From aa5832f5e1bf7fcbd0a9507677a650b5e749ef46 Mon Sep 17 00:00:00 2001
From: Douglas Rumbaugh <dbr4@psu.edu>
Date: Wed, 7 Jun 2023 10:26:24 -0400
Subject: Sampling benchmark

---
 benchmarks/bench.h           | 206 +++++++++++++++++++++++++++++++++++++++++++
 benchmarks/sampling_tput.cpp | 157 +++++++++++++++++++++++++++++++++
 2 files changed, 363 insertions(+)
 create mode 100644 benchmarks/bench.h
 create mode 100644 benchmarks/sampling_tput.cpp

(limited to 'benchmarks')

diff --git a/benchmarks/bench.h b/benchmarks/bench.h
new file mode 100644
index 0000000..8af244a
--- /dev/null
+++ b/benchmarks/bench.h
@@ -0,0 +1,206 @@
+#ifndef H_BENCH
+#define H_BENCH
+#include "framework/DynamicExtension.h"
+#include "shard/WSS.h"
+
+#include <cstdlib>
+#include <cstdio>
+#include <chrono>
+#include <algorithm>
+#include <numeric>
+#include <memory>
+#include <iostream>
+#include <fstream>
+#include <sstream>
+#include <unordered_set>
+#include <set>
+#include <string>
+#include <random>
+
+typedef uint64_t key_type;
+typedef uint32_t value_type;
+typedef uint64_t weight_type;
+
+typedef de::WeightedRecord<key_type, value_type, weight_type> WRec;
+typedef de::DynamicExtension<WRec, de::WSS<WRec>, de::WSSQuery<WRec>> ExtendedWSS;
+
+static gsl_rng *g_rng;
+static std::set<WRec> *g_to_delete;
+static bool g_osm_data;
+
+static key_type g_min_key = UINT64_MAX;
+static key_type g_max_key = 0;
+
+static size_t g_max_record_cnt = 0;
+static size_t g_reccnt = 0;
+
+static constexpr unsigned int DEFAULT_SEED = 0;
+
+static unsigned int get_random_seed()
+{
+    unsigned int seed = 0;
+    std::fstream urandom;
+    urandom.open("/dev/urandom", std::ios::in|std::ios::binary);
+    urandom.read((char *) &seed, sizeof(seed));
+    urandom.close();
+
+    return seed;
+}
+
+static key_type osm_to_key(const char *key_field) {
+    double tmp_key = (atof(key_field) + 180) * 10e6;
+    return (key_type) tmp_key;
+}
+
+static void init_bench_rng(unsigned int seed, const gsl_rng_type *type) 
+{
+    g_rng = gsl_rng_alloc(type);
+    gsl_rng_set(g_rng, seed);
+}
+
+static void init_bench_env(size_t max_reccnt, bool random_seed, bool osm_correction=true)
+{
+    unsigned int seed = (random_seed) ? get_random_seed() : DEFAULT_SEED;
+    init_bench_rng(seed, gsl_rng_mt19937);
+    g_to_delete = new std::set<WRec>();
+    g_osm_data = osm_correction;
+    g_max_record_cnt = max_reccnt;
+    g_reccnt = 0;
+}
+
+static void delete_bench_env()
+{
+    gsl_rng_free(g_rng);
+    delete g_to_delete;
+}
+
+static bool next_record(std::fstream *file, WRec *record)
+{
+    if (g_reccnt >= g_max_record_cnt) return false;
+
+    std::string line;
+    if (std::getline(*file, line, '\n')) {
+        std::stringstream line_stream(line);
+        std::string key_field;
+        std::string value_field;
+        std::string weight_field;
+
+        std::getline(line_stream, value_field, '\t');
+        std::getline(line_stream, key_field, '\t');
+        std::getline(line_stream, weight_field, '\t');
+
+        record->key = (g_osm_data) ? osm_to_key(key_field.c_str()) : atol(key_field.c_str());
+        record->value = atol(value_field.c_str());
+        record->weight = atof(weight_field.c_str());
+
+        if (record->key < g_min_key) g_min_key = record->key;
+
+        if (record->key > g_max_key) g_max_key = record->key;
+
+        g_reccnt++;
+
+        return true;
+    }
+
+    return false;
+}
+
+static bool build_insert_vec(std::fstream *file, std::vector<WRec> &vec, size_t n) {
+    vec.clear();
+    for (size_t i=0; i<n; i++) {
+        WRec rec;
+        if (!next_record(file, &rec)) {
+            if (i == 0) {
+                return false;
+            }
