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< div class = "section" id = "h2load-http-2-benchmarking-tool-how-to" >
< h1 > h2load - HTTP/2 benchmarking tool - HOW-TO< a class = "headerlink" href = "#h2load-http-2-benchmarking-tool-how-to" title = "Permalink to this headline" > ¶< / a > < / h1 >
< p > h2load is benchmarking tool for HTTP/2. If built with
spdylay (< a class = "reference external" href = "http://tatsuhiro-t.github.io/spdylay/" > http://tatsuhiro-t.github.io/spdylay/< / a > ) library, it also
supports SPDY protocol. It supports SSL/TLS and clear text for both
HTTP/2 and SPDY.< / p >
< div class = "section" id = "basic-usage" >
< h2 > Basic Usage< a class = "headerlink" href = "#basic-usage" title = "Permalink to this headline" > ¶< / a > < / h2 >
< p > In order to set benchmark settings, specify following 3 options.< / p >
< dl class = "docutils" >
< dt > < tt class = "docutils literal" > < span class = "pre" > -n< / span > < / tt > < / dt >
< dd > The number of total requests. Default: 1< / dd >
< dt > < tt class = "docutils literal" > < span class = "pre" > -c< / span > < / tt > < / dt >
< dd > The number of concurrent clients. Default: 1< / dd >
< dt > < tt class = "docutils literal" > < span class = "pre" > -m< / span > < / tt > < / dt >
< dd > The max concurrent streams to issue per client.
If < tt class = "docutils literal" > < span class = "pre" > auto< / span > < / tt > is given, the number of given URIs is used.
Default: < tt class = "docutils literal" > < span class = "pre" > auto< / span > < / tt > < / dd >
< / dl >
< p > Here is a command-line to perform benchmark to URI https://localhost
using total 100000 requests, 100 concurrent clients and 10 max
concurrent streams:< / p >
< div class = "highlight-c" > < div class = "highlight" > < pre > $ h2load -n100000 -c100 -m10 https://localhost
< / pre > < / div >
< / div >
< p > The benchmarking result looks like this:< / p >
< div class = "highlight-c" > < div class = "highlight" > < pre > < span class = "n" > finished< / span > < span class = "n" > in< / span > < span class = "mi" > 0< / span > < span class = "n" > sec< / span > < span class = "p" > ,< / span > < span class = "mi" > 385< / span > < span class = "n" > millisec< / span > < span class = "n" > and< / span > < span class = "mi" > 851< / span > < span class = "n" > microsec< / span > < span class = "p" > ,< / span > < span class = "mi" > 2591< / span > < span class = "n" > req< / span > < span class = "o" > /< / span > < span class = "n" > s< / span > < span class = "p" > ,< / span > < span class = "mi" > 1689< / span > < span class = "n" > kbytes< / span > < span class = "o" > /< / span > < span class = "n" > s< / span >
< span class = "nl" > requests:< / span > < span class = "mi" > 1000< / span > < span class = "n" > total< / span > < span class = "p" > ,< / span > < span class = "mi" > 1000< / span > < span class = "n" > started< / span > < span class = "p" > ,< / span > < span class = "mi" > 1000< / span > < span class = "n" > done< / span > < span class = "p" > ,< / span > < span class = "mi" > 1000< / span > < span class = "n" > succeeded< / span > < span class = "p" > ,< / span > < span class = "mi" > 0< / span > < span class = "n" > failed< / span > < span class = "p" > ,< / span > < span class = "mi" > 0< / span > < span class = "n" > errored< / span >
< span class = "n" > status< / span > < span class = "n" > codes< / span > < span class = "o" > :< / span > < span class = "mi" > 1000< / span > < span class = "mi" > 2< / span > < span class = "n" > xx< / span > < span class = "p" > ,< / span > < span class = "mi" > 0< / span > < span class = "mi" > 3< / span > < span class = "n" > xx< / span > < span class = "p" > ,< / span > < span class = "mi" > 0< / span > < span class = "mi" > 4< / span > < span class = "n" > xx< / span > < span class = "p" > ,< / span > < span class = "mi" > 0< / span > < span class = "mi" > 5< / span > < span class = "n" > xx< / span >
