/** Return true iff we have sent/received almost all the bytes we are willing
* to send/receive this interval. */
static int
hibernate_soft_limit_reached(void)
{
const uint64_t acct_max = get_options()->AccountingMax;
#define SOFT_LIM_PCT (.95)
#define SOFT_LIM_BYTES (500*1024*1024)
#define SOFT_LIM_MINUTES (3*60)
/* The 'soft limit' is a fair bit more complicated now than once it was.
* We want to stop accepting connections when ALL of the following are true:
* - We expect to use up the remaining bytes in under 3 hours
* - We have used up 95% of our bytes.
* - We have less than 500MB of bytes left.
*/
uint64_t soft_limit = DBL_TO_U64(U64_TO_DBL(acct_max) * SOFT_LIM_PCT);
if (acct_max > SOFT_LIM_BYTES && acct_max - SOFT_LIM_BYTES > soft_limit) {
soft_limit = acct_max - SOFT_LIM_BYTES;
}
if (expected_bandwidth_usage) {
const uint64_t expected_usage =
expected_bandwidth_usage * SOFT_LIM_MINUTES;
if (acct_max > expected_usage && acct_max - expected_usage > soft_limit)
soft_limit = acct_max - expected_usage;
}
if (!soft_limit)
return 0;
return n_bytes_read_in_interval >= soft_limit
|| n_bytes_written_in_interval >= soft_limit;
}
/** Return true iff we have sent/received almost all the bytes we are willing
* to send/receive this interval. */
static int
hibernate_soft_limit_reached(void)
{
uint64_t soft_limit = DBL_TO_U64(U64_TO_DBL(get_options()->AccountingMax)
* .95);
if (!soft_limit)
return 0;
return n_bytes_read_in_interval >= soft_limit
|| n_bytes_written_in_interval >= soft_limit;
}
/** Compute the absolute and relative overhead of using the cpuworker
* framework for onionskins of type <b>onionskin_type</b>.*/
static int
get_overhead_for_onionskins(uint32_t *usec_out, double *frac_out,
uint16_t onionskin_type)
{
uint64_t overhead;
*usec_out = 0;
*frac_out = 0.0;
if (onionskin_type > MAX_ONION_HANDSHAKE_TYPE) /* should be impossible */
return -1;
if (onionskins_n_processed[onionskin_type] == 0 ||
onionskins_usec_internal[onionskin_type] == 0 ||
onionskins_usec_roundtrip[onionskin_type] == 0)
return -1;
overhead = onionskins_usec_roundtrip[onionskin_type] -
onionskins_usec_internal[onionskin_type];
*usec_out = (uint32_t)(overhead / onionskins_n_processed[onionskin_type]);
*frac_out = U64_TO_DBL(overhead) / onionskins_usec_internal[onionskin_type];
return 0;
}
