems are overclocked so make note of the CPU and memory frequencies listed here.
 +
 
 +
== "Got Litecoins Already" Method ==
 +
 
 +
If you already have Litecoins that you want to donate to Funtoo Linux, you can send them to <tt>LgtcMbY5JYTQAGzdfJ9U83CPhspNkbJzym</tt>. Thanks!
 +
 
 +
Here's how to do it with litecoind:
 +
 
 +
<console>
 +
# ##i##litecoind sendtoaddress LgtcMbY5JYTQAGzdfJ9U83CPhspNkbJzym 50
 +
</console>
 +
 
 +
Be sure to let Daniel know that you sent some coin so that you can receive proper respect :)
 +
 
 +
== CPU Mining ==
 +
 
 +
Here's how to get started and convert your idle CPU power into a contribution to the Funtoo Linux project.
 +
 
 +
The "miner" is the program that performs the computation to generate litecoins. It receives blocks from a server, which it performs computations on. Miners are designed to run continually in the background, where they use up idle CPU only, and will not impact the speed of your system. A significant contribution to Funtoo Linux is only realized when miners are run continually for days and weeks -- so running a miner for an hour or so is typically not effective.
 +
 
 +
=== Installation using Portage ===
 +
 
 +
This method will use CFLAGS from /etc/portage/make.conf. Note that <tt>-O2</tt> seems to work much better than <tt>-O3</tt>.
 +
 
 +
<console>
 +
# ##i##emerge pooler-cpuminer
 +
</console>
 +
 
 +
=== Set up go.sh ===
 +
 
 +
Create the following <tt>go.sh</tt> script to start the miner:
 +
 
 +
<pre>
 +
#!/bin/bash
 +
threads=$(grep -c "^processor" /proc/cpuinfo)
 +
while true;
 +
do
 +
  minerd --algo scrypt -s 45 --retry-pause 5 --threads $threads --url http://ltc.kattare.com:9332 --userpass funtoo.public:p
 +
done
 +
</pre>
 +
 
 +
Make it executable:
 +
 
 +
<console>
 +
# ##i##chmod +x go.sh
 +
</console>
 +
 
 +
=== Run go.sh ===
 +
 
 +
Run <tt>go.sh</tt> to start the miner.
 +
 
 +
<console>
 +
# ##i##./go.sh
 +
</console>
 +
 
 +
The cpuminer will only use idle CPU and will not slow down your system. Modern systems will generate somewhere from 15 to 60 KHash/sec total, which will result in $10 to Funtoo Linux per month for a Core i7 system at current exchange rates, when run continually.
 +
 
 +
Keep those miners running and thanks for supporting Funtoo Linux!
 +
 
 +
== GPU Mining ==
 +
 
 +
 
 +
'''cgminer stopped supporting GPU/Scrypt mining in 3.8 series'''. 3.7.2 version is stable and recommended for gpu mining.
 +
 
 +
 
 +
Some of the more hardcore individuals in the Funtoo community may want to use their graphics processor to mine litecoins. Modern graphics cards, particularly AMD (ATI) cards, can offer hashrates well above 100Khash/sec, even above 400Khash/sec for some cards. Daniel Robbins has a few Radeon HD 6950's that can generate in excess of 400Khash/sec ''each''.
 +
 
 +
AMD (ATI) cards tend to work much better than NVIDIA for litecoin mining. Here's how to do GPU mining:
 +
 
 +
=== Prerequisites ===
 +
 
 +
First, X will need to be installed, and you will need to ensure all your video cards are defined in <tt>/etc/X11/xorg.conf</tt>. For AMD cards, ati-drivers 13.1 appears to work well. Ensure that full hardware acceleration is working and that <tt>ati</tt> OpenGL and <tt>amd</tt> OpenCL are selected via <tt>eselect</tt>. (This is probably how things are set up if you simply emerged ati-drivers.)
 +
 
 +
=== Install cgminer ===
 +
 
 +
First, enable the <tt>scrypt</tt> USE variable (important!). Now, emerge cgminer:
 +
 
