just what does kserel mean?
I have searched all over the net for a good definition of what the top state, kserel means. When I run mysql this is the state in which it runs. PID USERNAME THR PRI NICE SIZERES STATE C TIME WCPU COMMAND 2117 mysql 17 200 323M 59080K kserel 0 0:02 0.00% mysqld I'm a newbie with freebsd and am concerned that this might be some sort of problem since my installation of Mysql turned out to be rather challenging. Thanks, Nestor ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: just what does kserel mean?
In the last episode (Sep 11), Nestor Wheelock said: I have searched all over the net for a good definition of what the top state, kserel means. When I run mysql this is the state in which it runs. PID USERNAME THR PRI NICE SIZERES STATE C TIME WCPU COMMAND 2117 mysql 17 200 323M 59080K kserel 0 0:02 0.00% mysqld That's just a wait state used inside libkse threads meaning a thread is waiting for something to do. Note that for a threaded program, the STATE seen by top is that of only one thread owned by the process. Press 'H' to see each thread on its own line. -- Dan Nelson [EMAIL PROTECTED] ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: just what does kserel mean?
On Sep 11, 2006, at 3:14 PM, Nestor Wheelock wrote: I have searched all over the net for a good definition of what the top state, kserel means. When I run mysql this is the state in which it runs. PID USERNAME THR PRI NICE SIZERES STATE C TIME WCPU COMMAND 2117 mysql 17 200 323M 59080K kserel 0 0:02 0.00% mysqld I'm a newbie with freebsd and am concerned that this might be some sort of problem since my installation of Mysql turned out to be rather challenging. This state is set in the kse_release() call in sys/kern/kern_kse.c, and appears to mean that the process is waiting to be woken up by a signal or is otherwise blocked waiting for more work; this is handled by returning control to userspace via an upcall. See man kse_release: In other words, as soon as there is a scheduling decision to be made, the KSE becomes unassigned, because the kernel does not presume to know how the process' other runnable threads should be scheduled. Unassigned KSEs always return to user space as soon as possible via the upcall mechanism (described below), allowing the user process to decide how that KSE should be utilized next. KSEs always complete as much work as possible in the kernel before becoming unassigned. [ ... ] The kse_release() system call is used to ``park'' the KSE assigned to the currently running thread when it is not needed, e.g., when there are more available KSEs than runnable user threads. The thread converts to an upcall but does not get scheduled until there is a new reason to do so, e.g., a previously blocked thread becomes runnable, or the timeout expires. If successful, kse_release() does not return to the caller. -- -Chuck ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: just what does kserel mean?
On 09/11/06 17:14, Nestor Wheelock wrote: I have searched all over the net for a good definition of what the top state, kserel means. When I run mysql this is the state in which it I don't mean to be stating the obvious... but as a newbie you might not know that KSE == Kernel Schedulable Entity You can do all sorts of googling on freebsd KSE and as Chuck mentioned browse sys/kern/kern_kse.c HTH. runs. PID USERNAME THR PRI NICE SIZERES STATE C TIME WCPU COMMAND 2117 mysql 17 200 323M 59080K kserel 0 0:02 0.00% mysqld I'm a newbie with freebsd and am concerned that this might be some sort of problem since my installation of Mysql turned out to be rather challenging. Thanks, Nestor ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED] -- Regards, Eric ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