< span class = "nl" > traffic:< / span > < span class = "mi" > 667500< / span > < span class = "n" > bytes< / span > < span class = "n" > total< / span > < span class = "p" > ,< / span > < span class = "mi" > 28700< / span > < span class = "n" > bytes< / span > < span class = "n" > headers< / span > < span class = "p" > ,< / span > < span class = "mi" > 612000< / span > < span class = "n" > bytes< / span > < span class = "n" > data< / span >
< / pre > < / div >
< / div >
< p > The number of < tt class = "docutils literal" > < span class = "pre" > failed< / span > < / tt > is the number of requests returned with non
2xx status. The number of < tt class = "docutils literal" > < span class = "pre" > error< / span > < / tt > is the number of < tt class = "docutils literal" > < span class = "pre" > failed< / span > < / tt > plus
the number of requests which failed with connection error.< / p >
< p > The number of < tt class = "docutils literal" > < span class = "pre" > total< / span > < / tt > in < tt class = "docutils literal" > < span class = "pre" > traffic< / span > < / tt > is the received application
data. If SSL/TLS is used, this number is calculated after decryption.
The number of < tt class = "docutils literal" > < span class = "pre" > headers< / span > < / tt > is the sum of payload size of response
HEADERS (or SYN_REPLY for SPDY). This number comes before
decompressing header block. The number of < tt class = "docutils literal" > < span class = "pre" > data< / span > < / tt > is the sum of
response body.< / p >
< / div >
< div class = "section" id = "flow-control" >
< h2 > Flow Control< a class = "headerlink" href = "#flow-control" title = "Permalink to this headline" > ¶< / a > < / h2 >
< p > HTTP/2 and SPDY/3 or later employ flow control and it may affect
benchmarking results. To adjust receiver flow control window size,
there is following options:< / p >
< dl class = "docutils" >
< dt > < tt class = "docutils literal" > < span class = "pre" > -w< / span > < / tt > < / dt >
< dd > Sets the stream level initial window size to
(2**< N> )-1. For SPDY, 2**< N> is used instead.< / dd >
< dt > < tt class = "docutils literal" > < span class = "pre" > -W< / span > < / tt > < / dt >
< dd > Sets the connection level initial window size to
(2**< N> )-1. For SPDY, if < N> is strictly less
than 16, this option is ignored. Otherwise
2**< N> is used for SPDY.< / dd >
< / dl >
< / div >
< div class = "section" id = "multi-threading" >
< h2 > Multi-Threading< a class = "headerlink" href = "#multi-threading" title = "Permalink to this headline" > ¶< / a > < / h2 >
< p > Sometimes benchmarking client itself becomes a bottleneck. To remedy
this situation, use < tt class = "docutils literal" > < span class = "pre" > -t< / span > < / tt > option to specify the number of native
thread to use.< / p >
< dl class = "docutils" >
< dt > < tt class = "docutils literal" > < span class = "pre" > -t< / span > < / tt > < / dt >
< dd > The number of native threads. Default: 1< / dd >
< / dl >
< / div >
< div class = "section" id = "selecting-protocol-for-clear-text" >
< h2 > Selecting protocol for clear text< a class = "headerlink" href = "#selecting-protocol-for-clear-text" title = "Permalink to this headline" > ¶< / a > < / h2 >
< p > By default, if http:// URI is given, HTTP/2 protocol is used. To
change the protocol to use for clear text, use < tt class = "docutils literal" > < span class = "pre" > -p< / span > < / tt > option.< / p >
< / div >
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< h2 > Multiple URIs< a class = "headerlink" href = "#multiple-uris" title = "Permalink to this headline" > ¶< / a > < / h2 >
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< p class = "last" > Please note that h2load uses sheme, host and port in the first URI
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