Provided by: sockperf_3.6-2build1_amd64 bug

NAME

       sockperfSockPerf is a tool for network performance measurement written in C++.

1. SUMMARY

       SockPerf is a network testing tool oriented to measure network latency and also spikes of
       network latency. Tool can create UDP/TCP data streams and measure the throughput and
       latency of a network that is carrying them. SockPerf allows the user to define different
       parameters that can be used for testing a network, or alternately for optimizing or tuning
       a network. Tool provides a client and server functionality, and can measure the throughput
       and latency between the two end-points, either unidirectionally or bidirectionally. This
       utility can be used in Linux systems.

2. INTRODUCTION

       People are often concerned about measuring the maximum data throughput rate of a
       communications link or network access. A typical method of performing a measurement is to
       transfer a 'large' file and measure the time taken to do so. The throughput is then
       calculated by dividing the file size by the time to get the throughput in megabits,
       kilobits, or bits per second. Unfortunately, the results of such an exercise will result
       in the goodput which is less than the maximum throughput, leading to people believing that
       their communications link is not operating correctly. In fact, there are many overheads
       accounted for in good case in addition to transmission overheads, including latency, TCP
       Receive Window size and machine limitations, which means the calculated goodput does not
       reflect the maximum achievable throughput.

       Another important thing of tool capacity is latency measurement. Latency - is the time it
       takes packet to go from user space program on one machine to user space program on another
       machine. Being able to quantify latency in terms other than millisecond response time is
       important when determining the quality of a network. One of available tool that can help
       administrators do just that is Sockperf.

       SockPerf works as an on-demand client and server test. How this works is that one system
       runs the Sockperf server over a specified port and another system functions as a client
       running the Sockperf client. The binaries are the same, and there is an option to have the
       role of client or server, so the roles can easily be reversed if necessary.

3. OVERVIEW

       Sockperf tests UDP/TCP network connection and maintenance following functionality:

       • Measure latency;

       • Measure TX/RX bandwidth;

       • Measure packet loss;

       • Multicast;

       • Multi-threaded;

       features:

       • Measure the RTT of packets in descrete way;

       • Provide full log of packet times;

       • Provide few modes to monitor multiple file descriptors as recvfrom/select/poll/epoll;

       • Improved CPU utilization;

       Initially the tool was developed to demonstrate advantages of Mellanox's Messaging
       Accelerator (VMA). VMA is a socket API based, dynamically linked, user space Linux library
       which serves to transparently enhance the performance of Multicast/UDP/TCP networking
       heavy applications over the InfiniBand and Ethernet network. More interested user can read
       detail information at http://www.mellanox.com. Actually Sockperf can be used natively, or
       with VMA acceleration and see the benefit of VMA.

       SockPerf operates by sending packets from the client to the server, which then sends the
       packets back to the client. This measured round trip time is the route trip time (RTT)
       between the two machines on a specific network path. The average RTT is calculated by
       dividing the total number of packets that perform this round trip by some fixed period of
       time. The average latency for a given one-way path between the two machines is the average
       RTT divided by two.

       SockPerf can work as server or execute under-load, ping-pong, playback and throughput
       tests and be a server or a client.

       SockPerf can be launched in single point manner that is name as the first mode and using
       special formatted feed file named as the second mode.

       Mode One:

       $sockperf server -i 224.18.7.81 -p 5001
       sockperf: == version #3.5-no.git ==
       sockperf: [SERVER] listen on:
       [ 0] IP = 224.18.7.81     PORT =  5001 # UDP
       sockperf: Warmup stage (sending a few dummy messages)...
       sockperf: [tid 4701] using recvfrom() to block on socket(s

       Mode Two:

       $sockperf server -f conf.file -F e
       sockperf: == version #3.5-no.git ==
       sockperf: [SERVER] listen on:
       [ 0] IP = 5.2.1.3        PORT =  6671 # TCP
       [ 1] IP = 5.2.1.3        PORT =  6672 # TCP
       [ 2] IP = 5.2.1.3        PORT =  6673 # TCP
       [ 3] IP = 5.2.1.3        PORT =  6674 # TCP
       [ 4] IP = 5.2.1.3        PORT =  6675 # TCP
       sockperf: Warmup stage (sending a few dummy messages)...
       sockperf: [tid 4805] using epoll() to block on socket(s)

