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authorMartin Schwidefsky <schwidefsky@de.ibm.com>2015-08-21 16:05:32 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2015-10-14 14:32:06 +0200
commitb5a6b71b1901b9ca495f669c9ad86f2181960aba (patch)
tree26279ca6f071672d96ac6713c7ce4997d84482de /arch/s390/kernel/diag.c
parent1ec2772e0c3ca3159035c03165355e355efc326b (diff)
downloadlinux-b5a6b71b1901b9ca495f669c9ad86f2181960aba.tar.bz2
s390/diag: add tracepoint for diagnose calls
To be able to analyse problems in regard to hypervisor overhead add a tracepoing for diagnose calls. It reports the number of the diagnose issued, e.g. sshd-1385 [002] .... 42.701431: diagnose: nr=0x9c <idle>-0 [001] ..s. 43.587528: diagnose: nr=0x9c Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/kernel/diag.c')
-rw-r--r--arch/s390/kernel/diag.c22
1 files changed, 20 insertions, 2 deletions
diff --git a/arch/s390/kernel/diag.c b/arch/s390/kernel/diag.c
index 4ddb5200ddf0..f98766ede4e1 100644
--- a/arch/s390/kernel/diag.c
+++ b/arch/s390/kernel/diag.c
@@ -10,9 +10,13 @@
#include <linux/seq_file.h>
#include <linux/debugfs.h>
#include <asm/diag.h>
+#include <asm/trace/diag.h>
-DEFINE_PER_CPU(struct diag_stat, diag_stat);
-EXPORT_PER_CPU_SYMBOL(diag_stat);
+struct diag_stat {
+ unsigned int counter[NR_DIAG_STAT];
+};
+
+static DEFINE_PER_CPU(struct diag_stat, diag_stat);
struct diag_desc {
int code;
@@ -114,6 +118,20 @@ static int __init show_diag_stat_init(void)
device_initcall(show_diag_stat_init);
+void diag_stat_inc(enum diag_stat_enum nr)
+{
+ this_cpu_inc(diag_stat.counter[nr]);
+ trace_diagnose(diag_map[nr].code);
+}
+EXPORT_SYMBOL(diag_stat_inc);
+
+void diag_stat_inc_norecursion(enum diag_stat_enum nr)
+{
+ this_cpu_inc(diag_stat.counter[nr]);
+ trace_diagnose_norecursion(diag_map[nr].code);
+}
+EXPORT_SYMBOL(diag_stat_inc_norecursion);
+
/*
* Diagnose 14: Input spool file manipulation
*/