471 lines
14 KiB
Groff
471 lines
14 KiB
Groff
.\" Man page generated from reStructuredText.
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.
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.TH "H2LOAD" "1" "Mar 07, 2019" "1.37.0" "nghttp2"
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.SH NAME
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h2load \- HTTP/2 benchmarking tool
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.
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..
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.SH SYNOPSIS
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.sp
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\fBh2load\fP [OPTIONS]... [URI]...
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.SH DESCRIPTION
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.sp
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benchmarking tool for HTTP/2 server
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.INDENT 0.0
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.TP
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.B <URI>
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Specify URI to access. Multiple URIs can be specified.
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URIs are used in this order for each client. All URIs
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are used, then first URI is used and then 2nd URI, and
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so on. The scheme, host and port in the subsequent
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URIs, if present, are ignored. Those in the first URI
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are used solely. Definition of a base URI overrides all
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scheme, host or port values.
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.UNINDENT
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.SH OPTIONS
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.INDENT 0.0
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.TP
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.B \-n, \-\-requests=<N>
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Number of requests across all clients. If it is used
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with \fI\%\-\-timing\-script\-file\fP option, this option specifies
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the number of requests each client performs rather than
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the number of requests across all clients. This option
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is ignored if timing\-based benchmarking is enabled (see
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\fI\%\-\-duration\fP option).
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.sp
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Default: \fB1\fP
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-c, \-\-clients=<N>
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Number of concurrent clients. With \fI\%\-r\fP option, this
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specifies the maximum number of connections to be made.
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.sp
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Default: \fB1\fP
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-t, \-\-threads=<N>
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Number of native threads.
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.sp
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Default: \fB1\fP
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-i, \-\-input\-file=<PATH>
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Path of a file with multiple URIs are separated by EOLs.
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This option will disable URIs getting from command\-line.
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If \(aq\-\(aq is given as <PATH>, URIs will be read from stdin.
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URIs are used in this order for each client. All URIs
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are used, then first URI is used and then 2nd URI, and
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so on. The scheme, host and port in the subsequent
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URIs, if present, are ignored. Those in the first URI
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are used solely. Definition of a base URI overrides all
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scheme, host or port values.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-m, \-\-max\-concurrent\-streams=<N>
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Max concurrent streams to issue per session. When
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http/1.1 is used, this specifies the number of HTTP
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pipelining requests in\-flight.
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.sp
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Default: \fB1\fP
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-w, \-\-window\-bits=<N>
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Sets the stream level initial window size to (2**<N>)\-1.
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.sp
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Default: \fB30\fP
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-W, \-\-connection\-window\-bits=<N>
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Sets the connection level initial window size to
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(2**<N>)\-1.
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.sp
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Default: \fB30\fP
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-H, \-\-header=<HEADER>
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Add/Override a header to the requests.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-\-ciphers=<SUITE>
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Set allowed cipher list. The format of the string is
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described in OpenSSL ciphers(1).
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.sp
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Default: \fBECDHE\-ECDSA\-AES256\-GCM\-SHA384:ECDHE\-RSA\-AES256\-GCM\-SHA384:ECDHE\-ECDSA\-CHACHA20\-POLY1305:ECDHE\-RSA\-CHACHA20\-POLY1305:ECDHE\-ECDSA\-AES128\-GCM\-SHA256:ECDHE\-RSA\-AES128\-GCM\-SHA256:ECDHE\-ECDSA\-AES256\-SHA384:ECDHE\-RSA\-AES256\-SHA384:ECDHE\-ECDSA\-AES128\-SHA256:ECDHE\-RSA\-AES128\-SHA256\fP
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-p, \-\-no\-tls\-proto=<PROTOID>
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Specify ALPN identifier of the protocol to be used when
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accessing http URI without SSL/TLS.
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Available protocols: h2c and http/1.1
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.sp
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Default: \fBh2c\fP
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-d, \-\-data=<PATH>
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Post FILE to server. The request method is changed to
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POST. For http/1.1 connection, if \fI\%\-d\fP is used, the
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maximum number of in\-flight pipelined requests is set to
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1.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-r, \-\-rate=<N>
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Specifies the fixed rate at which connections are
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created. The rate must be a positive integer,
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representing the number of connections to be made per
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rate period. The maximum number of connections to be
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made is given in \fI\%\-c\fP option. This rate will be
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distributed among threads as evenly as possible. For
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example, with \fI\%\-t\fP2 and \fI\%\-r\fP4, each thread gets 2
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connections per period. When the rate is 0, the program
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will run as it normally does, creating connections at
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whatever variable rate it wants. The default value for
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this option is 0. \fI\%\-r\fP and \fI\%\-D\fP are mutually exclusive.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-\-rate\-period=<DURATION>
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Specifies the time period between creating connections.