       Every line in feed file should have following format as

       where

       • [U|T] - UDP or TCP protocol;

       • address - Internet Protocol (IP) address;

       • port - Port number;

   3.1 Available options
       The following table describes Sockperf options, and their possible values:

       -h,-?   --help,--usage         -Show the help message and exit.
               --tcp                  -Use TCP protocol (default UDP).
       -i      --ip                   -Listen on/send to ip <ip>.
       -p      --port                 -Listen on/connect to port <port> (default 11111).
       -f      --file                 -Read list of connections from file (used in pair with -F option).
       -F      --iomux-type           -Type of multiple file descriptors handle [s|select|p|poll|e|epoll|r|recvfrom|x|socketxtreme](default epoll).
               --timeout              -Set select/poll/epoll timeout to <msec>, -1 for infinite (default is 10 msec).
       -a      --activity             -Measure activity by printing a '.' for the last <N> messages processed.
       -A      --Activity             -Measure activity by printing the duration for last <N>  messages processed.
               --tcp-avoid-nodelay    -Stop/Start delivering TCP Messages Immediately (Enable/Disable Nagel). Default is Nagel Disabled except in Throughput where the default is Nagel enabled.
               --tcp-skip-blocking-send
                                      -Enables non-blocking send operation (default OFF).
               --tos                  -Allows setting tos
               --mc-rx-if             -Set address <ip> of interface on which to receive multicast messages (can be other then route table).
               --mc-tx-if             -Set address <ip> of interface on which to transmit multicast messages (can be other then route table).
               --mc-loopback-enable   -Enables mc loopback (default disabled).
               --mc-ttl               -Limit the lifetime of the message (default 2).
               --mc-source-filter     -Set address <ip, hostname> of multicast messages source which is allowed to receive from.
               --uc-reuseaddr         -Enables unicast reuse address (default disabled).
               --lls                  -Turn on LLS via socket option (value = usec to poll).
               --buffer-size          -Set total socket receive/send buffer <size> in bytes (system defined by default).
               --nonblocked           -Open non-blocked sockets.
               --recv_looping_num     -Set Sockperf to loop over recvfrom() until EAGAIN or <N> good received packets, -1 for infinite, must be used with --nonblocked (default 1).
               --dontwarmup           -Don't send warm up messages on start.
               --pre-warmup-wait      -Time to wait before sending warm up messages (seconds).
               --vmazcopyread         -Use VMA's zero copy reads API (See VMA's readme).
               --daemonize            -Run as daemon.
               --no-rdtsc             -Don't use register when taking time; instead use monotonic clock.
               --load-vma             -Load VMA dynamically even when LD_PRELOAD was not used.
               --rate-limit           -use rate limit (packet-pacing), with VMA must be run with VMA_RING_ALLOCATION_LOGIC_TX mode.
               --set-sock-accl        -Set socket acceleration before run (available for some of Mellanox systems)
       -d      --debug                -Print extra debug information.

   3.2 Server
       Server options are:

               --threads-num          -Run <N> threads on server side (requires '-f' option).
               --cpu-affinity         -Set threads affinity to the given core ids in list format (see: cat /proc/cpuinfo).
               --vmarxfiltercb        -Use VMA's receive path message filter callback API (See VMA's readme).
               --force-unicast-reply  -Force server to reply via unicast.
               --dont-reply           -Server won't reply to the client messages.
       -m      --msg-size             -Set maximum message size that the server can receive <size> bytes (default 65507).
       -g      --gap-detection        -Enable gap-detection.

   3.3 Client
       Sockperf supports different scenarios to run itself as a client. There are under-load,
       ping-pong, playback and throughput subcommands to select one of the scenarios.

