static str
addOptimizers(Client c, MalBlkPtr mb, char *pipe, int prepare)
{
int i;
InstrPtr q;
backend *be;
str msg= MAL_SUCCEED;
be = (backend *) c->sqlcontext;
assert(be && be->mvc); /* SQL clients should always have their state set */
(void) SQLgetSpace(be->mvc, mb, prepare); // detect empty bats.
/* The volcano optimizer seems relevant for traditional HDD settings.
* It produced about 8 % improvement onf TPCH SF 100 on a 16G machine.
* In a SSD setting it was counter productive, leading to worse parallel behavior.
* The automatic switch to volcano is now disabled assuming more use of SSD.
* The volcano optimizer pipeline can be used instead
if(space && (pipe == NULL || strcmp(pipe,"default_pipe")== 0)){
if( space > (lng)(0.8 * MT_npages() * MT_pagesize()) && GDKnr_threads > 1){
pipe = "volcano_pipe";
//mnstr_printf(GDKout, "#use volcano optimizer pipeline? %zu\n", space);
}else
pipe = "default_pipe";
} else
*/
pipe = pipe? pipe: "default_pipe";
msg = addOptimizerPipe(c, mb, pipe);
if (msg){
return msg;
}
mb->keephistory |= be->mvc->emod & mod_debug;
if (be->mvc->no_mitosis) {
for (i = mb->stop - 1; i > 0; i--) {
q = getInstrPtr(mb, i);
if (q->token == ENDsymbol)
break;
if (getFunctionId(q) == mitosisRef || getFunctionId(q) == dataflowRef)
q->token = REMsymbol; /* they are ignored */
}
}
addtoMalBlkHistory(mb);
return msg;
}
void
addOptimizers(Client c, MalBlkPtr mb, char *pipe)
{
int i;
InstrPtr q;
backend *be;
str msg;
lng space;
be = (backend *) c->sqlcontext;
assert(be && be->mvc); /* SQL clients should always have their state set */
space = SQLgetSpace(be->mvc, mb);
if(space && (pipe == NULL || strcmp(pipe,"default_pipe")== 0)){
if( space > (lng)(0.8 * MT_npages() * MT_pagesize()) && GDKnr_threads > 1){
pipe = "volcano_pipe";
//mnstr_printf(GDKout, "#use volcano optimizer pipeline? "SZFMT"\n", space);
}else
pipe = "default_pipe";
} else
pipe = pipe? pipe: "default_pipe";
msg = addOptimizerPipe(c, mb, pipe);
if (msg)
GDKfree(msg); /* what to do with an error? */
if (be->mvc->no_mitosis) {
for (i = mb->stop - 1; i > 0; i--) {
q = getInstrPtr(mb, i);
if (q->token == ENDsymbol)
break;
if (getFunctionId(q) == mitosisRef || getFunctionId(q) == dataflowRef)
q->token = REMsymbol; /* they are ignored */
}
}
if (be->mvc->emod & mod_debug)
addtoMalBlkHistory(mb, "getStatistics");
}
