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authorDimitri Staessens <dimitri@ouroboros.rocks>2019-03-28 14:26:36 +0100
committerSander Vrijders <sander@ouroboros.rocks>2019-03-28 14:54:03 +0100
commit7039fd62a5863741adb757665696a67a8228db40 (patch)
tree4ea61f6e76f1e7f5e01c4f9ba31642b1b2d64813 /src
parent34b82a4d68022d462d49dd1f0401e81b84319f47 (diff)
downloadouroboros-7039fd62a5863741adb757665696a67a8228db40.tar.gz
ouroboros-7039fd62a5863741adb757665696a67a8228db40.zip
ipcpd: Give max priority to flow allocator
The flow allocator thread was running on a low priority, causing some delay when handling packets. Usually this isn't a problem, but for congestion control updates, the delay may become problematic. The priority is now set to the maximum allowed by the scheduler policy to improve responsiveness. Signed-off-by: Dimitri Staessens <dimitri@ouroboros.rocks> Signed-off-by: Sander Vrijders <sander@ouroboros.rocks>
Diffstat (limited to 'src')
-rw-r--r--src/ipcpd/normal/fa.c33
1 files changed, 31 insertions, 2 deletions
diff --git a/src/ipcpd/normal/fa.c b/src/ipcpd/normal/fa.c
index e03467c2..76942143 100644
--- a/src/ipcpd/normal/fa.c
+++ b/src/ipcpd/normal/fa.c
@@ -306,15 +306,44 @@ void fa_fini(void)
int fa_start(void)
{
+ struct sched_param par;
+ int pol;
+ int max;
+
fa.psched = psched_create(packet_handler);
- if (fa.psched == NULL)
+ if (fa.psched == NULL) {
+ log_err("Failed to start packet scheduler.");
goto fail_psched;
+ }
- if (pthread_create(&fa.worker, NULL, fa_handle_packet, NULL))
+ if (pthread_create(&fa.worker, NULL, fa_handle_packet, NULL)) {
+ log_err("Failed to create worker thread.");
goto fail_thread;
+ }
+
+ if (pthread_getschedparam(fa.worker, &pol, &par)) {
+ log_err("Failed to get worker thread scheduling parameters.");
+ goto fail_sched;
+ }
+
+ max = sched_get_priority_max(pol);
+ if (max < 0) {
+ log_err("Failed to get max priority for scheduler.");
+ goto fail_sched;
+ }
+
+ par.sched_priority = max;
+
+ if (pthread_setschedparam(fa.worker, pol, &par)) {
+ log_err("Failed to set scheduler priority to maximum.");
+ goto fail_sched;
+ }
return 0;
+ fail_sched:
+ pthread_cancel(fa.worker);
+ pthread_join(fa.worker, NULL);
fail_thread:
psched_destroy(fa.psched);
fail_psched: