#include "gnunet_bandwidth_lib.h"
#include "gnunet_server_lib.h"
+#define DEBUG_BANDWIDTH GNUNET_NO
+
/**
* Create a new bandwidth value.
*
{
struct GNUNET_BANDWIDTH_Value32NBO ret;
+#if DEBUG_BANDWIDTH
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Initializing bandwidth of %u bps\n",
+ (unsigned int) bytes_per_second);
+#endif
ret.value__ = htonl (bytes_per_second);
return ret;
}
uint64_t b;
b = ntohl (bps.value__);
- return b * deadline.value / 1000LL;
+#if DEBUG_BANDWIDTH
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Bandwidth has %llu bytes available until deadline in %llums\n",
+ (unsigned long long) ((b * deadline.value + 500LL) / 1000LL),
+ deadline.value);
+#endif
+ return (b * deadline.value + 500LL) / 1000LL;
}
b = ntohl (bps.value__);
if (b == 0)
- return GNUNET_TIME_UNIT_FOREVER_REL;
+ {
+#if DEBUG_BANDWIDTH
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Bandwidth suggests delay of infinity (zero bandwidth)\n");
+#endif
+ return GNUNET_TIME_UNIT_FOREVER_REL;
+ }
ret.value = size * 1000LL / b;
+#if DEBUG_BANDWIDTH
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Bandwidth suggests delay of %llu ms for %llu bytes of traffic\n",
+ (unsigned long long) ret.value,
+ (unsigned long long) size);
+#endif
return ret;
}
av->last_update__ = GNUNET_TIME_absolute_get ();
av->available_bytes_per_s__ = ntohl (bytes_per_second_limit.value__);
av->max_carry_s__ = max_carry_s;
+#if DEBUG_BANDWIDTH
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Tracker %p initialized with %u bps and max carry %u\n",
+ av,
+ (unsigned int) av->available_bytes_per_s__,
+ (unsigned int) max_carry_s);
+#endif
}
now = GNUNET_TIME_absolute_get ();
delta_time = now.value - av->last_update__.value;
- delta_avail = (delta_time * ((unsigned long long) av->available_bytes_per_s__)) / 1000LL;
+ delta_avail = (delta_time * ((unsigned long long) av->available_bytes_per_s__) + 500LL) / 1000LL;
if (av->consumption_since_last_update__ >= delta_avail)
{
av->consumption_since_last_update__ -= delta_avail;
else
{
left_bytes = delta_avail - av->consumption_since_last_update__;
- avail_per_ms = ((unsigned long long) av->available_bytes_per_s__) / 1000LL;
+ avail_per_ms = ((unsigned long long) av->available_bytes_per_s__ + 500LL) / 1000LL;
if (avail_per_ms > 0)
- left_time_ms = left_bytes / avail_per_ms;
- else
- left_time_ms = 0;
- if (left_time_ms > ((unsigned long long) av->max_carry_s__) * 1000LL)
{
- /* need to limit accumulation of unused bandwidth */
- left_time_ms = ((unsigned long long) av->max_carry_s__) * 1000LL;
- if (left_time_ms * avail_per_ms < GNUNET_SERVER_MAX_MESSAGE_SIZE)
+ left_time_ms = left_bytes / avail_per_ms;
+ if (left_time_ms > ((unsigned long long) av->max_carry_s__) * 1000LL)
{
- /* need to still allow GNUNET_SERVER_MAX_MESSAGE_SIZE accumulation */
- if (left_bytes > GNUNET_SERVER_MAX_MESSAGE_SIZE)
- left_bytes = GNUNET_SERVER_MAX_MESSAGE_SIZE;
- left_time_ms = left_bytes / avail_per_ms;
+ /* need to limit accumulation of unused bandwidth */
+ left_time_ms = ((unsigned long long) av->max_carry_s__) * 1000LL;
+ if (left_time_ms * avail_per_ms < GNUNET_SERVER_MAX_MESSAGE_SIZE)
+ {
+ /* need to still allow GNUNET_SERVER_MAX_MESSAGE_SIZE accumulation */
