Add JIT deform_counter

generation_counter includes time spent on both JIT:ing expressions
and tuple deforming which are configured independently via options
jit_expressions and jit_tuple_deforming.  As they are  combined in
the same counter it's not apparent what fraction of time the tuple
deforming takes.

This adds deform_counter dedicated to tuple deforming, which allows
seeing more directly the influence jit_tuple_deforming is having on
the query. The counter is exposed in EXPLAIN and pg_stat_statements
bumpin pg_stat_statements to 1.11.

Author: Dmitry Dolgov <9erthalion6@gmail.com>
Reviewed-by: Pavel Stehule <pavel.stehule@gmail.com>
Reviewed-by: Daniel Gustafsson <daniel@yesql.se>
Discussion: https://postgr.es/m/20220612091253.eegstkufdsu4kfls@erthalion.local

Author: danielgustafsson

contrib/pg_stat_statements/Makefile

@@ -7,6 +7,7 @@ OBJS = \
 
 EXTENSION = pg_stat_statements
 DATA = pg_stat_statements--1.4.sql \
+	pg_stat_statements--1.10--1.11.sql \
 	pg_stat_statements--1.9--1.10.sql pg_stat_statements--1.8--1.9.sql \
 	pg_stat_statements--1.7--1.8.sql pg_stat_statements--1.6--1.7.sql \
 	pg_stat_statements--1.5--1.6.sql pg_stat_statements--1.4--1.5.sql \

contrib/pg_stat_statements/meson.build

@@ -21,6 +21,7 @@ contrib_targets += pg_stat_statements
 install_data(
   'pg_stat_statements.control',
   'pg_stat_statements--1.4.sql',
+  'pg_stat_statements--1.10--1.11.sql',
   'pg_stat_statements--1.9--1.10.sql',
   'pg_stat_statements--1.8--1.9.sql',
   'pg_stat_statements--1.7--1.8.sql',

contrib/pg_stat_statements/pg_stat_statements--1.10--1.11.sql

@@ -0,0 +1,69 @@
+/* contrib/pg_stat_statements/pg_stat_statements--1.10--1.11.sql */
+
+-- complain if script is sourced in psql, rather than via ALTER EXTENSION
+\echo Use "ALTER EXTENSION pg_stat_statements UPDATE TO '1.11'" to load this file. \quit
+
+/* First we have to remove them from the extension */
+ALTER EXTENSION pg_stat_statements DROP VIEW pg_stat_statements;
+ALTER EXTENSION pg_stat_statements DROP FUNCTION pg_stat_statements(boolean);
+
+/* Then we can drop them */
+DROP VIEW pg_stat_statements;
+DROP FUNCTION pg_stat_statements(boolean);
+
+/* Now redefine */
+CREATE FUNCTION pg_stat_statements(IN showtext boolean,
+    OUT userid oid,
+    OUT dbid oid,
+    OUT toplevel bool,
+    OUT queryid bigint,
+    OUT query text,
+    OUT plans int8,
+    OUT total_plan_time float8,
+    OUT min_plan_time float8,
+    OUT max_plan_time float8,
+    OUT mean_plan_time float8,
+    OUT stddev_plan_time float8,
+    OUT calls int8,
+    OUT total_exec_time float8,
+    OUT min_exec_time float8,
+    OUT max_exec_time float8,
+    OUT mean_exec_time float8,
+    OUT stddev_exec_time float8,
+    OUT rows int8,
+    OUT shared_blks_hit int8,
+    OUT shared_blks_read int8,
+    OUT shared_blks_dirtied int8,
+    OUT shared_blks_written int8,
+    OUT local_blks_hit int8,
+    OUT local_blks_read int8,
+    OUT local_blks_dirtied int8,
+    OUT local_blks_written int8,
+    OUT temp_blks_read int8,
+    OUT temp_blks_written int8,
+    OUT blk_read_time float8,
+    OUT blk_write_time float8,
+    OUT temp_blk_read_time float8,
+    OUT temp_blk_write_time float8,
+    OUT wal_records int8,
+    OUT wal_fpi int8,
+    OUT wal_bytes numeric,
+    OUT jit_functions int8,
+    OUT jit_generation_time float8,
+    OUT jit_inlining_count int8,
+    OUT jit_inlining_time float8,
+    OUT jit_optimization_count int8,
+    OUT jit_optimization_time float8,
+    OUT jit_emission_count int8,
+    OUT jit_emission_time float8,
+    OUT jit_deform_count int8,
+    OUT jit_deform_time float8
+)
+RETURNS SETOF record
+AS 'MODULE_PATHNAME', 'pg_stat_statements_1_11'
+LANGUAGE C STRICT VOLATILE PARALLEL SAFE;
+
+CREATE VIEW pg_stat_statements AS
+  SELECT * FROM pg_stat_statements(true);
+
+GRANT SELECT ON pg_stat_statements TO PUBLIC;

