streamkm/mem.html at main · mamodev/streamkm · GitHub

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<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8" />
    <title>CSV with IndexedDB Persistence</title>

    <style>
      body {
        font-family: Arial, sans-serif;
        margin: 0;
        padding: 0px;
      }
      .flex-row {
        display: flex;
        align-items: center;
        gap: 10px;
      }

      #dataCanvas {
        border: 1px solid #ccc;
        margin-top: 20px;
      }
    </style>
  </head>
  <body>
    <div class="flex-row">
      <h1>CSV IndexedDB Loader</h1>
      <input type="file" id="csvFile" accept=".csv" />
      <button id="clearDB">Clear DB</button>
    </div>

    <div>
      <canvas
        id="dataCanvas"
        width="800"
        height="400"
        style="border: 1px solid #000000"
      ></canvas>
    </div>

    <script>
      // ---------------------
      // CSV Parser
      // ---------------------
      function csvToJson(csv) {
        const [headerLine, ...lines] = csv.trim().split("\n");
        const headers = headerLine.split(",");
        return lines.map((line) => {
          const values = line.split(",");
          return Object.fromEntries(headers.map((h, i) => [h, values[i]]));
        });
      }

      // ---------------------
      // IndexedDB Helpers
      // ---------------------
      const DB_NAME = "csvDB";
      const STORE_NAME = "files";

      function openDB(callback) {
        const request = indexedDB.open(DB_NAME, 1);
        request.onupgradeneeded = (e) => {
          const db = e.target.result;
          if (!db.objectStoreNames.contains(STORE_NAME)) {
            db.createObjectStore(STORE_NAME);
          }
        };
        request.onsuccess = (e) => callback(e.target.result);
        request.onerror = (e) => console.error("DB open error", e);
      }

      function saveToDB(key, value) {
        openDB((db) => {
          const tx = db.transaction(STORE_NAME, "readwrite");
          tx.objectStore(STORE_NAME).put(value, key);
          tx.oncomplete = () => console.log("Saved to DB");
        });
      }

      function loadFromDB(key, callback) {
        openDB((db) => {
          const tx = db.transaction(STORE_NAME, "readonly");
          const req = tx.objectStore(STORE_NAME).get(key);
          req.onsuccess = (e) => callback(e.target.result);
        });
      }

      function clearDB() {
        openDB((db) => {
          const tx = db.transaction(STORE_NAME, "readwrite");
          tx.objectStore(STORE_NAME).clear();
          tx.oncomplete = () => {
            console.log("DB cleared");
          };
        });
      }

      class MemBlock {
        constructor(
          name,
          capacityBytes,
          color,
          nextLevel = null,
          lineSize = 64
        ) {
          this.name = name;
          this.capacityBytes = capacityBytes; // bytes
          this.lineSize = lineSize; // bytes per block/line
          this.color = color;
          this.nextLevel = nextLevel;

          this.maxLines = Math.floor(capacityBytes / lineSize);
          this.cache = new Set(); // stores line IDs
          this.onHit = (offs, size) => {};
          this.onMiss = (offs, size) => {};
        }

        // Convert address range [offs..offs+size) into cache line IDs
        _getLineIds(offsBytes, sizeBytes) {
          let ids = [];
          let start = Math.floor(offsBytes / this.lineSize);
          let end = Math.floor((offsBytes + sizeBytes - 1) / this.lineSize);
          for (let i = start; i <= end; i++) ids.push(i);
          return ids;
        }

        insert(offsBytes, sizeBytes) {
          const ids = this._getLineIds(offsBytes, sizeBytes);

          for (let id of ids) {
            if (this.cache.has(id)) {
              // ✅ Cache hit
              this.onHit(offsBytes, sizeBytes, this.name);
            } else {
              // ❌ Cache miss → fetch this *line* from lower level
              if (this.nextLevel) {
                const nextAddr = id * this.lineSize;
                this.nextLevel.insert(nextAddr, this.lineSize);
              }
              this.onMiss(offsBytes, sizeBytes, this.name);

