Re: [Rd] Does anybody successfully built latest R on AIX 5.3?

From: Ei-ji Nakama <nakama_at_ki.rim.or.jp>
Date: Mon, 20 Jun 2011 12:24:21 +0900

Hi,

> This is strange, we are hoping to improve R performance through high clock speed Power CPU(4.0 GHz above),
> Now I think we should take more considerations, RAM is also cheaper for X86 than Power :)

power is no good CPU.

$ lsdev -C | grep proc

proc0      Available 00-00    Processor
proc2      Available 00-02    Processor
$ lsattr -El proc0
frequency   4204000000     Processor Speed       False
smt_enabled true           Processor SMT enabled False
smt_threads 2              Processor SMT threads False
state       enable         Processor state       False
type        PowerPC_POWER6 Processor type        False
$ lsattr -El proc2
frequency   4204000000     Processor Speed       False
smt_enabled true           Processor SMT enabled False
smt_threads 2              Processor SMT threads False
state       enable         Processor state       False
type        PowerPC_POWER6 Processor type        False

As a result of DGEMM by GotoBLAS(http://prs.ism.ac.jp/~nakama/SurviveGotoBLAS2). $ GOTO_NUM_THREADS=1 ./bm 2000

   12.954 GFLOPS (N x N : N=2000 1.23517sec)
   12.719 GFLOPS (N x T : N=2000 1.25796sec)
   13.118 GFLOPS (T x N : N=2000 1.21965sec)
   12.726 GFLOPS (T x T : N=2000 1.25732sec)
$ GOTO_NUM_THREADS=2 ./bm 2000
   25.259 GFLOPS (N x N : N=2000 0.633444sec)
   24.050 GFLOPS (N x T : N=2000 0.665272sec)
   25.710 GFLOPS (T x N : N=2000 0.622316sec)
   24.075 GFLOPS (T x T : N=2000 0.664595sec)
$ GOTO_NUM_THREADS=4 ./bm 2000
   21.311 GFLOPS (N x N : N=2000 0.750802sec)
   25.778 GFLOPS (N x T : N=2000 0.620694sec)
   26.398 GFLOPS (T x N : N=2000 0.60611sec)
   25.826 GFLOPS (T x T : N=2000 0.619536sec)

It's fast with the structure (L2 shared cache) of the CPU to 2CPU.

Best Regards,

--
EI-JI Nakama  <nakama (a) ki.rim.or.jp>
"\u4e2d\u9593\u6804\u6cbb"  <nakama (a) ki.rim.or.jp>

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Received on Mon 20 Jun 2011 - 03:30:58 GMT

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