2 * Copyright 2015 Advanced Micro Devices, Inc.
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
23 * Authors: Marek Olšák <maraeo@gmail.com>
27 /* The GPU load is measured as follows.
29 * There is a thread which samples the GRBM_STATUS register at a certain
30 * frequency and the "busy" or "idle" counter is incremented based on
31 * whether the GUI_ACTIVE bit is set or not.
33 * Then, the user can sample the counters twice and calculate the average
34 * GPU load between the two samples.
37 #include "r600_pipe_common.h"
38 #include "r600_query.h"
39 #include "util/os_time.h"
41 /* For good accuracy at 1000 fps or lower. This will be inaccurate for higher
42 * fps (there are too few samples per frame). */
43 #define SAMPLES_PER_SEC 10000
45 #define GRBM_STATUS 0x8010
46 #define TA_BUSY(x) (((x) >> 14) & 0x1)
47 #define GDS_BUSY(x) (((x) >> 15) & 0x1)
48 #define VGT_BUSY(x) (((x) >> 17) & 0x1)
49 #define IA_BUSY(x) (((x) >> 19) & 0x1)
50 #define SX_BUSY(x) (((x) >> 20) & 0x1)
51 #define WD_BUSY(x) (((x) >> 21) & 0x1)
52 #define SPI_BUSY(x) (((x) >> 22) & 0x1)
53 #define BCI_BUSY(x) (((x) >> 23) & 0x1)
54 #define SC_BUSY(x) (((x) >> 24) & 0x1)
55 #define PA_BUSY(x) (((x) >> 25) & 0x1)
56 #define DB_BUSY(x) (((x) >> 26) & 0x1)
57 #define CP_BUSY(x) (((x) >> 29) & 0x1)
58 #define CB_BUSY(x) (((x) >> 30) & 0x1)
59 #define GUI_ACTIVE(x) (((x) >> 31) & 0x1)
61 #define SRBM_STATUS2 0x0e4c
62 #define SDMA_BUSY(x) (((x) >> 5) & 0x1)
64 #define CP_STAT 0x8680
65 #define PFP_BUSY(x) (((x) >> 15) & 0x1)
66 #define MEQ_BUSY(x) (((x) >> 16) & 0x1)
67 #define ME_BUSY(x) (((x) >> 17) & 0x1)
68 #define SURFACE_SYNC_BUSY(x) (((x) >> 21) & 0x1)
69 #define DMA_BUSY(x) (((x) >> 22) & 0x1)
70 #define SCRATCH_RAM_BUSY(x) (((x) >> 24) & 0x1)
74 #define UPDATE_COUNTER(field, mask) \
77 p_atomic_inc(&counters->named.field.busy); \
79 p_atomic_inc(&counters->named.field.idle); \
82 static void r600_update_mmio_counters(struct r600_common_screen
*rscreen
,
83 union r600_mmio_counters
*counters
)
86 bool gui_busy
, sdma_busy
= false;
89 rscreen
->ws
->read_registers(rscreen
->ws
, GRBM_STATUS
, 1, &value
);
91 UPDATE_COUNTER(ta
, TA_BUSY
);
92 UPDATE_COUNTER(gds
, GDS_BUSY
);
93 UPDATE_COUNTER(vgt
, VGT_BUSY
);
94 UPDATE_COUNTER(ia
, IA_BUSY
);
95 UPDATE_COUNTER(sx
, SX_BUSY
);
96 UPDATE_COUNTER(wd
, WD_BUSY
);
97 UPDATE_COUNTER(spi
, SPI_BUSY
);
98 UPDATE_COUNTER(bci
, BCI_BUSY
);
99 UPDATE_COUNTER(sc
, SC_BUSY
);
100 UPDATE_COUNTER(pa
, PA_BUSY
);
101 UPDATE_COUNTER(db
, DB_BUSY
);
102 UPDATE_COUNTER(cp
, CP_BUSY
);
103 UPDATE_COUNTER(cb
, CB_BUSY
);
104 UPDATE_COUNTER(gui
, GUI_ACTIVE
);
105 gui_busy
= GUI_ACTIVE(value
);
107 value
= gui_busy
|| sdma_busy
;
108 UPDATE_COUNTER(gpu
, IDENTITY
);
111 #undef UPDATE_COUNTER
114 r600_gpu_load_thread(void *param
)
116 struct r600_common_screen
*rscreen
= (struct r600_common_screen
*)param
;
117 const int period_us
= 1000000 / SAMPLES_PER_SEC
;
118 int sleep_us
= period_us
;
119 int64_t cur_time
, last_time
= os_time_get();
121 while (!p_atomic_read(&rscreen
->gpu_load_stop_thread
)) {
123 os_time_sleep(sleep_us
);
125 /* Make sure we sleep the ideal amount of time to match
126 * the expected frequency. */
127 cur_time
= os_time_get();
129 if (os_time_timeout(last_time
, last_time
+ period_us
,
131 sleep_us
= MAX2(sleep_us
- 1, 1);
135 /*printf("Hz: %.1f\n", 1000000.0 / (cur_time - last_time));*/
136 last_time
= cur_time
;
138 /* Update the counters. */
139 r600_update_mmio_counters(rscreen
, &rscreen
->mmio_counters
);
141 p_atomic_dec(&rscreen
->gpu_load_stop_thread
);
145 void r600_gpu_load_kill_thread(struct r600_common_screen
*rscreen
)
147 if (!rscreen
->gpu_load_thread
)
150 p_atomic_inc(&rscreen
->gpu_load_stop_thread
);
151 thrd_join(rscreen
->gpu_load_thread
, NULL
);
152 rscreen
->gpu_load_thread
= 0;
155 static uint64_t r600_read_mmio_counter(struct r600_common_screen
*rscreen
,
158 /* Start the thread if needed. */
159 if (!rscreen
->gpu_load_thread
) {
160 mtx_lock(&rscreen
->gpu_load_mutex
);
161 /* Check again inside the mutex. */
162 if (!rscreen
->gpu_load_thread
)
163 rscreen
->gpu_load_thread
=
164 u_thread_create(r600_gpu_load_thread
, rscreen
);
165 mtx_unlock(&rscreen
->gpu_load_mutex
);
168 unsigned busy
= p_atomic_read(&rscreen
->mmio_counters
.array
[busy_index
]);
169 unsigned idle
= p_atomic_read(&rscreen
->mmio_counters
.array
[busy_index
+ 1]);
171 return busy
| ((uint64_t)idle
<< 32);
174 static unsigned r600_end_mmio_counter(struct r600_common_screen
*rscreen
,
175 uint64_t begin
, unsigned busy_index
)
177 uint64_t end
= r600_read_mmio_counter(rscreen
, busy_index
);
178 unsigned busy
= (end
& 0xffffffff) - (begin
& 0xffffffff);
179 unsigned idle
= (end
>> 32) - (begin
>> 32);
181 /* Calculate the % of time the busy counter was being incremented.
