Messages in this thread Patch in this message | | | Date | Fri, 24 Jul 2009 18:43:45 +0800 | From | Zhaolei <> | Subject | [RFC PATCH 2/3] Apply walltime-supporting functions to trace system |
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We modified ring-buffer function's arguments to support walltime recording. There function's caller site needs to be updated to support it.
Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com> --- include/linux/ftrace_event.h | 1 + kernel/trace/trace.c | 25 +++++++++++++++---------- kernel/trace/trace.h | 3 ++- kernel/trace/trace_output.c | 2 +- 4 files changed, 19 insertions(+), 12 deletions(-)
diff --git a/include/linux/ftrace_event.h b/include/linux/ftrace_event.h index 5c093ff..4ffd87a 100644 --- a/include/linux/ftrace_event.h +++ b/include/linux/ftrace_event.h @@ -58,6 +58,7 @@ struct trace_iterator { struct trace_entry *ent; int cpu; u64 ts; + struct timespec timespec; loff_t pos; long idx; diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index 22787b3..af25bec 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -1399,7 +1399,8 @@ static void trace_iterator_increment(struct trace_iterator *iter) } static struct trace_entry * -peek_next_entry(struct trace_iterator *iter, int cpu, u64 *ts) +peek_next_entry(struct trace_iterator *iter, int cpu, u64 *ts, + struct timespec *timespec) { struct ring_buffer_event *event; struct ring_buffer_iter *buf_iter = iter->buffer_iter[cpu]; @@ -1408,9 +1409,9 @@ peek_next_entry(struct trace_iterator *iter, int cpu, u64 *ts) ftrace_disable_cpu(); if (buf_iter) - event = ring_buffer_iter_peek(buf_iter, ts, NULL); + event = ring_buffer_iter_peek(buf_iter, ts, timespec); else - event = ring_buffer_peek(iter->tr->buffer, cpu, ts, NULL); + event = ring_buffer_peek(iter->tr->buffer, cpu, ts, timespec); ftrace_enable_cpu(); @@ -1418,7 +1419,8 @@ peek_next_entry(struct trace_iterator *iter, int cpu, u64 *ts) } static struct trace_entry * -__find_next_entry(struct trace_iterator *iter, int *ent_cpu, u64 *ent_ts) +__find_next_entry(struct trace_iterator *iter, int *ent_cpu, u64 *ent_ts, + struct timespec *timespec) { struct ring_buffer *buffer = iter->tr->buffer; struct trace_entry *ent, *next = NULL; @@ -1434,7 +1436,7 @@ __find_next_entry(struct trace_iterator *iter, int *ent_cpu, u64 *ent_ts) if (cpu_file > TRACE_PIPE_ALL_CPU) { if (ring_buffer_empty_cpu(buffer, cpu_file)) return NULL; - ent = peek_next_entry(iter, cpu_file, ent_ts); + ent = peek_next_entry(iter, cpu_file, ent_ts, timespec); if (ent_cpu) *ent_cpu = cpu_file; @@ -1446,7 +1448,7 @@ __find_next_entry(struct trace_iterator *iter, int *ent_cpu, u64 *ent_ts) if (ring_buffer_empty_cpu(buffer, cpu)) continue; - ent = peek_next_entry(iter, cpu, &ts); + ent = peek_next_entry(iter, cpu, &ts, timespec); /* * Pick the entry with the smallest timestamp: @@ -1469,15 +1471,17 @@ __find_next_entry(struct trace_iterator *iter, int *ent_cpu, u64 *ent_ts) /* Find the next real entry, without updating the iterator itself */ struct trace_entry *trace_find_next_entry(struct trace_iterator *iter, - int *ent_cpu, u64 *ent_ts) + int *ent_cpu, u64 *ent_ts, + struct timespec *timespec) { - return __find_next_entry(iter, ent_cpu, ent_ts); + return __find_next_entry(iter, ent_cpu, ent_ts, timespec); } /* Find the next real entry, and increment the iterator to the next entry */ static void *find_next_entry_inc(struct trace_iterator *iter) { - iter->ent = __find_next_entry(iter, &iter->cpu, &iter->ts); + iter->ent = __find_next_entry(iter, &iter->cpu, &iter->ts, + &iter->timespec); if (iter->ent) trace_iterator_increment(iter); @@ -1489,7 +1493,8 @@ static void trace_consume(struct trace_iterator *iter) { /* Don't allow ftrace to trace into the ring buffers */ ftrace_disable_cpu(); - ring_buffer_consume(iter->tr->buffer, iter->cpu, &iter->ts, NULL); + ring_buffer_consume(iter->tr->buffer, iter->cpu, &iter->ts, + &iter->timespec); ftrace_enable_cpu(); } diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h index 06886a0..fb3dcc8 100644 --- a/kernel/trace/trace.h +++ b/kernel/trace/trace.h @@ -452,7 +452,8 @@ struct trace_entry *tracing_get_trace_entry(struct trace_array *tr, struct trace_array_cpu *data); struct trace_entry *trace_find_next_entry(struct trace_iterator *iter, - int *ent_cpu, u64 *ent_ts); + int *ent_cpu, u64 *ent_ts, + struct timespec *timtspec); void tracing_generic_entry_update(struct trace_entry *entry, unsigned long flags, diff --git a/kernel/trace/trace_output.c b/kernel/trace/trace_output.c index e0c2545..f5c7f0c 100644 --- a/kernel/trace/trace_output.c +++ b/kernel/trace/trace_output.c @@ -519,7 +519,7 @@ int trace_print_lat_context(struct trace_iterator *iter) struct trace_seq *s = &iter->seq; struct trace_entry *entry = iter->ent, *next_entry = trace_find_next_entry(iter, NULL, - &next_ts); + &next_ts, NULL); unsigned long verbose = (trace_flags & TRACE_ITER_VERBOSE); unsigned long abs_usecs = ns2usecs(iter->ts - iter->tr->time_start); unsigned long rel_usecs; -- 1.5.5.3
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