IBV_RATE_TO_MULT(3) Libibverbs Programmer's Manual IBV_RATE_TO_MULT(3)NAME
ibv_rate_to_mult - convert IB rate enumeration to multiplier of 2.5 Gbit/sec
mult_to_ibv_rate - convert multiplier of 2.5 Gbit/sec to an IB rate enumeration
SYNOPSIS
#include <infiniband/verbs.h>
int ibv_rate_to_mult(enum ibv_rate rate);
enum ibv_rate mult_to_ibv_rate(int mult);
DESCRIPTION
ibv_rate_to_mult() converts the IB transmission rate enumeration rate to a multiple of 2.5 Gbit/sec (the base rate). For example, if rate
is IBV_RATE_5_GBPS, the value 2 will be returned (5 Gbit/sec = 2 * 2.5 Gbit/sec).
mult_to_ibv_rate() converts the multiplier value (of 2.5 Gbit/sec) mult to an IB transmission rate enumeration. For example, if mult is 2,
the rate enumeration IBV_RATE_5_GBPS will be returned.
RETURN VALUE
ibv_rate_to_mult() returns the multiplier of the base rate 2.5 Gbit/sec.
mult_to_ibv_rate() returns the enumeration representing the IB transmission rate.
SEE ALSO ibv_query_port(3)AUTHORS
Dotan Barak <dotanba@gmail.com>
libibverbs 2006-10-31 IBV_RATE_TO_MULT(3)
Check Out this Related Man Page
PPSRATECHECK(9) BSD Kernel Developer's Manual PPSRATECHECK(9)NAME
ppsratecheck -- function to help implement rate-limited actions
SYNOPSIS
#include <sys/time.h>
int
ppsratecheck(struct timeval *lasttime, int *curpps, int maxpps);
DESCRIPTION
The ppsratecheck() function provides easy way to perform packet-per-sec, or event-per-sec, rate limitation. The motivation for implementing
ppsratecheck() was to provide a mechanism that could be used to add rate limitation to network packet output. For certain network packets,
we may want to impose rate limitation, to avoid denial-of-service attack possibilities.
maxpps specifies maximum permitted packets, or events, per second. If ppsratecheck() is called more than maxpps times in a given one second
period, the function will return 0, indicating that we exceeded the limit. If we are below the limit, the function will return 1. If maxpps
is set to 0, the function will always return 0 (no packets/events are permitted). Negative maxpps indicates that rate limitation is dis-
abled, and ppsratecheck will always return 1.
curpps and lasttime are used to maintain the number of recent calls. curpps will be incremented every time ppsratecheck() is called, and
will be reset whenever necessary.
SEE ALSO log(9), printf(9), ratecheck(9), time_second(9)HISTORY
The ppsratecheck() function appeared in NetBSD 1.5.
BSD August 3, 2000 BSD
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