fix: re-enable linux perf listener for walltime

It was removed as a test and mistakenly not restored.

Author: GuillaumeLagrange

.github/workflows/codspeed.yml

@@ -86,8 +86,6 @@ jobs:
           CODSPEED_WALLTIME_PROFILER: samply
         with:
           mode: walltime
-          # TODO: Remove this once runner is released
-          runner-version: v4.17.7-alpha.2
           run: |
             pnpm turbo run bench --filter=@codspeed/tinybench-plugin
             pnpm turbo run bench --filter=@codspeed/vitest-plugin

packages/core/src/index.ts

@@ -57,9 +57,7 @@ export const setupCore = () => {
 
   native_core.InstrumentHooks.setIntegration("codspeed-node", __VERSION__);
   // In walltime, we use node's native profiling options rather than our own, cf `getV8Flags`
-  if (getCodspeedRunnerMode() !== "walltime") {
-    linuxPerf.start();
-  }
+  linuxPerf.start();
   checkV8Flags();
 
   // Collect Node.js runtime environment to detect changes that could
@@ -71,9 +69,7 @@ export const setupCore = () => {
 };
 
 export const teardownCore = () => {
-  if (getCodspeedRunnerMode() !== "walltime") {
-    linuxPerf.stop();
-  }
+  linuxPerf.stop();
 };
 
 export type {