contrib/pg_stat_statements/pg_stat_statements.c

@@ -117,7 +117,8 @@ typedef enum pgssVersion
 	PGSS_V1_3,
 	PGSS_V1_8,
 	PGSS_V1_9,
-	PGSS_V1_10
+	PGSS_V1_10,
+	PGSS_V1_11
 } pgssVersion;
 
 typedef enum pgssStoreKind
@@ -192,6 +193,10 @@ typedef struct Counters
 	double		jit_generation_time;	/* total time to generate jit code */
 	int64		jit_inlining_count; /* number of times inlining time has been
 									 * > 0 */
+	double		jit_deform_time;	/* total time to deform tuples in jit code */
+	int64		jit_deform_count;	/* number of times deform time has been >
+									 * 0 */
+
 	double		jit_inlining_time;	/* total time to inline jit code */
 	int64		jit_optimization_count; /* number of times optimization time
 										 * has been > 0 */
@@ -312,6 +317,7 @@ PG_FUNCTION_INFO_V1(pg_stat_statements_1_3);
 PG_FUNCTION_INFO_V1(pg_stat_statements_1_8);
 PG_FUNCTION_INFO_V1(pg_stat_statements_1_9);
 PG_FUNCTION_INFO_V1(pg_stat_statements_1_10);
+PG_FUNCTION_INFO_V1(pg_stat_statements_1_11);
 PG_FUNCTION_INFO_V1(pg_stat_statements);
 PG_FUNCTION_INFO_V1(pg_stat_statements_info);
 
@@ -1398,6 +1404,10 @@ pgss_store(const char *query, uint64 queryId,
 			e->counters.jit_functions += jitusage->created_functions;
 			e->counters.jit_generation_time += INSTR_TIME_GET_MILLISEC(jitusage->generation_counter);
 
+			if (INSTR_TIME_GET_MILLISEC(jitusage->deform_counter))
+				e->counters.jit_deform_count++;
+			e->counters.jit_deform_time += INSTR_TIME_GET_MILLISEC(jitusage->deform_counter);
+
 			if (INSTR_TIME_GET_MILLISEC(jitusage->inlining_counter))
 				e->counters.jit_inlining_count++;
 			e->counters.jit_inlining_time += INSTR_TIME_GET_MILLISEC(jitusage->inlining_counter);
@@ -1460,7 +1470,8 @@ pg_stat_statements_reset(PG_FUNCTION_ARGS)
 #define PG_STAT_STATEMENTS_COLS_V1_8	32
 #define PG_STAT_STATEMENTS_COLS_V1_9	33
 #define PG_STAT_STATEMENTS_COLS_V1_10	43
-#define PG_STAT_STATEMENTS_COLS			43	/* maximum of above */
+#define PG_STAT_STATEMENTS_COLS_V1_11	45
+#define PG_STAT_STATEMENTS_COLS			45	/* maximum of above */
 
