From 43a97878ce14b72f0981164f87f2e35e14151312 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sun, 7 Apr 2024 11:22:09 +0200
Subject: Adding upstream version 110.0.1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 .../intgemm/benchmarks/benchmark_quantizer.cc      | 74 ++++++++++++++++++++++
 1 file changed, 74 insertions(+)
 create mode 100644 third_party/intgemm/benchmarks/benchmark_quantizer.cc

(limited to 'third_party/intgemm/benchmarks/benchmark_quantizer.cc')

diff --git a/third_party/intgemm/benchmarks/benchmark_quantizer.cc b/third_party/intgemm/benchmarks/benchmark_quantizer.cc
new file mode 100644
index 0000000000..5235b1ea0d
--- /dev/null
+++ b/third_party/intgemm/benchmarks/benchmark_quantizer.cc
@@ -0,0 +1,74 @@
+#include "../intgemm/intgemm.h"
+#include "../intgemm/aligned.h"
+#include "../intgemm/ssse3_gemm.h"
+#include "../intgemm/avx2_gemm.h"
+#include "../intgemm/avx512_gemm.h"
+
+#include <chrono>
+#include <iomanip>
+#include <iostream>
+#include <random>
+#include <vector>
+
+namespace {
+
+float MaxAbsoluteBaseline(const float *begin, const float *end) {
+  auto res = std::minmax_element(begin, end);
+  return std::max(std::fabs(*res.first), std::fabs(*res.second));
+}
+
+void BenchmarkMaxAbsolute() {
+  std::mt19937 gen;
+  std::uniform_real_distribution<float> dist(0.f, 1.f);
+  gen.seed(45678);
+
+  intgemm::AlignedVector<float> v(4096 * 4096);
+  for (auto& it : v) {
+    it = dist(gen);
+  }
+
+  // Hopefully these don't get optimized out...
+  MaxAbsoluteBaseline(v.begin(), v.end());
+  auto start = std::chrono::steady_clock::now();
+  MaxAbsoluteBaseline(v.begin(), v.end());
+  double baseline = std::chrono::duration<double>(std::chrono::steady_clock::now() - start).count();
+  intgemm::MaxAbsolute(v.begin(), v.end());
+  start = std::chrono::steady_clock::now();
+  intgemm::MaxAbsolute(v.begin(), v.end());
+  double optimized = std::chrono::duration<double>(std::chrono::steady_clock::now() - start).count();
+  std::cout << "MaxAbsolute baseline = " << baseline << " optimized = " << optimized << " speedup = " << (optimized / baseline) << '\n';
+}
+
+template <class Backend> void QuantizerBench(const float *in, int8_t *out, intgemm::Index count) {
+  if (intgemm::kCPU < Backend::kUses) return;
+  Backend::Quantize(in, out, 1.0, count);
+  const std::size_t kTries = 60;
+  auto start = std::chrono::steady_clock::now();
+  for (std::size_t t = 0; t < kTries; ++t) {
+    Backend::Quantize(in, out, 1.0, count);
+  }
+  auto end = std::chrono::steady_clock::now();
+  double took = std::chrono::duration<double>(end - start).count() / kTries;
+  std::cout << std::setw(9) << count << ' ' << std::fixed << std::setw(9) << std::setprecision(7) << took << ' ' << Backend::kName << std::endl;
+}
+} // namespace
+
+int main() {
+  BenchmarkMaxAbsolute();
+  for (std::size_t count = 1; count < (1ULL<<30); count *= 2) {
+    intgemm::AlignedVector<float> in(count);
+    intgemm::AlignedVector<int8_t> out(count);
+    std::mt19937 gen;
+    std::uniform_real_distribution<float> dist(-129.0, 129.0);
+    for (float &element : in) {
+      element = dist(gen);
+    }
+    QuantizerBench<intgemm::SSSE3::Kernels8>(in.begin(), out.begin(), static_cast<intgemm::Index>(count));
+#ifdef INTGEMM_COMPILER_SUPPORTS_AVX2
+    QuantizerBench<intgemm::AVX2::Kernels8>(in.begin(), out.begin(), static_cast<intgemm::Index>(count));
+#endif
+#ifdef INTGEMM_COMPILER_SUPPORTS_AVX512BW
+    QuantizerBench<intgemm::AVX512BW::Kernels8>(in.begin(), out.begin(), static_cast<intgemm::Index>(count));
+#endif
+  }
+}
-- 
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