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
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
|
/* $OpenBSD: dt_prov_profile.c,v 1.3 2020/06/26 13:11:23 mpi Exp $ */
/*
* Copyright (c) 2019 Martin Pieuchot <mpi@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <sys/systm.h>
#include <sys/param.h>
#include <sys/atomic.h>
#include <dev/dt/dtvar.h>
struct dt_probe *dtpp_profile; /* per-CPU profile probe */
struct dt_probe *dtpp_interval; /* global periodic probe */
/* Flags that make sense for this provider */
#define DTEVT_PROV_PROFILE DTEVT_KSTACK
int dt_prov_profile_alloc(struct dt_probe *, struct dt_softc *,
struct dt_pcb_list *, struct dtioc_req *);
void dt_prov_profile_enter(struct dt_provider *, ...);
void dt_prov_interval_enter(struct dt_provider *, ...);
struct dt_provider dt_prov_profile = {
.dtpv_name = "profile",
.dtpv_alloc = dt_prov_profile_alloc,
.dtpv_enter = dt_prov_profile_enter,
.dtpv_leave = NULL,
};
struct dt_provider dt_prov_interval = {
.dtpv_name = "interval",
.dtpv_alloc = dt_prov_profile_alloc,
.dtpv_enter = dt_prov_interval_enter,
.dtpv_leave = NULL,
};
int
dt_prov_profile_init(void)
{
dtpp_profile = dt_dev_alloc_probe("hz", "97", &dt_prov_profile);
dt_dev_register_probe(dtpp_profile);
if (dtpp_profile == NULL)
return 0;
dtpp_interval = dt_dev_alloc_probe("hz", "1", &dt_prov_interval);
dt_dev_register_probe(dtpp_interval);
if (dtpp_interval == NULL)
return 1;
return 2;
}
int
dt_prov_profile_alloc(struct dt_probe *dtp, struct dt_softc *sc,
struct dt_pcb_list *plist, struct dtioc_req *dtrq)
{
struct dt_pcb *dp;
struct cpu_info *ci;
CPU_INFO_ITERATOR cii;
extern int hz;
KASSERT(dtioc_req_isvalid(dtrq));
KASSERT(TAILQ_EMPTY(plist));
KASSERT(dtp == dtpp_profile || dtp == dtpp_interval);
if (dtrq->dtrq_rate <= 0 || dtrq->dtrq_rate > hz)
return EOPNOTSUPP;
CPU_INFO_FOREACH(cii, ci) {
if (!CPU_IS_PRIMARY(ci) && (dtp == dtpp_interval))
continue;
dp = dt_pcb_alloc(dtp, sc);
if (dp == NULL) {
dt_pcb_purge(plist);
return ENOMEM;
}
dp->dp_maxtick = hz / dtrq->dtrq_rate;
dp->dp_cpuid = ci->ci_cpuid;
dp->dp_filter = dtrq->dtrq_filter;
dp->dp_evtflags = dtrq->dtrq_evtflags & DTEVT_PROV_PROFILE;
TAILQ_INSERT_HEAD(plist, dp, dp_snext);
}
return 0;
}
static inline void
dt_prov_profile_fire(struct dt_pcb *dp)
{
struct dt_evt *dtev;
if (++dp->dp_nticks < dp->dp_maxtick)
return;
dtev = dt_pcb_ring_get(dp, 1);
if (dtev == NULL)
return;
dt_pcb_ring_consume(dp, dtev);
dp->dp_nticks = 0;
}
void
dt_prov_profile_enter(struct dt_provider *dtpv, ...)
{
struct cpu_info *ci = curcpu();
struct dt_pcb *dp;
KASSERT(dtpv == &dt_prov_profile);
smr_read_enter();
SMR_SLIST_FOREACH(dp, &dtpp_profile->dtp_pcbs, dp_pnext) {
if (dp->dp_cpuid != ci->ci_cpuid)
continue;
dt_prov_profile_fire(dp);
}
smr_read_leave();
}
void
dt_prov_interval_enter(struct dt_provider *dtpv, ...)
{
struct dt_pcb *dp;
KASSERT(dtpv == &dt_prov_interval);
smr_read_enter();
SMR_SLIST_FOREACH(dp, &dtpp_interval->dtp_pcbs, dp_pnext) {
dt_prov_profile_fire(dp);
}
smr_read_leave();
}
|