       • under-load - run sockperf client for latency under load test;

       • ping-pong - run sockperf client for latency test in ping pong mode;

       • playback - run sockperf client for latency test using playback of predefined traffic,
         based on timeline and message size;

       • throughput - run sockperf client for one way throughput test;

       General client options are:

               --srv-num              -Set num of servers the client works with to N.
               --sender-affinity      -Set sender thread affinity to the given core ids in list format (see: cat /proc/cpuinfo).
               --receiver-affinity    -Set receiver thread affinity to the given core ids in list format (see: cat /proc/cpuinfo).
               --full-log             -Dump full log of all messages send/receive time to the given file in CSV format.
               --giga-size            -Print sizes in GigaByte.
               --increase_output_precision
                                      -Increase number of digits after decimal point of the throughput output (from 3 to 9).
               --dummy-send           -Use VMA's dummy send API instead of busy wait, must be higher than regular msg rate.
                                       optional: set dummy-send rate per second (default 10,000), usage: --dummy-send [<rate>|max]
       -t      --time                 -Run for <sec> seconds (default 1, max = 36000000).
               --client_port          -Force the client side to bind to a specific port (default = 0).
               --client_ip            -Force the client side to bind to a specific ip address (default = 0).
       -b      --burst                -Control the client's number of a messages sent in every burst.
               --mps                  -Set number of messages-per-second (default = 10000 - for under-load mode, or max - for ping-pong and throughput modes; for maximum use --mps=max;
                                       support --pps for old compatibility).
       -m      --msg-size             -Use messages of size <size> bytes (minimum default 14).
       -r      --range                -comes with -m <size>, randomly change the messages size in range: <size> +- <N>.
               --data-integrity       -Perform data integrity test

   3.4 Tools
       SockPerf package contains few scripts that allow one to generate special formatted file to
       launch tool in different configurations.

       • filter.awk - can be used for filtering lines from the full log file based on given
         latency range;

       • gen1.awk - this awk script generates playback files (it is for stable PPS playback
         file);

       • gen2.awk - this awk script generates playback files using the input for this script is
         file with lines of the format: startTime; duration; startPPS; endPPS; msgSize (it is for
         linear increased and decreased PPS playback file);

          create playback file using gen1.awk > pfile
          generated file:
       # ==== playback file for sockperf - generated by gen1.awk ====
       #baseTime=1.000000; PPS=200000; runtime=1.000000; interval=0.000005; NUM_RECORDS=200000
       # file contains 200000 records
       1.000005000, 12
       1.000010000, 12
       1.000015000, 12
       1.000020000, 12
       1.000025000, 12
       1.000030000, 12
       1.000035000, 12
       1.000040000, 12
       ...
       1.999950000, 12
       1.999955000, 12
       1.999960000, 12
       1.999965000, 12
       1.999970000, 12
       1.999975000, 12
       1.999980000, 12
       1.999985000, 12
       1.999990000, 12
       1.999995000, 12
       2.000000000, 12
       #200000 records were written successfully
          start server on ipX
          start client using: ./sockperf ping-pong -i <ip-address> -p <port> --playback=pfile

   3.5 Usage
   3.5.1 Running Multicast over IPoIB
       • Configure the routing table to map multicast addresses to the IPoIB interface on both
         client and server machines, as follows:

       route add -net 224.0.0.0 netmask 240.0.0.0 dev ib0

        In this case, ib0 is the IPoIB interface.

       • Run the server as follows:

       $sockperf server -i 224.18.7.81 -p 5001
       sockperf: == version #3.5-no.git ==
       sockperf: [SERVER] listen on:
       [ 0] IP = 224.18.7.81     PORT =  5001 # UDP
       sockperf: Warmup stage (sending a few dummy messages)...
       sockperf: [tid 30399] using recvfrom() to block on socket(s)

       • Run the client as follows:

       $sockperf ping-pong -i 224.18.7.81 -p 5001 -m 16384 -t 10 --mps=max
       sockperf: == version #3.5-no.git ==
       sockperf[CLIENT] send on:sockperf: using recvfrom() to block on socket(s)

