Add a new sched_clear_name() method to the scheduler interface to clear
the cached name used for KTR_SCHED traces when a thread's name changes. This way KTR_SCHED traces (and thus schedgraph) will notice when a thread's name changes, most commonly via execve(). MFC after: 2 weeks
This commit is contained in:
parent
fb175d1c81
commit
44ad547522
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=232700
@ -57,6 +57,7 @@ __FBSDID("$FreeBSD$");
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#include <sys/pioctl.h>
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#include <sys/namei.h>
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#include <sys/resourcevar.h>
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#include <sys/sched.h>
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#include <sys/sdt.h>
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#include <sys/sf_buf.h>
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#include <sys/syscallsubr.h>
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@ -636,6 +637,9 @@ do_execve(td, args, mac_p)
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else if (vn_commname(binvp, p->p_comm, sizeof(p->p_comm)) != 0)
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bcopy(fexecv_proc_title, p->p_comm, sizeof(fexecv_proc_title));
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bcopy(p->p_comm, td->td_name, sizeof(td->td_name));
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#ifdef KTR
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sched_clear_tdname(td);
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#endif
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/*
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* mark as execed, wakeup the process that vforked (if any) and tell
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@ -180,6 +180,9 @@ ithread_update(struct intr_thread *ithd)
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/* Update name and priority. */
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strlcpy(td->td_name, ie->ie_fullname, sizeof(td->td_name));
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#ifdef KTR
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sched_clear_tdname(td);
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#endif
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thread_lock(td);
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sched_prio(td, pri);
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thread_unlock(td);
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@ -115,6 +115,9 @@ kproc_create(void (*func)(void *), void *arg,
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va_start(ap, fmt);
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vsnprintf(td->td_name, sizeof(td->td_name), fmt, ap);
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va_end(ap);
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#ifdef KTR
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sched_clear_tdname(td);
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#endif
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/* call the processes' main()... */
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cpu_set_fork_handler(td, func, arg);
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@ -453,6 +456,9 @@ kproc_kthread_add(void (*func)(void *), void *arg,
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va_start(ap, fmt);
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vsnprintf(td->td_name, sizeof(td->td_name), fmt, ap);
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va_end(ap);
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#ifdef KTR
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sched_clear_tdname(td);
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#endif
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return (0);
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}
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va_start(ap, fmt);
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@ -548,6 +548,9 @@ sys_thr_set_name(struct thread *td, struct thr_set_name_args *uap)
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if (ttd == NULL)
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return (ESRCH);
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strcpy(ttd->td_name, name);
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#ifdef KTR
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sched_clear_tdname(ttd);
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#endif
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PROC_UNLOCK(p);
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return (error);
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}
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@ -1614,6 +1614,17 @@ sched_tdname(struct thread *td)
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#endif
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}
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#ifdef KTR
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void
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sched_clear_tdname(struct thread *td)
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{
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struct td_sched *ts;
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ts = td->td_sched;
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ts->ts_name[0] = '\0';
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}
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#endif
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void
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sched_affinity(struct thread *td)
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{
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@ -2684,6 +2684,17 @@ sched_tdname(struct thread *td)
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#endif
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}
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#ifdef KTR
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void
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sched_clear_tdname(struct thread *td)
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{
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struct td_sched *ts;
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ts = td->td_sched;
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ts->ts_name[0] = '\0';
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}
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#endif
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#ifdef SMP
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/*
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@ -138,6 +138,9 @@ int sched_sizeof_thread(void);
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* functions.
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*/
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char *sched_tdname(struct thread *td);
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#ifdef KTR
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void sched_clear_tdname(struct thread *td);
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#endif
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static __inline void
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sched_pin(void)
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