uperf

If you're looking for an advanced network performance tool, look no further than uperf. This impressive solution supports the modeling and replay of various networking patterns and was developed by the Performance Applications Engineering group at Sun Microsystems. You'll be pleased to know that uperf is available under the GNU General Public License Version 3, giving you the flexibility you need to customize it to your needs.

One of the key benefits of uperf is that it represents the next generation of benchmarking tools (like filebench). Instead of relying on a fixed benchmark or workload, you can provide a description or model of the workload, and the tool generates the load according to the model you've created. This feature offers incredible flexibility and allows you to change various parameters and protocols while analyzing the effect of these changes on your model. Additionally, you can study the effects of interleaving CPU activity, think times, or the use of SSL instead of TCP, among many other things.

With uperf, distilling a benchmark or workload into a model is a breeze. You can change the scale of the workload and perform other modifications as needed without any hassle. These features make uperf an ideal tool for professionals who need flexibility and control over their network performance testing. If you're looking for an advanced, customizable network performance tool, look no further than uperf.