              // Insert new line, evict if full
              if (this.cache.size >= this.maxLines) {
                const first = this.cache.values().next().value;
                this.cache.delete(first);
              }
              this.cache.add(id);
            }
          }
        }
      }

      async function render_data(data) {
        // create a canvas and draw something simple
        const canvas = document.getElementById("dataCanvas");
        // set width to page width
        canvas.width = window.innerWidth;
        canvas.height = 400;

        const DATA_ARR_Y_OFFSET = 0;
        const DATA_ARR_HEIGHT = 40;
        const MEM_H_Y_OFFSET = 50;

        const ctx = canvas.getContext("2d");

        let ram = new MemBlock("RAM", Infinity, "#a0c4ff", null); // practically unbounded
        let l3 = new MemBlock("L3", 8 * 1024 * 1024, "#bdb2ff", ram); // 8MB
        let l2 = new MemBlock("L2", 256 * 1024, "#ffc6ff", l3); // 256KB
        let l1 = new MemBlock("L1", 32 * 1024, "#fffffc", l2); // 32KB


        // create array bars for each cluster (the color is based on where it is in memory, default ram)
        ctx.fillStyle = ram.color;
        const bar_width = canvas.width;
        const bar_height = DATA_ARR_HEIGHT;
        ctx.fillRect(0, DATA_ARR_Y_OFFSET, bar_width, bar_height);

        // write in flexbox style memory hierarchy to canvas

        const hierarchy = [ram, l3, l2, l1];
        const width_per_level = canvas.width / hierarchy.length;

        for (let i = 0; i < hierarchy.length; i++) {
          const mem = hierarchy[i];
          const x = i * width_per_level;
          const y = MEM_H_Y_OFFSET;
          const height = canvas.height;

          ctx.fillStyle = mem.color;
          ctx.fillRect(x, y, width_per_level, height);

          ctx.fillStyle = "#000";
          ctx.font = "16px Arial";
          ctx.fillText(
            `${mem.name} (${(mem.size / (1024 * 1024)).toFixed(1)} MB)`,
            x + 10,
            y + 30
          );

          mem.onHit = (offs, size, name) => {
            ctx.fillStyle = "green";
            ctx.fillRect(x + width_per_level - 10, y, 10, 10);
          };

          mem.onMiss = (offs, size, name) => {
            ctx.fillStyle = "red";
            ctx.fillRect(x + width_per_level - 10, y + 20, 10, 10);
          };
        }

        function clear_mem_status () {
          for (let i = 0; i < hierarchy.length; i++) {
            const mem = hierarchy[i];
            const x = i * width_per_level;
            const y = MEM_H_Y_OFFSET;
            ctx.fillStyle = mem.color;
            ctx.fillRect(x + width_per_level - 10, y, 10, 30);
          }
        }

        const total_node_size = data[0].node_size;
        const el_w = bar_width / total_node_size;

        for (let i = 0; i < data.length; i++) {
          const row = data[i];

          const stride = 8 * 4 + 4 + 2 * 8; // 8 floats + 1 float + 2 doubles
        //   l1.insert(row.node_offset * stride, row.node_size * stride);


          const x = row.node_offset * el_w;
          ctx.fillStyle = "red";
          ctx.fillRect(
            x,
            DATA_ARR_Y_OFFSET + bar_height,
            row.node_size * el_w,
            10
          );

        //   // Let's access memoy sequentially
        //   for (let j = 0; j < row.node_size; j++) {
        //     const offs = (row.node_offset + j) * stride;
        //     l1.insert(offs, stride);
        //     await new Promise((r) => setTimeout(r, 100)); // yield to UI thread
        //     clear_mem_status();
        //   }
            await new Promise((r) => setTimeout(r, 50)); // yield to UI thread


          ctx.fillStyle = "white";
          ctx.fillRect(x, DATA_ARR_Y_OFFSET + bar_height, bar_width, 10);
            clear_mem_status();
        }
      }

      // ---------------------
      // UI handlers
      // ---------------------
      document
        .getElementById("csvFile")
        .addEventListener("change", function (evt) {
          const file = evt.target.files[0];
          if (!file) return;
          const reader = new FileReader();
          reader.onload = (e) => {
            const csv = e.target.result;
            const json = csvToJson(csv);

            // save as JSON string to IndexedDB
            saveToDB("csvData", JSON.stringify(json));

            console.log("Stored rows:", json.length);

            // render data or do something with it
            render_data(json);
          };
          reader.readAsText(file);
        });

      document.getElementById("clearDB").addEventListener("click", clearDB);

      // On page load → auto reload from DB
      window.addEventListener("load", () => {
        loadFromDB("csvData", (val) => {
          if (val) {
            const json = JSON.parse(val);
            console.log("Loaded from DB:", json.length, "rows");
            render_data(json);
          }
        });
      });
    </script>
  </body>
</html>