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I'm using httperf from a large ec2 instance with ubuntu 10.04 (no other software installed).

When I test without --hog the tests run however when I use --hog the tests never end

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2 Answers

up vote 3 down vote

I had the same problem but the patch provided in Niro's answer didn't solve the issue for me. The issue ended up being TCP connection reuse and recycling. To fix this I followed instructions found on: http://www.speedguide.net/articles/linux-tweaking-121

The relevant instructions were to run the following commands:

  • echo 1 > /proc/sys/net/ipv4/tcp_tw_recycle
  • echo 1 > /proc/sys/net/ipv4/tcp_tw_reuse
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up vote 2 down vote accepted

This is a bug in httperf. found the patch to solve it here:

http://code.google.com/p/httperf/issues/attachmentText?id=15&aid=150000000&name=httperf-0.9.0-hogfix.patch&token=6d1c86ff869b68ec6b06b51adee5f853

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applying this patch to 0.9.0 source worked for me on ec2, ubuntu11.10. tcp_tw_reuse & recycle did not make a difference. Linux ip-10-7-203-83 3.0.0-14-virtual #23-Ubuntu SMP Mon Nov 21 21:09:11 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux – spazm Oct 24 '12 at 5:08
patch applies on current 0.9.1 svn code as well, applying from line 901. Unpatched 0.9.1-svn did not work. Patched 0.9.1-svn did work. – spazm Oct 24 '12 at 5:17

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