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Collect JIT instrumentation from workers.

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Previously, when using parallel query, EXPLAIN (ANALYZE)'s JIT
compilation timings did not include the overhead from doing so on the
workers.  Fix that.

We do so by simply aggregating the cost of doing JIT compilation on
workers and the leader together. Arguably that's not quite accurate,
because the total time spend doing so is spent in parallel - but it's
hard to do much better.  For additional detail, when VERBOSE is
specified, the stats for workers are displayed separately.

Author: Amit Khandekar and Andres Freund
Discussion: https://postgr.es/m/CAJ3gD9eLrz51RK_gTkod+71iDcjpB_N8eC6vU2AW-VicsAERpQ@mail.gmail.com
Backpatch: 11-
This commit is contained in:
Andres Freund
2018-09-25 12:54:29 -07:00
parent 5e22171310
commit 33001fd7a7
11 changed files with 211 additions and 46 deletions
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1
src/include/executor/execParallel.h
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@@ -27,6 +27,7 @@ typedef struct ParallelExecutorInfo
ParallelContext *pcxt; /* parallel context we're using */
BufferUsage *buffer_usage; /* points to bufusage area in DSM */
SharedExecutorInstrumentation *instrumentation; /* optional */
struct SharedJitInstrumentation *jit_instrumentation; /* optional */
dsa_area *area; /* points to DSA area in DSM */
dsa_pointer param_exec; /* serialized PARAM_EXEC parameters */
bool finished; /* set true by ExecParallelFinish */