       [ 0] IP = 224.18.7.81     PORT =  5001 # UDP
       sockperf: Warmup stage (sending a few dummy messages)...
       sockperf: Starting test...
       sockperf: Test end (interrupted by timer)
       sockperf: Test ended
       sockperf: [Total Run] RunTime=10.000 sec; Warm up time=400 msec; SentMessages=240464; ReceivedMessages=240463
       sockperf: ========= Printing statistics for Server No: 0
       sockperf: [Valid Duration] RunTime=9.550 sec; SentMessages=229630; ReceivedMessages=229630
       sockperf: ====> avg-lat= 20.771 (std-dev=5.266)
       sockperf: # dropped messages = 0; # duplicated messages = 0; # out-of-order messages = 0
       sockperf: Summary: Latency is 20.771 usec
       sockperf: Total 229630 observations; each percentile contains 2296.30 observations
       sockperf: ---> <MAX> observation =  120.108
       sockperf: ---> percentile 99.999 =  106.349
       sockperf: ---> percentile 99.990 =   63.772
       sockperf: ---> percentile 99.900 =   55.940
       sockperf: ---> percentile 99.000 =   48.619
       sockperf: ---> percentile 90.000 =   24.295
       sockperf: ---> percentile 75.000 =   20.358
       sockperf: ---> percentile 50.000 =   19.279
       sockperf: ---> percentile 25.000 =   18.641
       sockperf: ---> <MIN> observation =   16.748

   3.5.2 Running TCP over Ethernet
       • Run the server as follows:

       $sockperf server -i 22.0.0.3 -p 5001 --tcp
       sockperf: == version #3.5-no.git ==
       sockperf: [SERVER] listen on:
       [ 0] IP = 22.0.0.3        PORT =  5001 # TCP
       sockperf: Warmup stage (sending a few dummy messages)...
       sockperf: [tid 1567] using recvfrom() to block on socket(s)

       • Run the client as follows:

       $sockperf ping-pong -i 22.0.0.3 -p 5001 --tcp -m 64 -t 10 --mps=max
       sockperf: == version #3.5-no.git ==
       sockperf[CLIENT] send on:sockperf: using recvfrom() to block on socket(s)

       [ 0] IP = 22.0.0.3        PORT =  5001 # TCP
       sockperf: Warmup stage (sending a few dummy messages)...
       sockperf: Starting test...
       sockperf: Test end (interrupted by timer)
       sockperf: Test ended
       sockperf: [Total Run] RunTime=10.000 sec; Warm up time=400 msec; SentMessages=553625; ReceivedMessages=553624
       sockperf: ========= Printing statistics for Server No: 0
       sockperf: [Valid Duration] RunTime=9.550 sec; SentMessages=528579; ReceivedMessages=528579
       sockperf: ====> avg-lat=  9.017 (std-dev=4.171)
       sockperf: # dropped messages = 0; # duplicated messages = 0; # out-of-order messages = 0
       sockperf: Summary: Latency is 9.017 usec
       sockperf: Total 528579 observations; each percentile contains 5285.79 observations
       sockperf: ---> <MAX> observation =   98.777
       sockperf: ---> percentile 99.999 =   72.628
       sockperf: ---> percentile 99.990 =   17.980
       sockperf: ---> percentile 99.900 =   16.824
       sockperf: ---> percentile 99.000 =   16.193
       sockperf: ---> percentile 90.000 =   14.731
       sockperf: ---> percentile 75.000 =   14.301
       sockperf: ---> percentile 50.000 =    6.222
       sockperf: ---> percentile 25.000 =    5.759
       sockperf: ---> <MIN> observation =    4.629

   3.5.3 Running UDP over Ethernet using VMA
       • More interested user can read detail information about VMA at http://www.mellanox.com.

       • VMA_SPEC=latency is a predefined specification profile for latency.

