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authorFlorin Coras <fcoras@cisco.com>2021-04-28 13:01:06 -0700
committerFlorin Coras <fcoras@cisco.com>2021-04-28 18:10:10 -0700
commitccdb8b8b159ee3a489d66d5b95742949afaa2b09 (patch)
treef8e0d8cfb2fb0fc6e6feb99930807e54f684cda3 /src/vcl
parent3295ddf6b6e06f43ebf1e081a09b7b785dd217ea (diff)
vcl: fix epoll wait with indefinite timeout
Also avoid syscalls if timeout is 0. Type: fix Signed-off-by: Florin Coras <fcoras@cisco.com> Change-Id: I9193d731c51a1432a52c89d5e54e6406e5100c96
Diffstat (limited to 'src/vcl')
-rw-r--r--src/vcl/vppcom.c44
1 files changed, 16 insertions, 28 deletions
diff --git a/src/vcl/vppcom.c b/src/vcl/vppcom.c
index a0f4338f902..5e37dcfef39 100644
--- a/src/vcl/vppcom.c
+++ b/src/vcl/vppcom.c
@@ -3001,56 +3001,50 @@ handle_dequeued:
}
static int
-vppcom_epoll_wait_condvar (vcl_worker_t * wrk, struct epoll_event *events,
- int maxevents, u32 n_evts, double wait_for_time)
+vppcom_epoll_wait_condvar (vcl_worker_t *wrk, struct epoll_event *events,
+ int maxevents, u32 n_evts, double timeout_ms)
{
- double wait = 0, start = 0, now;
+ double end = -1;
if (!n_evts)
{
- wait = wait_for_time;
- start = clib_time_now (&wrk->clib_time);
+ if (timeout_ms > 0)
+ end = clib_time_now (&wrk->clib_time) + (timeout_ms / 1e3);
}
do
{
vcl_epoll_wait_handle_mq (wrk, wrk->app_event_queue, events, maxevents,
- wait, &n_evts);
- if (n_evts)
+ timeout_ms, &n_evts);
+ if (n_evts || !timeout_ms)
return n_evts;
- if (wait == -1)
- continue;
-
- now = clib_time_now (&wrk->clib_time);
- wait -= (now - start) * 1e3;
- start = now;
}
- while (wait > 0);
+ while (end == -1 || clib_time_now (&wrk->clib_time) < end);
return 0;
}
static int
-vppcom_epoll_wait_eventfd (vcl_worker_t * wrk, struct epoll_event *events,
- int maxevents, u32 n_evts, double wait_for_time)
+vppcom_epoll_wait_eventfd (vcl_worker_t *wrk, struct epoll_event *events,
+ int maxevents, u32 n_evts, double timeout_ms)
{
- double wait = 0, start = 0, now;
int __clib_unused n_read;
vcl_mq_evt_conn_t *mqc;
int n_mq_evts, i;
+ double end = -1;
u64 buf;
vec_validate (wrk->mq_events, pool_elts (wrk->mq_evt_conns));
if (!n_evts)
{
- wait = wait_for_time;
- start = clib_time_now (&wrk->clib_time);
+ if (timeout_ms > 0)
+ end = clib_time_now (&wrk->clib_time) + (timeout_ms / 1e3);
}
do
{
n_mq_evts = epoll_wait (wrk->mqs_epfd, wrk->mq_events,
- vec_len (wrk->mq_events), wait);
+ vec_len (wrk->mq_events), timeout_ms);
if (n_mq_evts < 0)
{
VDBG (0, "epoll_wait error %u", errno);
@@ -3065,16 +3059,10 @@ vppcom_epoll_wait_eventfd (vcl_worker_t * wrk, struct epoll_event *events,
&n_evts);
}
- if (n_evts)
+ if (n_evts || !timeout_ms)
return n_evts;
- if (wait == -1)
- continue;
-
- now = clib_time_now (&wrk->clib_time);
- wait -= (now - start) * 1e3;
- start = now;
}
- while (wait > 0);
+ while (end == -1 || clib_time_now (&wrk->clib_time) < end);
return 0;
}