X-Git-Url: https://git.whamcloud.com/?p=fs%2Flustre-release.git;a=blobdiff_plain;f=lnet%2Fselftest%2Ftimer.c;h=3ceec81bf1b087bc3bc5c41eab6ae860e9b7ee49;hp=97d92970542aebec26f8ac4eb2e8a7c85db68a03;hb=917655fc2938b90a9c246dd2d58408c42aa1658d;hpb=776615e6825e2c90c2635c8b55e7bb02da33726c

diff --git a/lnet/selftest/timer.c b/lnet/selftest/timer.c
index 97d9297..3ceec81 100644
--- a/lnet/selftest/timer.c
+++ b/lnet/selftest/timer.c
@@ -1,70 +1,92 @@
-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
+/*
+ * GPL HEADER START
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 only,
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License version 2 for more details (a copy is included
+ * in the LICENSE file that accompanied this code).
  *
- * Copyright (C) 2001, 2002 Cluster File Systems, Inc.
- *   Author: Isaac Huang <isaac@clusterfs.com>
+ * You should have received a copy of the GNU General Public License
+ * version 2 along with this program; If not, see
+ * http://www.gnu.org/licenses/gpl-2.0.html
  *
+ * GPL HEADER END
+ */
+/*
+ * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Use is subject to license terms.
+ *
+ * Copyright (c) 2011, 2013, Intel Corporation.
+ */
+/*
+ * This file is part of Lustre, http://www.lustre.org/
+ * Lustre is a trademark of Sun Microsystems, Inc.
+ *
+ * lnet/selftest/timer.c
+ *
+ * Author: Isaac Huang <isaac@clusterfs.com>
  */
 
 #define DEBUG_SUBSYSTEM S_LNET
 
-#include <libcfs/kp30.h>
-#include <libcfs/libcfs.h>
-#include <lnet/lib-lnet.h>
-
 #include "selftest.h"
 
 
 /*
- * Timers are implemented as a sorted queue of expiry times. The queue 
- * is slotted, with each slot holding timers which expire in a 
- * 2**STTIMER_MINPOLL (8) second period. The timers in each slot are 
+ * Timers are implemented as a sorted queue of expiry times. The queue
+ * is slotted, with each slot holding timers which expire in a
+ * 2**STTIMER_MINPOLL (8) second period. The timers in each slot are
  * sorted by increasing expiry time. The number of slots is 2**7 (128),
  * to cover a time period of 1024 seconds into the future before wrapping.
  */
-#define	STTIMER_MINPOLL        3   /* log2 min poll interval (8 s) */
-#define	STTIMER_SLOTTIME       (1 << STTIMER_MINPOLL)
-#define	STTIMER_SLOTTIMEMASK   (~(STTIMER_SLOTTIME - 1))
-#define	STTIMER_NSLOTS	       (1 << 7)
-#define	STTIMER_SLOT(t)	       (&stt_data.stt_hash[(((t) >> STTIMER_MINPOLL) & \
+#define STTIMER_MINPOLL        3   /* log2 min poll interval (8 s) */
+#define STTIMER_SLOTTIME       (1 << STTIMER_MINPOLL)
+#define STTIMER_SLOTTIMEMASK   (~(STTIMER_SLOTTIME - 1))
+#define STTIMER_NSLOTS	       (1 << 7)
+#define STTIMER_SLOT(t)	       (&stt_data.stt_hash[(((t) >> STTIMER_MINPOLL) & \
                                                     (STTIMER_NSLOTS - 1))])
 
-struct st_timer_data {
-        spinlock_t       stt_lock;
-        /* start time of the slot processed previously */
-        cfs_time_t       stt_prev_slot; 
-        struct list_head stt_hash[STTIMER_NSLOTS];
-        int              stt_shuttingdown;
-#ifdef __KERNEL__
-        int              stt_nthreads;
-#endif
+static struct st_timer_data {
+	spinlock_t		stt_lock;
+	/* start time of the slot processed previously */
+	time64_t		stt_prev_slot;
+	struct list_head	stt_hash[STTIMER_NSLOTS];
+	int			stt_shuttingdown;
+	wait_queue_head_t	stt_waitq;
+	int			stt_nthreads;
 } stt_data;
 
 void
-stt_add_timer (stt_timer_t *timer)
+stt_add_timer(struct stt_timer *timer)
 {
-        struct list_head *pos;
+	struct list_head *pos;
 
-        spin_lock(&stt_data.stt_lock);
+	spin_lock(&stt_data.stt_lock);
 
-#ifdef __KERNEL__
-        LASSERT (stt_data.stt_nthreads > 0);
-#endif
-        LASSERT (!stt_data.stt_shuttingdown);
-        LASSERT (timer->stt_func != NULL);
-        LASSERT (list_empty(&timer->stt_list));
-        LASSERT (cfs_time_after(timer->stt_expires, cfs_time_current_sec()));
+	LASSERT(stt_data.stt_nthreads > 0);
+	LASSERT(!stt_data.stt_shuttingdown);
+	LASSERT(timer->stt_func != NULL);
+	LASSERT(list_empty(&timer->stt_list));
+	LASSERT(timer->stt_expires > ktime_get_real_seconds());
 
