ose: Thread priorities configurable from lmconf

The pattern used for getting the priority from the lmconf
is based on the name of the process created. The pattern is:

ERTS_%%PROCESS_NAME%%_PRIO

with the %%PROCESS_NAME%% replaced by the prefix of the process
the priority applies to. eg:

ERTS_SCHEDULER_PRIO=24

applies to processes with name SCHEDULER_1, SCHEDULER_2 etc.

2 files changed, 15 insertions, 1 deletions

diff --git a/erts/emulator/sys/ose/default.lmconf b/erts/emulator/sys/ose/default.lmconf
index 17b7a1e5fa..a66b0ece56 100644
--- a/erts/emulator/sys/ose/default.lmconf
+++ b/erts/emulator/sys/ose/default.lmconf
@@ -13,6 +13,12 @@ HEAP_SMALL_BUF_INIT_SIZE=64000000
 HEAP_LARGE_BUF_THRESHOLD=16000000
 HEAP_LOCK_TYPE=2
 
+ERTS_DEFAULT_PRIO=24
+ERTS_SCHEDULER_PRIO=24
+ERTS_ASYNC_PRIO=22
+ERTS_AUX_PRIO=24
+ERTS_SYS_MSG_DISPATCHER_PRIO=21
+
 # Setting the environment variable EFS_RESOLVE_TMO on the block to 0.
 # This will eliminiate delays when trying to open files on not mounted
 # volumes.
diff --git a/erts/emulator/sys/ose/sys.c b/erts/emulator/sys/ose/sys.c
index beb7f5944f..88dbd7fcf8 100644
--- a/erts/emulator/sys/ose/sys.c
+++ b/erts/emulator/sys/ose/sys.c
@@ -50,6 +50,14 @@
 #include "efs.h"
 #include "erl_printf.h"
 
+/* Set the define to 1 to get some logging */
+#if 0
+#include "ramlog.h"
+#define LOG(output) ramlog_printf output
+#else
+#define LOG(output)
+#endif
+
 extern char **environ;
 static erts_smp_rwmtx_t environ_rwmtx;
 
@@ -68,7 +76,7 @@ static erts_smp_rwmtx_t environ_rwmtx;
 #include "erl_cpu_topology.h"
 
 /* The priority for reader/writer processes */
-#define FD_PROC_PRI 20
+#define FD_PROC_PRI get_pri(current_process())
 
 typedef struct ErtsSysReportExit_ ErtsSysReportExit;
 struct ErtsSysReportExit_ {