netperf

netperf
Name	netperf
Author	Hewlett-Packard Laboratories
Initial release	1992
Latest release	2020s
Operating system	FreeBSD, NetBSD, OpenBSD, Linux (kernel), Solaris (operating system), Microsoft Windows
Genre	Benchmarking software
License	BSD license

netperf

Netperf is a network benchmarking tool originally developed at Hewlett-Packard Laboratories for measuring throughput and latency between hosts. It provides micro-benchmarks for TCP, UDP, and other transport protocols and is widely used by practitioners from Intel Corporation research teams, Cisco Systems performance groups, and academic labs at Massachusetts Institute of Technology and Stanford University for validating network stack changes. Netperf has been cited in papers from conferences such as the USENIX Annual Technical Conference and the ACM SIGCOMM symposium.

Overview

Netperf measures network performance using client–server tests that exercise Transmission Control Protocol and User Datagram Protocol paths, including socket extensions and kernel bypass mechanisms. The project evolved alongside operating system networking subsystems maintained by teams at BSDCan-affiliated projects and contributors from The Open Group vendors. It is commonly used in environments involving Data Center vendors like Microsoft Corporation and Google LLC to characterize effects of NIC drivers, offloads, and virtualization stacks.

Features and Capabilities

Netperf implements tests that quantify metrics such as transactional request/response latency, streaming throughput, and connection setup rates used by engineers at Intel Corporation and Arm Holdings silicon design groups. It supports measurement of socket options introduced by standards bodies such as the Internet Engineering Task Force and leverages kernel interfaces from Linux (kernel) and the BSD family. Advanced capabilities include support for zero-copy APIs used by DPDK-based applications, TLS offload interactions observed in deployments by Cloudflare, and precise timing useful for work at Lawrence Berkeley National Laboratory network research.

Usage and Command-Line Options

Netperf is typically invoked from shell environments managed by administrators at Facebook, Inc. and Amazon Web Services to script repeatable trials. Common options allow selection of test types, buffer sizes, and durations used in benchmarking workflows at Cisco Systems labs. Command-line flags control target host, test parameterization, and output formats compatible with tooling from Nagios and Prometheus. Integrations with continuous benchmarking infrastructures at organizations such as Red Hat and Canonical (company) use netperf invocations in automated pipelines.

Benchmarks and Test Types

Provided tests include bulk-transfer tests comparable with workloads studied at Stanford University networking groups, request/response measurements akin to microservices scenarios evaluated by Netflix, Inc., and connection-rate tests relevant to load balancer research by F5 Networks. Specific test suites exercise TCP_CORK-style coalescing behaviors, UDP loss and jitter characteristics similar to evaluations performed by Cisco Systems, and scatter/gather I/O scenarios used in research at University of California, Berkeley.

Implementation and Architecture

Netperf follows a client-server architecture with a small daemon that accepts control connections and spawns worker processes; design patterns are similar to benchmarking tools from The Apache Software Foundation and instrumentation frameworks from GNU Project. The codebase is predominantly C and interfaces with socket APIs provided in POSIX-compliant stacks maintained by The FreeBSD Project and Linux kernel contributors. The architecture allows modular addition of test cases and hooks for kernel bypass libraries such as DPDK and user-level networking projects promoted at conferences like NetDev.

Performance Results and Comparisons

Independent evaluations by engineering teams at Intel Corporation and benchmarking groups at Red Hat compare netperf results to other tools like those from Iperf authors and microbenchmark suites developed at ETH Zurich. Results often highlight differences driven by driver offloads, interrupt mitigation strategies pioneered by Intel Corporation, and virtualization effects documented by VMware, Inc. researchers. Published comparisons in proceedings of IEEE INFOCOM and ACM SIGCOMM demonstrate how tuning TCP stacks on Linux (kernel) or FreeBSD can change throughput and latency numbers reported by netperf.

Development and Licensing

Netperf has been developed by contributors affiliated with Hewlett-Packard Laboratories, open source volunteers, and researchers from institutions such as Lawrence Berkeley National Laboratory. Its permissive BSD license has enabled use in commercial products and integration by vendors including Cisco Systems and Intel Corporation. Ongoing maintenance is coordinated via community repositories and mailing lists frequented by developers from The FreeBSD Project, NetBSD maintainers, and other open source networking communities.

Category:Benchmarking software