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timers/itimer: Convert internal cputime_t units to nsec

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Use the new nsec based cputime accessors as part of the whole cputime
conversion from cputime_t to nsecs.

Also convert itimers to use nsec based internal counters. This simplifies
it and removes the whole game with error/inc_error which served to deal
with cputime_t random granularity.

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Stanislaw Gruszka <sgruszka@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Wanpeng Li <wanpeng.li@hotmail.com>
Link: http://lkml.kernel.org/r/1485832191-26889-20-git-send-email-fweisbec@gmail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Frederic Weisbecker
2017-01-31 04:09:35 +01:00
committed by Ingo Molnar
parent ebd7e7fc4b
commit 858cf3a8c5
5 changed files with 55 additions and 86 deletions
Download Patch File Download Diff File Expand all files Collapse all files

26
include/trace/events/timer.h
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@@ -269,17 +269,17 @@ DEFINE_EVENT(hrtimer_class, hrtimer_cancel,
TRACE_EVENT(itimer_state,
TP_PROTO(int which, const struct itimerval *const value,
cputime_t expires),
unsigned long long expires),
TP_ARGS(which, value, expires),
TP_STRUCT__entry(
__field( int, which )
__field( cputime_t, expires )
__field( long, value_sec )
__field( long, value_usec )
__field( long, interval_sec )
__field( long, interval_usec )
__field( int, which )
__field( unsigned long long, expires )
__field( long, value_sec )
__field( long, value_usec )
__field( long, interval_sec )
__field( long, interval_usec )
),
TP_fast_assign(
@@ -292,7 +292,7 @@ TRACE_EVENT(itimer_state,
),
TP_printk("which=%d expires=%llu it_value=%ld.%ld it_interval=%ld.%ld",
__entry->which, (unsigned long long)__entry->expires,
__entry->which, __entry->expires,
__entry->value_sec, __entry->value_usec,
__entry->interval_sec, __entry->interval_usec)
);
@@ -305,14 +305,14 @@ TRACE_EVENT(itimer_state,
*/
TRACE_EVENT(itimer_expire,
TP_PROTO(int which, struct pid *pid, cputime_t now),
TP_PROTO(int which, struct pid *pid, unsigned long long now),
TP_ARGS(which, pid, now),
TP_STRUCT__entry(
__field( int , which )
__field( pid_t, pid )
__field( cputime_t, now )
__field( int , which )
__field( pid_t, pid )
__field( unsigned long long, now )
),
TP_fast_assign(
@@ -322,7 +322,7 @@ TRACE_EVENT(itimer_expire,
),
TP_printk("which=%d pid=%d now=%llu", __entry->which,
(int) __entry->pid, (unsigned long long)__entry->now)
(int) __entry->pid, __entry->now)
);
#ifdef CONFIG_NO_HZ_COMMON