From 80b5e940050c273ba277acbf3a9fbc1d4441e681 Mon Sep 17 00:00:00 2001
From: Peter Zijlstra <peterz@infradead.org>
Date: Thu, 4 Sep 2008 10:24:16 +0200
Subject: ftrace: sched_switch: show the wakee's cpu
While profiling the smp behaviour of the scheduler it was needed to know to
which cpu a task got woken.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---
kernel/trace/trace.c | 12 +++++++++---
kernel/trace/trace.h | 1 +
2 files changed, 10 insertions(+), 3 deletions(-)
(limited to 'kernel')
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 8a00d6c..7e6cb4f 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -977,6 +977,7 @@ tracing_sched_switch_trace(struct trace_array *tr,
entry->field.ctx.next_pid = next->pid;
entry->field.ctx.next_prio = next->prio;
entry->field.ctx.next_state = next->state;
+ entry->field.ctx.next_cpu = task_cpu(next);
__trace_stack(tr, data, flags, 5);
__raw_spin_unlock(&data->lock);
raw_local_irq_restore(irq_flags);
@@ -1003,6 +1004,7 @@ tracing_sched_wakeup_trace(struct trace_array *tr,
entry->field.ctx.next_pid = wakee->pid;
entry->field.ctx.next_prio = wakee->prio;
entry->field.ctx.next_state = wakee->state;
+ entry->field.ctx.next_cpu = task_cpu(wakee);
__trace_stack(tr, data, flags, 6);
__raw_spin_unlock(&data->lock);
raw_local_irq_restore(irq_flags);
@@ -1636,10 +1638,11 @@ print_lat_fmt(struct trace_iterator *iter, unsigned int trace_idx, int cpu)
__ffs(field->ctx.prev_state) + 1 : 0;
S = state < sizeof(state_to_char) - 1 ? state_to_char[state] : 'X';
comm = trace_find_cmdline(field->ctx.next_pid);
- trace_seq_printf(s, " %5d:%3d:%c %s %5d:%3d:%c %s\n",
+ trace_seq_printf(s, " %5d:%3d:%c %s [%03d] %5d:%3d:%c %s\n",
field->ctx.prev_pid,
field->ctx.prev_prio,
S, entry->type == TRACE_CTX ? "==>" : " +",
+ field->ctx.next_cpu,
field->ctx.next_pid,
field->ctx.next_prio,
T, comm);
@@ -1736,11 +1739,12 @@ static int print_trace_fmt(struct trace_iterator *iter)
state_to_char[field->ctx.prev_state] : 'X';
T = field->ctx.next_state < sizeof(state_to_char) ?
state_to_char[field->ctx.next_state] : 'X';
- ret = trace_seq_printf(s, " %5d:%3d:%c %s %5d:%3d:%c\n",
+ ret = trace_seq_printf(s, " %5d:%3d:%c %s [%03d] %5d:%3d:%c\n",
field->ctx.prev_pid,
field->ctx.prev_prio,
S,
entry->type == TRACE_CTX ? "==>" : " +",
+ field->ctx.next_cpu,
field->ctx.next_pid,
field->ctx.next_prio,
T);
@@ -1817,10 +1821,11 @@ static int print_raw_fmt(struct trace_iterator *iter)
state_to_char[field->ctx.next_state] : 'X';
if (entry->type == TRACE_WAKE)
S = '+';
- ret = trace_seq_printf(s, "%d %d %c %d %d %c\n",
+ ret = trace_seq_printf(s, "%d %d %c %d %d %d %c\n",
field->ctx.prev_pid,
field->ctx.prev_prio,
S,
+ field->ctx.next_cpu,
field->ctx.next_pid,
field->ctx.next_prio,
T);
@@ -1893,6 +1898,7 @@ static int print_hex_fmt(struct trace_iterator *iter)
SEQ_PUT_HEX_FIELD_RET(s, field->ctx.prev_pid);
SEQ_PUT_HEX_FIELD_RET(s, field->ctx.prev_prio);
SEQ_PUT_HEX_FIELD_RET(s, S);
+ SEQ_PUT_HEX_FIELD_RET(s, field->ctx.next_cpu);
SEQ_PUT_HEX_FIELD_RET(s, field->ctx.next_pid);
SEQ_PUT_HEX_FIELD_RET(s, field->ctx.next_prio);
SEQ_PUT_HEX_FIELD_RET(s, T);
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index 5f54c87..77c265f 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -41,6 +41,7 @@ struct ctx_switch_entry {
unsigned int next_pid;
unsigned char next_prio;
unsigned char next_state;
+ unsigned int next_cpu;
};
/*
--
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