       • Run the server as follows:

       $VMA_SPEC=latency LD_PRELOAD=libvma.so sockperf server -i 22.0.0.3 -p 5001
        VMA INFO: ---------------------------------------------------------------------------
        VMA INFO: VMA_VERSION: 8.6.10-0 Development Snapshot built on Jun 27 2018 16:06:47
        VMA INFO: Cmd Line: sockperf server -i 22.0.0.3 -p 5001
        VMA INFO: Current Time: Tue Sep 18 08:49:23 2018
        VMA INFO: Pid:  2201
        VMA INFO: OFED Version: MLNX_OFED_LINUX-4.4-1.0.0.0:
        VMA INFO: Architecture: x86_64
        VMA INFO: Node: r-aa-apollo03.mtr.labs.mlnx
        VMA INFO: ---------------------------------------------------------------------------
        VMA INFO: VMA Spec                       Latency                    [VMA_SPEC]
        VMA INFO: Log Level                      INFO                       [VMA_TRACELEVEL]
        VMA INFO: Ring On Device Memory TX       16384                      [VMA_RING_DEV_MEM_TX]
        VMA INFO: Tx QP WRE                      256                        [VMA_TX_WRE]
        VMA INFO: Tx QP WRE Batching             4                          [VMA_TX_WRE_BATCHING]
        VMA INFO: Rx QP WRE                      256                        [VMA_RX_WRE]
        VMA INFO: Rx QP WRE Batching             4                          [VMA_RX_WRE_BATCHING]
        VMA INFO: Rx Poll Loops                  -1                         [VMA_RX_POLL]
        VMA INFO: Rx Prefetch Bytes Before Poll  256                        [VMA_RX_PREFETCH_BYTES_BEFORE_POLL]
        VMA INFO: GRO max streams                0                          [VMA_GRO_STREAMS_MAX]
        VMA INFO: Select Poll (usec)             -1                         [VMA_SELECT_POLL]
        VMA INFO: Select Poll OS Force           Enabled                    [VMA_SELECT_POLL_OS_FORCE]
        VMA INFO: Select Poll OS Ratio           1                          [VMA_SELECT_POLL_OS_RATIO]
        VMA INFO: Select Skip OS                 1                          [VMA_SELECT_SKIP_OS]
        VMA INFO: CQ Drain Interval (msec)       100                        [VMA_PROGRESS_ENGINE_INTERVAL]
        VMA INFO: CQ Interrupts Moderation       Disabled                   [VMA_CQ_MODERATION_ENABLE]
        VMA INFO: CQ AIM Max Count               128                        [VMA_CQ_AIM_MAX_COUNT]
        VMA INFO: CQ Adaptive Moderation         Disabled                   [VMA_CQ_AIM_INTERVAL_MSEC]
        VMA INFO: CQ Keeps QP Full               Disabled                   [VMA_CQ_KEEP_QP_FULL]
        VMA INFO: TCP nodelay                    1                          [VMA_TCP_NODELAY]
        VMA INFO: Avoid sys-calls on tcp fd      Enabled                    [VMA_AVOID_SYS_CALLS_ON_TCP_FD]
        VMA INFO: Internal Thread Affinity       0                          [VMA_INTERNAL_THREAD_AFFINITY]
        VMA INFO: Thread mode                    Single                     [VMA_THREAD_MODE]
        VMA INFO: Mem Allocate type              2 (Huge Pages)             [VMA_MEM_ALLOC_TYPE]
        VMA INFO: ---------------------------------------------------------------------------
       sockperf: == version #3.5-no.git ==
       sockperf: [SERVER] listen on:
       [ 0] IP = 22.0.0.3        PORT =  5001 # UDP
       sockperf: Warmup stage (sending a few dummy messages)...
       sockperf: [tid 2201] using recvfrom() to block on socket(s)

       • Run the client as follows:

