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.

AUTHOR

Carl Staelin and Larry McVoy

Comments, suggestions, and bug reports are always welcome.