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<para>

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DTrace is an always-available, low overhead, tracing framework

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available on a number of platforms including Solaris, Mac OS X,

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available on a number of platforms including Solaris, macOS,

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Oracle Linux and BSD. DTrace can trace operating system behavior

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and user program execution. It can display argument values and be

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used to infer performance statistics. Probes are monitored by user

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@@ -44,14 +44,6 @@

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</para>

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<para>

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DTrace static probes are included in PHP 5.4. Prior to this they

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were available via a <link xmlns="http://docbook.org/ns/docbook"

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xmlns:xlink="http://www.w3.org/1999/xlink"

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xlink:href="&url.pecl;">PECL</link> extension, which is now

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obsolete.

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</para>

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<para>

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The static DTrace probes in PHP can alternatively be used with the

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SystemTap facility on some Linux distributions.

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</para>

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<para>

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When monitoring is complete, the D script can be terminated with a

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<literal>^C</literal>.

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<keycombo action='simul'><keycap>CTRL</keycap><keycap>C</keycap></keycombo>.

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</para>

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<para>

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@@ -392,7 +384,7 @@ php*:::function-entry

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</sect2>

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<sect2 xml:id="features.dtrace.references">

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<title>See Also</title>

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&reftitle.seealso;

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<simplelist>

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<member><link linkend="oci8.dtrace">OCI8 and DTrace Dynamic Tracing</link></member>

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</simplelist>

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