NAME

milli, micro, nano, mb, kb - the lmbench reporting subsystem

SYNOPSIS

#include ``lmbench.h''

void milli(char *s, uint64 n)

void micro(char *s, uint64 n)

void nano(char *s, uint64 n)

void mb(uint64 bytes)

void kb(uint64 bytes)

DESCRIPTION

Creating benchmarks using the lmbench timing harness is easy. Since it is so easy to measure performance using lmbench, it is possible to quickly answer questions that arise during system design, development, or tuning. For example, image processing

There are two attributes that are critical for performance, latency and bandwidth, and lmbench's timing harness makes it easy to measure and report results for both. The measurement interface, benchmp is the same, but the reporting functions are different. Latency is usually important for frequently executed operations, and bandwidth is usually important when moving large chunks of data.

void milli(char *s, uint64 n)

print out the time per operation in milli-seconds. n is the number of operations during the timing interval, which is passed as a parameter because each loop_body can contain several operations.

void micro(char *s, uint64 n)

print the time per opertaion in micro-seconds.

void nano(char *s, uint64 n)

print the time per operation in nano-seconds.

void mb(uint64 bytes)

print the bandwidth in megabytes per second.

void kb(uint64 bytes)

print the bandwidth in kilobytes per second.

FUTURES

Development of lmbench is continuing.

SEE ALSO

lmbench(8), lmbench(3), timing(3), results(3)

AUTHOR

Carl Staelin and Larry McVoy

Comments, suggestions, and bug reports are always welcome.