test: use os.availableParallelism()

Refs: https://github.com/nodejs/node/pull/45895
PR-URL: https://github.com/nodejs/node/pull/46003
Reviewed-By: Moshe Atlow <moshe@atlow.co.il>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Yagiz Nizipli <yagiz@nizipli.com>

test/parallel/test-cluster-concurrent-disconnect.js

@@ -10,7 +10,7 @@ const os = require('os');
 
 if (cluster.isPrimary) {
   const workers = [];
-  const numCPUs = os.cpus().length;
+  const numCPUs = os.availableParallelism();
   let waitOnline = numCPUs;
   for (let i = 0; i < numCPUs; i++) {
     const worker = cluster.fork();

test/parallel/test-gc-http-client-connaborted.js

@@ -8,7 +8,7 @@ const onGC = require('../common/ongc');
 const http = require('http');
 const os = require('os');
 
-const cpus = os.cpus().length;
+const cpus = os.availableParallelism();
 let createClients = true;
 let done = 0;
 let count = 0;

test/parallel/test-gc-net-timeout.js

@@ -26,7 +26,7 @@ function serverHandler(sock) {
   }, 100);
 }
 
-const cpus = os.cpus().length;
+const cpus = os.availableParallelism();
 let createClients = true;
 let done = 0;
 let count = 0;

test/parallel/test-worker-memory.js

@@ -7,7 +7,7 @@ const assert = require('assert');
 const util = require('util');
 const { Worker } = require('worker_threads');
 
-let numWorkers = +process.env.JOBS || require('os').cpus().length;
+let numWorkers = +process.env.JOBS || require('os').availableParallelism();
 if (numWorkers > 20) {
   // Cap the number of workers at 20 (as an even divisor of 60 used as
   // the total number of workers started) otherwise the test fails on

test/pummel/test-policy-integrity-dep.js

@@ -22,7 +22,7 @@ const fs = require('fs');
 const path = require('path');
 const { pathToFileURL } = require('url');
 
-const cpus = require('os').cpus().length;
+const cpus = require('os').availableParallelism();
 
 function hash(algo, body) {
   const values = [];

test/pummel/test-policy-integrity-parent-commonjs.js

@@ -22,7 +22,7 @@ const fs = require('fs');
 const path = require('path');
 const { pathToFileURL } = require('url');
 
-const cpus = require('os').cpus().length;
+const cpus = require('os').availableParallelism();
 
 function hash(algo, body) {
   const values = [];

test/pummel/test-policy-integrity-parent-module.js

@@ -22,7 +22,7 @@ const fs = require('fs');
 const path = require('path');
 const { pathToFileURL } = require('url');
 
-const cpus = require('os').cpus().length;
+const cpus = require('os').availableParallelism();
 
 function hash(algo, body) {
   const values = [];

test/pummel/test-policy-integrity-parent-no-package-json.js

@@ -22,7 +22,7 @@ const fs = require('fs');
 const path = require('path');
 const { pathToFileURL } = require('url');
 
-const cpus = require('os').cpus().length;
+const cpus = require('os').availableParallelism();
 
 function hash(algo, body) {
   const values = [];

test/pummel/test-policy-integrity-worker-commonjs.js

@@ -22,7 +22,7 @@ const fs = require('fs');
 const path = require('path');
 const { pathToFileURL } = require('url');
 
-const cpus = require('os').cpus().length;
+const cpus = require('os').availableParallelism();
 
 function hash(algo, body) {
   const values = [];

test/pummel/test-policy-integrity-worker-module.js

@@ -22,7 +22,7 @@ const fs = require('fs');
 const path = require('path');
 const { pathToFileURL } = require('url');
 
-const cpus = require('os').cpus().length;
+const cpus = require('os').availableParallelism();
 
 function hash(algo, body) {
   const values = [];

test/pummel/test-policy-integrity-worker-no-package-json.js

@@ -22,7 +22,7 @@ const fs = require('fs');
 const path = require('path');
 const { pathToFileURL } = require('url');
 
-const cpus = require('os').cpus().length;
+const cpus = require('os').availableParallelism();
 
 function hash(algo, body) {
   const values = [];

test/sequential/test-gc-http-client-onerror.js

@@ -6,7 +6,7 @@
 const common = require('../common');
 const onGC = require('../common/ongc');
 
-const cpus = require('os').cpus().length;
+const cpus = require('os').availableParallelism();
 
 function serverHandler(req, res) {
   req.resume();

test/sequential/test-gc-http-client-timeout.js

@@ -16,7 +16,7 @@ function serverHandler(req, res) {
   }, 100);
 }
 
-const cpus = os.cpus().length;
+const cpus = os.availableParallelism();
 const numRequests = 36;
 let createClients = true;
 let done = 0;

test/sequential/test-gc-http-client.js

@@ -5,7 +5,7 @@
 const common = require('../common');
 const onGC = require('../common/ongc');
 
-const cpus = require('os').cpus().length;
+const cpus = require('os').availableParallelism();
 
 function serverHandler(req, res) {
   res.writeHead(200, { 'Content-Type': 'text/plain' });