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process: transfer TIDs in bulk and reuse them locally

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This commit is contained in:
Balazs Gerofi
2016-08-02 16:59:04 +09:00
parent dac6f2883e
commit 6aae35cb3d
5 changed files with 122 additions and 9 deletions
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22
kernel/process.c
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@ -53,7 +53,6 @@ static int copy_user_ranges(struct process_vm *vm, struct process_vm *orgvm);
extern void release_fp_regs(struct thread *proc);
extern void save_fp_regs(struct thread *proc);
extern void restore_fp_regs(struct thread *proc);
void settid(struct thread *proc, int mode, int newcpuid, int oldcpuid);
extern void __runq_add_proc(struct thread *proc, int cpu_id);
extern void terminate_host(int pid);
extern void lapic_timer_enable(unsigned int clocks);
@ -2062,6 +2061,7 @@ release_process(struct process *proc)
mcs_rwlock_writer_unlock(&parent->children_lock, &lock);
}
if (proc->tids) kfree(proc->tids);
kfree(proc);
}
@ -2167,6 +2167,23 @@ release_sigcommon(struct sig_common *sigcommon)
kfree(sigcommon);
}
/*
* Release the TID from the process' TID set corresponding to this thread.
* NOTE: threads_lock must be held.
*/
void __release_tid(struct process *proc, struct thread *thread) {
int i;
for (i = 0; i < proc->nr_tids; ++i) {
if (proc->tids[i].thread != thread) continue;
proc->tids[i].thread = NULL;
dkprintf("%s: tid %d has been released by %p\n",
__FUNCTION__, thread->tid, thread);
break;
}
}
void destroy_thread(struct thread *thread)
{
struct sig_pending *pending;
@ -2183,6 +2200,7 @@ void destroy_thread(struct thread *thread)
mcs_rwlock_writer_lock(&proc->threads_lock, &lock);
list_del(&thread->siblings_list);
__release_tid(proc, thread);
mcs_rwlock_writer_unlock(&proc->threads_lock, &lock);
cpu_clear(thread->cpu_id, &thread->vm->address_space->cpu_set,
@ -2522,7 +2540,7 @@ static void do_migrate(void)
v->flags |= CPU_FLAG_NEED_RESCHED;
ihk_mc_interrupt_cpu(get_x86_cpu_local_variable(cpu_id)->apic_id, 0xd1);
double_rq_unlock(cur_v, v, irqstate);
settid(req->thread, 2, cpu_id, old_cpu_id);
//settid(req->thread, 2, cpu_id, old_cpu_id, 0, NULL);
ack:
waitq_wakeup(&req->wq);