+
+            break;
+        }
+
+        vec.emplace_back(rec);
+    }
+
+    return true;
+}
+
+/*
+ * helper routines for displaying progress bars to stderr
+ */
+static const char *g_prog_bar = "======================================================================";
+static const size_t g_prog_width = 50;
+
+static void progress_update(double percentage, std::string prompt) {
+    int val = (int) (percentage * 100);
+    int lpad = (int) (percentage * g_prog_width);
+    int rpad = (int) (g_prog_width - lpad);
+    fprintf(stderr, "\r(%3d%%) %20s [%.*s%*s]", val, prompt.c_str(), lpad, g_prog_bar, rpad, "");
+    fflush(stderr);   
+
+    if (percentage >= 1) fprintf(stderr, "\n");
+}
+
+static bool warmup(std::fstream *file, ExtendedWSS *extended_wss, size_t count, double delete_prop, bool progress=true)
+{
+    size_t del_buf_size = 10000;
+    size_t delete_idx = del_buf_size;
+
+    std::vector<WRec> delbuf;
+    std::set<WRec> deleted_keys;
+
+    de::wss_query_parms<WRec> parms;
+    parms.rng = g_rng;
+    parms.sample_size = del_buf_size;
+
+    size_t inserted = 0;
+    
+    double last_percent = 0;
+    for (size_t i=0; i<count; i++) {
+        WRec rec;
+        if (!next_record(file, &rec)) {
+            return false;
+        }
+
+        inserted++;
+        extended_wss->insert(rec);
+
+        if (i > extended_wss->get_buffer_capacity() && delete_idx >= delbuf.size()) {
+            extended_wss->query(&parms);
+            delete_idx = 0;
+            deleted_keys.clear();
+        }
+
+        if (i > extended_wss->get_buffer_capacity() && gsl_rng_uniform(g_rng) < delete_prop) {
+            auto rec = delbuf[delete_idx];
+            delete_idx++;
+
+            if (deleted_keys.find(rec) == deleted_keys.end()) {
+                extended_wss->erase(rec);
+                deleted_keys.insert(rec);
+            }
+        }
+
+        if (progress && ((double) i / (double) count) - last_percent > .01) {
+            progress_update((double) i / (double) count, "warming up:");
+            last_percent = (double) i / (double) count;
+        }
+    }
+
+    if (progress) {
+        progress_update(1, "warming up:");
+    }
+
+    return true;
+}
+
+
+static void reset_de_perf_metrics() {
+
+    /*
+     * rejection counters are zeroed automatically by the
+     * sampling function itself.
+     */
+
+    RESET_IO_CNT(); 
+}
+
+#endif // H_BENCH
diff --git a/benchmarks/sampling_tput.cpp b/benchmarks/sampling_tput.cpp
new file mode 100644
index 0000000..3eb72dc
--- /dev/null
+++ b/benchmarks/sampling_tput.cpp
@@ -0,0 +1,157 @@
+#include "bench.h"
+
+size_t g_insert_batch_size = 1000;
+
+static bool insert_benchmark(ExtendedWSS *tree, std::fstream *file, 
+                      size_t insert_cnt, double delete_prop) {
+
+    size_t delete_cnt = insert_cnt * delete_prop;
+    size_t delete_batch_size = g_insert_batch_size * delete_prop * 15;
+    size_t delete_idx = delete_batch_size;
+
+    std::vector<WRec> delbuf;
+
+    std::set<WRec> deleted;
+
+    size_t applied_deletes = 0;
+    size_t applied_inserts = 0;
+
+    std::vector<WRec> insert_vec;
+    insert_vec.reserve(g_insert_batch_size);
+    bool continue_benchmark = true;
+
+    size_t total_time = 0;
+
+    de::wss_query_parms<WRec> parms;
+    parms.rng = g_rng;
+    parms.sample_size = delete_batch_size;
+
+    while (applied_inserts < insert_cnt && continue_benchmark) { 
+        continue_benchmark = build_insert_vec(file, insert_vec, g_insert_batch_size);
+
+        if (insert_vec.size() == 0) {
+            break;
+        }
+
+        // if we've fully processed the delete vector, sample a new
+        // set of records to delete.