-        /* a simple insertion sort */
-        list_for_each_prev (pos, STTIMER_SLOT(timer->stt_expires)) {
-                stt_timer_t *old = list_entry(pos, stt_timer_t, stt_list);
+	/* a simple insertion sort */
+	list_for_each_prev(pos, STTIMER_SLOT(timer->stt_expires)) {
+		struct stt_timer *old = list_entry(pos, struct stt_timer,
+						   stt_list);
 
-                if (cfs_time_aftereq(timer->stt_expires, old->stt_expires))
-                        break;
-        }
-        list_add(&timer->stt_list, pos);
+		if (timer->stt_expires >= old->stt_expires)
+			break;
+	}
+	list_add(&timer->stt_list, pos);
 
-        spin_unlock(&stt_data.stt_lock);
+	spin_unlock(&stt_data.stt_lock);
 }
 
 /*
@@ -77,129 +99,110 @@ stt_add_timer (stt_timer_t *timer)
  * another CPU.
  */
 int
-stt_del_timer (stt_timer_t *timer)
+stt_del_timer(struct stt_timer *timer)
 {
-        int ret = 0;
+	int ret = 0;
 
-        spin_lock(&stt_data.stt_lock);
+	spin_lock(&stt_data.stt_lock);
 
-#ifdef __KERNEL__
-        LASSERT (stt_data.stt_nthreads > 0);
-#endif
-        LASSERT (!stt_data.stt_shuttingdown);
+	LASSERT(stt_data.stt_nthreads > 0);
+	LASSERT(!stt_data.stt_shuttingdown);
 
-        if (!list_empty(&timer->stt_list)) {
-                ret = 1;
-                list_del_init(&timer->stt_list);
-        }
+	if (!list_empty(&timer->stt_list)) {
+		ret = 1;
+		list_del_init(&timer->stt_list);
+	}
 
-        spin_unlock(&stt_data.stt_lock);
-        return ret;
+	spin_unlock(&stt_data.stt_lock);
+	return ret;
 }
 
 /* called with stt_data.stt_lock held */
-int
-stt_expire_list (struct list_head *slot, cfs_time_t now)
+static int
+stt_expire_list(struct list_head *slot, time64_t now)
 {
-        int          expired = 0;
-        stt_timer_t *timer;
+	int	     expired = 0;
+	struct stt_timer *timer;
+
+	while (!list_empty(slot)) {
+		timer = list_entry(slot->next, struct stt_timer, stt_list);
 
-        while (!list_empty(slot)) {
-                timer = list_entry(slot->next, stt_timer_t, stt_list);
+		if (timer->stt_expires > now)
+			break;
 
-                if (cfs_time_after(timer->stt_expires, now))
-                        break;
+		list_del_init(&timer->stt_list);
+		spin_unlock(&stt_data.stt_lock);
 
-                list_del_init(&timer->stt_list);
-                spin_unlock(&stt_data.stt_lock);
+		expired++;
+		(*timer->stt_func) (timer->stt_data);
 
-                expired++;
-                (*timer->stt_func) (timer->stt_data);
-                
-                spin_lock(&stt_data.stt_lock);
-        }
+		spin_lock(&stt_data.stt_lock);
+	}
 
-        return expired;
+	return expired;
 }
 
-int
-stt_check_timers (cfs_time_t *last)
+static int
+stt_check_timers(time64_t *last)
 {
-        int        expired = 0;
-        cfs_time_t now;
-        cfs_time_t this_slot;
+	int expired = 0;
+	time64_t now;
+	time64_t this_slot;
 
-        now = cfs_time_current_sec();
-        this_slot = now & STTIMER_SLOTTIMEMASK;
+	now = ktime_get_real_seconds();
+	this_slot = now & STTIMER_SLOTTIMEMASK;
 
-        spin_lock(&stt_data.stt_lock);
+	spin_lock(&stt_data.stt_lock);
 
-        while (cfs_time_aftereq(this_slot, *last)) {
-                expired += stt_expire_list(STTIMER_SLOT(this_slot), now);
-                this_slot = cfs_time_sub(this_slot, STTIMER_SLOTTIME);
-        }
+	while (this_slot >= *last) {
+		expired += stt_expire_list(STTIMER_SLOT(this_slot), now);
+		this_slot = this_slot - STTIMER_SLOTTIME;
+	}
 
-        *last = now & STTIMER_SLOTTIMEMASK;
-        spin_unlock(&stt_data.stt_lock);
-        return expired;
+	*last = now & STTIMER_SLOTTIMEMASK;
+	spin_unlock(&stt_data.stt_lock);
+	return expired;
 }
 