 +
<console>
 +
# ##i##USE="scrypt" emerge =net-misc/cgminer-3.7.2
 +
</console>
 +
 
 +
=== Create cgminer script ===
 +
 
 +
Create a <tt>go.sh</tt> script that looks like this:
 +
 
 +
<pre>
 +
#!/bin/bash
 +
export GPU_MAX_ALLOC_PERCENT=100
 +
export GPU_USE_SYNC_OBJECTS=1
 +
export DISPLAY=:0
 +
cgminer \
 +
-o http://newlc.ozco.in:9332/ -u funtoo.public -p p \
 +
-o http://ltc.kattare.com:9332/ -u funtoo.public -p p \
 +
--intensity 17 \
 +
--scrypt \
 +
--shaders 1536 --thread-concurrency 8000 -g 1 --worksize 256 \
 +
--auto-fan --temp-target 80
 +
</pre>
 +
 
 +
This script will start cgminer to connect to newlc.ozco.in, but will automatically fall back to the kattare pool if ozco.in is down. Intensity ranges from 1-20, with higher settings generally offering better hashrates. But if you get too close to 20, you will notice a slow down in interactive performance when using the X server. ssh performance will be unaffected.
 +
 
 +
Be sure to properly set the number of shaders on your card -- 1536 is for an unlocked Radeon HD 6950. Consult [https://github.com/ckolivas/cgminer/blob/master/SCRYPT-README SCRYPT-README] (look for the <tt>--shaders</tt> description) to view the correct shaders to use for your card.
 +
 
 +
=== Start Mining ===
 +
 
 +
Now make it executable, '''make sure X is running''', and start mining:
 +
 
 +
<console>
 +
# ##i##chmod +x go.sh
 +
# ##i##./go.sh
 +
</console>
 +
 
 +
There are other cool things you can do with cgminer, such as overclocking your video card and ramping up the intensity to at or near 20 to dramatically increase hashrates. Happy mining, and if you are mining for Funtoo, thanks :)

Revision as of 04:12, 28 November 2013

Litecoin mining is a fun and easy way that you can help support the Funtoo Linux project. Litecoin is a virtual cryptographic currency that is generated using CPUs and video card GPU computational power, and can be converted into a traditional currency like US dollars.

How does Litecoin Relate to Funtoo?

Part of Funtoo is having fun, and part of having fun is being creative, and exploring new ideas and concepts, and not being limited by the expectations of others. These concepts include technology, but also include new community concepts and approaches for supporting a community. Distributed support via CPU and GPU power is certainly a novel way of supporting an open source project, and because of this it is a perfect fit for Funtoo. In many ways, the resource challenges faced by open source projects are more complex than the technical challenges, and deserve to be taken seriously. By exploring the use of Litecoin, we are exploring an innovative way to fund the project.

What are Funtoo Litecoin Funds Used For?

These funds will be used to support Funtoo's operating budget, covering hosting and server equipment expenses and other expenses such as hardware purchases for supporting ongoing development for various developers.

Litecoin Pools

Typically, Litecoins are mined by pools of computers, and funtoo is part of the following pooled litecoin mining efforts:

pool host port user password stats review
Coinotron stratum+tcp://coinotron.com:3334 3334 funtoo.public p We've found this pool to be very efficient.
Burnside's Litecoin Mining Pool ltc.kattare.com 9332 funtoo.public p stats very good PPNLS pool
OzCoin newlc.ozco.in 9332 funtoo.public p ozcoin overview very good PPS pool

There are lots of different ways to mine Litecoins. You can use any of our pools above. You can also use your CPU or your graphics card. To see what different types of hardware can do, see the Litecoin Mining Hardware Comparison page. Note that many of these systems are overclocked so make note of the CPU and memory frequencies listed here.

"Got Litecoins Already" Method

If you already have Litecoins that you want to donate to Funtoo Linux, you can send them to LgtcMbY5JYTQAGzdfJ9U83CPhspNkbJzym. Thanks!

