note 126009 added to function.proc-nice
| From: | phil_php at zieaon dot com | Date: | Thu, 15 Apr 2021 01:43:54 +0000 |
| Subject: | note 126009 added to function.proc-nice | ||
| Groups: | php.notes | ||
| Request: | Send a blank email to php-notes+get-216283@lists.php.net to get a copy of this message | ||
It is important to note that this is a relative change. I didn't read the description properly
and couldn't figure out why setting proc_nice(0) didn't take the forked children back to
0!
For example if you run:
<?php
proc_nice(-5);
proc_nice(0); // will have no effect
proc_nice(5); // will take the niceness back to 0
?>
In PHP CLI under Debian (and probably many other Linux flavours) you can read the
'niceness' from the proc filesystem. (There may be a PHP command that gives this info but
there doesn't seem to be a link to it on this page.)
E.g
<?php
$Current_Niceness_Value = intval(explode("
",file_get_contents("/proc/".getmypid()."/stat"))[18]);
// Note: Older versions of Linux return an unsigned integer which has to be converted to a signed
integer.
$Current_Niceness_Value = unpack("l",pack("L",intval(explode("
",file_get_contents("/proc/".getmypid()."/stat"))[18])))[1];
?>
----
Server IP: 45.112.84.4
Probable Submitter: 45.112.85.242 (proxied: 220.240.153.76)
----
Manual Page -- https://php.net/manual/en/function.proc-nice.php
Edit -- https://main.php.net/note/edit/126009
Del: integrated -- https://main.php.net/note/delete/126009/integrated
Del: useless -- https://main.php.net/note/delete/126009/useless
Del: bad code -- https://main.php.net/note/delete/126009/bad+code
Del: spam -- https://main.php.net/note/delete/126009/spam
Del: non-english -- https://main.php.net/note/delete/126009/non-english
Del: in docs -- https://main.php.net/note/delete/126009/in+docs
Del: other reasons-- https://main.php.net/note/delete/126009
Reject -- https://main.php.net/note/reject/126009
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