pespin has submitted this change. ( https://gerrit.osmocom.org/c/osmocom-bb/+/39817?usp=email )

Change subject: Set sched RR Priority on main thread ......................................................................

Set sched RR Priority on main thread

Since we are still affected by Python GIL, it makes sense to also set the main thread (which is actually also expected to be real time) to a real time priority.

Use a slightly higher rr prio (prio + 1) to the clckgen thread.

Change-Id: I6aa22125e7de4f472d691b271639d5bee25762cb --- M src/target/trx_toolkit/fake_trx.py 1 file changed, 10 insertions(+), 1 deletion(-)

Approvals: pespin: Looks good to me, approved Jenkins Builder: Verified fixeria: Looks good to me, but someone else must approve osmith: Looks good to me, but someone else must approve

diff --git a/src/target/trx_toolkit/fake_trx.py b/src/target/trx_toolkit/fake_trx.py index ddeb083..8f187ac 100755 --- a/src/target/trx_toolkit/fake_trx.py +++ b/src/target/trx_toolkit/fake_trx.py @@ -27,6 +27,7 @@ import select import sys import re +import os

from app_common import ApplicationBase from burst_fwd import BurstForwarder @@ -397,7 +398,7 @@ self.trx_list = TRXList()

# Init shared clock generator - self.clck_gen = CLCKGen([], sched_rr_prio = self.argv.sched_rr_prio) + self.clck_gen = CLCKGen([], sched_rr_prio = None if self.argv.sched_rr_prio is None else self.argv.sched_rr_prio + 1) # This method will be called on each TDMA frame self.clck_gen.clck_handler = self.clck_handler

@@ -450,6 +451,14 @@ trx_parent.child_trx_list.add_trx(trx_child)

def run(self): + if self.argv.sched_rr_prio is not None: + sched_param = os.sched_param(self.argv.sched_rr_prio) + try: + log.info("Setting real time process scheduler to SCHED_RR, priority %u" % (self.argv.sched_rr_prio)) + os.sched_setscheduler(0, os.SCHED_RR, sched_param) + except OSError: + log.error("Failed to set real time process scheduler to SCHED_RR, priority %u" % (self.argv.sched_rr_prio)) + # Compose list of to be monitored sockets sock_list = [] for trx in self.trx_list.trx_list: