1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
|
// SPDX-License-Identifier: GPL-2.0
#include <linux/ftrace.h>
#include <linux/tracepoint.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/rv.h>
#include <rv/instrumentation.h>
#include <rv/da_monitor.h>
#define MODULE_NAME "sncid"
#include <trace/events/sched.h>
#include <trace/events/preemptirq.h>
#include <rv_trace.h>
#include <monitors/sched/sched.h>
#include "sncid.h"
static struct rv_monitor rv_sncid;
DECLARE_DA_MON_PER_CPU(sncid, unsigned char);
static void handle_irq_disable(void *data, unsigned long ip, unsigned long parent_ip)
{
da_handle_event_sncid(irq_disable_sncid);
}
static void handle_irq_enable(void *data, unsigned long ip, unsigned long parent_ip)
{
da_handle_start_event_sncid(irq_enable_sncid);
}
static void handle_schedule_entry(void *data, bool preempt, unsigned long ip)
{
da_handle_start_event_sncid(schedule_entry_sncid);
}
static void handle_schedule_exit(void *data, bool is_switch, unsigned long ip)
{
da_handle_start_event_sncid(schedule_exit_sncid);
}
static int enable_sncid(void)
{
int retval;
retval = da_monitor_init_sncid();
if (retval)
return retval;
rv_attach_trace_probe("sncid", irq_disable, handle_irq_disable);
rv_attach_trace_probe("sncid", irq_enable, handle_irq_enable);
rv_attach_trace_probe("sncid", sched_entry_tp, handle_schedule_entry);
rv_attach_trace_probe("sncid", sched_exit_tp, handle_schedule_exit);
return 0;
}
static void disable_sncid(void)
{
rv_sncid.enabled = 0;
rv_detach_trace_probe("sncid", irq_disable, handle_irq_disable);
rv_detach_trace_probe("sncid", irq_enable, handle_irq_enable);
rv_detach_trace_probe("sncid", sched_entry_tp, handle_schedule_entry);
rv_detach_trace_probe("sncid", sched_exit_tp, handle_schedule_exit);
da_monitor_destroy_sncid();
}
static struct rv_monitor rv_sncid = {
.name = "sncid",
.description = "schedule not called with interrupt disabled.",
.enable = enable_sncid,
.disable = disable_sncid,
.reset = da_monitor_reset_all_sncid,
.enabled = 0,
};
static int __init register_sncid(void)
{
rv_register_monitor(&rv_sncid, &rv_sched);
return 0;
}
static void __exit unregister_sncid(void)
{
rv_unregister_monitor(&rv_sncid);
}
module_init(register_sncid);
module_exit(unregister_sncid);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Gabriele Monaco <gmonaco@redhat.com>");
MODULE_DESCRIPTION("sncid: schedule not called with interrupt disabled.");
|
