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DBS is a useful tool chest for evaluating TCP implementations, specifically flow control, retransmission control and congestion avoidance. -It can treat multiple TCP connections spanning multiple hosts simultaneously, and -It has the capability of measuring the changes of application level throughput at every data transmission.

Dhrystone is a synthetic computing benchmark program developed in 1984 by Reinhold P. Weicker intended to be representative of system (integer) programming. The Dhrystone grew to become representative of general processor (CPU) performance. DMIPS value is result of dhrystone test divided by 1757, results are often reported in DMIPS/MHz. For more information, see http://en.wikipedia.org/wiki/Dhrystone.

Dbench is a filesystem benchmark that generates load patterns similar to those of the commercial Netbench benchmark, but without requiring a lab of Windows load generators to run. It is now considered a de-facto standard for generating load on the Linux VFS.

dkftpbench is an FTP benchmark program inspired by SPECweb99. The result of the benchmark is a number-of-simultaneous-users rating; after running the benchmark properly, you have a good idea how many simultaneous dialup clients a server can support. The target bandwidth per client is set at 28.8 kilobits/second to model dialup users; this is important for servers on the real Internet, which often serve thousands of clients on only 10 MBits/sec of bandwidth.

This integer benchmark solves positions in the game of connect-4, as played on a vertical 7x6 board. This takes about 10 minutes on contemporary PCs.

Expedite is meant to be a detailed and comprehensive benchmark suite for Evas.

Fio is an I/O testing tool that will spawn a number of threads or processes doing a particular type of I/O action as specified by the user. Fio can be driven by a 'job file' describing the I/O load one wants to simulate.

flops.c is a C program which attempts to estimate your system's floating- point 'MFLOPS' rating for the FADD, FSUB, FMUL, and FDIV operations based on specific 'instruction mixes' (discussed below). The program provides an estimate of PEAK MFLOPS performance by making maximal use of register variables with minimal interaction with main memory. The execution loops are all small so that they will fit in any cache. The flops.c execution modules include various percent weightings of FDIV's (from 0% to 25% FDIV's) so that the range of performance can be obtained when using FDIV's. FDIV's, being computationally more intensive than FADD's or FMUL's, can impact performance considerably on some systems.

forkbomb is tool for stress testing. It can create many processes using fork(), bring up some zombies, allocate memory using realloc() and accesses this memory. It has different switches for fine-tuning operation. While classic fork() bomb is good only for fun and QA release testing, running multiple memory-eaters can be useful for determining maximum memory which can be given to servers (bind or squid) without taking machine down. You can test different operation systems with this tool and see how they are handling the load.

Flowgrind is an advanced TCP traffic generator for testing and benchmarking Linux, FreeBSD, and Mac OS X TCP/IP stacks. In contrast to similar tools like iperf or netperf it features a distributed architecture, where throughput and other metrics are measured between arbitrary flowgrind server processes.