       $VMA_SPEC=latency LD_PRELOAD=libvma.so sockperf ping-pong -i 22.0.0.3 -p 5001 -m 64 -t 10 --mps=max
        VMA INFO: ---------------------------------------------------------------------------
        VMA INFO: VMA_VERSION: 8.6.10-0 Development Snapshot built on Jun 27 2018 16:06:47
        VMA INFO: Cmd Line: sockperf ping-pong -i 22.0.0.3 -p 5001 -m 64 -t 10 --mps=max
        VMA INFO: Current Time: Tue Sep 18 08:47:50 2018
        VMA INFO: Pid: 20134
        VMA INFO: OFED Version: MLNX_OFED_LINUX-4.4-1.0.0.0:
        VMA INFO: Architecture: x86_64
        VMA INFO: Node: r-aa-apollo04.mtr.labs.mlnx
        VMA INFO: ---------------------------------------------------------------------------
        VMA INFO: VMA Spec                       Latency                    [VMA_SPEC]
        VMA INFO: Log Level                      INFO                       [VMA_TRACELEVEL]
        VMA INFO: Ring On Device Memory TX       16384                      [VMA_RING_DEV_MEM_TX]
        VMA INFO: Tx QP WRE                      256                        [VMA_TX_WRE]
        VMA INFO: Tx QP WRE Batching             4                          [VMA_TX_WRE_BATCHING]
        VMA INFO: Rx QP WRE                      256                        [VMA_RX_WRE]
        VMA INFO: Rx QP WRE Batching             4                          [VMA_RX_WRE_BATCHING]
        VMA INFO: Rx Poll Loops                  -1                         [VMA_RX_POLL]
        VMA INFO: Rx Prefetch Bytes Before Poll  256                        [VMA_RX_PREFETCH_BYTES_BEFORE_POLL]
        VMA INFO: GRO max streams                0                          [VMA_GRO_STREAMS_MAX]
        VMA INFO: Select Poll (usec)             -1                         [VMA_SELECT_POLL]
        VMA INFO: Select Poll OS Force           Enabled                    [VMA_SELECT_POLL_OS_FORCE]
        VMA INFO: Select Poll OS Ratio           1                          [VMA_SELECT_POLL_OS_RATIO]
        VMA INFO: Select Skip OS                 1                          [VMA_SELECT_SKIP_OS]
        VMA INFO: CQ Drain Interval (msec)       100                        [VMA_PROGRESS_ENGINE_INTERVAL]
        VMA INFO: CQ Interrupts Moderation       Disabled                   [VMA_CQ_MODERATION_ENABLE]
        VMA INFO: CQ AIM Max Count               128                        [VMA_CQ_AIM_MAX_COUNT]
        VMA INFO: CQ Adaptive Moderation         Disabled                   [VMA_CQ_AIM_INTERVAL_MSEC]
        VMA INFO: CQ Keeps QP Full               Disabled                   [VMA_CQ_KEEP_QP_FULL]
        VMA INFO: TCP nodelay                    1                          [VMA_TCP_NODELAY]
        VMA INFO: Avoid sys-calls on tcp fd      Enabled                    [VMA_AVOID_SYS_CALLS_ON_TCP_FD]
        VMA INFO: Internal Thread Affinity       0                          [VMA_INTERNAL_THREAD_AFFINITY]
        VMA INFO: Thread mode                    Single                     [VMA_THREAD_MODE]
        VMA INFO: Mem Allocate type              2 (Huge Pages)             [VMA_MEM_ALLOC_TYPE]
        VMA INFO: ---------------------------------------------------------------------------
       sockperf: == version #3.5-no.git ==
       sockperf[CLIENT] send on:sockperf: using recvfrom() to block on socket(s)

       [ 0] IP = 22.0.0.3        PORT =  5001 # UDP
       sockperf: Warmup stage (sending a few dummy messages)...
       sockperf: Starting test...
       sockperf: Test end (interrupted by timer)
       sockperf: Test ended
       sockperf: [Total Run] RunTime=10.000 sec; Warm up time=400 msec; SentMessages=5166035; ReceivedMessages=5166034
       sockperf: ========= Printing statistics for Server No: 0
       sockperf: [Valid Duration] RunTime=9.550 sec; SentMessages=4951987; ReceivedMessages=4951987
       sockperf: ====> avg-lat=  0.951 (std-dev=0.034)
       sockperf: # dropped messages = 0; # duplicated messages = 0; # out-of-order messages = 0
       sockperf: Summary: Latency is 0.951 usec
       sockperf: Total 4951987 observations; each percentile contains 49519.87 observations
       sockperf: ---> <MAX> observation =    4.476
       sockperf: ---> percentile 99.999 =    1.318
       sockperf: ---> percentile 99.990 =    1.270
       sockperf: ---> percentile 99.900 =    1.179
       sockperf: ---> percentile 99.000 =    1.110
       sockperf: ---> percentile 90.000 =    0.967
       sockperf: ---> percentile 75.000 =    0.952
       sockperf: ---> percentile 50.000 =    0.943
       sockperf: ---> percentile 25.000 =    0.936
       sockperf: ---> <MIN> observation =    0.895

