* Introduce warmup phase to BenchmarkRunner (#1130)
In order to account for caching effects in user
benchmarks introduce a new command line option
"--benchmark_min_warmup_time"
which allows to specify an amount of time for
which the benchmark should be run before results
are meaningful.
* Adapt review suggestions regarding introduction of warmup phase (#1130)
* Fix BM_CHECK call in MinWarmUpTime (#1130)
* Fix comment on requirements of MinWarmUpTime (#1130)
* Add basic description of warmup phase mechanism to user guide (#1130)
* Add option to set the default time unit globally
This commit introduces the `--benchmark_time_unit={ns|us|ms|s}` command line argument. The argument only affects benchmarks where the time unit is not set explicitly.
* Update AUTHORS and CONTRIBUTORS
* Test `SetDefaultTimeUnit`
* clang format
* Use `GetDefaultTimeUnit()` for initializing `TimeUnit` variables
* Review fixes
* Export functions
* Add comment
* Add Setup/Teardown option on Benchmark.
Motivations:
- feature parity with our internal library. (which has ~718 callers)
- more flexible than cordinating setup/teardown inside the benchmark routine.
* change Setup/Teardown callback type to raw function pointers
* add test file to cmake file
* move b.Teardown() up
* add const to param of Setup/Teardown callbacks
* fix comment and add doc to user_guide
* fix typo
* fix doc, fix test and add bindings to python/benchmark.cc
* fix binding again
* remove explicit C cast - that was wrong
* change policy to reference_internal
* try removing the bindinds ...
* clean up
* add more tests with repetitions and fixtures
* more comments
* init setup/teardown callbacks to NULL
* s/nullptr/NULL
* removed unused var
* change assertion on fixture_interaction::fixture_setup
* move NULL init to .cc file
Much like it makes sense to enumerate all the families,
it makes sense to enumerate stuff within families.
Alternatively, we could have a global instance index,
but i'm not sure why that would be better.
This will be useful when the benchmarks are run not in order,
for the tools to sort the results properly.
It may be useful for those wishing to further post-process JSON results,
but it is mainly geared towards better support for run interleaving,
where results from the same family may not be close-by in the JSON.
While we won't be able to do much about that for outputs,
the tools can and perhaps should reorder the results to that
at least in their output they are in proper order, not run order.
Note that this only counts the families that were filtered-in,
so if e.g. there were three families, and we filtered-out
the second one, the two families (which were first and third)
will have family indexes 0 and 1.
* Implementation of random interleaving. See
http://github.com/google/benchmark/issues/1051 for the feature requests.
Committer: Hai Huang (http://github.com/haih-g)
On branch fr-1051
Changes to be committed:
modified: include/benchmark/benchmark.h
modified: src/benchmark.cc
new file: src/benchmark_adjust_repetitions.cc
new file: src/benchmark_adjust_repetitions.h
modified: src/benchmark_api_internal.cc
modified: src/benchmark_api_internal.h
modified: src/benchmark_register.cc
modified: src/benchmark_runner.cc
modified: src/benchmark_runner.h
modified: test/CMakeLists.txt
new file: test/benchmark_random_interleaving_gtest.cc
* Fix benchmark_random_interleaving_gtest.cc for fr-1051
Committer: Hai Huang <haih@google.com>
On branch fr-1051
Your branch is up to date with 'origin/fr-1051'.
Changes to be committed:
modified: src/benchmark.cc
modified: src/benchmark_runner.cc
modified: test/benchmark_random_interleaving_gtest.cc
* Fix macos build for fr-1051
Committer: Hai Huang <haih@google.com>
On branch fr-1051
Your branch is up to date with 'origin/fr-1051'.
Changes to be committed:
modified: src/benchmark_api_internal.cc
modified: src/benchmark_api_internal.h
modified: src/benchmark_runner.cc
* Fix macos and windows build for fr-1051.
