Hello,

Here a rapid tests done on Power 8 Cloud (http://runabove.com, only 1$ per hour, so go test it ! ) on 176 threads :

CPUMiner, not optimised for P8

BTC/SHA256 :

below 20 threads,

88 threads => 62 MHashs/s
176 threads => 46 MHash/s



LTC/Scrypt : 

below 20 threads, 2 Khash/s per thread

88 threads   =>  105 Khash/s
176 threads =>  82.72 Khash/s


Not good...  But I think that with a specificaly designed Miner, it could be awsome, but it will not be better than ASIC...

------ 

Here all the command to do to run CPUMiner on Power8 from RA


[admin@test-p8 cpuminer-2.4]$ history
     1  sudo yum install wget git bzip2 tar make diff gcc make automake libcurl-devel.ppc libcurl-devel.ppc64 libcurl.ppc libcurl.ppc64
     2  wget http://sourceforge.net/projects/cpuminer/files/pooler-cpuminer-2.4.tar.gz
     3  tar xzf pooler-cpuminer-*.tar.gz
     4  cd cpuminer-2.4/
     5  ./configure CFLAGS="-O3"
     6  make
     7  ./minerd --url=stratum+tcp://ltc.ghash.io:3333 --userpass=xxxx --threads=88 --algo scrypt
     8  ./minerd --url=stratum+tcp://ltc.ghash.io:3333 --userpass=xxxx --threads=176 --algo scrypt
     9  ./minerd --url=stratum+tcp://uk1.ghash.io:3333 --userpass=xxxx --threads=88 --algo sha256d
   10  ./minerd --url=stratum+tcp://uk1.ghash.io:3333 --userpass=xxxx --threads=176 --algo sha256d
   11  history


Do you want me to do some other test ?


Have a nice day,
Maiko