dsmiley commented on code in PR #1303:
URL: https://github.com/apache/solr/pull/1303#discussion_r1084822103


##########
.github/workflows/solrj-test-crave.yml:
##########
@@ -0,0 +1,41 @@
+name: SolrJ Tests
+
+on:
+  pull_request:
+    branches:
+      - 'main'
+    paths:
+      - '.github/workflows/solrj-test.yml'
+      - 'solr/solrj/**'
+
+jobs:
+  test:
+    name: Run SolrJ Tests
+
+    runs-on: ubuntu-latest
+
+    steps:
+    # Setup
+    - uses: actions/checkout@v2
+    - name: Set up JDK 11
+      uses: actions/setup-java@v2
+      with:
+        distribution: 'temurin'
+        java-version: 11
+        java-package: jdk
+    - name: Grant execute permission for gradlew
+      run: chmod +x gradlew
+    - uses: actions/cache@v2
+      with:
+        path: |
+          ~/.gradle/caches
+        key: ${{ runner.os }}-gradle-solrj-${{ hashFiles('versions.lock') }}
+        restore-keys: |
+          ${{ runner.os }}-gradle-solrj-
+          ${{ runner.os }}-gradle-
+    - name: Get the Crave binary
+      run: curl -s 
https://raw.githubusercontent.com/accupara/crave/master/get_crave.sh | bash -s 
--
+    - name: Initialize gradle settings
+      run: ./crave run -- ./gradlew localSettings

Review Comment:
   Half the number of available processors reported by the JVM; the JVM counts 
hyper threads individually.  Since 2x threads per core is common, our build 
divided this by two to guess at the number of physical cores.  Then this is 
capped at 12.  Logic is in `./gradle/generation/local-settings.gradle`.  There 
are lots of concurrent threads in the JVM so I this this approach of using 
physical cores in spite of hyper threading makes sense.  On a machine with 96 
threads on 48 cores (which I used last weekend playing around on Crave.io), 48 
gradle workers worked well (and so did 24).



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