sched/numa: Add debugging

Signed-off-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Rik van Riel <riel@redhat.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: http://lkml.kernel.org/r/1381141781-10992-53-git-send-email-mgorman@suse.de

1 files changed, 58 insertions, 2 deletions

diff --git a/kernel/sched/debug.c b/kernel/sched/debug.c
index 196559994f7c..e6ba5e31c7ca 100644
--- a/kernel/sched/debug.c
+++ b/kernel/sched/debug.c
@@ -15,6 +15,7 @@
 #include <linux/seq_file.h>
 #include <linux/kallsyms.h>
 #include <linux/utsname.h>
+#include <linux/mempolicy.h>
 
 #include "sched.h"
 
@@ -137,6 +138,9 @@ print_task(struct seq_file *m, struct rq *rq, struct task_struct *p)
         SEQ_printf(m, "%15Ld %15Ld %15Ld.%06ld %15Ld.%06ld %15Ld.%06ld",
                 0LL, 0LL, 0LL, 0L, 0LL, 0L, 0LL, 0L);
 #endif
+#ifdef CONFIG_NUMA_BALANCING
+        SEQ_printf(m, " %d", cpu_to_node(task_cpu(p)));
+#endif
 #ifdef CONFIG_CGROUP_SCHED
         SEQ_printf(m, " %s", task_group_path(task_group(p)));
 #endif
@@ -159,7 +163,7 @@ static void print_rq(struct seq_file *m, struct rq *rq, int rq_cpu)
         read_lock_irqsave(&tasklist_lock, flags);
 
         do_each_thread(g, p) {
-                if (!p->on_rq || task_cpu(p) != rq_cpu)
+                if (task_cpu(p) != rq_cpu)
                         continue;
 
                 print_task(m, rq, p);
@@ -345,7 +349,7 @@ static void sched_debug_header(struct seq_file *m)
         cpu_clk = local_clock();
         local_irq_restore(flags);
 
-        SEQ_printf(m, "Sched Debug Version: v0.10, %s %.*s\n",
+        SEQ_printf(m, "Sched Debug Version: v0.11, %s %.*s\n",
                 init_utsname()->release,
                 (int)strcspn(init_utsname()->version, " "),
                 init_utsname()->version);
@@ -488,6 +492,56 @@ static int __init init_sched_debug_procfs(void)
 
 __initcall(init_sched_debug_procfs);
 
+#define __P(F) \
+        SEQ_printf(m, "%-45s:%21Ld\n", #F, (long long)F)
+#define P(F) \
+        SEQ_printf(m, "%-45s:%21Ld\n", #F, (long long)p->F)
+#define __PN(F) \
+        SEQ_printf(m, "%-45s:%14Ld.%06ld\n", #F, SPLIT_NS((long long)F))
+#define PN(F) \
+        SEQ_printf(m, "%-45s:%14Ld.%06ld\n", #F, SPLIT_NS((long long)p->F))
+
+
+static void sched_show_numa(struct task_struct *p, struct seq_file *m)
+{
+#ifdef CONFIG_NUMA_BALANCING
+        struct mempolicy *pol;
+        int node, i;
+
+        if (p->mm)
+                P(mm->numa_scan_seq);
+
+        task_lock(p);
+        pol = p->mempolicy;
+        if (pol && !(pol->flags & MPOL_F_MORON))
+                pol = NULL;
+        mpol_get(pol);
+        task_unlock(p);
+
+        SEQ_printf(m, "numa_migrations, %ld\n", xchg(&p->numa_pages_migrated, 0));
+
+        for_each_online_node(node) {
+                for (i = 0; i < 2; i++) {
+                        unsigned long nr_faults = -1;
+                        int cpu_current, home_node;
+
+                        if (p->numa_faults)
+                                nr_faults = p->numa_faults[2*node + i];
+
+                        cpu_current = !i ? (task_node(p) == node) :
+                                (pol && node_isset(node, pol->v.nodes));
+
+                        home_node = (p->numa_preferred_nid == node);
+
+                        SEQ_printf(m, "numa_faults, %d, %d, %d, %d, %ld\n",
+                                i, node, cpu_current, home_node, nr_faults);
+                }
+        }
+
+        mpol_put(pol);
+#endif
+}
+
 void proc_sched_show_task(struct task_struct *p, struct seq_file *m)
 {
         unsigned long nr_switches;
@@ -591,6 +645,8 @@ void proc_sched_show_task(struct task_struct *p, struct seq_file *m)
                 SEQ_printf(m, "%-45s:%21Ld\n",
                            "clock-delta", (long long)(t1-t0));
         }
+
+        sched_show_numa(p, m);
 }
 
 void proc_sched_set_task(struct task_struct *p)