From 147f0df58e1ff4973bffb7e4628e6b2fdc20eb57 Mon Sep 17 00:00:00 2001
From: Douglas Rumbaugh <dbr4@psu.edu>
Date: Fri, 22 Mar 2024 14:04:40 -0400
Subject: FSTrie testing and debugging

---
 benchmarks/string_insertion_tput.cpp |  92 ++++++++++++++++++++++++++
 include/shard/FSTrie.h               | 121 ++++++-----------------------------
 tests/include/shard_string.h         |   8 +--
 tests/include/testing.h              |   6 +-
 4 files changed, 118 insertions(+), 109 deletions(-)
 create mode 100644 benchmarks/string_insertion_tput.cpp

diff --git a/benchmarks/string_insertion_tput.cpp b/benchmarks/string_insertion_tput.cpp
new file mode 100644
index 0000000..d205175
--- /dev/null
+++ b/benchmarks/string_insertion_tput.cpp
@@ -0,0 +1,92 @@
+/*
+ *
+ */
+
+#define ENABLE_TIMER
+
+#include <fstream>
+#include <sstream>
+
+#include "framework/DynamicExtension.h"
+#include "shard/FSTrie.h"
+#include "query/rangequery.h"
+#include "framework/interface/Record.h"
+
+#include "psu-util/timer.h"
+#include "psu-util/progress.h"
+
+
+typedef de::Record<std::string, uint64_t> Rec;
+typedef de::FSTrie<Rec> Trie;
+typedef de::rq::Query<Rec, Trie> Q;
+typedef de::DynamicExtension<Rec, Trie, Q> Ext; //, de::LayoutPolicy::TEIRING, de::DeletePolicy::TAGGING, de::SerialScheduler> Ext;
+
+std::vector<std::string> strings;
+
+void insert_thread(int64_t start, int64_t end, Ext *extension) {
+    for (uint64_t i=start; i<end; i++) {
+            Rec r = {strings[i], i};
+            while (!extension->insert(r)) {
+                _mm_pause();
+            }
+    }
+}
+
+void read_data(std::string fname, size_t n=10000000) {
+    strings.reserve(n);
+
+    std::fstream file;
+    file.open(fname, std::ios::in);
+
+    size_t i=0;
+    std::string line;
+    while (i < n && std::getline(file, line, '\n')) {
+        strings.emplace_back(line);
+        i++;
+        psudb::progress_update((double) i / (double) n, "Reading file:");
+    }
+}
+
+int main(int argc, char **argv) {
+    size_t n = 100000000;
+
+    std::vector<int> counts = {1 , 2, 4, 8}; //, 16, 32, 64};
+    //
+    read_data("benchmarks/data/ursa-genome.txt", n);
+
+    fprintf(stderr, "Finished reading from file.\n");
+
+    for (auto thread_count : counts) {
+
+        auto extension = new Ext(1000, 12000, 8);
+
+        size_t per_thread = n / thread_count;
+
+        std::thread threads[thread_count];
+
+        TIMER_INIT();
+        TIMER_START();
+        for (size_t i=0; i<thread_count; i++) {
+            threads[i] = std::thread(insert_thread, i*per_thread, 
+                                     i*per_thread+per_thread, extension);
+        }
+
+        for (size_t i=0; i<thread_count; i++) {
+            threads[i].join();
+        }
+
+        TIMER_STOP();
+
+        auto total_time = TIMER_RESULT();
+
+        double tput = (double) n / (double) total_time * 1e9;
+
+        fprintf(stdout, "%ld\t%d\t%lf\n", extension->get_record_count(), 
+                thread_count, tput);
+
+        delete extension;
+    }
+
+    fflush(stderr);
+}
+
diff --git a/include/shard/FSTrie.h b/include/shard/FSTrie.h
index 62aa0b7..aa3c9f4 100644
--- a/include/shard/FSTrie.h
+++ b/include/shard/FSTrie.h
@@ -1,13 +1,11 @@
 /*
  * include/shard/FSTrie.h
  *
- * Copyright (C) 2023 Douglas B. Rumbaugh <drumbaugh@psu.edu>
+ * Copyright (C) 2024 Douglas B. Rumbaugh <drumbaugh@psu.edu>
  *
  * Distributed under the Modified BSD License.
  *
  * A shard shim around the FSTrie learned index.
- *
- * TODO: The code in this file is very poorly commented.
  */
 #pragma once
 
