The event kernel.sched_try_wakeup can occur for process already running on the
CPU (in kernel/sched.c:try_to_wakeup). Hence, in this condition, this event
must not change the state of the process to LTTV_STATE_WAIT_CPU.
---
lttv/lttv/state.c | 10 ++++++++--
1 files changed, 8 insertions(+), 2 deletions(-)
diff --git a/lttv/lttv/state.c b/lttv/lttv/state.c
index bd3f64d..cdf5d26 100644
--- a/lttv/lttv/state.c
+++ b/lttv/lttv/state.c
@@ -2941,6 +2941,9 @@ static gboolean dump_softirq(void *hook_data, void
*call_data)
static gboolean sched_try_wakeup(void *hook_data, void *call_data)
{
LttvTracefileState *s = (LttvTracefileState *)call_data;
+ guint cpu = s->cpu;
+ LttvTraceState *ts = (LttvTraceState*)s->parent.t_context;
+ LttvProcessState *running_process = ts->running_process[cpu];
LttEvent *e = ltt_tracefile_get_event(s->parent.tf);
LttvTraceHook *th = (LttvTraceHook *)hook_data;
LttvProcessState *process;
@@ -2954,8 +2957,11 @@ static gboolean sched_try_wakeup(void *hook_data, void
*call_data)
(LttvTraceState*)s->parent.t_context,
woken_cpu, woken_pid,
&s->parent.timestamp);
- process->state->s = LTTV_STATE_WAIT_CPU;
- process->state->change = s->parent.timestamp;
+ if (running_process != process)
+ {
+ process->state->s = LTTV_STATE_WAIT_CPU;
+ process->state->change = s->parent.timestamp;
+ }
g_debug("Wakeup: process %d on CPU %u\n", woken_pid, woken_cpu);
--
1.7.1
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