4. LICENSING

       Read 'copying' file in the root place.

5. INSTALLATION

   5.1 Requirements
       What you will need to compile sockperf on Unix systems

       • perl 5.8+ (used by the automake tools)

       • GNU make tools: automake 1.7+, autoconf 2.57+, m4 1.4+ and libtool 1.4+

       • A Compiler, among those tested are:

         • gcc4+ (Ubuntu)

         • gcc4+ (Red Hat)

   5.2 Options to compile
   5.3 How to install
       Download sockperf-<version>.tar.gz.

       Uncompress *.tar.gz file in Unix systems in the same folder with the file by running the
       following command in the shell:

       tar -zxvf sockperf-<version>.tar.gz

        or 2 command:

       gzip -d ./sockperf-<version>.tar.gz
       tar -xf ./sockperf-<version>.tar

       The sockperf package uses the GNU autotools compilation and installation framework.

       These are generic installation instructions.

       The `configure' shell script attempts to guess correct values for various system-dependent
       variables used during compilation. It uses those values to create a `Makefile' in each
       directory of the package. It may also create one or more `.h' files containing system-
       dependent definitions. Finally, it creates a shell script `config.status' that you can run
       in the future to recreate the current configuration, a file `config.cache' that saves the
       results of its tests to speed up reconfiguring, and a file `config.log' containing
       compiler output (useful mainly for debugging `configure').

       If you need to do unusual things to compile the package, please try to figure out how
       `configure' could check whether to do them, and mail diffs or instructions to the address
       given in the `README' so they can be considered for the next release. If at some point
       `config.cache' contains results you don't want to keep, you may remove or edit it.

       The file `configure.in' is used to create `configure' by a program called `autoconf'. You
       only need `configure.in' if you want to change it or regenerate `configure' using a newer
       version of `autoconf'.

       The simplest way to compile this package is:

       1.  `cd' to the directory containing the package's source code and type `./configure' to
           configure the package for your system. If you're using `csh' on an old version of
           System V, you might need to type `sh ./configure' instead to prevent `csh' from trying
           to execute `configure' itself.

       Running `configure' takes awhile. While running, it prints some messages telling which
       features it is checking for.

       $ ./configure --prefix=<path to install>

       There are several options to ./config (or ./Configure) to customize the build:

       To enable test scripts

       $ ./configure --prefix=<path to install> --enable-test

       To enable the documentation

       $ ./configure --prefix=<path to install> --enable-doc

       To enable the special scripts

       $ ./configure --prefix=<path to install> --enable-tool

       To compile with debug symbols and information:

       $ ./configure --prefix=<path to install> --enable-debug

       This will define the _DEBUG variable at compile time.

       Type './configure --help' for a list of all the configure options. Some of the options are
       generic autoconf options, while the SockPerf specific options are prefixed with
       'SOCKPERF:' in the help text.

       2.  Type `make' to compile the package.

       $ make

       3.  Optionally, type `make check' to run any self-tests that come with the package.

       4.  Type `make install' to install the programs and any data files and documentation.

       $ make install

       5.  You can remove the program binaries and object files from the source code directory by
           typing `make clean'. To also remove the files that `configure' created (so you can
           compile the package for a different kind of computer), type `make distclean'. There is
           also a `make maintainer-clean' target, but that is intended mainly for the package's
           developers. If you use it, you may have to get all sorts of other programs in order to
           regenerate files that came with the distribution.