From aefd2effc5ead3c414d8d85fbe35d06cbbd0d337 Mon Sep 17 00:00:00 2001
From: Patrick Ohly <patrick.ohly@intel.com>
Date: Tue, 16 Sep 2025 15:59:52 +0200
Subject: [PATCH] test: automatically lower Ginkgo parallelism when using race
 detection

When race detection is enabled, merely running 25 e2e.test instances was too much
and the OOM killer shut down the Prow test pod because of the memory overhead.

A CI job could control that via GINKGO_PARALLEL_NODES, but we should also have
saner defaults which take this into account.
---
 hack/ginkgo-e2e.sh | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/hack/ginkgo-e2e.sh b/hack/ginkgo-e2e.sh
index b0fc78e6bca..1a4f97f18ab 100755
--- a/hack/ginkgo-e2e.sh
+++ b/hack/ginkgo-e2e.sh
@@ -181,7 +181,16 @@ case "${E2E_TEST_DEBUG_TOOL:-ginkgo}" in
     if [[ -n "${GINKGO_PARALLEL_NODES:-}" ]]; then
       program+=("--nodes=${GINKGO_PARALLEL_NODES}")
     elif [[ ${GINKGO_PARALLEL} =~ ^[yY]$ ]]; then
-      program+=("--nodes=25")
+      if [[ "${KUBE_RACE:-}" == "-race" ]]; then
+        # When race detection is enabled, merely running 25 e2e.test instances was too much
+        # and the OOM killer shut down the Prow test pod because of the memory overhead.
+        #
+        # A CI job could control that via GINKGO_PARALLEL_NODES, but we should also have
+        # saner defaults which take this into account.
+        program+=("--nodes=10")
+      else
+        program+=("--nodes=25")
+      fi
     fi
     program+=("${ginkgo_args[@]:+${ginkgo_args[@]}}")
     ;;