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cb85c660fc
Monitors describing complex systems, such as the scheduler, can easily grow to the point where they are just hard to understand because of the many possible state transitions. Often it is possible to break such descriptions into smaller monitors, sharing some or all events. Enabling those smaller monitors concurrently is, in fact, testing the system as if we had one single larger monitor. Splitting models into multiple specification is not only easier to understand, but gives some more clues when we see errors. Add the possibility to create container monitors, whose only purpose is to host other nested monitors. Enabling a container monitor enables all nested ones, but it's still possible to enable nested monitors independently. Add the sched monitor as first container, for now empty. Cc: Ingo Molnar <mingo@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Juri Lelli <juri.lelli@redhat.com> Link: https://lore.kernel.org/20250305140406.350227-3-gmonaco@redhat.com Signed-off-by: Gabriele Monaco <gmonaco@redhat.com> Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
73 lines
1.7 KiB
C
73 lines
1.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#include <linux/mutex.h>
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struct rv_interface {
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struct dentry *root_dir;
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struct dentry *monitors_dir;
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};
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#include "../trace.h"
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#include <linux/tracefs.h>
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#include <linux/rv.h>
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#define RV_MODE_WRITE TRACE_MODE_WRITE
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#define RV_MODE_READ TRACE_MODE_READ
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#define rv_create_dir tracefs_create_dir
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#define rv_create_file tracefs_create_file
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#define rv_remove tracefs_remove
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#define MAX_RV_MONITOR_NAME_SIZE 32
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#define MAX_RV_REACTOR_NAME_SIZE 32
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extern struct mutex rv_interface_lock;
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extern struct list_head rv_monitors_list;
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#ifdef CONFIG_RV_REACTORS
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struct rv_reactor_def {
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struct list_head list;
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struct rv_reactor *reactor;
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/* protected by the monitor interface lock */
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int counter;
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};
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#endif
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struct rv_monitor_def {
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struct list_head list;
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struct rv_monitor *monitor;
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struct rv_monitor *parent;
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struct dentry *root_d;
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#ifdef CONFIG_RV_REACTORS
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struct rv_reactor_def *rdef;
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bool reacting;
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#endif
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bool task_monitor;
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};
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struct dentry *get_monitors_root(void);
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int rv_disable_monitor(struct rv_monitor_def *mdef);
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int rv_enable_monitor(struct rv_monitor_def *mdef);
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bool rv_is_container_monitor(struct rv_monitor_def *mdef);
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bool rv_is_nested_monitor(struct rv_monitor_def *mdef);
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#ifdef CONFIG_RV_REACTORS
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int reactor_populate_monitor(struct rv_monitor_def *mdef);
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void reactor_cleanup_monitor(struct rv_monitor_def *mdef);
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int init_rv_reactors(struct dentry *root_dir);
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#else
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static inline int reactor_populate_monitor(struct rv_monitor_def *mdef)
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{
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return 0;
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}
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static inline void reactor_cleanup_monitor(struct rv_monitor_def *mdef)
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{
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return;
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}
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static inline int init_rv_reactors(struct dentry *root_dir)
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{
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return 0;
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}
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#endif
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