From 51d38a4b79d54a97d438ecdba5ce94d6e9172eef Mon Sep 17 00:00:00 2001 From: Andreas Sandberg Date: Fri, 22 Apr 2016 22:26:56 +0100 Subject: stats: Add beta support for HDF5 stat dumps This changeset add support for stat dumps in the HDF5 file format. HDF5 is a binary data format that represents data in a file-system-like balanced tree. It has native support for N-dimensional arrays and binary data (e.g., frame buffers). It has the following benefits over traditional text stat files: * Efficient storage of time series (multiple stat dumps) * Fast lookup of stats * Plenty of existing tooling (e.g., Python libraries and graphical viewers) * File format can be used to store frame buffers together with normal stats. Drawbacks: * Large startup cost (single stat dump larger than text equivalent) * Stat dumps are slower than text Known limitations: * Distributions and histograms aren't supported. HDF5 stat output can be enabled using the 'h5' URL scheme when overriding the stat file name on gem5's command line. The following parameters are supported: * chunking (unsigned): Number of time steps to pre-allocate (default: 10) * desc (bool): Output stat descriptions (default: True) * formulas (bool): Output derived stats (default: True) Example gem5 command line: ./build/ARM/gem5.opt \ --stats-file="h5://stats.h5?desc=False;formulas=False" \ configs/example/fs.py Example Python stat consumer that computes IPC: import h5py f = h5py.File('stats.h5', 'r') group = f['/system/cpu'] for i, c in zip(group['committedInsts'], group['numCycles']): print i, c, i / c Change-Id: I351c6cbff2fb7bef9012f47876ba227ed288975b Signed-off-by: Andreas Sandberg Reviewed-by: Nikos Nikoleris Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/8121 Tested-by: kokoro Reviewed-by: Jason Lowe-Power Reviewed-by: Daniel Carvalho Reviewed-by: Ciro Santilli --- src/python/pybind11/stats.cc | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) (limited to 'src/python/pybind11') diff --git a/src/python/pybind11/stats.cc b/src/python/pybind11/stats.cc index 1302c7cc5..190c78d52 100644 --- a/src/python/pybind11/stats.cc +++ b/src/python/pybind11/stats.cc @@ -1,5 +1,5 @@ /* - * Copyright (c) 2017, 2019 ARM Limited + * Copyright (c) 2017-2019 ARM Limited * All rights reserved * * The license below extends only to copyright in the software and shall @@ -41,14 +41,20 @@ * Andreas Sandberg */ +#include "config/use_hdf5.hh" + #include "pybind11/pybind11.h" #include "pybind11/stl.h" #include "base/statistics.hh" #include "base/stats/text.hh" +#if USE_HDF5 +#include "base/stats/hdf5.hh" +#endif #include "sim/stat_control.hh" #include "sim/stat_register.hh" + namespace py = pybind11; namespace Stats { @@ -77,6 +83,9 @@ pybind_init_stats(py::module &m_native) m .def("initSimStats", &Stats::initSimStats) .def("initText", &Stats::initText, py::return_value_policy::reference) +#if USE_HDF5 + .def("initHDF5", &Stats::initHDF5) +#endif .def("registerPythonStatsHandlers", &Stats::registerPythonStatsHandlers) .def("schedStatEvent", &Stats::schedStatEvent) -- cgit v1.2.3