forked from mirrors/linux
ccc319dcb4
Per task wakeup while not running (wwnr) monitor. This model is broken, the reason is that a task can be running in the processor without being set as RUNNABLE. Think about a task about to sleep: 1: set_current_state(TASK_UNINTERRUPTIBLE); 2: schedule(); And then imagine an IRQ happening in between the lines one and two, waking the task up. BOOM, the wakeup will happen while the task is running. Q: Why do we need this model, so? A: To test the reactors. Link: https://lkml.kernel.org/r/473c0fc39967250fdebcff8b620311c11dccad30.1659052063.git.bristot@kernel.org Cc: Wim Van Sebroeck <wim@linux-watchdog.org> Cc: Guenter Roeck <linux@roeck-us.net> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Ingo Molnar <mingo@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Will Deacon <will@kernel.org> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Marco Elver <elver@google.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: "Paul E. McKenney" <paulmck@kernel.org> Cc: Shuah Khan <skhan@linuxfoundation.org> Cc: Gabriele Paoloni <gpaoloni@redhat.com> Cc: Juri Lelli <juri.lelli@redhat.com> Cc: Clark Williams <williams@redhat.com> Cc: Tao Zhou <tao.zhou@linux.dev> Cc: Randy Dunlap <rdunlap@infradead.org> Cc: linux-doc@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: linux-trace-devel@vger.kernel.org Signed-off-by: Daniel Bristot de Oliveira <bristot@kernel.org> Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
142 lines
3.6 KiB
C
142 lines
3.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#undef TRACE_SYSTEM
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#define TRACE_SYSTEM rv
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#if !defined(_TRACE_RV_H) || defined(TRACE_HEADER_MULTI_READ)
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#define _TRACE_RV_H
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#include <linux/rv.h>
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#include <linux/tracepoint.h>
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#ifdef CONFIG_DA_MON_EVENTS_IMPLICIT
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DECLARE_EVENT_CLASS(event_da_monitor,
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TP_PROTO(char *state, char *event, char *next_state, bool final_state),
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TP_ARGS(state, event, next_state, final_state),
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TP_STRUCT__entry(
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__array( char, state, MAX_DA_NAME_LEN )
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__array( char, event, MAX_DA_NAME_LEN )
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__array( char, next_state, MAX_DA_NAME_LEN )
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__field( bool, final_state )
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),
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TP_fast_assign(
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memcpy(__entry->state, state, MAX_DA_NAME_LEN);
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memcpy(__entry->event, event, MAX_DA_NAME_LEN);
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memcpy(__entry->next_state, next_state, MAX_DA_NAME_LEN);
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__entry->final_state = final_state;
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),
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TP_printk("%s x %s -> %s %s",
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__entry->state,
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__entry->event,
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__entry->next_state,
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__entry->final_state ? "(final)" : "")
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);
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DECLARE_EVENT_CLASS(error_da_monitor,
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TP_PROTO(char *state, char *event),
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TP_ARGS(state, event),
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TP_STRUCT__entry(
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__array( char, state, MAX_DA_NAME_LEN )
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__array( char, event, MAX_DA_NAME_LEN )
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),
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TP_fast_assign(
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memcpy(__entry->state, state, MAX_DA_NAME_LEN);
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memcpy(__entry->event, event, MAX_DA_NAME_LEN);
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),
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TP_printk("event %s not expected in the state %s",
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__entry->event,
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__entry->state)
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);
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#ifdef CONFIG_RV_MON_WIP
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DEFINE_EVENT(event_da_monitor, event_wip,
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TP_PROTO(char *state, char *event, char *next_state, bool final_state),
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TP_ARGS(state, event, next_state, final_state));
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DEFINE_EVENT(error_da_monitor, error_wip,
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TP_PROTO(char *state, char *event),
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TP_ARGS(state, event));
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#endif /* CONFIG_RV_MON_WIP */
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#endif /* CONFIG_DA_MON_EVENTS_IMPLICIT */
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#ifdef CONFIG_DA_MON_EVENTS_ID
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DECLARE_EVENT_CLASS(event_da_monitor_id,
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TP_PROTO(int id, char *state, char *event, char *next_state, bool final_state),
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TP_ARGS(id, state, event, next_state, final_state),
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TP_STRUCT__entry(
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__field( int, id )
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__array( char, state, MAX_DA_NAME_LEN )
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__array( char, event, MAX_DA_NAME_LEN )
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__array( char, next_state, MAX_DA_NAME_LEN )
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__field( bool, final_state )
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),
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TP_fast_assign(
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memcpy(__entry->state, state, MAX_DA_NAME_LEN);
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memcpy(__entry->event, event, MAX_DA_NAME_LEN);
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memcpy(__entry->next_state, next_state, MAX_DA_NAME_LEN);
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__entry->id = id;
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__entry->final_state = final_state;
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),
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TP_printk("%d: %s x %s -> %s %s",
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__entry->id,
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__entry->state,
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__entry->event,
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__entry->next_state,
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__entry->final_state ? "(final)" : "")
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);
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DECLARE_EVENT_CLASS(error_da_monitor_id,
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TP_PROTO(int id, char *state, char *event),
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TP_ARGS(id, state, event),
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TP_STRUCT__entry(
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__field( int, id )
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__array( char, state, MAX_DA_NAME_LEN )
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__array( char, event, MAX_DA_NAME_LEN )
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),
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TP_fast_assign(
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memcpy(__entry->state, state, MAX_DA_NAME_LEN);
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memcpy(__entry->event, event, MAX_DA_NAME_LEN);
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__entry->id = id;
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),
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TP_printk("%d: event %s not expected in the state %s",
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__entry->id,
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__entry->event,
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__entry->state)
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);
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#ifdef CONFIG_RV_MON_WWNR
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/* id is the pid of the task */
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DEFINE_EVENT(event_da_monitor_id, event_wwnr,
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TP_PROTO(int id, char *state, char *event, char *next_state, bool final_state),
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TP_ARGS(id, state, event, next_state, final_state));
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DEFINE_EVENT(error_da_monitor_id, error_wwnr,
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TP_PROTO(int id, char *state, char *event),
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TP_ARGS(id, state, event));
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#endif /* CONFIG_RV_MON_WWNR */
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#endif /* CONFIG_DA_MON_EVENTS_ID */
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#endif /* _TRACE_RV_H */
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/* This part ust be outside protection */
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#undef TRACE_INCLUDE_PATH
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#include <trace/define_trace.h>
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