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The period must be a positive number, representing the
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length of the period in time. This option is ignored if
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the rate option is not used. The default value for this
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option is 1s.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-D, \-\-duration=<N>
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Specifies the main duration for the measurements in case
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of timing\-based benchmarking. \fI\%\-D\fP and \fI\%\-r\fP are mutually
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exclusive.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-\-warm\-up\-time=<DURATION>
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Specifies the time period before starting the actual
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measurements, in case of timing\-based benchmarking.
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Needs to provided along with \fI\%\-D\fP option.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-T, \-\-connection\-active\-timeout=<DURATION>
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Specifies the maximum time that h2load is willing to
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keep a connection open, regardless of the activity on
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said connection. <DURATION> must be a positive integer,
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specifying the amount of time to wait. When no timeout
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value is set (either active or inactive), h2load will
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keep a connection open indefinitely, waiting for a
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response.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-N, \-\-connection\-inactivity\-timeout=<DURATION>
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Specifies the amount of time that h2load is willing to
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wait to see activity on a given connection. <DURATION>
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must be a positive integer, specifying the amount of
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time to wait. When no timeout value is set (either
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active or inactive), h2load will keep a connection open
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indefinitely, waiting for a response.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-\-timing\-script\-file=<PATH>
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Path of a file containing one or more lines separated by
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EOLs. Each script line is composed of two tab\-separated
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fields. The first field represents the time offset from
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the start of execution, expressed as a positive value of
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milliseconds with microsecond resolution. The second
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field represents the URI. This option will disable URIs
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getting from command\-line. If \(aq\-\(aq is given as <PATH>,
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script lines will be read from stdin. Script lines are
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used in order for each client. If \fI\%\-n\fP is given, it must
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be less than or equal to the number of script lines,
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larger values are clamped to the number of script lines.
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If \fI\%\-n\fP is not given, the number of requests will default
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to the number of script lines. The scheme, host and
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port defined in the first URI are used solely. Values
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contained in other URIs, if present, are ignored.
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Definition of a base URI overrides all scheme, host or
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port values.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-B, \-\-base\-uri=(<URI>|unix:<PATH>)
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Specify URI from which the scheme, host and port will be
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used for all requests. The base URI overrides all
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values defined either at the command line or inside
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input files. If argument starts with "unix:", then the
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rest of the argument will be treated as UNIX domain
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socket path. The connection is made through that path
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instead of TCP. In this case, scheme is inferred from
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the first URI appeared in the command line or inside
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input files as usual.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-\-npn\-list=<LIST>
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Comma delimited list of ALPN protocol identifier sorted
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in the order of preference. That means most desirable
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protocol comes first. This is used in both ALPN and
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NPN. The parameter must be delimited by a single comma
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only and any white spaces are treated as a part of
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protocol string.
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.sp
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Default: \fBh2,h2\-16,h2\-14,http/1.1\fP
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-\-h1
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Short hand for \fI\%\-\-npn\-list\fP=http/1.1
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\fI\%\-\-no\-tls\-proto\fP=http/1.1, which effectively force
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http/1.1 for both http and https URI.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-\-header\-table\-size=<SIZE>
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Specify decoder header table size.
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.sp
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Default: \fB4K\fP
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-\-encoder\-header\-table\-size=<SIZE>
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Specify encoder header table size. The decoder (server)
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specifies the maximum dynamic table size it accepts.
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Then the negotiated dynamic table size is the minimum of
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this option value and the value which server specified.
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.sp
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Default: \fB4K\fP
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-\-log\-file=<PATH>
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Write per\-request information to a file as tab\-separated
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columns: start time as microseconds since epoch; HTTP
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status code; microseconds until end of response. More
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columns may be added later. Rows are ordered by end\-of\-
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response time when using one worker thread, but may
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appear slightly out of order with multiple threads due
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to buffering. Status code is \-1 for failed streams.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-v, \-\-verbose
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Output debug information.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-\-version
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Display version information and exit.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-h, \-\-help
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Display this help and exit.
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.UNINDENT
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.sp
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The <SIZE> argument is an integer and an optional unit (e.g., 10K is
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10 * 1024). Units are K, M and G (powers of 1024).
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.sp
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The <DURATION> argument is an integer and an optional unit (e.g., 1s
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is 1 second and 500ms is 500 milliseconds). Units are h, m, s or ms
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(hours, minutes, seconds and milliseconds, respectively). If a unit
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is omitted, a second is used as unit.
