diff options
Diffstat (limited to 'src/plugins/nsim/nsim.c')
| -rw-r--r-- | src/plugins/nsim/nsim.c | 38 |
1 files changed, 34 insertions, 4 deletions
diff --git a/src/plugins/nsim/nsim.c b/src/plugins/nsim/nsim.c index ec79070b2e7..ce3396c5845 100644 --- a/src/plugins/nsim/nsim.c +++ b/src/plugins/nsim/nsim.c @@ -118,7 +118,8 @@ nsim_enable_disable (nsim_main_t * nsm, u32 sw_if_index0, } static int -nsim_configure (nsim_main_t * nsm, f64 bandwidth, f64 delay, f64 packet_size) +nsim_configure (nsim_main_t * nsm, f64 bandwidth, f64 delay, f64 packet_size, + f64 drop_fraction) { u64 total_buffer_size_in_bytes, per_worker_buffer_size; u64 wheel_slots_per_worker; @@ -148,6 +149,7 @@ nsim_configure (nsim_main_t * nsm, f64 bandwidth, f64 delay, f64 packet_size) } nsm->delay = delay; + nsm->drop_fraction = drop_fraction; /* delay in seconds, bandwidth in bits/sec */ total_buffer_size_in_bytes = (u32) ((delay * bandwidth) / 8.0) + 0.5; @@ -318,14 +320,21 @@ vl_api_nsim_configure_t_handler (vl_api_nsim_configure_t * mp) { vl_api_nsim_configure_reply_t *rmp; nsim_main_t *nsm = &nsim_main; - f64 delay, bandwidth, packet_size; + f64 delay, bandwidth, packet_size, drop_fraction; + u32 packets_per_drop; int rv; delay = ((f64) (ntohl (mp->delay_in_usec))) * 1e-6; bandwidth = (f64) (clib_net_to_host_u64 (mp->bandwidth_in_bits_per_second)); packet_size = (f64) (ntohl (mp->average_packet_size)); - rv = nsim_configure (nsm, bandwidth, delay, packet_size); + packets_per_drop = ntohl (mp->packets_per_drop); + if (packets_per_drop > 0) + drop_fraction = 1.0 / (f64) (packets_per_drop); + else + drop_fraction = 0.0; + + rv = nsim_configure (nsm, bandwidth, delay, packet_size, drop_fraction); REPLY_MACRO (VL_API_NSIM_CONFIGURE_REPLY); } @@ -447,6 +456,8 @@ set_nsim_command_fn (vlib_main_t * vm, nsim_main_t *nsm = &nsim_main; f64 delay, bandwidth; f64 packet_size = 1500.0; + f64 drop_fraction = 0.0; + u32 packets_per_drop; u32 num_workers = vlib_num_workers (); int rv; @@ -459,11 +470,22 @@ set_nsim_command_fn (vlib_main_t * vm, ; else if (unformat (input, "packet-size %f", &packet_size)) ; + else if (unformat (input, "packets-per-drop %d", &packets_per_drop)) + { + if (packets_per_drop > 0) + drop_fraction = 1.0 / ((f64) packets_per_drop); + } + else if (unformat (input, "drop-fraction %f", &drop_fraction)) + { + if (drop_fraction < 0.0 || drop_fraction > 1.0) + return clib_error_return + (0, "drop fraction must be between zero and 1"); + } else break; } - rv = nsim_configure (nsm, bandwidth, delay, packet_size); + rv = nsim_configure (nsm, bandwidth, delay, packet_size, drop_fraction); switch (rv) { @@ -485,6 +507,10 @@ set_nsim_command_fn (vlib_main_t * vm, vlib_cli_output (vm, "Configured link delay %.2f ms, %.2f ms round-trip", nsm->delay * 1e3, 2.0 * nsm->delay * 1e3); + if (nsm->drop_fraction > 0.0) + vlib_cli_output (vm, "... simulating a network drop fraction of %.5f", + nsm->drop_fraction); + if (num_workers) vlib_cli_output (vm, "Sim uses %llu bytes per thread, %llu bytes total", @@ -548,6 +574,10 @@ show_nsim_command_fn (vlib_main_t * vm, "...inserting link delay of %.2f ms, %.2f ms round-trip", nsm->delay * 1e3, 2.0 * nsm->delay * 1e3); + if (nsm->drop_fraction > 0.0) + vlib_cli_output (vm, "... simulating a network drop fraction of %.5f", + nsm->drop_fraction); + if (verbose) { |