@@ -15,9 +13,7 @@
 #include <vector>
 
 #include "framework/ShardRequirements.h"
-#include "FST.hpp"
-#include "psu-ds/BloomFilter.h"
-#include "util/bf_config.h"
+#include "fst.hpp"
 #include "util/SortedMerge.h"
 
 using psudb::CACHELINE_SIZE;
@@ -28,14 +24,13 @@ using psudb::byte;
 
 namespace de {
 
-template <KVPInterface R, size_t E=1024>
+template <KVPInterface R>
 class FSTrie {
 private:
+
     typedef decltype(R::key) K;
     typedef decltype(R::value) V;
-
-    static_assert(std::is_same_v<K, std::string> || std::is_same_v<K, uint64_t>, 
-    "FST requires either string or uint64_t keys");
+    static_assert(std::is_same_v<K, std::string>, "FST requires std::string keys.");
 
 public:
     FSTrie(BufferView<R> buffer)
@@ -50,22 +45,12 @@ public:
         std::vector<K> keys;
         keys.reserve(buffer.get_record_count());
 
-        std::vector<size_t> values;
-        values.reserve(buffer.get_record_count());
-
-        size_t longest_key = 0;
-
         /*
          * Copy the contents of the buffer view into a temporary buffer, and
          * sort them. We still need to iterate over these temporary records to 
          * apply tombstone/deleted record filtering, as well as any possible
          * per-record processing that is required by the shard being built.
          */
-        /*
-        auto temp_buffer = (Wrapped<R> *) psudb::sf_aligned_calloc(CACHELINE_SIZE, 
-                                                                   buffer.get_record_count(), 
-                                                                   sizeof(Wrapped<R>));
-                                                                   */
         auto temp_buffer = new Wrapped<R>[buffer.get_record_count()]();
         for (size_t i=0; i<buffer.get_record_count(); i++) {
             temp_buffer[i] = *(buffer.get(i));
@@ -76,21 +61,14 @@ public:
         std::sort(base, stop, std::less<Wrapped<R>>());
 
         for (size_t i=0; i<buffer.get_record_count(); i++) {
-            if (temp_buffer[i].is_deleted()) {
+            if (temp_buffer[i].is_deleted() || !temp_buffer[i].is_visible()) {
                 continue;
             }
 
             m_data[cnt] = temp_buffer[i];
-            m_data[cnt].header = 0;
+            m_data[cnt].clear_timestamp();
 
             keys.push_back(m_data[cnt].rec.key);
-            values.push_back(cnt);
-            if constexpr (std::is_same_v<K, std::string>) {
-                if (m_data[cnt].rec.key.size() > longest_key) {
-                    longest_key = m_data[cnt].rec.key.size();
-                }
-            }
-
             cnt++;
         }
 
@@ -99,11 +77,8 @@ public:
         }
 
         m_reccnt = cnt;
-        m_fst = FST();
-        if constexpr (std::is_same_v<K, std::string>) {
-            m_fst.load(keys, values, longest_key);
-        } else {
-            m_fst.load(keys, values);
+        if (m_reccnt > 0) {
+            m_fst = new fst::Trie(keys);
         }
 
         delete[] temp_buffer;
@@ -124,10 +99,6 @@ public:
         std::vector<K> keys;
         keys.reserve(attemp_reccnt);
 
-        std::vector<size_t> values;
-        values.reserve(attemp_reccnt);
-
-        size_t longest_key = 0;
         // FIXME: For smaller cursor arrays, it may be more efficient to skip
         //        the priority queue and just do a scan.
         PriorityQueue<Wrapped<R>> pq(cursors.size());
@@ -155,16 +126,9 @@ public:
             } else {
                 auto& cursor = cursors[now.version];
                 /* skip over records that have been deleted via tagging */
-                if (!cursor.ptr->is_deleted()) {
+                if (!cursor.ptr->is_deleted() && cursor.ptr->rec.key != "") {
                     m_data[m_reccnt] = *cursor.ptr;
                     keys.push_back(m_data[m_reccnt].rec.key);
-                    values.push_back(m_data[m_reccnt].rec.value);
-
-                    if constexpr (std::is_same_v<K, std::string>) {
-                        if (m_data[m_reccnt].rec.key.size() > longest_key) {
-                            longest_key = m_data[m_reccnt].rec.key.size();
-                        }
-                    }
 
                     m_reccnt++;
                 }
@@ -179,37 +143,24 @@ public:
         }
 
         if (m_reccnt > 0) {
-            m_fst = FST();
-            if constexpr (std::is_same_v<K, std::string>) {
-                m_fst.load(keys, values, longest_key);
-            } else {
-                m_fst.load(keys, values);
-            }
+            m_fst = new fst::Trie(keys);
         }
     }
 
