[DI] Add Sirun benchmark for Dynamic Instrumentation

benchmark/sirun/debugger/README.md

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+# Dynamic Instrumentation Benchmarks
+
+Benchmark the overhead on the instrumented application of different probe configurations.

benchmark/sirun/debugger/app.js

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+'use strict'
+
+// WARNING: CHANGES TO THIS FUNCTION WILL AFFECT THE LINE NUMBERS OF THE BREAKPOINTS
+
+if (process.env.DD_DYNAMIC_INSTRUMENTATION_ENABLED === 'true') {
+  require('./start-devtools-client')
+}
+
+let n = 0
+
+// Give the devtools client time to connect before doing work
+setTimeout(doSomeWork, 250)
+
+function doSomeWork (arg1 = 1, arg2 = 2) {
+  const data = getSomeData()
+  data.n = n
+  if (++n <= 1000) {
+    setTimeout(doSomeWork, 1)
+  }
+}
+
+// Location to put dummy breakpoint that is never hit:
+// eslint-disable-next-line no-unused-vars
+function dummy () {
+  throw new Error('This line should never execute')
+}
+
+function getSomeData () {
+  const str = 'a'.repeat(1000)
+  const arr = Array.from({ length: 1000 }, (_, i) => i)
+
+  const data = {
+    foo: 'bar',
+    nil: null,
+    undef: undefined,
+    bool: true
+  }
+  data.recursive = data
+
+  for (let i = 0; i < 20; i++) {
+    data[`str${i}`] = str
+    data[`arr${i}`] = arr
+  }
+
+  return data
+}

benchmark/sirun/debugger/meta.json

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+{
+  "name": "debugger",
+  "cachegrind": false,
+  "iterations": 20,
+  "instructions": true,
+  "variants": {
+    "control": {
+      "service": "while true; do { echo -e 'HTTP/1.1 202 Accepted\r\n\r\n'; } | nc -l 8080 > /dev/null; done",
+      "run": "node app.js",
+      "run_with_affinity": "bash -c \"taskset -c $CPU_AFFINITY node app.js\"",
+      "env": {
+        "DD_DYNAMIC_INSTRUMENTATION_ENABLED": "false"
+      }
+    },
+    "enabled-but-breakpoint-not-hit": {
+      "service": "while true; do { echo -e 'HTTP/1.1 202 Accepted\r\n\r\n'; } | nc -l 8080 > /dev/null; done",
+      "run": "node app.js",
+      "run_with_affinity": "bash -c \"taskset -c $CPU_AFFINITY node app.js\"",
+      "baseline": "control",
+      "env": {
+        "DD_DYNAMIC_INSTRUMENTATION_ENABLED": "true",
+        "BREAKPOINT_FILE": "app.js",
+        "BREAKPOINT_LINE": "25"
+      }
+    },
+    "line-probe-without-snapshot": {
+      "service": "while true; do { echo -e 'HTTP/1.1 202 Accepted\r\n\r\n'; } | nc -l 8080 > /dev/null; done",
+      "run": "node app.js",
+      "run_with_affinity": "bash -c \"taskset -c $CPU_AFFINITY node app.js\"",
+      "baseline": "control",
+      "env": {
+        "DD_DYNAMIC_INSTRUMENTATION_ENABLED": "true",
+        "BREAKPOINT_FILE": "app.js",
+        "BREAKPOINT_LINE": "18"
+      }
+    },
+    "line-probe-with-snapshot-default": {
+      "service": "while true; do { echo -e 'HTTP/1.1 202 Accepted\r\n\r\n'; } | nc -l 8080 > /dev/null; done",
+      "run": "node app.js",
+      "run_with_affinity": "bash -c \"taskset -c $CPU_AFFINITY node app.js\"",
+      "baseline": "line-probe-without-snapshot",
+      "env": {
+        "DD_DYNAMIC_INSTRUMENTATION_ENABLED": "true",
+        "BREAKPOINT_FILE": "app.js",
+        "BREAKPOINT_LINE": "18",
+        "CAPTURE_SNAPSHOT": "true"
+      }
+    },
+    "line-probe-with-snapshot-minimal": {
+      "service": "while true; do { echo -e 'HTTP/1.1 202 Accepted\r\n\r\n'; } | nc -l 8080 > /dev/null; done",
+      "run": "node app.js",
+      "run_with_affinity": "bash -c \"taskset -c $CPU_AFFINITY node app.js\"",
+      "baseline": "line-probe-without-snapshot",
+      "env": {
+        "DD_DYNAMIC_INSTRUMENTATION_ENABLED": "true",
+        "BREAKPOINT_FILE": "app.js",
+        "BREAKPOINT_LINE": "18",
+        "CAPTURE_SNAPSHOT": "true",
+        "MAX_REFERENCE_DEPTH": "0",
+        "MAX_COLLECTION_SIZE": "0",
+        "MAX_FIELD_COUNT": "0",
+        "MAX_LENGTH": "9007199254740991"
+      }
+    }
+  }
+}

benchmark/sirun/debugger/start-devtools-client.js

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+'use strict'
+
+const Config = require('../../../packages/dd-trace/src/config')
+const { start } = require('../../../packages/dd-trace/src/debugger')
+const { generateProbeConfig } = require('../../../packages/dd-trace/test/debugger/devtools_client/utils')
+
+const breakpoint = {
+  file: process.env.BREAKPOINT_FILE,
+  line: process.env.BREAKPOINT_LINE
+}
+const config = new Config()
+const rc = {
+  setProductHandler (product, cb) {
+    const action = 'apply'
+    const conf = generateProbeConfig(breakpoint, {
+      captureSnapshot: process.env.CAPTURE_SNAPSHOT === 'true',
+      capture: {
+        maxReferenceDepth: process.env.MAX_REFERENCE_DEPTH ? parseInt(process.env.MAX_REFERENCE_DEPTH, 10) : undefined,
+        maxCollectionSize: process.env.MAX_COLLECTION_SIZE ? parseInt(process.env.MAX_COLLECTION_SIZE, 10) : undefined,
+        maxFieldCount: process.env.MAX_FIELD_COUNT ? parseInt(process.env.MAX_FIELD_COUNT, 10) : undefined,
+        maxLength: process.env.MAX_LENGTH ? parseInt(process.env.MAX_LENGTH, 10) : undefined
+      }
+    })
+    const id = 'id'
+    const ack = () => {}
+
+    cb(action, conf, id, ack)
+  }
+}
+
+start(config, rc)