linux - Contrib clone of linux

Age	Commit message (Expand)	Author
2007-10-16	I/OAT: Add DCA services	Shannon Nelson
2007-10-16	DCA: Add Direct Cache Access driver	Shannon Nelson

/* * Read-Copy Update tracing for classic implementation * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * 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 for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * * Copyright IBM Corporation, 2008 * * Papers: http://www.rdrop.com/users/paulmck/RCU * * For detailed explanation of Read-Copy Update mechanism see - * Documentation/RCU * */ #include <linux/types.h> #include <linux/kernel.h> #include <linux/init.h> #include <linux/spinlock.h> #include <linux/smp.h> #include <linux/rcupdate.h> #include <linux/interrupt.h> #include <linux/sched.h> #include <asm/atomic.h> #include <linux/bitops.h> #include <linux/module.h> #include <linux/completion.h> #include <linux/moduleparam.h> #include <linux/percpu.h> #include <linux/notifier.h> #include <linux/cpu.h> #include <linux/mutex.h> #include <linux/debugfs.h> #include <linux/seq_file.h> #define RCU_TREE_NONCORE #include "rcutree.h" static void print_one_rcu_data(struct seq_file *m, struct rcu_data *rdp) { if (!rdp->beenonline) return; seq_printf(m, "%3d%cc=%ld g=%ld pq=%d pqc=%ld qp=%d", rdp->cpu, cpu_is_offline(rdp->cpu) ? '!' : ' ', rdp->completed, rdp->gpnum, rdp->passed_quiesc, rdp->passed_quiesc_completed, rdp->qs_pending); #ifdef CONFIG_NO_HZ seq_printf(m, " dt=%d/%d dn=%d df=%lu", rdp->dynticks->dynticks, rdp->dynticks->dynticks_nesting, rdp->dynticks->dynticks_nmi, rdp->dynticks_fqs); #endif /* #ifdef CONFIG_NO_HZ */ seq_printf(m, " of=%lu ri=%lu", rdp->offline_fqs, rdp->resched_ipi); seq_printf(m, " ql=%ld b=%ld\n", rdp->qlen, rdp->blimit); } #define PRINT_RCU_DATA(name, func, m) \ do { \ int _p_r_d_i; \ \ for_each_possible_cpu(_p_r_d_i) \ func(m, &per_cpu(name, _p_r_d_i)); \ } while (0) static int show_rcudata(struct seq_file *m, void *unused) { #ifdef CONFIG_TREE_PREEMPT_RCU seq_puts(m, "rcu_preempt:\n"); PRINT_RCU_DATA(rcu_preempt_data, print_one_rcu_data, m); #endif /* #ifdef CONFIG_TREE_PREEMPT_RCU */ seq_puts(m, "rcu_sched:\n"); PRINT_RCU_DATA(rcu_sched_data, print_one_rcu_data, m); seq_puts(m, "rcu_bh:\n"); PRINT_RCU_DATA(rcu_bh_data, print_one_rcu_data, m); return 0; } static int rcudata_open(struct inode *inode, struct file *file) { return single_open(file, show_rcudata, NULL); } static const struct file_operations rcudata_fops = { .owner = THIS_MODULE, .open = rcudata_open, .read = seq_read, .llseek = seq_lseek, .release = single_release, }; static void print_one_rcu_data_csv(struct seq_file *m, struct rcu_data *rdp) { if (!rdp->beenonline) return; seq_printf(m, "%d,%s,%ld,%ld,%d,%ld,%d", rdp->cpu, cpu_is_offline(rdp->cpu) ? "\"N\"" : "\"Y\"", rdp->completed, rdp->gpnum, rdp->passed_quiesc, rdp->passed_quiesc_completed, rdp->qs_pending); #ifdef CONFIG_NO_HZ seq_printf(m, ",%d,%d,%d,%lu", rdp->dynticks->dynticks, rdp->dynticks->dynticks_nesting, rdp->dynticks->dynticks_nmi, rdp->dynticks_fqs); #endif /* #ifdef CONFIG_NO_HZ */ seq_printf(m, ",%lu,%lu", rdp->offline_fqs, rdp->resched_ipi); seq_printf(m, ",%ld,%ld\n", rdp->qlen, rdp->blimit); } static int show_rcudata_csv(struct seq_file *m, void *unused) { seq_puts(m, "\"CPU\",\"Online?