Version: 0.6.8.0 Released: 2018-02-22 Source: https://github.com/aixtools/attcp or http://download.aixtools.net/dist/attcp-0.6.8.tar.gz
The packaged version needs AIX 6.1 TL6 and later.
Test TCP (TTCP) is a command-line sockets-based benchmarking tool for measuring TCP and UDP performance between two systems. The program was originally developed for the BSD operating system in 1984. The original TTCP and sources are in the public domain with copies available from many anonymous FTP sites (e.g., ftp://ftp.sgi.com/sgi/src/ttcp/)
--Michael Felt (talk) 17:03, 25 April 2017 (UTC) corrected a bug on calculating the "bits" used. v0.6.6.1 --Michael Felt (talk) 09:39, 19 April 2017 (UTC) ATTCP is now multi-threaded. The default is one thread (-t 1). You specify the number of threads to create using -t XX, e.g., -t 8 creates 8 threads.
The util 'speedfrom' is usually faster (more throughput) that 'speedto' - but also needs more physc, on average. I need to figure out why 'sending' by attcp is slower than the dump ttcps util that just writes it's heart out.
However, for today I am mainly interested in your feedback and questions re: the new attcp!
ATTPC (for Another Test TCP) is now repackaged in "autotools" format, and also available via github. For suggestions, pulls, etc post on http://forums.rootvg.net/aixtools/attcp-aix-test-tcp-program
Changed the port numbers to be less than udp_ephemeral_low and udp_ephemeral_low.
When using the option -vv for interface statistics you may see smaller numbers on a per-interface level than the total number. There is a problem in the libperfapi data collection for the 64-bit counters - the high-order 32-bits is does not increase when the lower-order 32-bit number reaches 0xFFFFFFFFL and then becomes 0x00000000L. On AIX 6.1 and later this is accurate (and maybe even on AIX5.3 TL12 - AIX 5.3 has been tested on TL7).
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