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Clarification of jit_bisect_limit usage

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As a new bird to PHP interpreter, I tried to set jit_bisect_limit
with jit=tracing in order to debug/probe PHP JIT feature, but
failed to hit my breakpoint and hence got confused.

I found that jit_bisect_limit only works under special JIT trigger
mode like 0: on script load, or 1: on first execution, after heavily
reading source code and trial-and-error experiments.

So, I would like to clarify the usage in PHP manual.
Hopefully, this can save time cost and reduce confusion of new PHP
interpreter developers.

The patch is verified on my local machine with phd build and the
web content and link looks good.

Signed-off-by: Su, Tao <tao.su@intel.com>

Co-authored-by: Christoph M. Becker <cmbecker69@gmx.de>

Closes GH-1337.
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Tony Su 2022-01-18 05:15:29 +08:00 committed by GitHub
parent dc54babb68
commit c46a5fe7bc
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4
reference/opcache/ini.xml
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@ -1052,7 +1052,9 @@
<listitem>
<para>
Debugging option that disables JIT compilation after compiling a certain number of functions.
This may be helpful to bisect the source of a JIT miscompilation.
This may be helpful to bisect the source of a JIT miscompilation. Note: this option only works
when JIT trigger is set to 0 (compile on script load) or 1 (compile on first execution),
e.g., <code>opcache.jit=1215</code>. See more in <link linkend="ini.opcache.jit">opcache.jit</link> option.
</para>
</listitem>
</varlistentry>