183 * If no counters were incremented, return the current counter status.
184 * It's for the case when the load is queried faster than
185 * the counters are updated.
188 return busy
*100 / (busy
+ idle
);
190 union r600_mmio_counters counters
;
192 memset(&counters
, 0, sizeof(counters
));
193 r600_update_mmio_counters(rscreen
, &counters
);
194 return counters
.array
[busy_index
] ? 100 : 0;
198 #define BUSY_INDEX(rscreen, field) (&rscreen->mmio_counters.named.field.busy - \
199 rscreen->mmio_counters.array)
201 static unsigned busy_index_from_type(struct r600_common_screen
*rscreen
,
205 case R600_QUERY_GPU_LOAD
:
206 return BUSY_INDEX(rscreen
, gpu
);
207 case R600_QUERY_GPU_SHADERS_BUSY
:
208 return BUSY_INDEX(rscreen
, spi
);
209 case R600_QUERY_GPU_TA_BUSY
:
210 return BUSY_INDEX(rscreen
, ta
);
211 case R600_QUERY_GPU_GDS_BUSY
:
212 return BUSY_INDEX(rscreen
, gds
);
213 case R600_QUERY_GPU_VGT_BUSY
:
214 return BUSY_INDEX(rscreen
, vgt
);
215 case R600_QUERY_GPU_IA_BUSY
:
216 return BUSY_INDEX(rscreen
, ia
);
217 case R600_QUERY_GPU_SX_BUSY
:
218 return BUSY_INDEX(rscreen
, sx
);
219 case R600_QUERY_GPU_WD_BUSY
:
220 return BUSY_INDEX(rscreen
, wd
);
221 case R600_QUERY_GPU_BCI_BUSY
:
222 return BUSY_INDEX(rscreen
, bci
);
223 case R600_QUERY_GPU_SC_BUSY
:
224 return BUSY_INDEX(rscreen
, sc
);
225 case R600_QUERY_GPU_PA_BUSY
:
226 return BUSY_INDEX(rscreen
, pa
);
227 case R600_QUERY_GPU_DB_BUSY
:
228 return BUSY_INDEX(rscreen
, db
);
229 case R600_QUERY_GPU_CP_BUSY
:
230 return BUSY_INDEX(rscreen
, cp
);
231 case R600_QUERY_GPU_CB_BUSY
:
232 return BUSY_INDEX(rscreen
, cb
);
233 case R600_QUERY_GPU_SDMA_BUSY
:
234 return BUSY_INDEX(rscreen
, sdma
);
235 case R600_QUERY_GPU_PFP_BUSY
:
236 return BUSY_INDEX(rscreen
, pfp
);
237 case R600_QUERY_GPU_MEQ_BUSY
:
238 return BUSY_INDEX(rscreen
, meq
);
239 case R600_QUERY_GPU_ME_BUSY
:
240 return BUSY_INDEX(rscreen
, me
);
241 case R600_QUERY_GPU_SURF_SYNC_BUSY
:
242 return BUSY_INDEX(rscreen
, surf_sync
);
243 case R600_QUERY_GPU_CP_DMA_BUSY
:
244 return BUSY_INDEX(rscreen
, cp_dma
);
245 case R600_QUERY_GPU_SCRATCH_RAM_BUSY
:
246 return BUSY_INDEX(rscreen
, scratch_ram
);
248 unreachable("invalid query type");
252 uint64_t r600_begin_counter(struct r600_common_screen
*rscreen
, unsigned type
)
254 unsigned busy_index
= busy_index_from_type(rscreen
, type
);
255 return r600_read_mmio_counter(rscreen
, busy_index
);
258 unsigned r600_end_counter(struct r600_common_screen
*rscreen
, unsigned type
,
261 unsigned busy_index
= busy_index_from_type(rscreen
, type
);
262 return r600_end_mmio_counter(rscreen
, begin
, busy_index
);