+        if (delete_idx >= delbuf.size()) {
+            delbuf = tree->query(&parms);
+            deleted.clear();
+            delete_idx = 0;
+        }
+
+        progress_update((double) applied_inserts / (double) insert_cnt, "inserting:");
+        size_t local_inserted = 0;
+        size_t local_deleted = 0;
+        
+        auto insert_start = std::chrono::high_resolution_clock::now();
+        for (size_t i=0; i<insert_vec.size(); i++) {
+            // process a delete if necessary
+            if (applied_deletes < delete_cnt && delete_idx < delete_batch_size && gsl_rng_uniform(g_rng) < delete_prop) {
+                auto rec = delbuf[delete_idx];
+                delete_idx++;
+
+                if (deleted.find(rec) == deleted.end()) {
+                    tree->erase(rec);
+                    deleted.insert(rec);
+                    local_deleted++;
+                } 
+            }
+
+            // insert the record;
+            tree->insert(insert_vec[i]);
+            local_inserted++;
+        }
+        auto insert_stop = std::chrono::high_resolution_clock::now();
+
+        applied_deletes += local_deleted;
+        applied_inserts += local_inserted;
+        total_time += std::chrono::duration_cast<std::chrono::nanoseconds>(insert_stop - insert_start).count();
+    } 
+
+    progress_update(1.0, "inserting:");
+    size_t throughput = (((double) (applied_inserts + applied_deletes) / (double) total_time) * 1e9);
+
+    fprintf(stdout, "%ld\t", throughput);
+    reset_de_perf_metrics();
+
+    return continue_benchmark;
+}
+
+
+static void sample_benchmark(ExtendedWSS *tree, size_t k, size_t trial_cnt)
+{
+    char progbuf[25];
+    sprintf(progbuf, "sampling (%ld):", k);
+
+    size_t batch_size = 100;
+    size_t batches = trial_cnt / batch_size;
+    size_t total_time = 0;
+
+    WRec sample_set[k];
+
+    de::wss_query_parms<WRec> parms;
+    parms.rng = g_rng;
+    parms.sample_size = k;
+
+    for (int i=0; i<batches; i++) {
+        progress_update((double) (i * batch_size) / (double) trial_cnt, progbuf);
+        auto start = std::chrono::high_resolution_clock::now();
+        for (int j=0; j < batch_size; j++) {
+            auto res = tree->query(&parms);
+        }
+        auto stop = std::chrono::high_resolution_clock::now();
+
+        total_time += std::chrono::duration_cast<std::chrono::nanoseconds>(stop - start).count();
+    }
+
+    progress_update(1.0, progbuf);
+
+    size_t throughput = (((double)(trial_cnt * k) / (double) total_time) * 1e9);
+
+    fprintf(stdout, "%ld\n", throughput);
+    fflush(stdout);
+}
+
+
+int main(int argc, char **argv)
+{
+    if (argc < 7) {
+        fprintf(stderr, "Usage: sampling_tput <filename> <record_count> <buffer_cap> <scale_factor> <delete_proportion> <max_delete_proportion> [osm_data]\n");
+        exit(EXIT_FAILURE);
+    }
+
+    std::string filename = std::string(argv[1]);
+    size_t record_count = atol(argv[2]);
+    size_t buffer_cap = atol(argv[3]);
+    size_t scale_factor = atol(argv[4]);
+    double delete_prop = atof(argv[5]);
+    double max_delete_prop = atof(argv[6]);
+    bool use_osm = (argc == 8) ? atoi(argv[7]) : 0;
+
+    double insert_batch = 0.1; 
+
+    init_bench_env(record_count, true, use_osm);
+
+    auto sampling_lsm = ExtendedWSS(buffer_cap, scale_factor, max_delete_prop);
+
+    std::fstream datafile;
+    datafile.open(filename, std::ios::in);
+
+    // warm up the tree with initial_insertions number of initially inserted
+    // records
+    size_t warmup_cnt = insert_batch * record_count;
+    warmup(&datafile, &sampling_lsm, warmup_cnt, delete_prop);
+
+    size_t insert_cnt = record_count - warmup_cnt;
+
+    insert_benchmark(&sampling_lsm, &datafile, insert_cnt, delete_prop);
+    sample_benchmark(&sampling_lsm, 1000, 10000);
+
+    delete_bench_env();
+    fflush(stdout);
+    fflush(stderr);
+
+    exit(EXIT_SUCCESS);
+}
-- 
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