Commit Graph

10 Commits

Author SHA1 Message Date
Wilson Snyder
e76f29e5ba Copyright year update 2024-01-01 03:19:59 -05:00
Geza Lore
4c0edd2efb Improve --prof-exec infrastructure and report
Again --prof-exec have bit-rotted a little with all the recent changes
to the structure of the generated code. This patch contains a few
improvements:
- Repalce the eval/evl_loop begin/end events with generic
  section_push/section_pop events, that can be arbitrarily sprinkled
  into the generate code (so long as they are matched correctly) to
  measure various sections. The report then contains a nested profile
  of the sections, and the VCD trace shows the section names.
- Better handling of exec graphs
- Clearer overall statistics
2023-10-21 21:09:03 +01:00
Wilson Snyder
b24d7c83d3 Copyright year update 2023-01-01 10:18:39 -05:00
Wilson Snyder
b6cdae30f6 docs: Fix grammar. 2022-12-10 20:09:47 -05:00
Geza Lore
b1b5b5dfe2 Improve run-time profiling
The --prof-threads option has been split into two independent options:
1. --prof-exec, for collecting verilator_gantt and other execution
related profiling data, and
2. --prof-pgo, for collecting data needed for PGO

The implementation of execution profiling is extricated from
VlThreadPool and is now a separate class VlExecutionProfiler. This means
--prof-exec can now be used for single-threaded models (though it does
not measure a lot of things just yet). For consistency VerilatedProfiler
is renamed VlPgoProfiler. Both VlExecutionProfiler and VlPgoProfiler are
in verilated_profiler.{h/cpp}, but can be used completely independently.

Also re-worked the execution profile format so it now only emits events
without holding onto any temporaries. This is in preparation for some
future optimizations that would be hindered by the introduction of function
locals via AstText.

Also removed the Barrier event. Clearing the profile buffers is not
notably more expensive as the profiling records are trivially
destructible.
2022-03-27 15:57:30 +02:00
Larry Doolittle
c2d18d8ae4
Commentary: More minor spelling fixes in docs/guide/*.rst (#3331) 2022-03-01 22:07:12 -05:00
Wilson Snyder
ca42be982c Copyright year update. 2022-01-01 08:26:40 -05:00
Wilson Snyder
8ab51dbf22 Verilator_gantt: remove ASCII graphics 2021-09-24 08:48:20 -04:00
Wilson Snyder
c2819923c5 Verilator_gantt now shows the predicted mtask times, eval times, and additional statistics. 2021-09-23 22:59:36 -04:00
Wilson Snyder
adce7ecf4b Documentation has been rewritten into a book format. 2021-04-11 18:55:06 -04:00