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authorAndrew Yourtchenko <ayourtch@gmail.com>2017-08-16 12:06:15 +0200
committerAndrew Yourtchenko <ayourtch@gmail.com>2017-08-18 10:53:22 +0000
commit71bb05454c97cc18e3c95127b54385c52e4c57c2 (patch)
tree1c8aee3412819b200a8462cf6d2675bab78fd3ec /src/plugins/acl/fa_node.c
parent8712ada6c3a84b2f75a25457ec6d477f3683787c (diff)
acl-plugin: time out the sessions created by main thread too (VPP-948)
In multithread setup the main thread may send packets, which may pass through the node with permit+reflect action. This creates the connection in lists for thread0, however in multithread there are no interupt handlers there. Ensure we are not spending too much time spinning in a tight cycle by suspending the main cleaner thread until the current iteration of interrupts is processed. Change-Id: Idb7346737757ee9a67b5d3e549bc9ad9aab22e89 Signed-off-by: Andrew Yourtchenko <ayourtch@gmail.com> (cherry picked from commit c1ff53f25d04ec1cc31844abd38014e91e398b5f)
Diffstat (limited to 'src/plugins/acl/fa_node.c')
-rw-r--r--src/plugins/acl/fa_node.c33
1 files changed, 20 insertions, 13 deletions
diff --git a/src/plugins/acl/fa_node.c b/src/plugins/acl/fa_node.c
index 1eeaa8c8df5..8d8f1d2eee4 100644
--- a/src/plugins/acl/fa_node.c
+++ b/src/plugins/acl/fa_node.c
@@ -1361,6 +1361,7 @@ acl_fa_worker_conn_cleaner_process(vlib_main_t * vm,
pw->interrupt_is_unwanted = 0;
}
}
+ pw->interrupt_generation = am->fa_interrupt_generation;
return 0;
}
@@ -1404,7 +1405,7 @@ acl_fa_session_cleaner_process (vlib_main_t * vm, vlib_node_runtime_t * rt,
am->fa_current_cleaner_timer_wait_interval = max_timer_wait_interval;
am->fa_cleaner_node_index = acl_fa_session_cleaner_process_node.index;
-
+ am->fa_interrupt_generation = 1;
while (1)
{
now = clib_cpu_time_now ();
@@ -1503,10 +1504,6 @@ acl_fa_session_cleaner_process (vlib_main_t * vm, vlib_node_runtime_t * rt,
clib_warning("ACL_FA_CLEANER_DELETE_BY_SW_IF_INDEX bitmap: %U", format_bitmap_hex, clear_sw_if_index_bitmap);
#endif
vec_foreach(pw0, am->per_worker_data) {
- if ((pw0 == am->per_worker_data) && (vec_len(vlib_mains) > 1)) {
- /* thread 0 in multithreaded scenario is not used */
- continue;
- }
CLIB_MEMORY_BARRIER ();
while (pw0->clear_in_process) {
CLIB_MEMORY_BARRIER ();
@@ -1541,10 +1538,6 @@ acl_fa_session_cleaner_process (vlib_main_t * vm, vlib_node_runtime_t * rt,
clib_warning("CLEANER mains len: %d per-worker len: %d", vec_len(vlib_mains), vec_len(am->per_worker_data));
#endif
vec_foreach(pw0, am->per_worker_data) {
- if ((pw0 == am->per_worker_data) && (vec_len(vlib_mains) > 1)) {
- /* thread 0 in multithreaded scenario is not used */
- continue;
- }
CLIB_MEMORY_BARRIER ();
while (pw0->clear_in_process) {
CLIB_MEMORY_BARRIER ();
@@ -1581,15 +1574,28 @@ acl_fa_session_cleaner_process (vlib_main_t * vm, vlib_node_runtime_t * rt,
if (event_data)
_vec_len (event_data) = 0;
+ /*
+ * If the interrupts were not processed yet, ensure we wait a bit,
+ * but up to a point.
+ */
+ int need_more_wait = 0;
+ int max_wait_cycles = 100;
+ do {
+ need_more_wait = 0;
+ vec_foreach(pw0, am->per_worker_data) {
+ if (pw0->interrupt_generation != am->fa_interrupt_generation) {
+ need_more_wait = 1;
+ }
+ }
+ if (need_more_wait) {
+ vlib_process_suspend(vm, 0.0001);
+ }
+ } while (need_more_wait && (--max_wait_cycles > 0));
int interrupts_needed = 0;
int interrupts_unwanted = 0;
vec_foreach(pw0, am->per_worker_data) {
- if ((pw0 == am->per_worker_data) && (vec_len(vlib_mains) > 1)) {
- /* thread 0 in multithreaded scenario is not used */
- continue;
- }
if (pw0->interrupt_is_needed) {
interrupts_needed++;
/* the per-worker value is reset when sending the interrupt */
@@ -1610,6 +1616,7 @@ acl_fa_session_cleaner_process (vlib_main_t * vm, vlib_node_runtime_t * rt,
am->fa_current_cleaner_timer_wait_interval += cpu_cps * am->fa_cleaner_wait_time_increment;
}
am->fa_cleaner_cnt_event_cycles++;
+ am->fa_interrupt_generation++;
}
/* NOT REACHED */
return 0;