From 55793604e5e9dbaec81c8fbf8129d4ac7528ab69 Mon Sep 17 00:00:00 2001
From: Joerg Hofrichter <joerg.hofrichter@ni.com>
Date: Fri, 24 Apr 2020 11:30:29 +0200
Subject: mpm: systemd: added sysconf file for setting network buffer sizes

udp_zero_copy requires the network send buffer size (net.core.wmem_max)
and the network receive buffer size (net.core.rmem_max) to be set to
2500000 bytes (UDP_DEFAULT_BUFF_SIZE in udp_common.hpp).

Add a sysconf file (usrp-hwd.conf) to automatically set the recommended
values.
---
 mpm/systemd/CMakeLists.txt | 8 ++++++++
 mpm/systemd/usrp-hwd.conf  | 2 ++
 2 files changed, 10 insertions(+)
 create mode 100644 mpm/systemd/usrp-hwd.conf

(limited to 'mpm/systemd')

diff --git a/mpm/systemd/CMakeLists.txt b/mpm/systemd/CMakeLists.txt
index f56ccb076..da811c30f 100644
--- a/mpm/systemd/CMakeLists.txt
+++ b/mpm/systemd/CMakeLists.txt
@@ -10,6 +10,9 @@ PKG_CHECK_MODULES(SYSTEMD "systemd" REQUIRED)
 PKG_GET_VARIABLE(SYSTEMD_SYSTEM_UNITDIR systemd systemdsystemunitdir)
 message(STATUS "Systemd system unit directory ${SYSTEMD_SYSTEM_UNITDIR}")
 
+PKG_GET_VARIABLE(SYSTEMD_SYSCTLDIR systemd sysctldir)
+message(STATUS "Systemd sysctl directory ${SYSTEMD_SYSCTLDIR}")
+
 configure_file(
     ${CMAKE_CURRENT_SOURCE_DIR}/usrp-hwd.service.in
     ${CMAKE_CURRENT_BINARY_DIR}/usrp-hwd.service
@@ -19,3 +22,8 @@ install(FILES
   ${CMAKE_CURRENT_BINARY_DIR}/usrp-hwd.service
   DESTINATION ${SYSTEMD_SYSTEM_UNITDIR}
 )
+
+install(FILES
+  ${CMAKE_CURRENT_SOURCE_DIR}/usrp-hwd.conf
+  DESTINATION ${SYSTEMD_SYSCTLDIR}
+)
diff --git a/mpm/systemd/usrp-hwd.conf b/mpm/systemd/usrp-hwd.conf
new file mode 100644
index 000000000..cf4996afa
--- /dev/null
+++ b/mpm/systemd/usrp-hwd.conf
@@ -0,0 +1,2 @@
+net.core.wmem_max=2500000
+net.core.rmem_max=2500000
-- 
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