- Prefer an array of objects with `.name` fields over key/value pairs
for arbitrary collections of objects.
- Write common summary value names directly as fields.
The string used when constructing a summary is no longer a human
readable name, but rather a tag string (e.g. "nv/cold/time/gpu/mean").
These will make lookup easier and more stable going forward.
name vs. short_name no longer exists. Now there is just "name", which
is used for column headings. The "description" string may still be
used for detailed information.
Updated the json tests and compare script to reflect these changes.
Previously, convergence was tested by waiting for the relative stdev
of cuda timings ("noise") to drop below a certain percentage
(`max_noise`).
This assumed that all benchmarks would eventually see their noise drop
to some threshold, but this is not the case. In practice, many benchmarks
never converge to the default 0.5% relative stdev and instead will always
run to the 15s timeout -- even if the means have converged in a second
or two.
Added a new check that tests when the noise itself stabilizes and ends
the benchmark, even if noise > max_noise.
After testing, this patch alone significantly reduces the runtime of the
Thrust+CUB benchmark suite (from 30 hours to 5 hours) and produces similar
timing results.
The parameters used to tune this feature are not exposed -- if this
approach works long-term and there's a strong motivation to let users
tweak them, then we can worry about names/APIs/CLI/docs later.
This will provide functionality such as clock locking (--lgm),
persistance mode (--pm), device querying (--list), version checking
(--version), and documentation (--help).
This is possible already with any nvbench executable, but having
one with a reliable name will be helpful for scripting and writing
documentation.
- nvbench::benchmark doesn't add state, no need to override the destructor.
- nvbench::printer_base's virtual API should support decoration, not just
overriding. Making the virtual API protected instead of private allows
derived classes to extend base class behavior.
- nvbench::printer_base needs a virtual destructor.
- Fix a bug in nvbench::printer_multiplex that caused the new
`get_[total|completed]_state_count()` methods to always return 0.
- /W4 on MSVC
- -Wall -Wextra + others on gcc/clang
- New NVBench_ENABLE_WERROR option to toggle "warnings as errors"
- Mark the nlohmann_json library as IMPORTED to switch to system includes
- Rename nvbench_main -> nvbench.main to follow target name conventions
- Explicitly suppress some cudafe warnings when compiling templates in
nlohmann_json headers.
- Explicitly suppress some warnings from Thrust headers.
- Various fixes for warnings exposed by new flags.
- Disable CUPTI on CTK < 11.3 (See #52).
Locking clocks is currently only implemented for Volta+ devices.
Example usage:
my_bench -d [0,1,3] --persistence-mode 1 --lock-gpu-clocks base
See the cli_help.md docs for more info.
