From c7446906bdd2e30e5e830a77c05ab9a15aece254 Mon Sep 17 00:00:00 2001
From: realtyem <realtyem@gmail.com>
Date: Fri, 14 Oct 2022 07:29:49 -0500
Subject: [PATCH] Set LD_PRELOAD to load jemalloc in Dockerfile-workers.
(#14182)
---
changelog.d/14182.docker | 1 +
docker/configure_workers_and_start.py | 12 +++++++++++-
2 files changed, 12 insertions(+), 1 deletion(-)
create mode 100644 changelog.d/14182.docker
diff --git a/changelog.d/14182.docker b/changelog.d/14182.docker
new file mode 100644
index 0000000000..a0ce1bce53
--- /dev/null
+++ b/changelog.d/14182.docker
@@ -0,0 +1 @@
+Set LD_PRELOAD to use jemalloc memory allocator in Dockerfile-workers.
diff --git a/docker/configure_workers_and_start.py b/docker/configure_workers_and_start.py
index d708237f69..4d78453418 100755
--- a/docker/configure_workers_and_start.py
+++ b/docker/configure_workers_and_start.py
@@ -39,6 +39,7 @@
# continue to work if so.
import os
+import platform
import subprocess
import sys
from pathlib import Path
@@ -632,14 +633,23 @@ def main(args: List[str], environ: MutableMapping[str, str]) -> None:
with open(mark_filepath, "w") as f:
f.write("")
+ # Lifted right out of start.py
+ jemallocpath = "/usr/lib/%s-linux-gnu/libjemalloc.so.2" % (platform.machine(),)
+
+ if os.path.isfile(jemallocpath):
+ environ["LD_PRELOAD"] = jemallocpath
+ else:
+ log("Could not find %s, will not use" % (jemallocpath,))
+
# Start supervisord, which will start Synapse, all of the configured worker
# processes, redis, nginx etc. according to the config we created above.
log("Starting supervisord")
- os.execl(
+ os.execle(
"/usr/local/bin/supervisord",
"supervisord",
"-c",
"/etc/supervisor/supervisord.conf",
+ environ,
)
--
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