+ if (left_bytes > GNUNET_SERVER_MAX_MESSAGE_SIZE)
+ left_bytes = GNUNET_SERVER_MAX_MESSAGE_SIZE;
+ left_time_ms = left_bytes / avail_per_ms;
+ }
}
}
+ else
+ {
+ left_time_ms = 0;
+ }
av->consumption_since_last_update__ = 0;
av->last_update__.value = now.value - left_time_ms;
}
+#if DEBUG_BANDWIDTH
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Tracker %p updated, have %u bps last update was %llu ms ago\n",
+ av,
+ (unsigned int) av->available_bytes_per_s__,
+ (unsigned long long) (now.value - av->last_update__.value));
+#endif
}
{
uint64_t nc;
+#if DEBUG_BANDWIDTH
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Tracker %p consumes %d bytes\n",
+ av,
+ (int) size);
+#endif
if (size > 0)
{
nc = av->consumption_since_last_update__ + size;
av->consumption_since_last_update__ = nc;
update_tracker (av);
if (av->consumption_since_last_update__ > 0)
- return GNUNET_YES;
+ {
+#if DEBUG_BANDWIDTH
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Tracker %p consumption %llu bytes above limit\n",
+ av,
+ (unsigned long long) av->consumption_since_last_update__);
+#endif
+ return GNUNET_YES;
+ }
}
else
{
- av->last_update__.value -= (size * av->available_bytes_per_s__) / 1000LL;
+ av->last_update__.value -= ((-size) * av->available_bytes_per_s__ + 500LL) / 1000LL;
update_tracker (av);
}
return GNUNET_NO;
uint64_t bytes_needed;
if (av->available_bytes_per_s__ == 0)
- return GNUNET_TIME_UNIT_FOREVER_REL;
+ {
+#if DEBUG_BANDWIDTH
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Tracker %p delay is infinity\n",
+ av);
+#endif
+ return GNUNET_TIME_UNIT_FOREVER_REL;
+ }
update_tracker (av);
now = GNUNET_TIME_absolute_get ();
delta_time = now.value - av->last_update__.value;
- delta_avail = (delta_time * ((unsigned long long) av->available_bytes_per_s__)) / 1000LL;
+ delta_avail = (delta_time * ((unsigned long long) av->available_bytes_per_s__) + 500LL) / 1000LL;
if (delta_avail >= size)
- return GNUNET_TIME_UNIT_ZERO;
+ {
+#if DEBUG_BANDWIDTH
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Tracker %p delay for %u bytes is zero\n",
+ av,
+ (unsigned int) size);
+#endif
+ return GNUNET_TIME_UNIT_ZERO;
+ }
bytes_needed = size - delta_avail;
ret.value = 1000LL * bytes_needed / (unsigned long long) av->available_bytes_per_s__;
+#if DEBUG_BANDWIDTH
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Tracker %p delay for %u bytes is %llu ms\n",
+ av,
+ (unsigned int) size,
+ (unsigned long long) ret.value);
+#endif
return ret;
}
avail = GNUNET_BANDWIDTH_value_get_available_until (bps,
GNUNET_TIME_absolute_get_duration (av->last_update__));
used = av->consumption_since_last_update__;
+#if DEBUG_BANDWIDTH
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Tracker %p available bandwith is %lld ms\n",
+ av,
+ (long long) (int64_t) (avail - used));
+#endif
return (int64_t) (avail - used);
}
uint32_t new_limit;
new_limit = ntohl (bytes_per_second_limit.value__);
+#if DEBUG_BANDWIDTH
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Tracker %p bandwith changed to %u bps\n",
+ av,
+ (unsigned int) new_limit);
+#endif
update_tracker (av);
old_limit = av->available_bytes_per_s__;
av->available_bytes_per_s__ = new_limit;