*/
static double transport_pacer_period;
-#define TRANSPORT_PACER_MIN_MSS 1460
-#define TRANSPORT_PACER_MIN_BURST TRANSPORT_PACER_MIN_MSS
-#define TRANSPORT_PACER_MAX_BURST (32 * TRANSPORT_PACER_MIN_MSS)
-
u8 *
format_transport_proto (u8 * s, va_list * args)
{
format_transport_pacer (u8 * s, va_list * args)
{
spacer_t *pacer = va_arg (*args, spacer_t *);
+ vlib_main_t *vm = vlib_get_main ();
+ u64 now, diff;
- s = format (s, "bucket %u tokens/period %.3f last_update %x",
- pacer->bucket, pacer->tokens_per_period, pacer->last_update);
+ now = vm->clib_time.last_cpu_time;
+ diff = now - (pacer->last_update << SPACER_CPU_TICKS_PER_PERIOD_SHIFT);
+ s = format (s, "rate %u bucket %u t/p %.3f last_update %.3f",
+ pacer->bytes_per_sec, pacer->bucket, pacer->tokens_per_period,
+ diff * vm->clib_time.seconds_per_clock);
return s;
}
u64 n_periods = norm_time_now - pacer->last_update;
u64 inc;
- if (n_periods > 0 && (inc = n_periods * pacer->tokens_per_period) > 10)
+ if (PREDICT_FALSE (n_periods > 5e5))
+ {
+ pacer->last_update = norm_time_now;
+ pacer->bucket = TRANSPORT_PACER_MIN_BURST;
+ return TRANSPORT_PACER_MIN_BURST;
+ }
+
+ if (n_periods > 0
+ && (inc = (f32) n_periods * pacer->tokens_per_period) > 10)
{
pacer->last_update = norm_time_now;
- pacer->bucket += inc;
+ pacer->bucket = clib_min (pacer->bucket + inc, pacer->bytes_per_sec);
}
return clib_min (pacer->bucket, TRANSPORT_PACER_MAX_BURST);
spacer_set_pace_rate (spacer_t * pacer, u64 rate_bytes_per_sec)
{
ASSERT (rate_bytes_per_sec != 0);
+ pacer->bytes_per_sec = rate_bytes_per_sec;
pacer->tokens_per_period = rate_bytes_per_sec / transport_pacer_period;
}
static inline u64
spacer_pace_rate (spacer_t * pacer)
{
- return pacer->tokens_per_period * transport_pacer_period;
+ return pacer->bytes_per_sec;
+}
+
+static inline void
+spacer_reset_bucket (spacer_t * pacer, u64 norm_time_now)
+{
+ pacer->last_update = norm_time_now;
+ pacer->bucket = 0;
}
void
return spacer_max_burst (&tc->pacer, time_now);
}
+void
+transport_connection_tx_pacer_reset_bucket (transport_connection_t * tc,
+ u64 time_now)
+{
+ time_now >>= SPACER_CPU_TICKS_PER_PERIOD_SHIFT;
+ spacer_reset_bucket (&tc->pacer, time_now);
+}
+
u32
transport_connection_snd_space (transport_connection_t * tc, u64 time_now,
u16 mss)
u32 snd_space, max_paced_burst;
snd_space = tp_vfts[tc->proto].send_space (tc);
- if (transport_connection_is_tx_paced (tc))
+ if (snd_space && transport_connection_is_tx_paced (tc))
{
time_now >>= SPACER_CPU_TICKS_PER_PERIOD_SHIFT;
max_paced_burst = spacer_max_burst (&tc->pacer, time_now);
- max_paced_burst = (max_paced_burst < mss) ? 0 : max_paced_burst;
+ max_paced_burst =
+ (max_paced_burst < TRANSPORT_PACER_MIN_BURST) ? 0 : max_paced_burst;
snd_space = clib_min (snd_space, max_paced_burst);
- snd_space = snd_space - snd_space % mss;
+ return snd_space >= mss ? snd_space - snd_space % mss : snd_space;
}
return snd_space;
}