Auto merge of #112049 - Kobzol:pgo-omit-benchmarks, r=<try>

[do not merge] CI experiments

Various CI experiments for try/dist builds.

r? `@ghost`

try-job: x86_64-gnu
try-job: `*llvm*`

Author: rust-bors[bot]

.github/workflows/ci.yml

@@ -50,7 +50,7 @@ jobs:
   # If you want to modify CI jobs, take a look at src/ci/github-actions/jobs.yml.
   calculate_matrix:
     name: Calculate job matrix
-    runs-on: ubuntu-24.04-arm
+    runs-on: ubuntu-24.04
     outputs:
       jobs: ${{ steps.jobs.outputs.jobs }}
       run_type: ${{ steps.jobs.outputs.run_type }}
@@ -64,6 +64,8 @@ jobs:
         uses: Swatinem/rust-cache@9d47c6ad4b02e050fd481d890b2ea34778fd09d6 # v2.7.8
         with:
           workspaces: src/ci/citool
+      - name: THP check
+        run: cat /sys/kernel/mm/transparent_hugepage/enabled
       - name: Calculate the CI job matrix
         env:
           COMMIT_MESSAGE: ${{ github.event.head_commit.message }}

src/ci/github-actions/jobs.yml

@@ -2,7 +2,8 @@
 # dynamically in CI from ci.yml.
 runners:
   - &base-job
-    env: { }
+    env:
+      MALLOC_CONF: "thp:always,metadata_thp:always"
 
   - &job-linux-4c
     os: ubuntu-24.04