     ~FSTrie() {
         delete[] m_data;
+        delete m_fst;
     }
 
     Wrapped<R> *point_lookup(const R &rec, bool filter=false) {
-        size_t idx;
-        bool res; 
-        if constexpr (std::is_same_v<K, std::string>) {
-            res = m_fst.lookup((uint8_t*)rec.key.c_str(), rec.key.size(), idx);
-        } else {
-            res = m_fst.lookup(rec.key, idx);
-        }
 
-        if (res && m_data[idx].rec.key != rec.key) {
-            fprintf(stderr, "ERROR!\n");
-        }
+        auto idx = m_fst->exactSearch(rec.key);
 
-        if (res) {
-            return m_data + idx;
+        if (idx == fst::kNotFound) {
+            return nullptr;
         }
 
-        return nullptr;
+        return m_data + idx;
     }
 
     Wrapped<R>* get_data() const {
@@ -231,53 +182,21 @@ public:
 
 
     size_t get_memory_usage() {
-        return m_fst.mem() + m_alloc_size;
+        return m_fst->getMemoryUsage() + m_alloc_size;
     }
 
     size_t get_aux_memory_usage() {
         return 0;
     }
 
-    size_t get_lower_bound(const K& key) {
-        auto itr = FSTIter();
-
-        const K temp_key = key;
-
-        bool res;
-        if constexpr (std::is_same_v<K, std::string>) {
-           res = m_fst.lowerBound(temp_key.c_str(), key.size(), itr); 
-        } else {
-           res = m_fst.lowerBound(temp_key, itr); 
-        }
-
-        return itr.value();
-    }
-
-    size_t get_upper_bound(const K& key) {
-        auto itr = FSTIter();
-
-        const K temp_key = key;
-
-        bool res;
-        if constexpr (std::is_same_v<K, std::string>) {
-           res = m_fst.lowerBound(temp_key.c_str(), key.size(), itr); 
-        } else {
-           res = m_fst.lowerBound(temp_key, itr); 
-        }
-
-        size_t idx = itr.value();
-        while (idx < m_reccnt && m_data[idx].rec.key <= key) {
-            idx++;
-        }
-
-        return idx;
-    }
+    size_t get_lower_bound(R &rec) {return 0;}
+    size_t get_upper_bound(R &rec) {return 0;}
 
 private:
 
     Wrapped<R>* m_data;
     size_t m_reccnt;
     size_t m_alloc_size;
-    FST m_fst;
+    fst::Trie *m_fst;
 };
 }
diff --git a/tests/include/shard_string.h b/tests/include/shard_string.h
index 27ee782..fa51630 100644
--- a/tests/include/shard_string.h
+++ b/tests/include/shard_string.h
@@ -58,7 +58,7 @@ START_TEST(t_mbuffer_init)
 
 START_TEST(t_shard_init)
 {
-    size_t n = 512;
+    size_t n = 2048;
     auto mbuffer1 = create_test_mbuffer<R>(n);
     auto mbuffer2 = create_test_mbuffer<R>(n);
     auto mbuffer3 = create_test_mbuffer<R>(n);
@@ -117,16 +117,14 @@ START_TEST(t_point_lookup)
         auto view = buffer->get_buffer_view();
 
         for (size_t i=0; i<n; i++) {
-            R r;
             auto rec = view.get(i);
-            r.key = rec->rec.key;
-            r.value = rec->rec.value;
+            R r = rec->rec;
 
             auto result = shard.point_lookup(r);
             ck_assert_ptr_nonnull(result);
             ck_assert_str_eq(result->rec.key.c_str(), r.key.c_str());
             ck_assert_int_eq(result->rec.value, r.value);
-            fprintf(stderr, "%ld\n", i);
+            //fprintf(stderr, "%ld\n", i);
         }
     }
 
diff --git a/tests/include/testing.h b/tests/include/testing.h
index a3c54c0..2315daa 100644
--- a/tests/include/testing.h
+++ b/tests/include/testing.h
@@ -51,7 +51,7 @@ static std::vector<StringRec> read_string_data(std::string fname, size_t n) {
         r.value = atol(field.c_str());
         std::getline(ls, field, '\n');
         r.key = std::string(field);
-
+        
         vec.push_back(r);
     }
 
@@ -116,8 +116,8 @@ static de::MutableBuffer<R> *create_test_mbuffer(size_t cnt)
     auto buffer = new de::MutableBuffer<R>(cnt/2, cnt);
 
     R rec;
-    if constexpr (de::KVPInterface<R>) {
-        if constexpr (std::is_same_v<R, StringRec>) {
+    if constexpr (de::KVPInterface<R>){
+        if constexpr (std::is_same_v<decltype(R::key), std::string>) {
             auto records = read_string_data(kjv_wordlist, cnt);
             for (size_t i=0; i<cnt; i++) {
                 if constexpr (de::WeightedRecordInterface<R>) {
-- 
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