Changeset: aa750d34eaf9 for MonetDB
URL: http://dev.monetdb.org/hg/MonetDB?cmd=changeset;node=aa750d34eaf9
Modified Files:
monetdb5/mal/mal_dataflow.c
Branch: default
Log Message:
Simplify punishment control
It produced the best performance of Q1 sofar in my setup.
diffs (29 lines):
diff --git a/monetdb5/mal/mal_dataflow.c b/monetdb5/mal/mal_dataflow.c
--- a/monetdb5/mal/mal_dataflow.c
+++ b/monetdb5/mal/mal_dataflow.c
@@ -880,21 +880,16 @@ runDFLOWworker(void *t)
long delay, clk = (GDKusec()- usec)/1000;
int rss=0;
double factor = 1.0;
- if ( clk > DELAYUNIT ) {
+ if ( clk > DELAYUNIT && task->todo->last ) {
mal_set_lock(mal_delayLock, "runMALdataflow");
asleep++;
- /* speedup as we see more threads asleep */
- clk = (long) (clk * (1.0-
asleep/GDKnr_threads));
- /* always keep one running to avoid all waiting
for a chain context switch */
- if ( asleep >= GDKnr_threads)
- clk = -2 * DELAYUNIT;
mal_unset_lock(mal_delayLock, "runMALdataflow");
- /* if there are no other instructions in the
queue, then simply wait for them */
- if ( task->todo->last == 0)
- clk = -3 * DELAYUNIT;
PARDEBUG mnstr_printf(GDKstdout,"#delay %d
initial %ld\n", task->id, clk);
while (clk > 0 ){
+ /* always keep two running to avoid all
waiting for a chain context switch */
+ if ( asleep >= GDKnr_threads - 1)
+ break;
/* speed up wake up when we have memory
or too many sleepers */
/* don't call getrss too often */
if ( rss++ % 10 == 0)
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