Committer: Hai Huang <haih@google.com>
On branch fr-1051
Your branch is up to date with 'origin/fr-1051'.
Changes to be committed:
modified: src/benchmark_runner.cc
* Fix benchmark_random_interleaving_test.cc for macos and windows in fr-1051
Committer: Hai Huang <haih@google.com>
On branch fr-1051
Your branch is up to date with 'origin/fr-1051'.
Changes to be committed:
modified: test/benchmark_random_interleaving_gtest.cc
* Fix int type benchmark_random_interleaving_gtest for macos in fr-1051
Committer: Hai Huang <haih@google.com>
On branch fr-1051
Your branch is up to date with 'origin/fr-1051'.
Changes to be committed:
modified: test/benchmark_random_interleaving_gtest.cc
* Address dominichamon's comments 03/29 for fr-1051
Committer: Hai Huang <haih@google.com>
On branch fr-1051
Your branch is up to date with 'origin/fr-1051'.
Changes to be committed:
modified: src/benchmark.cc
modified: src/benchmark_api_internal.cc
modified: src/benchmark_api_internal.h
modified: test/benchmark_random_interleaving_gtest.cc
* Address dominichamon's comment on default min_time / repetitions for fr-1051.
Also change sentinel of random_interleaving_repetitions to -1. Hopefully it
fixes the failures on Windows.
Committer: Hai Huang <haih@google.com>
On branch fr-1051
Your branch is up to date with 'origin/fr-1051'.
Changes to be committed:
modified: src/benchmark.cc
modified: src/benchmark_api_internal.cc
modified: src/benchmark_api_internal.h
* Fix windows test failures for fr-1051
Committer: Hai Huang <haih@google.com>
On branch fr-1051
Your branch is up to date with 'origin/fr-1051'.
Changes to be committed:
modified: src/benchmark_api_internal.cc
modified: src/benchmark_runner.cc
* Add license blurb for fr-1051.
Committer: Hai Huang <haih@google.com>
On branch fr-1051
Your branch is up to date with 'origin/fr-1051'.
Changes to be committed:
modified: src/benchmark_adjust_repetitions.cc
modified: src/benchmark_adjust_repetitions.h
* Switch to std::shuffle() for fr-1105.
Committer: Hai Huang <haih@google.com>
On branch fr-1051
Your branch is up to date with 'origin/fr-1051'.
Changes to be committed:
modified: src/benchmark.cc
* Change to 1e-9 in fr-1105
Committer: Hai Huang <haih@google.com>
On branch fr-1051
Your branch is up to date with 'origin/fr-1051'.
Changes to be committed:
modified: src/benchmark_adjust_repetitions.cc
* Fix broken build caused by bad merge for fr-1105.
Committer: Hai Huang <haih@google.com>
On branch fr-1051
Your branch is up to date with 'origin/fr-1051'.
Changes to be committed:
modified: src/benchmark_api_internal.cc
modified: src/benchmark_runner.cc
* Fix build breakage for fr-1051.
Committer: Hai Huang <haih@google.com>
On branch fr-1051
Your branch is up to date with 'origin/fr-1051'.
Changes to be committed:
modified: src/benchmark.cc
modified: src/benchmark_api_internal.cc
modified: src/benchmark_api_internal.h
modified: src/benchmark_register.cc
modified: src/benchmark_runner.cc
* Print out reports as they come in if random interleaving is disabled (fr-1051)
Committer: Hai Huang <haih@google.com>
On branch fr-1051
Your branch is up to date with 'origin/fr-1051'.
Changes to be committed:
modified: src/benchmark.cc
* size_t, int64_t --> int in benchmark_runner for fr-1051.
Committer: Hai Huang <haih@google.com>
On branch fr-1051
Your branch is up to date with 'origin/fr-1051'.
Changes to be committed:
modified: src/benchmark_runner.cc
modified: src/benchmark_runner.h
* Address comments from dominichamon for fr-1051
Committer: Hai Huang <haih@google.com>
On branch fr-1051
Your branch is up to date with 'origin/fr-1051'.