-#ifdef __KERNEL__
 
-int
+static int
 stt_timer_main (void *arg)
 {
-        UNUSED(arg);
+        int rc = 0;
 
-        cfs_daemonize("st_timer");
         cfs_block_allsigs();
 
-        while (!stt_data.stt_shuttingdown) {
-                stt_check_timers(&stt_data.stt_prev_slot);
+	while (!stt_data.stt_shuttingdown) {
+		stt_check_timers(&stt_data.stt_prev_slot);
 
-                set_current_state(CFS_TASK_INTERRUPTIBLE);
-                cfs_schedule_timeout(CFS_TASK_INTERRUPTIBLE,
-                                     cfs_time_seconds(STTIMER_SLOTTIME));
-        }
+		rc = wait_event_timeout(stt_data.stt_waitq,
+					stt_data.stt_shuttingdown,
+					cfs_time_seconds(STTIMER_SLOTTIME));
+	}
 
-        spin_lock(&stt_data.stt_lock);
-        stt_data.stt_nthreads--;
-        spin_unlock(&stt_data.stt_lock);
-        return 0;
+	spin_lock(&stt_data.stt_lock);
+	stt_data.stt_nthreads--;
+	spin_unlock(&stt_data.stt_lock);
+	return rc;
 }
 
-int
+static int
 stt_start_timer_thread (void)
 {
-        long pid;
-
-        LASSERT (!stt_data.stt_shuttingdown);
-
-        pid = cfs_kernel_thread(stt_timer_main, NULL, 0);
-        if (pid < 0)
-                return (int)pid;
-
-        spin_lock(&stt_data.stt_lock);
-        stt_data.stt_nthreads++;
-        spin_unlock(&stt_data.stt_lock);
-        return 0;
-}
+	struct task_struct *task;
 
-#else /* !__KERNEL__ */
+	LASSERT(!stt_data.stt_shuttingdown);
 
-int
-stt_check_events (void)
-{
-        return stt_check_timers(&stt_data.stt_prev_slot);
-}
+	task = kthread_run(stt_timer_main, NULL, "st_timer");
+	if (IS_ERR(task))
+		return PTR_ERR(task);
 
-int
-stt_poll_interval (void)
-{
-        return STTIMER_SLOTTIME;
+	spin_lock(&stt_data.stt_lock);
+	stt_data.stt_nthreads++;
+	spin_unlock(&stt_data.stt_lock);
+	return 0;
 }
 
-#endif
 
 int
 stt_startup (void)
@@ -208,40 +211,37 @@ stt_startup (void)
         int i;
 
         stt_data.stt_shuttingdown = 0;
-        stt_data.stt_prev_slot = cfs_time_current_sec() & STTIMER_SLOTTIMEMASK;
+	stt_data.stt_prev_slot = ktime_get_real_seconds() & STTIMER_SLOTTIMEMASK;
 
-        spin_lock_init(&stt_data.stt_lock);
+	spin_lock_init(&stt_data.stt_lock);
         for (i = 0; i < STTIMER_NSLOTS; i++)
-                CFS_INIT_LIST_HEAD(&stt_data.stt_hash[i]);
+		INIT_LIST_HEAD(&stt_data.stt_hash[i]);
 
-#ifdef __KERNEL__
-        stt_data.stt_nthreads = 0;
-        rc = stt_start_timer_thread();
-        if (rc != 0)
-                CERROR ("Can't spawn timer, stt_startup() has failed: %d\n", rc);
-#endif
+	stt_data.stt_nthreads = 0;
+	init_waitqueue_head(&stt_data.stt_waitq);
+	rc = stt_start_timer_thread();
+	if (rc != 0)
+		CERROR ("Can't spawn timer thread: %d\n", rc);
 
         return rc;
 }
 
 void
-stt_shutdown (void)
+stt_shutdown(void)
 {
-        int i;
+	int i;
 
-        spin_lock(&stt_data.stt_lock);
+	spin_lock(&stt_data.stt_lock);
 
-        for (i = 0; i < STTIMER_NSLOTS; i++)
-                LASSERT (list_empty(&stt_data.stt_hash[i]));
+	for (i = 0; i < STTIMER_NSLOTS; i++)
+		LASSERT(list_empty(&stt_data.stt_hash[i]));
 
-        stt_data.stt_shuttingdown = 1;
+	stt_data.stt_shuttingdown = 1;
 
-#ifdef __KERNEL__
-        lst_wait_until(stt_data.stt_nthreads == 0, stt_data.stt_lock,
-                       "waiting for %d threads to terminate\n",
-                       stt_data.stt_nthreads);
-#endif
+	wake_up(&stt_data.stt_waitq);
+	lst_wait_until(stt_data.stt_nthreads == 0, stt_data.stt_lock,
+		       "waiting for %d threads to terminate\n",
+		       stt_data.stt_nthreads);
 
-        spin_unlock(&stt_data.stt_lock);
-        return;
+	spin_unlock(&stt_data.stt_lock);
 }