what does it mean about "syscall_entry" and "syscall_exit"?
"yuanbor" <[email protected]>
| Newsgroups | gmane.linux.kernel.tracing |
|---|---|
| Message-ID | <[email protected]> |
hello everybody,I got the following programme's trace
-----------
#include <unistd.h>
int main(int argc,char **argv)
{
getegid();
return 0;
}
-----------
what disturb me most is that what is the exact time of "getegid()" system call.Here is some trace:
-----------
kernel_arch.syscall_entry: 427.104490968 (/home/yuanbor/trace/syscall/1184273693/cpu_0), 2785, 2785, ./syscall, UNBRANDED, 2738, 0x0, SYSCALL { getegid32, -7152 }
locking.hardirqs_off: 427.104491442 (/home/yuanbor/trace/syscall/1184273693/cpu_0), 2785, 2785, ./syscall, UNBRANDED, 2738, 0x0, SYSCALL { 3222293953 }
locking.hardirqs_on: 427.104491720 (/home/yuanbor/trace/syscall/1184273693/cpu_0), 2785, 2785, ./syscall, UNBRANDED, 2738, 0x0, SYSCALL { 3222294237 }
kernel_arch.syscall_exit: 427.104492027 (/home/yuanbor/trace/syscall/1184273693/cpu_0), 2785, 2785, ./syscall, UNBRANDED, 2738, 0x0, USER_MODE
locking.hardirqs_on: 427.104492262 (/home/yuanbor/trace/syscall/1184273693/cpu_0), 2785, 2785, ./syscall, UNBRANDED, 2738, 0x0, USER_MODE { 3222294012 }
-----------
Can I get the exact time of "getegid()" system call by (427.104492027 - 427.104490968)?
If I can't, what's the way to get it?
Thank you for any info.
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