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.SH OUTPUT
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.INDENT 0.0
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.TP
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.B requests
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.INDENT 7.0
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.TP
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.B total
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The number of requests h2load was instructed to make.
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.TP
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.B started
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The number of requests h2load has started.
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.TP
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.B done
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The number of requests completed.
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.TP
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.B succeeded
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The number of requests completed successfully. Only HTTP status
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code 2xx or3xx are considered as success.
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.TP
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.B failed
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The number of requests failed, including HTTP level failures
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(non\-successful HTTP status code).
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.TP
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.B errored
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The number of requests failed, except for HTTP level failures.
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This is the subset of the number reported in \fBfailed\fP and most
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likely the network level failures or stream was reset by
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RST_STREAM.
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.TP
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.B timeout
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The number of requests whose connection timed out before they were
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completed. This is the subset of the number reported in
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\fBerrored\fP\&.
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.UNINDENT
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.TP
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.B status codes
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The number of status code h2load received.
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.TP
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.B traffic
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.INDENT 7.0
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.TP
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.B total
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The number of bytes received from the server "on the wire". If
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requests were made via TLS, this value is the number of decrypted
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bytes.
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.TP
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.B headers
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The number of response header bytes from the server without
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decompression. The \fBspace savings\fP shows efficiency of header
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compression. Let \fBdecompressed(headers)\fP to the number of bytes
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used for header fields after decompression. The \fBspace savings\fP
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is calculated by (1 \- \fBheaders\fP / \fBdecompressed(headers)\fP) *
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100. For HTTP/1.1, this is usually 0.00%, since it does not have
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header compression. For HTTP/2, it shows some insightful numbers.
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.TP
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.B data
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The number of response body bytes received from the server.
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.UNINDENT
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.TP
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.B time for request
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.INDENT 7.0
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.TP
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.B min
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The minimum time taken for request and response.
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.TP
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.B max
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The maximum time taken for request and response.
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.TP
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.B mean
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The mean time taken for request and response.
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.TP
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.B sd
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The standard deviation of the time taken for request and response.
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.TP
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.B +/\- sd
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The fraction of the number of requests within standard deviation
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range (mean +/\- sd) against total number of successful requests.
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.UNINDENT
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.TP
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.B time for connect
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.INDENT 7.0
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.TP
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.B min
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The minimum time taken to connect to a server including TLS
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handshake.
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.TP
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.B max
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The maximum time taken to connect to a server including TLS
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handshake.
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.TP
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.B mean
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The mean time taken to connect to a server including TLS
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handshake.
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.TP
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.B sd
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The standard deviation of the time taken to connect to a server.
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.TP
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.B +/\- sd
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The fraction of the number of connections within standard
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deviation range (mean +/\- sd) against total number of successful
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connections.
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.UNINDENT
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.TP
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.B time for 1st byte (of (decrypted in case of TLS) application data)
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.INDENT 7.0
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.TP
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.B min
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The minimum time taken to get 1st byte from a server.
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.TP
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.B max
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The maximum time taken to get 1st byte from a server.
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.TP
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.B mean
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The mean time taken to get 1st byte from a server.
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.TP
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.B sd
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The standard deviation of the time taken to get 1st byte from a
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server.
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.TP
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.B +/\- sd
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The fraction of the number of connections within standard
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deviation range (mean +/\- sd) against total number of successful
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connections.
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.UNINDENT
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.TP
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.B req/s
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.INDENT 7.0
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.TP
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.B min
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The minimum request per second among all clients.
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.TP
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.B max
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The maximum request per second among all clients.
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.TP
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.B mean
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The mean request per second among all clients.
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.TP
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.B sd
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The standard deviation of request per second among all clients.
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server.
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.TP
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.B +/\- sd
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The fraction of the number of connections within standard
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deviation range (mean +/\- sd) against total number of successful
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connections.
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.UNINDENT
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.UNINDENT
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.SH FLOW CONTROL
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.sp
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h2load sets large flow control window by default, and effectively
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disables flow control to avoid under utilization of server
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performance. To set smaller flow control window, use \fI\%\-w\fP and
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\fI\%\-W\fP options. For example, use \fB\-w16 \-W16\fP to set default
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window size described in HTTP/2 protocol specification.
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.SH SEE ALSO
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.sp
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\fBnghttp(1)\fP, \fBnghttpd(1)\fP, \fBnghttpx(1)\fP
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.SH AUTHOR
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Tatsuhiro Tsujikawa
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.SH COPYRIGHT
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2012, 2015, 2016, Tatsuhiro Tsujikawa
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.\" Generated by docutils manpage writer.
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.
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