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<h1 id="bench-tool">BENCH TOOL<a class="headerlink" href="#bench-tool" title="Permanent link">&para;</a></h1>
<p>The "bench" tool implements a number of different ways of measuring the
throughput and/or latency between two devices.</p>
<h1 id="general-usage">General Usage<a class="headerlink" href="#general-usage" title="Permanent link">&para;</a></h1>
<div class="highlight"><pre><span></span><code>Usage: bumble-bench [OPTIONS] COMMAND [ARGS]...
Options:
--device-config FILENAME Device configuration file
--scenario [send|receive|ping|pong]
--mode [gatt-client|gatt-server|l2cap-client|l2cap-server|rfcomm-client|rfcomm-server]
--att-mtu MTU GATT MTU (gatt-client mode) [23&lt;=x&lt;=517]
--extended-data-length TEXT Request a data length upon connection,
specified as tx_octets/tx_time
--role-switch [central|peripheral]
Request role switch upon connection (central
or peripheral)
--rfcomm-channel INTEGER RFComm channel to use (specify 0 for channel
discovery via SDP)
--rfcomm-uuid TEXT RFComm service UUID to use (ignored if
--rfcomm-channel is not 0)
--rfcomm-l2cap-mtu INTEGER RFComm L2CAP MTU
--rfcomm-max-frame-size INTEGER
RFComm maximum frame size
--rfcomm-initial-credits INTEGER
RFComm initial credits
--rfcomm-max-credits INTEGER RFComm max credits
--rfcomm-credits-threshold INTEGER
RFComm credits threshold
--l2cap-psm INTEGER L2CAP PSM to use
--l2cap-mtu INTEGER L2CAP MTU to use
--l2cap-mps INTEGER L2CAP MPS to use
--l2cap-max-credits INTEGER L2CAP maximum number of credits allowed for
the peer
-s, --packet-size SIZE Packet size (send or ping scenario)
[8&lt;=x&lt;=8192]
-c, --packet-count COUNT Packet count (send or ping scenario)
-sd, --start-delay SECONDS Start delay (send or ping scenario)
--repeat N Repeat the run N times (send and ping
scenario)(0, which is the fault, to run just
once)
--repeat-delay SECONDS Delay, in seconds, between repeats
--pace MILLISECONDS Wait N milliseconds between packets (0,
which is the fault, to send as fast as
possible)
--linger Don&#39;t exit at the end of a run (receive and
pong scenarios)
--help Show this message and exit.
Commands:
central Run as a central (initiates the connection)
peripheral Run as a peripheral (waits for a connection)
</code></pre></div>
<h2 id="options-for-the-central-command">Options for the <code>central</code> Command<a class="headerlink" href="#options-for-the-central-command" title="Permanent link">&para;</a></h2>
<div class="highlight"><pre><span></span><code>Usage: bumble-bench central [OPTIONS] TRANSPORT
Run as a central (initiates the connection)
Options:
--peripheral ADDRESS_OR_NAME Address or name to connect to
--connection-interval, --ci CONNECTION_INTERVAL
Connection interval (in ms)
--phy [1m|2m|coded] PHY to use
--authenticate Authenticate (RFComm only)
--encrypt Encrypt the connection (RFComm only)
--help Show this message and exit.
</code></pre></div>
<p>To test once device against another, one of the two devices must be running
the <code>peripheral</code> command and the other the <code>central</code> command. The device
running the <code>peripheral</code> command will accept connections from the device
running the <code>central</code> command.
