怎样知道某个php-cgi进程具体在执行哪个文件？

klemperer

debian系统最近负载比较高，用top命令看，有一个php-cgi进程（用spawn-fcgi管理的）运行时间很长（600:00:00），占用CPU70%以上，请问怎样才能知道这个进程具体在执行哪个php文件？

谢谢

todayhero

strace -p PID

todayhero

ll /proc/PID/fd

strace -p PID

lsof -p PID

klemperer

用strace -p得到以下结果，请问这些内容是什么意思？难道php-cgi被注入了？
stat64("/sys/class/mem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/null/subsystem/random/subsystem/full/subsystem/full/subsystem/full/subsystem/null/subsystem/urandom/subsystem/zero/subsystem/random/subsystem/full/dev", {st_mode=S_IFREG|0444, st_size=4096, ...}) = 0
stat64("/sys/class/mem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/null/subsystem/random/subsystem/full/subsystem/full/subsystem/full/subsystem/null/subsystem/urandom/subsystem/zero/subsystem/random/subsystem/full/subsystem", 0xbfaad034) = -1 ELOOP (Too many levels of symbolic links)
stat64("/sys/class/mem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/null/subsystem/random/subsystem/full/subsystem/full/subsystem/full/subsystem/null/subsystem/urandom/subsystem/zero/subsystem/random/subsystem/full/uevent", {st_mode=S_IFREG|0200, st_size=4096, ...}) = 0
stat64("/sys/class/mem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/null/subsystem/random/subsystem/full/subsystem/full/subsystem/full/subsystem/null/subsystem/urandom/subsystem/zero/subsystem/random/subsystem/null", {st_mode=S_IFDIR|0755, st_size=0, ...}) = 0
open("/sys/class/mem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/full/subsystem/null/subsystem/random/subsystem/full/subsystem/full/subsystem/full/subsystem/null/subsystem/urandom/subsystem/zero/subsystem/random/subsystem/null", O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_DIRECTORY|0x80000) = 4
getdents64(4, /* 5 entries */, 3276   = 136
socket_subcall(0x4, 0xa72dc7b, 0xbfaadb80, 0, 0xb79fbff4, 0xbfaada08, 0xffffffda, 0x7b) = 0
getdents64(4, /* 0 entries */, 3276   = 0
close(4)                                = 0
……