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authorDave Wallace <dwallacelf@gmail.com>2020-01-21 16:56:19 +0000
committerAndrew Yourtchenko <ayourtch@gmail.com>2020-01-27 20:55:12 +0000
commit664c9613ac5485859c8307d66f6b2d5bc0f4fc43 (patch)
tree0c7046b6c7f2f100e5b410c4521ce174ad753853
parent0c514f0d76762bbd408fd41f2799343facbb8e02 (diff)
nsim: enable output scheduling on main thread
Type: fix Ticket: VPP-1813 Change-Id: I5d47cb9bc7eb7f3c8485e3b42f0701e81d87ba2a Signed-off-by: Dave Wallace <dwallacelf@gmail.com> (cherry picked from commit c0c4eec3bc309bcc656eade82f17754875f9ed7c)
-rw-r--r--src/plugins/nsim/nsim.c30
-rw-r--r--src/plugins/nsim/nsim.h1
2 files changed, 29 insertions, 2 deletions
diff --git a/src/plugins/nsim/nsim.c b/src/plugins/nsim/nsim.c
index 5bc9eaecdd6..c6414905018 100644
--- a/src/plugins/nsim/nsim.c
+++ b/src/plugins/nsim/nsim.c
@@ -182,7 +182,8 @@ nsim_configure (nsim_main_t * nsm, f64 bandwidth, f64 delay, f64 packet_size,
vec_validate (nsm->wheel_by_thread, num_workers);
/* Initialize the output scheduler wheels */
- for (i = num_workers ? 1 : 0; i < num_workers + 1; i++)
+ i = (!nsm->poll_main_thread && num_workers) ? 1 : 0;
+ for (; i < num_workers + 1; i++)
{
nsim_wheel_t *wp;
@@ -205,7 +206,8 @@ nsim_configure (nsim_main_t * nsm, f64 bandwidth, f64 delay, f64 packet_size,
vlib_worker_thread_barrier_sync (vm);
/* turn on the ring scrapers */
- for (i = num_workers ? 1 : 0; i < num_workers + 1; i++)
+ i = (!nsm->poll_main_thread && num_workers) ? 1 : 0;
+ for (; i < num_workers + 1; i++)
{
vlib_main_t *this_vm = vlib_mains[i];
@@ -287,6 +289,28 @@ nsim_cross_connect_enable_disable_command_fn (vlib_main_t * vm,
return 0;
}
+static clib_error_t *
+nsim_config (vlib_main_t * vm, unformat_input_t * input)
+{
+ nsim_main_t *nsm = &nsim_main;
+
+ while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat (input, "poll-main-thread"))
+ {
+ nsm->poll_main_thread = 1;
+ }
+ else
+ {
+ return clib_error_return (0, "unknown input '%U'",
+ format_unformat_error, input);
+ }
+ }
+ return 0;
+}
+
+VLIB_CONFIG_FUNCTION (nsim_config, "nsim");
+
/*?
* Enable or disable network simulation cross-connect on two interfaces
* The network simulator must have already been configured, see
@@ -584,6 +608,8 @@ set_nsim_command_fn (vlib_main_t * vm,
return clib_error_return
(0, "drop fraction must be between zero and 1");
}
+ else if (unformat (input, "poll-main-thread"))
+ nsm->poll_main_thread = 1;
else
break;
}
diff --git a/src/plugins/nsim/nsim.h b/src/plugins/nsim/nsim.h
index 6afe32dc7f7..0ed9b251fbc 100644
--- a/src/plugins/nsim/nsim.h
+++ b/src/plugins/nsim/nsim.h
@@ -68,6 +68,7 @@ typedef struct
f64 bandwidth;
f64 packet_size;
f64 drop_fraction;
+ u32 poll_main_thread;
u64 mmap_size;