tvl-depot/absl/random/internal/randen_benchmarks.cc

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Export of internal Abseil changes. -- 7a6ff16a85beb730c172d5d25cf1b5e1be885c56 by Laramie Leavitt <lar@google.com>: Internal change. PiperOrigin-RevId: 254454546 -- ff8f9bafaefc26d451f576ea4a06d150aed63f6f by Andy Soffer <asoffer@google.com>: Internal changes PiperOrigin-RevId: 254451562 -- deefc5b651b479ce36f0b4ef203e119c0c8936f2 by CJ Johnson <johnsoncj@google.com>: Account for subtracting unsigned values from the size of InlinedVector PiperOrigin-RevId: 254450625 -- 3c677316a27bcadc17e41957c809ca472d5fef14 by Andy Soffer <asoffer@google.com>: Add C++17's std::make_from_tuple to absl/utility/utility.h PiperOrigin-RevId: 254411573 -- 4ee3536a918830eeec402a28fc31a62c7c90b940 by CJ Johnson <johnsoncj@google.com>: Adds benchmark for the rest of the InlinedVector public API PiperOrigin-RevId: 254408378 -- e5a21a00700ee83498ff1efbf649169756463ee4 by CJ Johnson <johnsoncj@google.com>: Updates the definition of InlinedVector::shrink_to_fit() to be exception safe and adds exception safety tests for it. PiperOrigin-RevId: 254401387 -- 2ea82e72b86d82d78b4e4712a63a55981b53c64b by Laramie Leavitt <lar@google.com>: Use absl::InsecureBitGen in place of std::mt19937 in tests absl/random/...distribution_test.cc PiperOrigin-RevId: 254289444 -- fa099e02c413a7ffda732415e8105cad26a90337 by Andy Soffer <asoffer@google.com>: Internal changes PiperOrigin-RevId: 254286334 -- ce34b7f36933b30cfa35b9c9a5697a792b5666e4 by Andy Soffer <asoffer@google.com>: Internal changes PiperOrigin-RevId: 254273059 -- 6f9c473da7c2090c2e85a37c5f00622e8a912a89 by Jorg Brown <jorg@google.com>: Change absl::container_internal::CompressedTuple to instantiate its internal Storage class with the name of the type it's holding, rather than the name of the Tuple. This is not an externally-visible change, other than less compiler memory is used and less debug information is generated. PiperOrigin-RevId: 254269285 -- 8bd3c186bf2fc0c55d8a2dd6f28a5327502c9fba by Andy Soffer <asoffer@google.com>: Adding short-hand IntervalClosed for IntervalClosedClosed and IntervalOpen for IntervalOpenOpen. PiperOrigin-RevId: 254252419 -- ea957f99b6a04fccd42aa05605605f3b44b1ecfd by Abseil Team <absl-team@google.com>: Do not directly use __SIZEOF_INT128__. In order to avoid linker errors when building with clang-cl (__fixunsdfti, __udivti3 and __fixunssfti are undefined), this CL uses ABSL_HAVE_INTRINSIC_INT128 which is not defined for clang-cl. PiperOrigin-RevId: 254250739 -- 89ab385cd26b34d64130bce856253aaba96d2345 by Andy Soffer <asoffer@google.com>: Internal changes PiperOrigin-RevId: 254242321 -- cffc793d93eca6d6bdf7de733847b6ab4a255ae9 by CJ Johnson <johnsoncj@google.com>: Adds benchmark for InlinedVector::reserve(size_type) PiperOrigin-RevId: 254199226 -- c90c7a9fa3c8f0c9d5114036979548b055ea2f2a by Gennadiy Rozental <rogeeff@google.com>: Import of CCTZ from GitHub. PiperOrigin-RevId: 254072387 -- c4c388beae016c9570ab54ffa1d52660e4a85b7b by Laramie Leavitt <lar@google.com>: Internal cleanup. PiperOrigin-RevId: 254062381 -- d3c992e221cc74e5372d0c8fa410170b6a43c062 by Tom