From ac5f574c8a5b9f5a7a631562a7da84fac1fbcbfc Mon Sep 17 00:00:00 2001
From: Douglas Rumbaugh <dbr4@psu.edu>
Date: Tue, 4 Feb 2025 17:48:43 -0500
Subject: VPTree buffer benchmark

---
 benchmarks/tail-latency/vptree_buffer.cpp | 69 +++++++++++++++++++++++++++++++
 1 file changed, 69 insertions(+)
 create mode 100644 benchmarks/tail-latency/vptree_buffer.cpp

(limited to 'benchmarks')

diff --git a/benchmarks/tail-latency/vptree_buffer.cpp b/benchmarks/tail-latency/vptree_buffer.cpp
new file mode 100644
index 0000000..8528e94
--- /dev/null
+++ b/benchmarks/tail-latency/vptree_buffer.cpp
@@ -0,0 +1,69 @@
+/*
+ *
+ */
+
+#define ENABLE_TIMER
+#define TS_TEST
+
+#include <thread>
+
+#include "file_util.h"
+#include "framework/interface/Record.h"
+#include "framework/structure/MutableBuffer.h"
+#include "shard/VPTree.h"
+#include "standard_benchmarks.h"
+
+#include "psu-util/timer.h"
+#include <gsl/gsl_rng.h>
+
+typedef Word2VecRec Rec;
+typedef de::VPTree<Rec, 100, true> Shard;
+typedef de::MutableBuffer<Rec> Buffer;
+
+void usage(char *progname) {
+  fprintf(stderr, "%s reccnt datafile\n", progname);
+}
+
+int main(int argc, char **argv) {
+
+  if (argc < 3) {
+    usage(argv[0]);
+    exit(EXIT_FAILURE);
+  }
+
+  size_t n = atol(argv[1]);
+  std::string d_fname = std::string(argv[2]);
+
+  auto data = read_vector_file<Rec, 300>(d_fname, n);
+
+  std::vector<size_t> buffer_sizes = {4000,  8000,  12000, 16000,
+                                      20000, 40000, 80000, 160000, 320000};
+
+  TIMER_INIT();
+
+  size_t rec_idx = 0;
+
+  for (size_t bs : buffer_sizes) {
+    for (size_t j = 0; j < 20; j++) {
+      auto buffer = Buffer(bs, bs);
+
+      TIMER_START();
+      for (size_t i = 0; i < bs; i++) {
+        buffer.append(data[rec_idx++]);
+
+        if (rec_idx >= n) rec_idx = 0;
+      }
+      TIMER_STOP();
+
+      auto buffer_fill = TIMER_RESULT();
+
+      TIMER_START();
+      auto shard = Shard(buffer.get_buffer_view());
+      TIMER_STOP();
+
+      auto shard_const = TIMER_RESULT();
+
+      fprintf(stdout, "%ld\t%ld\t%ld\n", bs, buffer_fill, shard_const);
+    }
+  }
+}
-- 
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