 /*
  * Retrieve statement statistics.
@@ -1472,6 +1483,16 @@ pg_stat_statements_reset(PG_FUNCTION_ARGS)
  * expected API version is identified by embedding it in the C name of the
  * function.  Unfortunately we weren't bright enough to do that for 1.1.
  */
+Datum
+pg_stat_statements_1_11(PG_FUNCTION_ARGS)
+{
+	bool		showtext = PG_GETARG_BOOL(0);
+
+	pg_stat_statements_internal(fcinfo, PGSS_V1_11, showtext);
+
+	return (Datum) 0;
+}
+
 Datum
 pg_stat_statements_1_10(PG_FUNCTION_ARGS)
 {
@@ -1602,6 +1623,10 @@ pg_stat_statements_internal(FunctionCallInfo fcinfo,
 			if (api_version != PGSS_V1_10)
 				elog(ERROR, "incorrect number of output arguments");
 			break;
+		case PG_STAT_STATEMENTS_COLS_V1_11:
+			if (api_version != PGSS_V1_11)
+				elog(ERROR, "incorrect number of output arguments");
+			break;
 		default:
 			elog(ERROR, "incorrect number of output arguments");
 	}
@@ -1834,6 +1859,11 @@ pg_stat_statements_internal(FunctionCallInfo fcinfo,
 			values[i++] = Int64GetDatumFast(tmp.jit_emission_count);
 			values[i++] = Float8GetDatumFast(tmp.jit_emission_time);
 		}
+		if (api_version >= PGSS_V1_11)
+		{
+			values[i++] = Int64GetDatumFast(tmp.jit_deform_count);
+			values[i++] = Float8GetDatumFast(tmp.jit_deform_time);
+		}
 
 		Assert(i == (api_version == PGSS_V1_0 ? PG_STAT_STATEMENTS_COLS_V1_0 :
 					 api_version == PGSS_V1_1 ? PG_STAT_STATEMENTS_COLS_V1_1 :
@@ -1842,6 +1872,7 @@ pg_stat_statements_internal(FunctionCallInfo fcinfo,
 					 api_version == PGSS_V1_8 ? PG_STAT_STATEMENTS_COLS_V1_8 :
 					 api_version == PGSS_V1_9 ? PG_STAT_STATEMENTS_COLS_V1_9 :
 					 api_version == PGSS_V1_10 ? PG_STAT_STATEMENTS_COLS_V1_10 :
+					 api_version == PGSS_V1_11 ? PG_STAT_STATEMENTS_COLS_V1_11 :
 					 -1 /* fail if you forget to update this assert */ ));
 
 		tuplestore_putvalues(rsinfo->setResult, rsinfo->setDesc, values, nulls);

contrib/pg_stat_statements/pg_stat_statements.control

@@ -1,5 +1,5 @@
 # pg_stat_statements extension
 comment = 'track planning and execution statistics of all SQL statements executed'
-default_version = '1.10'
+default_version = '1.11'
 module_pathname = '$libdir/pg_stat_statements'
 relocatable = true

doc/src/sgml/jit.sgml

@@ -170,7 +170,7 @@ SET
  JIT:
    Functions: 3
    Options: Inlining false, Optimization false, Expressions true, Deforming true
-   Timing: Generation 1.259 ms, Inlining 0.000 ms, Optimization 0.797 ms, Emission 5.048 ms, Total 7.104 ms
+   Timing: Generation 1.259 ms (Deform 0.000 ms), Inlining 0.000 ms, Optimization 0.797 ms, Emission 5.048 ms, Total 7.104 ms
  Execution Time: 7.416 ms
 </screen>
    As visible here, <acronym>JIT</acronym> was used, but inlining and

doc/src/sgml/pgstatstatements.sgml

@@ -420,6 +420,25 @@
       </para></entry>
      </row>
 
+     <row>
+      <entry role="catalog_table_entry"><para role="column_definition">
+       <structfield>jit_deform_count</structfield> <type>bigint</type>
+      </para>
+      <para>
+       Total number of tuple deform functions JIT-compiled by the statement
+      </para></entry>
+     </row>
+
+     <row>
+      <entry role="catalog_table_entry"><para role="column_definition">
+       <structfield>jit_deform_time</structfield> <type>double precision</type>
+      </para>
+      <para>
+        Total time spent by the statement on JIT-compiling tuple deform
+        functions, in milliseconds
+      </para></entry>
+     </row>
+
      <row>
       <entry role="catalog_table_entry"><para role="column_definition">
        <structfield>jit_inlining_count</structfield> <type>bigint</type>

src/backend/commands/explain.c

@@ -893,6 +893,7 @@ ExplainPrintJIT(ExplainState *es, int jit_flags, JitInstrumentation *ji)
 
