[Assorted-commits] SF.net SVN: assorted: [352] numa-bench

[<yan...@us...>]

Revision: 352
          http://assorted.svn.sourceforge.net/assorted/?rev=352&view=rev
Author:   yangzhang
Date:     2008-02-10 10:37:27 -0800 (Sun, 10 Feb 2008)

Log Message:
-----------
added numa-bench

Added Paths:
-----------
    numa-bench/
    numa-bench/trunk/
    numa-bench/trunk/README
    numa-bench/trunk/src/
    numa-bench/trunk/src/Makefile
    numa-bench/trunk/src/avail.cc
    numa-bench/trunk/src/cache.cc
    numa-bench/trunk/src/malloc.cc
    numa-bench/trunk/src/thrash.cc

Added: numa-bench/trunk/README
===================================================================
--- numa-bench/trunk/README	                        (rev 0)
+++ numa-bench/trunk/README	2008-02-10 18:37:27 UTC (rev 352)
@@ -0,0 +1,6 @@
+This is an assortment of microbenchmarks for understanding the performance
+behavior of NUMA systems and for exploring the Linux NUMA API.
+
+Revelant materials include the [libnuma whitepaper].
+
+[libnuma whitepaper]: http://www.novell.com/collateral/4621437/4621437.pdf

Added: numa-bench/trunk/src/Makefile
===================================================================
--- numa-bench/trunk/src/Makefile	                        (rev 0)
+++ numa-bench/trunk/src/Makefile	2008-02-10 18:37:27 UTC (rev 352)
@@ -0,0 +1,15 @@
+COMMONS := $(wildcard commons/*.h)
+CXX = g++ -I. -lnuma -o $@ $^
+
+all: avail cache
+
+avail: avail.cc $(COMMONS)
+	$(CXX)
+
+cache: cache.cc $(COMMONS)
+	$(CXX)
+
+clean:
+	rm -f avail cache
+
+.PHONY: clean

Added: numa-bench/trunk/src/avail.cc
===================================================================
--- numa-bench/trunk/src/avail.cc	                        (rev 0)
+++ numa-bench/trunk/src/avail.cc	2008-02-10 18:37:27 UTC (rev 352)
@@ -0,0 +1,7 @@
+#include <numa.h>
+
+int
+main()
+{
+  return numa_available() < 0;
+}

Added: numa-bench/trunk/src/cache.cc
===================================================================
--- numa-bench/trunk/src/cache.cc	                        (rev 0)
+++ numa-bench/trunk/src/cache.cc	2008-02-10 18:37:27 UTC (rev 352)
@@ -0,0 +1,15 @@
+#include <iostream>
+#include <commons/cpuid.h>
+
+using namespace std;
+using namespace commons;
+
+int
+main()
+{
+  unsigned char iline, dline;
+  cache_line_sizes_amd(&iline, &dline);
+  cout << "AMD: " << (unsigned int) iline << ' ' << (unsigned int) dline << endl;
+  cout << "Intel: " << cache_line_sizes_intel() << endl;
+  return 0;
+}

Added: numa-bench/trunk/src/malloc.cc
===================================================================
--- numa-bench/trunk/src/malloc.cc	                        (rev 0)
+++ numa-bench/trunk/src/malloc.cc	2008-02-10 18:37:27 UTC (rev 352)
@@ -0,0 +1,33 @@
+// Does malloc tend to allocate locally?
+
+#include <cstdlib>
+#include <iostream>
+#include <time.h>
+#include <pthread.h>
+
+using namespace std;
+
+const size_t size = 10000000;
+
+void
+touch(void *pp)
+{
+  char *p = (char*) pp;
+  const int reps = 100;
+  time_t t0 = time(NULL);
+  for (int c = 0; c < reps; c++) {
+    for (size_t i = 0; i < size; i++) {
+      p[i] = i;
+    }
+  }
+  time_t t1 = time(NULL);
+  cout << t1 - t0 << endl;
+}
+
+int
+main()
+{
+  void *p = malloc(size);
+  touch(p);
+  return 0;
+}

Added: numa-bench/trunk/src/thrash.cc
===================================================================
--- numa-bench/trunk/src/thrash.cc	                        (rev 0)
+++ numa-bench/trunk/src/thrash.cc	2008-02-10 18:37:27 UTC (rev 352)
@@ -0,0 +1,38 @@
+#include <iostream>
+#include <pthread.h>
+#include <unistd.h>
+
+using namespace std;
+
+const int size = 100000000;
+
+void*
+f(void* p)
+{
+  int *xs = (int*) p;
+  for (int i = 0; i < size; i++) {
+    xs[i] = i;
+  }
+  cout << "hello, world" << endl;
+}
+
+int
+main()
+{
+  const int n = 16;
+  int *xs = new int[size];
+
+  pthread_attr_t a;
+  pthread_attr_init(&a);
+
+  pthread_t t[n];
+  for (int i = 0; i < n; i++) {
+    pthread_create(&t[i], &a, &f, xs);
+  }
+
+  void *x;
+  for (int i = 0; i < n; i++) {
+    pthread_join(t[i], &x);
+  }
+  return 0;
+}


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