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rte_random.h(3) DPDK rte_random.h(3) NAME rte_random.h SYNOPSIS #include <stdint.h> Functions void rte_srand (uint64_t seedval) uint64_t rte_rand (void) uint64_t rte_rand_max (uint64_t upper_bound) double rte_drand (void) Detailed Description Pseudo-random Generators in RTE Definition in file rte_random.h. Function Documentation void rte_srand (uint64_t seedval) Seed the pseudo-random generator. The generator is automatically seeded by the EAL init with a timer value. It may need to be re-seeded by the user with a real random value. This function is not multi-thread safe in regards to other rte_srand() calls, nor is it in relation to concurrent rte_rand(), rte_rand_max() or rte_drand() calls. Parameters seedval The value of the seed. uint64_t rte_rand (void) Get a pseudo-random value. The generator is not cryptographically secure. rte_rand(), rte_rand_max() and rte_drand() are multi-thread safe, with the exception that they may not be called by multiple unregistered non- EAL threads in parallel. Returns A pseudo-random value between 0 and (1<<64)-1. uint64_t rte_rand_max (uint64_t upper_bound) Generates a pseudo-random number with an upper bound. This function returns an uniformly distributed (unbiased) random number less than a user-specified maximum value. rte_rand(), rte_rand_max() and rte_drand() are multi-thread safe, with the exception that they may not be called by multiple unregistered non- EAL threads in parallel. Parameters upper_bound The upper bound of the generated number. Returns A pseudo-random value between 0 and (upper_bound-1). double rte_drand (void) Generates a pseudo-random floating point number. This function returns a non-negative double-precision floating random number uniformly distributed over the interval [0.0, 1.0). The generator is not cryptographically secure. rte_rand(), rte_rand_max() and rte_drand() are multi-thread safe, with the exception that they may not be called by multiple unregistered non- EAL threads in parallel. Returns A pseudo-random value between 0 and 1.0. Author Generated automatically by Doxygen for DPDK from the source code. Version 25.11.0 Thu Jun 11 2026 rte_random.h(3)
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