MonetDB: partioned-hash - Easily disable making hash persistent.

[Sjoerd Mullender]

Changeset: abc7da8ac8f9 for MonetDB
URL: http://dev.monetdb.org/hg/MonetDB?cmd=changeset;node=abc7da8ac8f9
Modified Files:
        gdk/gdk_hash.c
Branch: partioned-hash
Log Message:

Easily disable making hash persistent.


diffs (41 lines):

diff --git a/gdk/gdk_hash.c b/gdk/gdk_hash.c
--- a/gdk/gdk_hash.c
+++ b/gdk/gdk_hash.c
@@ -22,6 +22,8 @@
 #define HASHMAXCHUNKSLOG       4
 #define HASHMAXCHUNKS          (1 << HASHMAXCHUNKSLOG)
 
+/* #define DISABLE_HASHSYNC */
+
 static BUN
 HASHmask(BUN cnt, int tpe)
 {
@@ -360,6 +362,7 @@ BATparthash(BAT *b, Hash *h, int piece)
        }
 }
 
+#ifdef DISABLE_HASHSYNC
 static void
 BAThashsync(void *arg)
 {
@@ -387,6 +390,7 @@ BAThashsync(void *arg)
        close(fd);
        ALGODEBUG fprintf(stderr, "#BAThash: persisting hash %s (" LLFMT " 
usec)\n", hp->filename, GDKusec() - t0);
 }
+#endif
 
 gdk_return
 BAThash(BAT *b)
@@ -457,10 +461,12 @@ BAThash(BAT *b)
                b->T->hash = h;
                /* unlock before potentially expensive sync */
                MT_lock_unset(&GDKhashLock(abs(b->batCacheid)), "BAThash");
+#ifdef DISABLE_HASHSYNC
                if (BBP_status(b->batCacheid) & BBPEXISTING) {
                        MT_Id tid;
                        MT_create_thread(&tid, BAThashsync, hp, 
MT_THR_DETACHED);
                }
+#endif
                return GDK_SUCCEED;
        }
   bailout:
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