python3-grpcio(-tools): fix build concurrency issue

Set GRPC_PYTHON_BUILD_EXT_COMPILER_JOBS to limit spawned compiler
processes. Without this it uses all available CPUs (via
multiprocessing.cpu_count()) and can exhaust build host since there are
lot of files to compile (e.g. with 128 cores it manages to spawn 128 gcc
processes)

Note that this is a general problem for all setuptools based builds with
build_ext compilation which can either compile with 1 thread or
cpu_count threads. grpcio hot-patches setuptools and allows to set
specific build concurrency value.

(From master rev: fe582374d3ba474164005942799eb2bddc52a080)

Signed-off-by: Peter Marko <peter.marko@siemens.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Armin Kuster <akuster808@gmail.com>

2 files changed, 8 insertions, 0 deletions

diff --git a/meta-python/recipes-devtools/python/python3-grpcio-tools_1.62.2.bb b/meta-python/recipes-devtools/python/python3-grpcio-tools_1.62.2.bb
index e05b8734d6..5b8bbe681a 100644
--- a/meta-python/recipes-devtools/python/python3-grpcio-tools_1.62.2.bb
+++ b/meta-python/recipes-devtools/python/python3-grpcio-tools_1.62.2.bb
@@ -16,4 +16,8 @@ SRC_URI[sha256sum] = "5fd5e1582b678e6b941ee5f5809340be5e0724691df5299aae8226640f
 
 RDEPENDS:${PN} = "python3-grpcio"
 
+do_compile:prepend() {
+    export GRPC_PYTHON_BUILD_EXT_COMPILER_JOBS="${@oe.utils.parallel_make(d, False)}"
+}
+
 BBCLASSEXTEND = "native nativesdk"
diff --git a/meta-python/recipes-devtools/python/python3-grpcio_1.62.2.bb b/meta-python/recipes-devtools/python/python3-grpcio_1.62.2.bb
index b12b509142..3581991a56 100644
--- a/meta-python/recipes-devtools/python/python3-grpcio_1.62.2.bb
+++ b/meta-python/recipes-devtools/python/python3-grpcio_1.62.2.bb
@@ -38,6 +38,10 @@ BORING_SSL:aarch64 = "1"
 BORING_SSL ?= "0"
 export GRPC_BUILD_WITH_BORING_SSL_ASM = "${BORING_SSL}"
 
+do_compile:prepend() {
+    export GRPC_PYTHON_BUILD_EXT_COMPILER_JOBS="${@oe.utils.parallel_make(d, False)}"
+}
+
 GRPC_CFLAGS ?= ""
 GRPC_CFLAGS:append:toolchain-clang = " -fvisibility=hidden -fno-wrapv -fno-exceptions"
 export GRPC_PYTHON_CFLAGS = "${GRPC_CFLAGS}"