 	/* calculate total time */
 	INSTR_TIME_SET_ZERO(total_time);
+	/* don't add deform_counter, it's included in generation_counter */
 	INSTR_TIME_ADD(total_time, ji->generation_counter);
 	INSTR_TIME_ADD(total_time, ji->inlining_counter);
 	INSTR_TIME_ADD(total_time, ji->optimization_counter);
@@ -920,8 +921,9 @@ ExplainPrintJIT(ExplainState *es, int jit_flags, JitInstrumentation *ji)
 		{
 			ExplainIndentText(es);
 			appendStringInfo(es->str,
-							 "Timing: %s %.3f ms, %s %.3f ms, %s %.3f ms, %s %.3f ms, %s %.3f ms\n",
+							 "Timing: %s %.3f ms (%s %.3f ms), %s %.3f ms, %s %.3f ms, %s %.3f ms, %s %.3f ms\n",
 							 "Generation", 1000.0 * INSTR_TIME_GET_DOUBLE(ji->generation_counter),
+							 "Deform", 1000.0 * INSTR_TIME_GET_DOUBLE(ji->deform_counter),
 							 "Inlining", 1000.0 * INSTR_TIME_GET_DOUBLE(ji->inlining_counter),
 							 "Optimization", 1000.0 * INSTR_TIME_GET_DOUBLE(ji->optimization_counter),
 							 "Emission", 1000.0 * INSTR_TIME_GET_DOUBLE(ji->emission_counter),
@@ -945,9 +947,15 @@ ExplainPrintJIT(ExplainState *es, int jit_flags, JitInstrumentation *ji)
 		{
 			ExplainOpenGroup("Timing", "Timing", true, es);
 
-			ExplainPropertyFloat("Generation", "ms",
+			ExplainOpenGroup("Generation", "Generation", true, es);
+			ExplainPropertyFloat("Deform", "ms",
+								 1000.0 * INSTR_TIME_GET_DOUBLE(ji->deform_counter),
+								 3, es);
+			ExplainPropertyFloat("Total", "ms",
 								 1000.0 * INSTR_TIME_GET_DOUBLE(ji->generation_counter),
 								 3, es);
+			ExplainCloseGroup("Generation", "Generation", true, es);
+
 			ExplainPropertyFloat("Inlining", "ms",
 								 1000.0 * INSTR_TIME_GET_DOUBLE(ji->inlining_counter),
 								 3, es);

src/backend/jit/jit.c

@@ -185,6 +185,7 @@ InstrJitAgg(JitInstrumentation *dst, JitInstrumentation *add)
 {
 	dst->created_functions += add->created_functions;
 	INSTR_TIME_ADD(dst->generation_counter, add->generation_counter);
+	INSTR_TIME_ADD(dst->deform_counter, add->deform_counter);
 	INSTR_TIME_ADD(dst->inlining_counter, add->inlining_counter);
 	INSTR_TIME_ADD(dst->optimization_counter, add->optimization_counter);
 	INSTR_TIME_ADD(dst->emission_counter, add->emission_counter);

src/backend/jit/llvm/llvmjit_expr.c

@@ -121,7 +121,9 @@ llvm_compile_expr(ExprState *state)
 	LLVMValueRef v_aggnulls;
 
 	instr_time	starttime;
+	instr_time	deform_starttime;
 	instr_time	endtime;
+	instr_time	deform_endtime;
 
 	llvm_enter_fatal_on_oom();
 
@@ -315,10 +317,14 @@ llvm_compile_expr(ExprState *state)
 					 */
 					if (tts_ops && desc && (context->base.flags & PGJIT_DEFORM))
 					{
+						INSTR_TIME_SET_CURRENT(deform_starttime);
 						l_jit_deform =
 							slot_compile_deform(context, desc,
 												tts_ops,
 												op->d.fetch.last_var);
+						INSTR_TIME_SET_CURRENT(deform_endtime);
+						INSTR_TIME_ACCUM_DIFF(context->base.instr.deform_counter,
+											  deform_endtime, deform_starttime);
 					}
 
 					if (l_jit_deform)