How to find out which php processes generate high CPU load?

Question

Server optimization

Php consumes a lot of CPU resources, up to 50% of the power of an 8-core Intel Xeon.
Graph of cpu load generated by different consumers:
https://www.dropbox.com/s/1ozyyat7ee9uibo/Screensh...
PHP load and number of running instances:
https://www.dropbox.com/s/1cdxku8bpjks8ir/Screensh. ..
Tell me how to find out exactly where the inefficiency is, which processes generate the most load?

Answer 1

IMHO, the surest method is profiling. You can use xhprof , you can use XDebug .