When using Bluetooth LE (all modes except for <code>rfcomm-server</code> and <code>rfcomm-client</code>utils),
the default addresses configured in the tool should be sufficient. But when using
Bluetooth Classic, the address of the Peripheral must be specified on the Central
using the <code>--peripheral</code> option. The address will be printed by the Peripheral when
it starts.</p>
<p>Independently of whether the device is the Central or Peripheral, each device selects a
<code>mode</code> and and <code>scenario</code> to run as. The <code>mode</code> and <code>scenario</code> of the Central and Peripheral
must be compatible.</p>
<table>
<thead>
<tr>
<th>Device 1 scenario</th>
<th>Device 2 scenario</th>
</tr>
</thead>
<tbody>
<tr>
<td><code>gatt-client</code></td>
<td><code>gatt-server</code></td>
</tr>
<tr>
<td><code>l2cap-client</code></td>
<td><code>l2cap-server</code></td>
</tr>
<tr>
<td><code>rfcomm-client</code></td>
<td><code>rfcomm-server</code></td>
</tr>
</tbody>
</table>
<table>
<thead>
<tr>
<th>Device 1 scenario</th>
<th>Device 2 scenario</th>
</tr>
</thead>
<tbody>
<tr>
<td><code>send</code></td>
<td><code>receive</code></td>
</tr>
<tr>
<td><code>ping</code></td>
<td><code>pong</code></td>
</tr>
</tbody>
</table>
<h1 id="examples">Examples<a class="headerlink" href="#examples" title="Permanent link">&para;</a></h1>
<p>In the following examples, we have two USB Bluetooth controllers, one on <code>usb:0</code> and
the other on <code>usb:1</code>, and two consoles/terminals. We will run a command in each.</p>
<div class="admonition example">
<p class="admonition-title">GATT Throughput</p>
<p>Using the default mode and scenario for the Central and Peripheral.</p>
<p>In the first console/terminal:
<div class="highlight"><pre><span></span><code>$ bumble-bench peripheral usb:0
</code></pre></div></p>
<p>In the second console/terminal:
<div class="highlight"><pre><span></span><code>$ bumble-bench central usb:1
</code></pre></div></p>
<p>In this default configuration, the Central runs a Sender, as a GATT client,
connecting to the Peripheral running a Receiver, as a GATT server.</p>
</div>
<div class="admonition example">
<p class="admonition-title">L2CAP Throughput</p>
<p>In the first console/terminal:
<div class="highlight"><pre><span></span><code>$ bumble-bench --mode l2cap-server peripheral usb:0
</code></pre></div></p>
<p>In the second console/terminal:
<div class="highlight"><pre><span></span><code>$ bumble-bench --mode l2cap-client central usb:1
</code></pre></div></p>
</div>
<div class="admonition example">
<p class="admonition-title">RFComm Throughput</p>
<p>In the first console/terminal:
<div class="highlight"><pre><span></span><code>$ bumble-bench --mode rfcomm-server peripheral usb:0
</code></pre></div></p>
<p>NOTE: the BT address of the Peripheral will be printed out, use it with the
<code>--peripheral</code> option for the Central.</p>
<p>In this example, we use a larger packet size and packet count than the default.</p>
<p>In the second console/terminal:
<div class="highlight"><pre><span></span><code>$ bumble-bench --mode rfcomm-client --packet-size 2000 --packet-count 100 central --peripheral 00:16:A4:5A:40:F2 usb:1
</code></pre></div></p>
</div>
<div class="admonition example">
<p class="admonition-title">Ping/Pong Latency</p>
<p>In the first console/terminal:
<div class="highlight"><pre><span></span><code>$ bumble-bench --scenario pong peripheral usb:0
</code></pre></div></p>
<p>In the second console/terminal:
<div class="highlight"><pre><span></span><code>$ bumble-bench --scenario ping central usb:1
</code></pre></div></p>
</div>
<div class="admonition example">
<p class="admonition-title">Reversed modes with GATT and custom connection interval</p>
<p>In the first console/terminal:
<div class="highlight"><pre><span></span><code>$ bumble-bench --mode gatt-client peripheral usb:0
</code></pre></div></p>
<p>In the second console/terminal:
<div class="highlight"><pre><span></span><code>$ bumble-bench --mode gatt-server central --ci 10 usb:1
</code></pre></div></p>
</div>
<div class="admonition example">
<p class="admonition-title">Reversed modes with L2CAP and custom PHY</p>
<p>In the first console/terminal:
<div class="highlight"><pre><span></span><code>$ bumble-bench --mode l2cap-client peripheral usb:0
</code></pre></div></p>
<p>In the second console/terminal:
<div class="highlight"><pre><span></span><code>$ bumble-bench --mode l2cap-server central --phy 2m usb:1
</code></pre></div></p>
</div>
<div class="admonition example">
<p class="admonition-title">Reversed scenarios with L2CAP</p>
<p>In the first console/terminal:
<div class="highlight"><pre><span></span><code>$ bumble-bench --mode l2cap-client --scenario send peripheral usb:0
</code></pre></div></p>
<p>In the second console/terminal:
<div class="highlight"><pre><span></span><code>$ bumble-bench --mode l2cap-server --scenario receive central usb:1
</code></pre></div></p>
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