FreeBSD/Linux Kernel Cross Reference
sys/mips/rmi/perfmon.h
1 /*-
2 * Copyright (c) 2003-2009 RMI Corporation
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of RMI Corporation, nor the names of its contributors,
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * RMI_BSD */
30
31 #ifndef PERFMON_H
32 #define PERFMON_H
33
34 #include <mips/rmi/perfmon_xlrconfig.h>
35
36 /*
37 * category events reported by the perfmon library
38 */
39 enum event_category_t {
40 PERF_CP0_COUNTER = 1, PERF_CP2_CREDITS, PERF_L2_COUNTER,
41 PERF_SBC_COUNTER, PERF_SBC_CREDITS, PERF_GMAC0_COUNTER, PERF_GMAC1_COUNTER,
42 PERF_GMAC2_COUNTER, PERF_GMAC_STAT_COM, PERF_GMAC_STAT_TX,
43 PERF_GMAC_STAT_RX, PERF_DRAM_COUNTER, PERF_PARAMETER_CONF = 127};
44
45
46 enum perf_param_t {
47 PERF_CPU_SAMPLING_INTERVAL, PERF_SYS_SAMPLING_INTERVAL, PERF_CC_SAMPLE_RATE, PERF_CP0_FLAGS
48 };
49
50 #define CPO_EVENTS_TEMPLATE 0x06 /* enable kernel and user events */
51
52 #define PERFMON_ACTIVE_MAGIC 0xc001
53 #define PERFMON_ENABLED_MAGIC 0xb007
54 #define PERFMON_INITIAL_GENERATION 0x0101
55
56 #define PERFMON_SERVER_PORT 7007
57
58 enum system_bridge_credits_t {
59 PCIX_CREDITS, HT_CREDITS, GIO_CREDITS, OTHER_CREDITS
60 };
61
62 struct perf_config_data {
63 uint16_t magic; /* monitor start when this is initialized */
64 uint16_t generation; /* incremented when the config changes */
65 uint16_t flags;
66 uint16_t cc_sample_rate;/* rate at which credit counters are sampled
67 * relative to sampling_rate */
68 uint32_t sampling_rate; /* rate at which events are sampled */
69 uint32_t cc_register_mask; /* credit counters registers to be
70 * sampled */
71 uint64_t events[NTHREADS]; /* events bitmap for each thread */
72 };
73
74 struct perf_sample {
75 uint32_t counter;
76 uint32_t timestamp;
77 uint32_t sample_tag;
78 uint32_t duration;
79 };
80
81 struct sample_q {
82 int32_t head, tail;
83 struct perf_sample samples[PERF_SAMPLE_BUFSZ];
84 uint32_t overflows;
85 };
86
87 struct perf_area {
88 struct perf_config_data perf_config;
89 struct sample_q sample_fifo;
90 };
91
92 /*
93 * We have a shared location to keep a global tick counter for all the
94 * CPUS - TODO is this optimal? effect on cache?
95 */
96 extern uint32_t *xlr_perfmon_timer_loc;
97
98 #define PERFMON_TIMESTAMP_LOC (xlr_perfmon_timer_loc)
99
100 static __inline__ uint32_t
101 perfmon_timestamp_get(void)
102 {
103 return *PERFMON_TIMESTAMP_LOC;
104 }
105
106 static __inline__ void
107 perfmon_timestamp_set(uint32_t val)
108 {
109 *PERFMON_TIMESTAMP_LOC = val;
110 }
111
112 static __inline__ void
113 perfmon_timestamp_incr(int val)
114 {
115 (*PERFMON_TIMESTAMP_LOC) += val;
116 }
117
118 static __inline__ void
119 send_sample_gts(uint32_t tag, uint32_t value, uint32_t td)
120 {
121 xlr_send_sample(tag, value, perfmon_timestamp_get(), td);
122 }
123
124 /*
125 * Simple FIFO, one producer - one consumer - circlar queue - no locking
126 */
127
128 static __inline__ void
129 init_fifo(struct sample_q *q)
130 {
131 q->head = q->tail = 0;
132 }
133
134 static __inline__ void
135 put_sample(struct sample_q *q, uint32_t sample_tag, uint32_t counter,
136 uint32_t duration)
137 {
138 uint32_t timestamp = perfmon_timestamp_get();
139 int new_tail = (q->tail + 1) % PERF_SAMPLE_BUFSZ;
140
141 if (q->head == new_tail) {
142 q->overflows++;
143 return;
144 }
145 q->samples[new_tail].sample_tag = sample_tag;
146 q->samples[new_tail].counter = counter;
147 q->samples[new_tail].timestamp = timestamp;
148 q->samples[new_tail].duration = duration;
149
150 q->tail = new_tail;
151 }
152
153 static __inline__ int
154 get_sample(struct sample_q *q, uint32_t * sample_tag, uint32_t * counter,
155 uint32_t * timestamp, uint32_t * duration)
156 {
157 int head = q->head;
158
159 if (head == q->tail)
160 return 0;
161 *sample_tag = q->samples[head].sample_tag;
162 *counter = q->samples[head].counter;
163 *timestamp = q->samples[head].timestamp;
164 *duration = q->samples[head].duration;
165
166 q->head = (head + 1) % PERF_SAMPLE_BUFSZ;
167 return 1;
168 }
169
170 static __inline__ void
171 clear_queue(struct sample_q *q)
172 {
173 q->head = q->tail;
174 }
175 void xlr_perfmon_init_cpu(void *);
176 void xlr_perfmon_sampler(void *);
177 void log_active_core(int core);
178 int get_start_generation(void);
179
180 void xlr_perfmon_clockhandler(void);
181 extern int xlr_perfmon_started;
182
183 #endif /* PERFMON_H */
Cache object: 8cd8533b84e9fbd1757528961fac068c
|