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README
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README
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-*-Mode: outline-*-
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* Building httperf
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## Building httperf
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This release of httperf is using the standard GNU configuration
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mechanism. The following steps can be used to build it:
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@ -80,7 +79,7 @@ Solaris 8 (UltraSparc 64-bit)
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It should be straight-forward to build httperf on other platforms, please report
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any build problems to the mailing list along with the platform specifications.
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* Mailing list
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## Mailing list
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A mailing list has been set up to encourage discussions among the
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httperf user community. This list is managed by majordomo. To
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@ -91,7 +90,7 @@ subscribe to the list, send a mail containing the body:
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to majordomo@linux.hpl.hp.com. To post an article to the list, send
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it directly to httperf@linux.hpl.hp.com.
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* Running httperf
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## Running httperf
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IMPORTANT: It is crucial to run just one copy of httperf per client
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machine. httperf sucks up all available CPU time on a machine. It is
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@ -101,11 +100,11 @@ ensure that it can generate the desired workload with good accuracy,
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so do not try to change this without fully understanding what the
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issues are.
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** Examples
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### Examples
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The simplest way to invoke httperf is with a command line of the form:
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httperf --server wailua --port 6800
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> httperf --server wailua --port 6800
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This command results in httperf attempting to make one request for URL
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http://wailua:6800/. After the reply is received, performance
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@ -124,7 +123,7 @@ value using the --timeout option. In the example below, a timeout of
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one second is specified (the ramification of this option will be
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explained later):
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httperf --server wailua --port 6800 --num-conns 100 --rate 10 --timeout 1
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> httperf --server wailua --port 6800 --num-conns 100 --rate 10 --timeout 1
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The performance statistics printed by httperf at the end of the test
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might look like this:
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@ -157,7 +156,7 @@ received from the server ("Reply"), miscellaneous results relating to
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the CPU time and network bandwidth used, and, finally, a summary of
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errors encountered ("Errors"). Let's discuss each in turn:
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** "Total" Results
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## "Total" Results
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The "Total" line summarizes how many TCP connections were initiated by
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the client, how many requests it sent, how many replies it received,
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@ -169,7 +168,7 @@ replies were received. It also shows that total test-duration was
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Total: connections 100 requests 100 replies 100 test-duration 9.905 s
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** "Connection" Results
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## "Connection" Results
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These results convey information related to the TCP connections that
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are used to communicate with the web server.
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@ -221,7 +220,7 @@ responses.
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Connection length [replies/conn]: 1.000
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** "Request" Results
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## "Request" Results
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The first line in the "Request"-related results give the rate at which
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HTTP requests were issued and the period-length that the rate
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@ -243,7 +242,7 @@ the line show below, the average request size was 57 bytes.
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Request size [B]: 57.0
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** "Reply" Results
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## "Reply" Results
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For simple measurements, the section with the "Reply" results is
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probably the most interesting one. The first line gives statistics on
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@ -292,7 +291,7 @@ were "successful" replies as they contained a status code of 200
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Reply status: 1xx=0 2xx=100 3xx=0 4xx=0 5xx=0
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** Miscellaneous Results
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## Miscellaneous Results
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This section starts with a summary of the CPU time the client
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consumed. The line below shows that 2.71 seconds were spent executing
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@ -322,7 +321,7 @@ network payload only (i.e., it doesn't account for protocol headers)
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and does not take into account retransmissions that may occur at the
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TCP level.
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** "Errors"
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## "Errors"
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The final section contains statistics on the errors that occurred
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during the test. The "total" figure shows the total number of errors
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@ -379,7 +378,7 @@ The meaning of each error is described below:
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debug support and specifying option --debug 1.
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** Selecting appropriate timeout values
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## Selecting appropriate timeout values
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Since the client machine has only a limited set of resource available,
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it cannot sustain arbitrarily high HTTP request rates. One limit is
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