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s390/diag: add tracepoint for diagnose calls

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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>
This commit is contained in:
Martin Schwidefsky
2015-08-21 16:05:32 +02:00
parent 1ec2772e0c
commit b5a6b71b19
6 changed files with 98 additions and 14 deletions
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43
arch/s390/include/asm/trace/diag.h Normal file
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@@ -0,0 +1,43 @@
/*
* Tracepoint header for s390 diagnose calls
*
* Copyright IBM Corp. 2015
* Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
*/
#undef TRACE_SYSTEM
#define TRACE_SYSTEM s390
#if !defined(_TRACE_S390_DIAG_H) || defined(TRACE_HEADER_MULTI_READ)
#define _TRACE_S390_DIAG_H
#include <linux/tracepoint.h>
#undef TRACE_INCLUDE_PATH
#undef TRACE_INCLUDE_FILE
#define TRACE_INCLUDE_PATH asm/trace
#define TRACE_INCLUDE_FILE diag
TRACE_EVENT(diagnose,
TP_PROTO(unsigned short nr),
TP_ARGS(nr),
TP_STRUCT__entry(
__field(unsigned short, nr)
),
TP_fast_assign(
__entry->nr = nr;
),
TP_printk("nr=0x%x", __entry->nr)
);
#ifdef CONFIG_TRACEPOINTS
void trace_diagnose_norecursion(int diag_nr);
#else
static inline void trace_diagnose_norecursion(int diag_nr) { }
#endif
#endif /* _TRACE_S390_DIAG_H */
/* This part must be outside protection */
#include <trace/define_trace.h>