[ObsUX][Synthtrace] Remove pidusage for logging cpu usage (elastic#…

…204043)

## Summary

Removes `pidusage` in favour of just getting cpu usage stats from
`node:process` for logging purposes. Other than that, not sure the point
of logging this, but keeping it in case it serves some purpose.

Closes elastic#203983 

## How to test

Not sure, make sure CI doesn't break or something from its removal,
given it is only used for logging.

package.json

@@ -1635,7 +1635,6 @@
     "@types/pbf": "3.0.2",
     "@types/pdfmake": "^0.2.2",
     "@types/picomatch": "^2.3.0",
-    "@types/pidusage": "^2.0.2",
     "@types/pixelmatch": "^5.2.4",
     "@types/pngjs": "^6.0.5",
     "@types/prop-types": "^15.7.5",
@@ -1807,7 +1806,6 @@
     "p-reflect": "2.1.0",
     "peggy": "^1.2.0",
     "picomatch": "^2.3.1",
-    "pidusage": "^3.0.2",
     "pirates": "^4.0.1",
     "piscina": "^3.2.0",
     "pixelmatch": "^5.3.0",

packages/kbn-apm-synthtrace/src/cli/utils/synthtrace_worker.ts

@@ -9,7 +9,6 @@
 
 import { timerange } from '@kbn/apm-synthtrace-client';
 import { castArray } from 'lodash';
-import pidusage from 'pidusage';
 import { memoryUsage } from 'process';
 import { parentPort, workerData } from 'worker_threads';
 import { getApmEsClient } from './get_apm_es_client';
@@ -123,10 +122,16 @@ async function start() {
     return Math.round(value / 1024 ** 2).toString() + 'mb';
   }
 
+  let cpuUsage = process.cpuUsage();
+
   setInterval(async () => {
-    const stats = await pidusage(process.pid);
+    cpuUsage = process.cpuUsage(cpuUsage);
     const mem = memoryUsage();
-    logger.info(`cpu: ${stats.cpu}, memory: ${mb(mem.heapUsed)}/${mb(mem.heapTotal)}`);
+    logger.info(
+      `cpu time: (user: ${cpuUsage.user}µs, sys: ${cpuUsage.system}µs), memory: ${mb(
+        mem.heapUsed
+      )}/${mb(mem.heapTotal)}`
+    );
   }, 5000);
 
   await logger.perf('index_scenario', async () => {

yarn.lock

@@ -12097,11 +12097,6 @@
   resolved "https://registry.yarnpkg.com/@types/picomatch/-/picomatch-2.3.0.tgz#75db5e75a713c5a83d5b76780c3da84a82806003"
   integrity sha512-O397rnSS9iQI4OirieAtsDqvCj4+3eY1J+EPdNTKuHuRWIfUoGyzX294o8C4KJYaLqgSrd2o60c5EqCU8Zv02g==
 
-"@types/pidusage@^2.0.2":
-  version "2.0.2"
-  resolved "https://registry.yarnpkg.com/@types/pidusage/-/pidusage-2.0.2.tgz#3f8c4b19ba7ea438a733d093661e92b60e5f88ee"
-  integrity sha512-lHgpGZjXDfjggZDLkgp4zQTYkvXq4S7RxjBjrDcPe1MBU72hESWxubutx8+AM4QkJdRxAhrQyxSA6pzHKJKlsQ==
-
 "@types/pixelmatch@^5.2.4":
   version "5.2.4"
   resolved "https://registry.yarnpkg.com/@types/pixelmatch/-/pixelmatch-5.2.4.tgz#ca145cc5ede1388c71c68edf2d1f5190e5ddd0f6"
@@ -26284,13 +26279,6 @@ picomatch@^4.0.2:
   resolved "https://registry.yarnpkg.com/picomatch/-/picomatch-4.0.2.tgz#77c742931e8f3b8820946c76cd0c1f13730d1dab"
   integrity sha512-M7BAV6Rlcy5u+m6oPhAPFgJTzAioX/6B0DxyvDlo9l8+T3nLKbrczg2WLUyzd45L8RqfUMyGPzekbMvX2Ldkwg==
 
-pidusage@^3.0.2:
-  version "3.0.2"
-  resolved "https://registry.yarnpkg.com/pidusage/-/pidusage-3.0.2.tgz#6faa5402b2530b3af2cf93d13bcf202889724a53"
-  integrity sha512-g0VU+y08pKw5M8EZ2rIGiEBaB8wrQMjYGFfW2QVIfyT8V+fq8YFLkvlz4bz5ljvFDJYNFCWT3PWqcRr2FKO81w==
-  dependencies:
-    safe-buffer "^5.2.1"
-
 pify@^2.0.0, pify@^2.2.0:
   version "2.3.0"
   resolved "https://registry.yarnpkg.com/pify/-/pify-2.3.0.tgz#ed141a6ac043a849ea588498e7dca8b15330e90c"