[dpdk-dev] [Bug 276] rte_rand() bit 31 and 63 are always zero

[bugzilla at dpdk.org]

https://bugs.dpdk.org/show_bug.cgi?id=276

            Bug ID: 276
           Summary: rte_rand() bit 31 and 63 are always zero
           Product: DPDK
           Version: 19.05
          Hardware: All
                OS: All
            Status: CONFIRMED
          Severity: normal
          Priority: Normal
         Component: core
          Assignee: dev at dpdk.org
          Reporter: mattias.ronnblom at ericsson.com
  Target Milestone: ---

rte_rand() is specified as returning a 64-bit pseudo-random number, but only
returns 62 bit worth of randomness.

The implementation uses two lrand48() calls, which each returns a 31-bit random
number. This results in bit 31 and 63 always being zero.

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