Manshreck <shreck@google.com>: Update distributions.h to Abseil standards PiperOrigin-RevId: 254054946 -- d15ad0035c34ef11b14fadc5a4a2d3ec415f5518 by CJ Johnson <johnsoncj@google.com>: Removes functions with only one caller from the implementation details of InlinedVector by manually inlining the definitions PiperOrigin-RevId: 254005427 -- 2f37e807efc3a8ef1f4b539bdd379917d4151520 by Andy Soffer <asoffer@google.com>: Initial release of Abseil Random PiperOrigin-RevId: 253999861 -- 24ed1694b6430791d781ed533a8f8ccf6cac5856 by CJ Johnson <johnsoncj@google.com>: Updates the definition of InlinedVector::assign(...)/InlinedVector::operator=(...) to new, exception-safe implementations with exception safety tests to boot PiperOrigin-RevId: 253993691 -- 5613d95f5a7e34a535cfaeadce801441e990843e by CJ Johnson <johnsoncj@google.com>: Adds benchmarks for InlinedVector::shrink_to_fit() PiperOrigin-RevId: 253989647 -- 2a96ddfdac40bbb8cb6a7f1aeab90917067c6e63 by Abseil Team <absl-team@google.com>: Initial release of Abseil Random PiperOrigin-RevId: 253927497 -- bf1aff8fc9ffa921ad74643e9525ecf25b0d8dc1 by Andy Soffer <asoffer@google.com>: Initial release of Abseil Random PiperOrigin-RevId: 253920512 -- bfc03f4a3dcda3cf3a4b84bdb84cda24e3394f41 by Laramie Leavitt <lar@google.com>: Internal change. PiperOrigin-RevId: 253886486 -- 05036cfcc078ca7c5f581a00dfb0daed568cbb69 by Eric Fiselier <ericwf@google.com>: Don't include `winsock2.h` because it drags in `windows.h` and friends, and they define awful macros like OPAQUE, ERROR, and more. This has the potential to break abseil users. Instead we only forward declare `timeval` and require Windows users include `winsock2.h` themselves. This is both inconsistent and poor QoI, but so including 'windows.h' is bad too. PiperOrigin-RevId: 253852615 GitOrigin-RevId: 7a6ff16a85beb730c172d5d25cf1b5e1be885c56 Change-Id: Icd6aff87da26f29ec8915da856f051129987cef6
2019-06-21 22:11:42 +02:00
// Copyright 2017 The Abseil Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
#include "absl/random/internal/randen.h"
#include <cstdint>
#include <cstdio>
#include <cstring>
#include "absl/base/internal/raw_logging.h"
#include "absl/random/internal/nanobenchmark.h"
#include "absl/random/internal/platform.h"
#include "absl/random/internal/randen_engine.h"
#include "absl/random/internal/randen_hwaes.h"
#include "absl/random/internal/randen_slow.h"
#include "absl/strings/numbers.h"
namespace {
using absl::random_internal::Randen;
using absl::random_internal::RandenHwAes;
using absl::random_internal::RandenSlow;
using absl::random_internal_nanobenchmark::FuncInput;
using absl::random_internal_nanobenchmark::FuncOutput;
using absl::random_internal_nanobenchmark::InvariantTicksPerSecond;
using absl::random_internal_nanobenchmark::MeasureClosure;
using absl::random_internal_nanobenchmark::Params;
using absl::random_internal_nanobenchmark::PinThreadToCPU;
using absl::random_internal_nanobenchmark::Result;
// Local state parameters.
static constexpr size_t kStateSizeT = Randen::kStateBytes / sizeof(uint64_t);
static constexpr size_t kSeedSizeT = Randen::kSeedBytes / sizeof(uint32_t);
// Randen implementation benchmarks.
