From a2e871270538bb187865c9f00d8aa8f4e817e131 Mon Sep 17 00:00:00 2001
From: Pjotr Prins
Date: Sat, 14 Oct 2017 06:12:41 +0000
Subject: Note on OpenBlas build

---
 INSTALL.md | 19 +++++++------------
 1 file changed, 7 insertions(+), 12 deletions(-)

(limited to 'INSTALL.md')

diff --git a/INSTALL.md b/INSTALL.md
index dc03a71..19ae290 100644
--- a/INSTALL.md
+++ b/INSTALL.md
@@ -106,19 +106,19 @@ or
 ### OpenBlas
 
 Linking against a built-from-source OpenBlas is a first optimization
-step because it will optimize code for the local architecture. When
-you check the output .log file of GEMMA after a run, it will tell you
-how the linked-in OpenBlas was compiled.
+step because it will optimize code for the local architecture (on my
+workstation it easily doubles speed). When you check the output .log
+file of GEMMA after a run, it will tell you how the linked-in OpenBlas
+was compiled.
 
 To link a new version, compile OpenBlas as per
 [instructions](http://www.openblas.net/).  You can start with the default:
 
     make -j 4
 
-or play with the switches (note NO_AFFINITY may be needed in a future
-version)
+or play with the switches
 
-    make USE_THREAD=1 NUM_THREADS=16 NO_AFFINITY=1 -j 4
+    make USE_THREAD=1 NUM_THREADS=16 -j 4
 
 rendering for example:
 
@@ -131,7 +131,6 @@ rendering for example:
 
         To install the library, you can run "make PREFIX=/path/to/your/installation install".
 
-
 This generates a static library which you can link using the full path
 with using the GEMMA Makefile:
 
@@ -139,8 +138,4 @@ with using the GEMMA Makefile:
 
     make EIGEN_INCLUDE_PATH=~/.guix-profile/include/eigen3 LIBS="~/tmp/OpenBLAS/libopenblas_haswellp-r0.3.0.dev.a -lgsl -lgslcblas -pthread -lz  -llapack" WITH_OPENBLAS=1 -j 4 unittests
 
-Batch of 1000:
-
-real    4m24.923s
-user    4m33.576s
-sys     0m11.004s
+NOTE: we should make this easier.
-- 
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