[Assorted-commits] SF.net SVN: assorted: [419] numa-bench/trunk/src/malloc.cc

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

Revision: 419
          http://assorted.svn.sourceforge.net/assorted/?rev=419&view=rev
Author:   yangzhang
Date:     2008-02-14 17:44:42 -0800 (Thu, 14 Feb 2008)

Log Message:
-----------
cleaned up content

Modified Paths:
--------------
    numa-bench/trunk/src/malloc.cc

Modified: numa-bench/trunk/src/malloc.cc
===================================================================
--- numa-bench/trunk/src/malloc.cc	2008-02-15 01:44:23 UTC (rev 418)
+++ numa-bench/trunk/src/malloc.cc	2008-02-15 01:44:42 UTC (rev 419)
@@ -1,24 +1,3 @@
-// Questions this program answers:
-//
-// - Does malloc tend to allocate locally?
-//   - TODO!
-// - How much does working from another node affect throughput?
-//   - A bit: 647x from local, 649x from neighbor, 651x from remote
-// - Is there difference from repeatedly fetching the same (large) area n times
-//   vs. fetching an area n times larger?
-//   - No. The times are identical for 1GB*1 and 100MB*10.
-// - How much difference is there between sequential scan and random access?
-//   - Huge difference. Also magnifies the locality effects more.
-//   - 1700 from local, 1990 from one neighbor, 2020 from another neighbor,
-//     and 2310 from remote.
-// - What's the difference between reading and writing?
-//   - TODO!
-// - Can we observe prefetching's effects? (Random access but chew the full
-//   cache line of data.)
-//   - TODO!
-
-// TODO: use real shuffling? or is rand ok?
-
 #include <cstdlib>
 #include <fstream>
 #include <iostream>
@@ -171,6 +150,8 @@
     }
     int barrier_result = pthread_barrier_wait(&cross_barrier);
     check(barrier_result == PTHREAD_BARRIER_SERIAL_THREAD || barrier_result == 0);
+    // TODO: make this more interesting than just a sequential traversal over
+    // the partitions.
     for (int i = 0; i < config.ncores; i++) {
       chew1(partitions[i][cpu], config, len);
     }


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