sched_credit2: more info when dumping

more specifically, for each runqueue, print what pCPUs
belong to it, which ones are idle and which ones have
been tickled.

While there, also convert the whole file to use
keyhandler_scratch for printing cpumask-s.

Signed-off-by: Dario Faggioli <dario.faggioli@citrix.com>
Reviewed-by: George Dunlap <george.dunlap@eu.citrix.com>

diff --git a/xen/common/sched_credit2.c b/xen/common/sched_credit2.c
index b501f286397e3ce036e42f6236335dcbd026615f..75e03215f8a7c85e219ce876001c486145f04e38 100644 (file)
--- a/xen/common/sched_credit2.c
+++ b/xen/common/sched_credit2.c
@@ -25,6 +25,7 @@
 #include <xen/errno.h>
 #include <xen/trace.h>
 #include <xen/cpu.h>
+#include <xen/keyhandler.h>
 
 #define d2printk(x...)
 //#define d2printk printk
@@ -1836,7 +1837,7 @@ csched2_dump_pcpu(const struct scheduler *ops, int cpu)
     unsigned long flags;
     spinlock_t *lock;
     int loop;
-    char cpustr[100];
+#define cpustr keyhandler_scratch
 
     /*
      * We need both locks:
@@ -1877,6 +1878,7 @@ csched2_dump_pcpu(const struct scheduler *ops, int cpu)
 
     spin_unlock(lock);
     spin_unlock_irqrestore(&prv->lock, flags);
+#undef cpustr
 }
 
 static void
@@ -1886,6 +1888,7 @@ csched2_dump(const struct scheduler *ops)
     struct csched2_private *prv = CSCHED2_PRIV(ops);
     unsigned long flags;
     int i, loop;
+#define cpustr keyhandler_scratch
 
     /* We need the private lock as we access global scheduler data
      * and (below) the list of active domains. */
@@ -1901,17 +1904,24 @@ csched2_dump(const struct scheduler *ops)
         
         fraction = prv->rqd[i].avgload * 100 / (1ULL<<prv->load_window_shift);
 
+        cpulist_scnprintf(cpustr, sizeof(cpustr), &prv->rqd[i].active);
         printk("Runqueue %d:\n"
                "\tncpus              = %u\n"
+               "\tcpus               = %s\n"
                "\tmax_weight         = %d\n"
                "\tinstload           = %d\n"
                "\taveload            = %3"PRI_stime"\n",
                i,
                cpumask_weight(&prv->rqd[i].active),
+               cpustr,
                prv->rqd[i].max_weight,
                prv->rqd[i].load,
                fraction);
 
+        cpumask_scnprintf(cpustr, sizeof(cpustr), &prv->rqd[i].idle);
+        printk("\tidlers: %s\n", cpustr);
+        cpumask_scnprintf(cpustr, sizeof(cpustr), &prv->rqd[i].tickled);
+        printk("\ttickled: %s\n", cpustr);
     }
 
     printk("Domain info:\n");
@@ -1942,6 +1952,7 @@ csched2_dump(const struct scheduler *ops)
     }
 
     spin_unlock_irqrestore(&prv->lock, flags);
+#undef cpustr
 }
 
 static void activate_runqueue(struct csched2_private *prv, int rqi)