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Add EXPLAIN support for JIT. 

This just shows a few details about JITing, e.g. how many functions
have been JITed, and how long that took.  To avoid noise in regression
tests with functions sometimes being JITed in --with-llvm builds,
disable display when COSTS OFF is specified.

Author: Andres Freund
Discussion: https://postgr.es/m/20170901064131.tazjxwus3k2w3ybh@alap3.anarazel.de
This commit is contained in:
Andres Freund 2018-03-28 13:26:51 -07:00
parent 9370462e9a
commit 1f0c6a9e7d
2 changed files with 61 additions and 0 deletions
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59
src/backend/commands/explain.c
View File

@ -21,6 +21,7 @@
#include "commands/prepare.h"
#include "executor/nodeHash.h"
#include "foreign/fdwapi.h"
#include "jit/jit.h"
#include "nodes/extensible.h"
#include "nodes/nodeFuncs.h"
#include "optimizer/clauses.h"
@ -556,6 +557,16 @@ ExplainOnePlan(PlannedStmt *plannedstmt, IntoClause *into, ExplainState *es,
if (es->analyze)
ExplainPrintTriggers(es, queryDesc);
/*
* Print info about JITing. Tied to es->costs because we don't want to
* display this in regression tests, as it'd cause output differences
* depending on build options. Might want to separate that out from COSTS
* at a later stage.
*/
if (queryDesc->estate->es_jit && es->costs &&
queryDesc->estate->es_jit->created_functions > 0)
ExplainPrintJIT(es, queryDesc);
/*
* Close down the query and free resources. Include time for this in the
* total execution time (although it should be pretty minimal).
@ -677,6 +688,54 @@ ExplainPrintTriggers(ExplainState *es, QueryDesc *queryDesc)
ExplainCloseGroup("Triggers", "Triggers", false, es);
}
/*
* ExplainPrintJIT -
* Append information about JITing to es->str.
*/
void
ExplainPrintJIT(ExplainState *es, QueryDesc *queryDesc)
{
JitContext *jc = queryDesc->estate->es_jit;
ExplainOpenGroup("JIT", "JIT", true, es);
if (es->format == EXPLAIN_FORMAT_TEXT)
{
es->indent += 1;
appendStringInfo(es->str, "JIT:\n");
}
ExplainPropertyInteger("Functions", NULL, jc->created_functions, es);
if (es->analyze && es->timing)
ExplainPropertyFloat("Generation Time", "ms",
1000.0 * INSTR_TIME_GET_DOUBLE(jc->generation_counter),
3, es);
ExplainPropertyBool("Inlining", jc->flags & PGJIT_INLINE, es);
if (es->analyze && es->timing)
ExplainPropertyFloat("Inlining Time", "ms",
1000.0 * INSTR_TIME_GET_DOUBLE(jc->inlining_counter),
3, es);
ExplainPropertyBool("Optimization", jc->flags & PGJIT_OPT3, es);
if (es->analyze && es->timing)
ExplainPropertyFloat("Optimization Time", "ms",
1000.0 * INSTR_TIME_GET_DOUBLE(jc->optimization_counter),
3, es);
if (es->analyze && es->timing)
ExplainPropertyFloat("Emission Time", "ms",
1000.0 * INSTR_TIME_GET_DOUBLE(jc->emission_counter),
3, es);
ExplainCloseGroup("JIT", "JIT", true, es);
if (es->format == EXPLAIN_FORMAT_TEXT)
{
es->indent -= 1;
}
}
/*
* ExplainQueryText -
* add a "Query Text" node that contains the actual text of the query

2
src/include/commands/explain.h
View File

@ -81,6 +81,8 @@ extern void ExplainOnePlan(PlannedStmt *plannedstmt, IntoClause *into,
extern void ExplainPrintPlan(ExplainState *es, QueryDesc *queryDesc);
extern void ExplainPrintTriggers(ExplainState *es, QueryDesc *queryDesc);
extern void ExplainPrintJIT(ExplainState *es, QueryDesc *queryDesc);
extern void ExplainQueryText(ExplainState *es, QueryDesc *queryDesc);
extern void ExplainBeginOutput(ExplainState *es);