Here's how to do it with litecoind:

# litecoind sendtoaddress LgtcMbY5JYTQAGzdfJ9U83CPhspNkbJzym 50 

Be sure to let Daniel know that you sent some coin so that you can receive proper respect :)

CPU Mining

Here's how to get started and convert your idle CPU power into a contribution to the Funtoo Linux project.

The "miner" is the program that performs the computation to generate litecoins. It receives blocks from a server, which it performs computations on. Miners are designed to run continually in the background, where they use up idle CPU only, and will not impact the speed of your system. A significant contribution to Funtoo Linux is only realized when miners are run continually for days and weeks -- so running a miner for an hour or so is typically not effective.

Installation using Portage

This method will use CFLAGS from /etc/portage/make.conf. Note that -O2 seems to work much better than -O3.

# emerge pooler-cpuminer

Set up go.sh

Create the following go.sh script to start the miner:

#!/bin/bash
threads=$(grep -c "^processor" /proc/cpuinfo)
while true;
do
  minerd --algo scrypt -s 45 --retry-pause 5 --threads $threads --url http://ltc.kattare.com:9332 --userpass funtoo.public:p
done

Make it executable:

# chmod +x go.sh

Run go.sh

Run go.sh to start the miner.

# ./go.sh

The cpuminer will only use idle CPU and will not slow down your system. Modern systems will generate somewhere from 15 to 60 KHash/sec total, which will result in $10 to Funtoo Linux per month for a Core i7 system at current exchange rates, when run continually.

Keep those miners running and thanks for supporting Funtoo Linux!

GPU Mining

cgminer stopped supporting GPU/Scrypt mining in 3.8 series. 3.7.2 version is stable and recommended for gpu mining.


Some of the more hardcore individuals in the Funtoo community may want to use their graphics processor to mine litecoins. Modern graphics cards, particularly AMD (ATI) cards, can offer hashrates well above 100Khash/sec, even above 400Khash/sec for some cards. Daniel Robbins has a few Radeon HD 6950's that can generate in excess of 400Khash/sec each.

AMD (ATI) cards tend to work much better than NVIDIA for litecoin mining. Here's how to do GPU mining:

Prerequisites

First, X will need to be installed, and you will need to ensure all your video cards are defined in /etc/X11/xorg.conf. For AMD cards, ati-drivers 13.1 appears to work well. Ensure that full hardware acceleration is working and that ati OpenGL and amd OpenCL are selected via eselect. (This is probably how things are set up if you simply emerged ati-drivers.)

Install cgminer

First, enable the scrypt USE variable (important!). Now, emerge cgminer:

# USE="scrypt" emerge =net-misc/cgminer-3.7.2

Create cgminer script

Create a go.sh script that looks like this:

#!/bin/bash
export GPU_MAX_ALLOC_PERCENT=100
export GPU_USE_SYNC_OBJECTS=1
export DISPLAY=:0
cgminer \
-o http://newlc.ozco.in:9332/ -u funtoo.public -p p \
-o http://ltc.kattare.com:9332/ -u funtoo.public -p p \
--intensity 17 \
--scrypt \
--shaders 1536 --thread-concurrency 8000 -g 1 --worksize 256 \
--auto-fan --temp-target 80 

This script will start cgminer to connect to newlc.ozco.in, but will automatically fall back to the kattare pool if ozco.in is down. Intensity ranges from 1-20, with higher settings generally offering better hashrates. But if you get too close to 20, you will notice a slow down in interactive performance when using the X server. ssh performance will be unaffected.

Be sure to properly set the number of shaders on your card -- 1536 is for an unlocked Radeon HD 6950. Consult SCRYPT-README (look for the --shaders description) to view the correct shaders to use for your card.

Start Mining

Now make it executable, make sure X is running, and start mining:

# chmod +x go.sh
# ./go.sh

There are other cool things you can do with cgminer, such as overclocking your video card and ramping up the intensity to at or near 20 to dramatically increase hashrates. Happy mining, and if you are mining for Funtoo, thanks :)