Minimizing and correcting MPI calculations

stanford-rc · Feb 13, 2021 · cfc27b2 · cfc27b2
1 parent 3ded072
commit cfc27b2
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Showing 4 changed files with 3 additions and 34 deletions.
diff --git a/fig/finalize.png b/fig/finalize.png
diff --git a/fig/scatter-2.png b/fig/scatter-2.png
diff --git a/files/initialize-scatter-compute-gather.tex b/files/initialize-scatter-compute-gather.tex
@@ -55,7 +55,7 @@
 \newcommand{\drawarrows}{}
 }
 
-% Scatter 1
+% Scatter
 %\newcommand{\setstate}{
 %\newcommand{\countstyle}{}
 %\newcommand{\countszero}{0}
@@ -85,36 +85,6 @@
 %}
 %}
 
-% Scatter 2
-%\newcommand{\setstate}{
-%\newcommand{\countstyle}{}
-%\newcommand{\countszero}{0}
-%\newcommand{\countsone}{0}
-%\newcommand{\countstwo}{0}
-%\newcommand{\countsthree}{0}
-%\newcommand{\showpi}{}
-%\newcommand{\pistyle}{}
-%\newcommand{\pizero}{\partition}
-%\newcommand{\pione}{\partition}
-%\newcommand{\pitwo}{\partition}
-%\newcommand{\pithree}{\partition}
-%\newcommand{\showci}{}
-%\newcommand{\cistyle}{new}
-%\newcommand{\cizero}{\countszero}
-%\newcommand{\cione}{\countsone}
-%\newcommand{\citwo}{\countstwo}
-%\newcommand{\cithree}{\countsthree}
-%\newcommand{\showmypi}{\phantom}
-%\newcommand{\mypistyle}{}
-%\newcommand{\mypi}{None}
-%\newcommand{\drawarrows}{
-%  \draw[red, line, arrow, out=200, in=180] (counts00) to (countitem0);
-%  \draw[red, line, arrow, out=0, in=180] (counts01) to (countitem1);
-%  \draw[red, line, arrow, out=0, in=180] (counts02) to (countitem2);
-%  \draw[red, line, arrow, out=0, in=180] (counts03) to (countitem3);
-%}
-%}
-
 % Compute
 %\newcommand{\setstate}{
 %\newcommand{\countstyle}{}
@@ -195,7 +165,7 @@
 %\newcommand{\mypi}{3.1796875}
 %\newcommand{\drawarrows}{
 %  \draw[red, line, arrow, out=180, in=180] (counts0start) to (mypi);
-%  \draw[red, line, arrow, out=180, in=180] (nsamples0) to (mypi);
+%  \draw[red, line, arrow, out=180, in=180] (partitions0start) to (mypi);
 %}
 %}
 

diff --git a/files/pi-mpi-minimal.py b/files/pi-mpi-minimal.py
@@ -22,9 +22,8 @@ def inside_circle(total_count):
         partitions = None
         counts = None
     partition_item = comm.scatter(partitions, root=0)
-    count_item = comm.scatter(counts, root=0)
     count_item = inside_circle(partition_item)
     counts = comm.gather(count_item, root=0)
     if rank == 0:
-        my_pi = 4.0 * sum(counts) / n_samples
+        my_pi = 4.0 * sum(counts) / sum(partitions)
         print(my_pi)