template <typename T>
struct AbsorbFn : public T {
mutable uint64_t state[kStateSizeT] = {};
mutable uint32_t seed[kSeedSizeT] = {};
static constexpr size_t bytes() { return sizeof(seed); }
FuncOutput operator()(const FuncInput num_iters) const {
for (size_t i = 0; i < num_iters; ++i) {
this->Absorb(seed, state);
}
return state[0];
}
};
template <typename T>
struct GenerateFn : public T {
mutable uint64_t state[kStateSizeT];
GenerateFn() { std::memset(state, 0, sizeof(state)); }
static constexpr size_t bytes() { return sizeof(state); }
FuncOutput operator()(const FuncInput num_iters) const {
const auto* keys = this->GetKeys();
for (size_t i = 0; i < num_iters; ++i) {
this->Generate(keys, state);
}
return state[0];
}
};
template <typename UInt>
struct Engine {
mutable absl::random_internal::randen_engine<UInt> rng;
static constexpr size_t bytes() { return sizeof(UInt); }
FuncOutput operator()(const FuncInput num_iters) const {
for (size_t i = 0; i < num_iters - 1; ++i) {
rng();
}
return rng();
}
};
template <size_t N>
void Print(const char* name, const size_t n, const Result (&results)[N],
const size_t bytes) {
if (n == 0) {
ABSL_RAW_LOG(
WARNING,
"WARNING: Measurement failed, should not happen when using "
"PinThreadToCPU unless the region to measure takes > 1 second.\n");
return;
}
static const double ns_per_tick = 1e9 / InvariantTicksPerSecond();
static constexpr const double kNsPerS = 1e9; // ns/s
static constexpr const double kMBPerByte = 1.0 / 1048576.0; // Mb / b
static auto header = [] {
return printf("%20s %8s: %12s ticks; %9s (%9s) %8s\n", "Name", "Count",
"Total", "Variance", "Time", "bytes/s");
}();
(void)header;
for (size_t i = 0; i < n; ++i) {
const double ticks_per_call = results[i].ticks / results[i].input;
const double ns_per_call = ns_per_tick * ticks_per_call;
const double bytes_per_ns = bytes / ns_per_call;
const double mb_per_s = bytes_per_ns * kNsPerS * kMBPerByte;
// Output
printf("%20s %8zu: %12.2f ticks; MAD=%4.2f%% (%6.1f ns) %8.1f Mb/s\n",
name, results[i].input, results[i].ticks,
results[i].variability * 100.0, ns_per_call, mb_per_s);
}
}
// Fails here
template <typename Op, size_t N>
void Measure(const char* name, const FuncInput (&inputs)[N]) {
Op op;
Result results[N];
Params params;
params.verbose = false;
params.max_evals = 6; // avoid test timeout
const size_t num_results = MeasureClosure(op, inputs, N, results, params);
Print(name, num_results, results, op.bytes());
}
// unpredictable == 1 but the compiler does not know that.
void RunAll(const int argc, char* argv[]) {
if (argc == 2) {
int cpu = -1;
if (!absl::SimpleAtoi(argv[1], &cpu)) {
ABSL_RAW_LOG(FATAL, "The optional argument must be a CPU number >= 0.\n");
}
PinThreadToCPU(cpu);
}
// The compiler cannot reduce this to a constant.
const FuncInput unpredictable = (argc != 999);
static const FuncInput inputs[] = {unpredictable * 100, unpredictable * 1000};
#if !defined(ABSL_INTERNAL_DISABLE_AES) && ABSL_HAVE_ACCELERATED_AES
Measure<AbsorbFn<RandenHwAes>>("Absorb (HwAes)", inputs);
#endif
Measure<AbsorbFn<RandenSlow>>("Absorb (Slow)", inputs);
#if !defined(ABSL_INTERNAL_DISABLE_AES) && ABSL_HAVE_ACCELERATED_AES
Measure<GenerateFn<RandenHwAes>>("Generate (HwAes)", inputs);
#endif
Measure<GenerateFn<RandenSlow>>("Generate (Slow)", inputs);
// Measure the production engine.
static const FuncInput inputs1[] = {unpredictable * 1000,
unpredictable * 10000};
Measure<Engine<uint64_t>>("randen_engine<uint64_t>", inputs1);
Measure<Engine<uint32_t>>("randen_engine<uint32_t>", inputs1);
}
} // namespace
int main(int argc, char* argv[]) {
RunAll(argc, argv);
return 0;
}