xdebug only profile php process not php-fpm process

Question

php info.php can triger profiling and write profile file to /tmp/cachegrind.out.* like

-rw-r--r-- 1 roofe www 344 Jul 11 12:04 /tmp/cachegrind.out.6723
-rw-r--r-- 1 root root 7172 Jul 11 12:06 /tmp/cachegrind.out.6808
-rw-r--r-- 1 root root 7178 Jul 11 12:06 /tmp/cachegrind.out.6819

http://example.com/info.php cannot triger profiling

here is the php info

which php
/usr/bin/php
ll /usr/bin/php
lrwxrwxrwx 1 root root 27 May 21 15:14 /usr/bin/php -> /etc/opt/remi/php73/bin/php

I also found all the php process can trig prifiling, while php-fpm not. ps -aef | grep php

root 927 919 1 10:51 ? 00:00:50 /etc/opt/remi/php73/bin/php artisan horizon:supervisor ......
root 948 928 0 10:51 ? 00:00:17 /etc/opt/remi/php73/bin/php artisan horizon:work ........
root 28161 1 0 09:45 ? 00:00:00 php-fpm: master process (/etc/opt/remi/php73/etc/php-fpm.conf)
www 28162 28161 1 09:45 ? 00:01:32 php-fpm: pool www

php.ini

;[xdebug]
zend_extension=/etc/opt/remi/php73/lib/php/extensions/no-debug-non-zts-20180731/xdebug.so
xdebug.remote_autostart = On
xdebug.remote_enable = On
xdebug.remote_host=localhost
xdebug.remote_handler=dbgp
xdebug.collect_vars = On
xdebug.collect_return = On
xdebug.collect_params = On
xdebug.profiler_enable= On
xdebug.idekey = PHPSTORM

and nginx conf

location / {
 index /../home/index.html;
 add_header X-Location /;
 try_files $uri /index.php$is_args$args;
 fastcgi_pass unix:/dev/shm/php73-fpm.sock;
 fastcgi_index index.php;
 fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
 include fastcgi_params;
}

• LazyOne: General thoughts: 1) Check the actual settings from phpinfo() via browser - maybe it uses different config file etc. (you are not using Apache where it's a common situation, but still) 2) Check for file permission issue (in a folder where those files meant to be created). No other ideas.
• Remi Collet: Check PrivateTmp in php-fpm unit file (which result in /tmp/being redirect in some sub directory)
• Remi Collet: Path to zend_extension seems very strange.....
• LF-DevJourney: @RemiCollet It's OK, when I install xdebug, it show me to add this path to config.
• Remi Collet: As you are using php73-php-fpm from my repo, you should also use php73-php-pecl-xdebug from there.... (/opt/remi/php73/root/usr/lib64/php/modules/xdebug.so and /etc/opt/remi/php73/php.d/15-xdebug.ini)

Answer 1

I think you are affected by PrivateTmp=true in the service unit file:

/usr/lib/systemd/system/php72-php-fpm.service

By default XDebug store profiler file in xdebug.profiler_output_dir=/tmp

You can either disable PrivateTmp or use a directory outside /tmp or /var/tmp