\",\"c\",\"g\",\"pq\",\"pqc\",\"pq\","); #ifdef CONFIG_NO_HZ seq_puts(m, "\"dt\",\"dt nesting\",\"dn\",\"df\","); #endif /* #ifdef CONFIG_NO_HZ */ seq_puts(m, "\"of\",\"ri\",\"ql\",\"b\"\n"); #ifdef CONFIG_TREE_PREEMPT_RCU seq_puts(m, "\"rcu_preempt:\"\n"); PRINT_RCU_DATA(rcu_preempt_data, print_one_rcu_data_csv, m); #endif /* #ifdef CONFIG_TREE_PREEMPT_RCU */ seq_puts(m, "\"rcu_sched:\"\n"); PRINT_RCU_DATA(rcu_sched_data, print_one_rcu_data_csv, m); seq_puts(m, "\"rcu_bh:\"\n"); PRINT_RCU_DATA(rcu_bh_data, print_one_rcu_data_csv, m); return 0; } static int rcudata_csv_open(struct inode *inode, struct file *file) { return single_open(file, show_rcudata_csv, NULL); } static const struct file_operations rcudata_csv_fops = { .owner = THIS_MODULE, .open = rcudata_csv_open, .read = seq_read, .llseek = seq_lseek, .release = single_release, }; static void print_one_rcu_state(struct seq_file *m, struct rcu_state *rsp) { long gpnum; int level = 0; int phase; struct rcu_node *rnp; gpnum = rsp->gpnum; seq_printf(m, "c=%ld g=%ld s=%d jfq=%ld j=%x " "nfqs=%lu/nfqsng=%lu(%lu) fqlh=%lu oqlen=%ld\n", rsp->completed, gpnum, rsp->signaled, (long)(rsp->jiffies_force_qs - jiffies), (int)(jiffies & 0xffff), rsp->n_force_qs, rsp->n_force_qs_ngp, rsp->n_force_qs - rsp->n_force_qs_ngp, rsp->n_force_qs_lh, rsp->orphan_qlen); for (rnp = &rsp->node[0]; rnp - &rsp->node[0] < NUM_RCU_NODES; rnp++) { if (rnp->level != level) { seq_puts(m, "\n"); level = rnp->level; } phase = gpnum & 0x1; seq_printf(m, "%lx/%lx %c%c>%c%c %d:%d ^%d ", rnp->qsmask, rnp->qsmaskinit, "T."[list_empty(&rnp->blocked_tasks[phase])], "E."[list_empty(&rnp->blocked_tasks[phase + 2])], "T."[list_empty(&rnp->blocked_tasks[!phase])], "E."[list_empty(&rnp->blocked_tasks[!phase + 2])], rnp->grplo, rnp->grphi, rnp->grpnum); } seq_puts(m, "\n"); } static int show_rcuhier(struct seq_file *m, void *unused) { #ifdef CONFIG_TREE_PREEMPT_RCU seq_puts(m, "rcu_preempt:\n"); print_one_rcu_state(m, &rcu_preempt_state); #endif /* #ifdef CONFIG_TREE_PREEMPT_RCU */ seq_puts(m, "rcu_sched:\n"); print_one_rcu_state(m, &rcu_sched_state); seq_puts(m, "rcu_bh:\n"); print_one_rcu_state(m, &rcu_bh_state); return 0; } static int rcuhier_open(struct inode *inode, struct file *file) { return single_open(file, show_rcuhier, NULL); } static const struct file_operations rcuhier_fops = { .owner = THIS_MODULE, .open = rcuhier_open, .read = seq_read, .llseek = seq_lseek, .release = single_release, }; static int show_rcugp(struct seq_file *m, void *unused) { #ifdef CONFIG_TREE_PREEMPT_RCU seq_printf(m, "rcu_preempt: completed=%ld gpnum=%ld\n", rcu_preempt_state.completed, rcu_preempt_state.gpnum); #endif /* #ifdef CONFIG_TREE_PREEMPT_RCU */ seq_printf(m, "rcu_sched: completed=%ld gpnum=%ld\n", rcu_sched_state.completed, rcu_sched_state.gpnum); seq_printf(m, "rcu_bh: completed=%ld gpnum=%ld\n", rcu_bh_state.completed, rcu_bh_state.gpnum); return 0; } static int rcugp_open(struct inode *inode, struct file *file) { return single_open(file, show_rcugp, NULL); } static const struct file_operations rcugp_fops = { .owner = THIS_MODULE, .open = rcugp_open, .read = seq_read, .llseek = seq_lseek, .release = single_release, }; static void print_one_rcu_pending(struct seq_file *m, struct rcu_data *rdp) { seq_printf(m, "%3d%cnp=%ld " &q