From: leonardo.bianconi@...
Date: 2014-06-30T15:44:55+00:00
Subject: [ruby-core:63437] [ruby-trunk - Feature #9997] [Open] Specifying non volatile registers for increase performence in ppc64

Issue #9997 has been reported by Leonardo Bianconi.

----------------------------------------
Feature #9997: Specifying non volatile registers for increase performence in ppc64
https://bugs.ruby-lang.org/issues/9997

* Author: Leonardo Bianconi
* Status: Open
* Priority: Normal
* Assignee: Leonardo Bianconi
* Category: core
* Target version: current: 2.2.0
----------------------------------------
To increase performance on ppc64 machines, the registers 14 and 15 were specified for the architecture, just like for x86_64 machines.

I've executed some benchmarks, see below:

bm_loop_for.rb
Before              After
real	0m2.524s    real	0m2.781s
user	0m2.520s    user	0m2.777s
sys	0m0.004s    sys         0m0.004s

bm_loop_whileloop.rb
Before              After
real    0m1.142s    real        0m1.267s
user    0m1.138s    user        0m1.263s
sys     0m0.004s    sys         0m0.004s

bm_so_array.rb
Before              After
real    0m1.556s    real        0m1.832s
user    0m1.552s    user        0m1.828s
sys     0m0.004s    sys         0m0.004s

bm_so_matrix.rb
Before              After
real    0m1.070s    real        0m1.107s
user    0m1.066s    user        0m1.104s
sys     0m0.004s    sys         0m0.004s

---Files--------------------------------
enhac_ppc64.patch (781 Bytes)


-- 
https://bugs.ruby-lang.org/