SYNOPSISbw_mmap_rd [ -P <parallelism> ] [ -W <warmups> ] [ -N <repetitions> ] size file
DESCRIPTIONbw_mmap_rd creates a memory mapping to the file and then reads the mapping in an unrolled loop similar to that used in bw_mem_rd(8). The benchmark is intended to be used on a file that is in memory, i.e., the benchmark is a reread benchmark. Other file benchmarking can be done with lmdd(8).
The size specification may end with ``k'' or ``m'' to mean kilobytes (* 1024) or megabytes (* 1024 * 1024).
OUTPUTOutput format is "%0.2f %.2f\n", megabytes, megabytes_per_second, i.e.,
MEMORY UTILIZATIONThis benchmark should move approximately the reported amount of memory.
ACKNOWLEDGEMENTFunding for the development of this tool was provided by Sun Microsystems Computer Corporation.
AUTHORCarl Staelin and Larry McVoy
Comments, suggestions, and bug reports are always welcome.