diff options
| author |   Dave Barach <dave@barachs.net> | 2018-06-14 18:52:46 -0400 |
|---|---|---|
| committer |   Damjan Marion <dmarion@me.com> | 2018-06-21 14:57:02 +0000 |
| commit | 85aa49019f4b4b2b7a4fce4313fdc0f2de65c277 (patch) | |
| tree | 14c2ef301403f64e1dd08f7912c86a2cb1bffed3 /src/vlib/unix | |
| parent | cb3b7052357b57ab927edf178baa1412d7df81d5 (diff) | |
configurable per-dispatch-cycle sleep
Workaround for lack of driver interrupt support. Also quite handy for
home gateway, laptop/vagrant, other use-cases not requiring maximum
vectors/second for proper operation.
Change-Id: Ifc4b98112450664beef67b89ab8a6940a3bf24b5
Signed-off-by: Dave Barach <dave@barachs.net>
Diffstat (limited to 'src/vlib/unix')
| -rw-r--r-- | src/vlib/unix/input.c | 22 | ||||
| -rw-r--r-- | src/vlib/unix/main.c | 2 | ||||
| -rw-r--r-- | src/vlib/unix/unix.h | 3 |
3 files changed, 25 insertions, 2 deletions
diff --git a/src/vlib/unix/input.c b/src/vlib/unix/input.c index 321e443dee9..0a61c05d471 100644 --- a/src/vlib/unix/input.c +++ b/src/vlib/unix/input.c @@ -148,9 +148,27 @@ linux_epoll_input_inline (vlib_main_t * vm, vlib_node_runtime_t * node, int timeout_ms = 0, max_timeout_ms = 10; f64 vector_rate = vlib_last_vectors_per_main_loop (vm); + /* + * If we've been asked for a fixed-sleep between main loop polls, + * do so right away. + */ + if (PREDICT_FALSE (is_main && um->poll_sleep_usec)) + { + struct timespec ts, tsrem; + timeout = 0; + timeout_ms = 0; + node->input_main_loops_per_call = 0; + ts.tv_sec = 0; + ts.tv_nsec = 1000 * um->poll_sleep_usec; + + while (nanosleep (&ts, &tsrem) < 0) + { + ts = tsrem; + } + } /* If we're not working very hard, decide how long to sleep */ - if (is_main && vector_rate < 2 && vm->api_queue_nonempty == 0 - && nm->input_node_counts_by_state[VLIB_NODE_STATE_POLLING] == 0) + else if (is_main && vector_rate < 2 && vm->api_queue_nonempty == 0 + && nm->input_node_counts_by_state[VLIB_NODE_STATE_POLLING] == 0) { ticks_until_expiration = TW (tw_timer_first_expires_in_ticks) ((TWT (tw_timer_wheel) *) nm->timing_wheel); diff --git a/src/vlib/unix/main.c b/src/vlib/unix/main.c index 786addf2e0a..f812b080f07 100644 --- a/src/vlib/unix/main.c +++ b/src/vlib/unix/main.c @@ -344,6 +344,8 @@ unix_config (vlib_main_t * vm, unformat_input_t * input) um->cli_no_banner = 1; else if (unformat (input, "cli-no-pager")) um->cli_no_pager = 1; + else if (unformat (input, "poll-sleep-usec %d", &um->poll_sleep_usec)) + ; else if (unformat (input, "cli-pager-buffer-limit %d", &um->cli_pager_buffer_limit)) ; diff --git a/src/vlib/unix/unix.h b/src/vlib/unix/unix.h index 4c8566b7ee8..7856e5b7df7 100644 --- a/src/vlib/unix/unix.h +++ b/src/vlib/unix/unix.h @@ -102,6 +102,9 @@ typedef struct /* Store the original state of stdin when it's a tty */ struct termios tio_stdin; int tio_isset; + + u32 poll_sleep_usec; + } unix_main_t; /* Global main structure. */ |