Lock fpm scoreboard while reading status #3185
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The scoreboard structs are locked so concise readings can be acquired. Fixes https://bugs.php.net/bug.php?id=76109
bukka
reviewed
Mar 18, 2018
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| struct fpm_scoreboard_proc_s procs[scoreboard_p->nprocs]; |
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I'm not sure if this is gonna work on all supported compilers. We also target C89 so definitions has to be at the beginning of block.
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Considering that VLA is C99, you can't really use it though.
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@tback I think that memory allocation is a small overhead and this (status) is definitely not a perf critical path so I wouldn't worry about that. As I mentioned, you can't use VLA so there is not much options anyway... :) The It will go to 7.1 so if you could target it, that would be great! Thanks for your work! |
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Thanks @bukka. I will close this PR and open another one when I have something. |
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The scoreboard structs are locked so concise readings can be acquired.
@bukka: I decided against implementing
fpm_scoreboard_copyfor now. The way I did it avoids explicit memory management because the scoreboard copies are put on the stack.I don't know exactly what php version introduced the fpm status page, but I know the code was present in 5.5 already.
Fixes https://bugs.php.net/bug.php?id=76109