From 0a9e79416df03a9e0a3d2cf171cf90028a644d6d Mon Sep 17 00:00:00 2001
From: "Douglas B. Rumbaugh" <doug@douglasrumbaugh.com>
Date: Mon, 15 Jan 2024 17:21:11 -0500
Subject: Benchmarking programs

---
 benchmarks/reconstruction_interference.cpp | 110 +++++++++++++++++++++++++++++
 1 file changed, 110 insertions(+)
 create mode 100644 benchmarks/reconstruction_interference.cpp

(limited to 'benchmarks/reconstruction_interference.cpp')

diff --git a/benchmarks/reconstruction_interference.cpp b/benchmarks/reconstruction_interference.cpp
new file mode 100644
index 0000000..a843c71
--- /dev/null
+++ b/benchmarks/reconstruction_interference.cpp
@@ -0,0 +1,110 @@
+/*
+ *
+ */
+
+#define ENABLE_TIMER
+
+#include <thread>
+
+#include "framework/DynamicExtension.h"
+#include "shard/ISAMTree.h"
+#include "query/rangequery.h"
+#include "framework/interface/Record.h"
+
+#include "psu-util/timer.h"
+
+
+typedef de::Record<int64_t, int64_t> Rec;
+typedef de::ISAMTree<Rec> ISAM;
+typedef de::rq::Query<ISAM, Rec> Q;
+typedef de::DynamicExtension<Rec, ISAM, Q> Ext;
+
+void query_thread(Ext *extension, double selectivity, size_t k) {
+    TIMER_INIT();
+
+    size_t reccnt = extension->get_record_count();
+    size_t range = reccnt * selectivity;
+
+    auto q = new de::rq::Parms<Rec>();
+
+    TIMER_START();
+    for (int64_t i=0; i<k; i++) {
+        size_t start = rand() % (reccnt - range);
+        q->lower_bound = start;
+        q->upper_bound = start + range;
+        auto res = extension->query(q);
+        auto r = res.get();
+    }
+    TIMER_STOP();
+    auto query_lat = TIMER_RESULT();
+    fprintf(stdout, "Q\t%ld\t%ld\t%ld\n", reccnt, query_lat, k);
+    delete q;
+}
+
+Ext *build_structure(size_t n) {
+    auto extension = new Ext(1000, 10000, 2);
+
+    size_t i=0;
+    Rec r;
+    do {
+        r.key = rand() % n;
+        r.value = i;
+        if (extension->insert(r)) {
+            i++;
+        } else {
+            _mm_pause();
+        }
+    } while (i < n);
+
+    extension->await_next_epoch();
+    return extension;
+}
+
+void query_benchmark(double selectivity, size_t k, Ext *extension) {
+    TIMER_INIT();
+
+    size_t query_thrd_cnt = 4;
+    std::vector<std::thread> thrds(query_thrd_cnt);
+
+    TIMER_START();
+    for (size_t i=0; i<query_thrd_cnt; i++) {
+        thrds[i] = std::thread(query_thread, extension, selectivity, k);
+    }
+
+    for (size_t i=0; i<query_thrd_cnt; i++) {
+       thrds[i].join(); 
+    }
+    TIMER_STOP();
+
+    auto query_lat = TIMER_RESULT();
+    fprintf(stdout, "Q\t%ld\t%ld\t%ld\t%ld\n", extension->get_record_count(), query_lat, k, query_thrd_cnt);
+}
+
+int main(int argc, char **argv) {
+
+    /* the closeout routine takes _forever_ ... so we'll just leak the memory */
+    size_t n = 10000000;
+
+    size_t per_trial = 1000;
+    double selectivity = .001;
+
+    /* build initial structure */
+    auto extension = build_structure(n);
+
+    /* benchmark queries w/o any interference from reconstructions */
+    query_benchmark(selectivity, per_trial, extension);
+
+    fprintf(stderr, "Running interference test...\n");
+
+    /* trigger a worst-case reconstruction and benchmark the queries */
+    std::thread q_thrd(query_benchmark, selectivity, per_trial, extension);
+    auto s = extension->create_static_structure();
+    fprintf(stderr, "Construction complete\n");
+    q_thrd.join();
+    
+    delete extension;
+    delete s;
+
+    fflush(stderr);
+}
+
-- 
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