Changes to be committed:
modified: src/benchmark.cc
modified: src/benchmark_adjust_repetitions.cc
modified: src/benchmark_adjust_repetitions.h
modified: src/benchmark_api_internal.cc
modified: src/benchmark_api_internal.h
modified: test/benchmark_random_interleaving_gtest.cc
* benchmar_indices --> size_t to make CI pass: fr-1051
Committer: Hai Huang <haih@google.com>
On branch fr-1051
Your branch is up to date with 'origin/fr-1051'.
Changes to be committed:
modified: src/benchmark.cc
* Fix min_time not initialized issue for fr-1051.
Committer: Hai Huang <haih@google.com>
On branch fr-1051
Your branch is up to date with 'origin/fr-1051'.
Changes to be committed:
modified: src/benchmark_api_internal.cc
modified: src/benchmark_api_internal.h
* min_time --> MinTime in fr-1051.
Committer: Hai Huang <haih@google.com>
On branch fr-1051
Your branch is up to date with 'origin/fr-1051'.
Changes to be committed:
modified: src/benchmark_api_internal.cc
modified: src/benchmark_api_internal.h
modified: src/benchmark_runner.cc
* Add doc for random interleaving for fr-1051
Committer: Hai Huang <haih@google.com>
On branch fr-1051
Your branch is up to date with 'origin/fr-1051'.
Changes to be committed:
modified: README.md
new file: docs/random_interleaving.md
Co-authored-by: Dominic Hamon <dominichamon@users.noreply.github.com>
* Support optional, user-directed collection of performance counters
The patch allows an engineer wishing to drill into the root causes
of a regression, for example. Currently, only single threaded runs
are supported. The feature is a build-time opt in, and then a runtime
opt in.
The engineer may run the benchmark executable, passing a list of
performance counter names (using libpfm's naming scheme) at the
command line. The counter values will then be collected and reported
back as UserCounters.
This is different from #240 in that it is a benchmark user opt-in, and
the counter collection is transparent to the benchmark.
Currently, this is only supported on platforms where libpfm is
supported.
libpfm: http://perfmon2.sourceforge.net/
* 'Use' values param in Snapshot when BENCHMARK_OS_WINDOWS
This is to avoid unused parameter warning-as-error
* Added missing include for <vector> in perf_counters.cc
* Moved doc to docs
* Added license blurbs
This is a shameless rip-off of https://github.com/google/benchmark/pull/646
I did promise to look into why that proposed PR was producing
so much worse assembly, and so i finally did.
The reason is - that diff changes `size_t` (unsigned) to `int64_t` (signed).
There is this nice little `assert`:
7a1c370283/include/benchmark/benchmark.h (L744)
It ensures that we didn't magically decide to advance our iterator
when we should have finished benchmarking.
When `cached_` was unsigned, the `assert` was `cached_ UGT 0`.
But we only ever get to that `assert` if `cached_ NE 0`,
and naturally if `cached_` is not `0`, then it is bigger than `0`,
so the `assert` is tautological, and gets folded away.
But now that `cached_` became signed, the assert became `cached_ SGT 0`.
And we still only know that `cached_ NE 0`, so the assert can't be
optimized out, or at least it doesn't currently.
Regardless of whether or not that is a bug in itself,
that particular diff would have regressed the normal 64-bit systems,
by halving the maximal iteration space (since we go from unsigned counter
to signed one, of the same bit-width), which seems like a bug.
And just so it happens, fixing *this* bug, fixes the other bug.
This produces fully (bit-by-bit) identical state_assembly_test.s
The filecheck change is actually needed regardless of this patch,
else this test does not pass for me even without this diff.
The State constructor should not be part of the public API. Adding a
utility method to BenchmarkInstance allows us to avoid leaking the
RunInThread method into the public API.
