2 * Copyright 2015 Advanced Micro Devices, Inc.
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
12 * The above copyright notice and this permission notice (including the next
13 * paragraph) shall be included in all copies or substantial portions of the
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
25 /* The GPU load is measured as follows.
27 * There is a thread which samples the GRBM_STATUS register at a certain
28 * frequency and the "busy" or "idle" counter is incremented based on
29 * whether the GUI_ACTIVE bit is set or not.
31 * Then, the user can sample the counters twice and calculate the average
32 * GPU load between the two samples.
35 #include "radeonsi/si_pipe.h"
36 #include "radeonsi/si_query.h"
37 #include "util/os_time.h"
39 /* For good accuracy at 1000 fps or lower. This will be inaccurate for higher
40 * fps (there are too few samples per frame). */
41 #define SAMPLES_PER_SEC 10000
43 #define GRBM_STATUS 0x8010
44 #define TA_BUSY(x) (((x) >> 14) & 0x1)
45 #define GDS_BUSY(x) (((x) >> 15) & 0x1)
46 #define VGT_BUSY(x) (((x) >> 17) & 0x1)
47 #define IA_BUSY(x) (((x) >> 19) & 0x1)
48 #define SX_BUSY(x) (((x) >> 20) & 0x1)
49 #define WD_BUSY(x) (((x) >> 21) & 0x1)
50 #define SPI_BUSY(x) (((x) >> 22) & 0x1)
51 #define BCI_BUSY(x) (((x) >> 23) & 0x1)
52 #define SC_BUSY(x) (((x) >> 24) & 0x1)
53 #define PA_BUSY(x) (((x) >> 25) & 0x1)
54 #define DB_BUSY(x) (((x) >> 26) & 0x1)
55 #define CP_BUSY(x) (((x) >> 29) & 0x1)
56 #define CB_BUSY(x) (((x) >> 30) & 0x1)
57 #define GUI_ACTIVE(x) (((x) >> 31) & 0x1)
59 #define SRBM_STATUS2 0x0e4c
60 #define SDMA_BUSY(x) (((x) >> 5) & 0x1)
62 #define CP_STAT 0x8680
63 #define PFP_BUSY(x) (((x) >> 15) & 0x1)
64 #define MEQ_BUSY(x) (((x) >> 16) & 0x1)
65 #define ME_BUSY(x) (((x) >> 17) & 0x1)
66 #define SURFACE_SYNC_BUSY(x) (((x) >> 21) & 0x1)
67 #define DMA_BUSY(x) (((x) >> 22) & 0x1)
68 #define SCRATCH_RAM_BUSY(x) (((x) >> 24) & 0x1)
72 #define UPDATE_COUNTER(field, mask) \
75 p_atomic_inc(&counters->named.field.busy); \
77 p_atomic_inc(&counters->named.field.idle); \
80 static void si_update_mmio_counters(struct si_screen
*sscreen
,
81 union si_mmio_counters
*counters
)
84 bool gui_busy
, sdma_busy
= false;
87 sscreen
->ws
->read_registers(sscreen
->ws
, GRBM_STATUS
, 1, &value
);
89 UPDATE_COUNTER(ta
, TA_BUSY
);
90 UPDATE_COUNTER(gds
, GDS_BUSY
);
91 UPDATE_COUNTER(vgt
, VGT_BUSY
);
92 UPDATE_COUNTER(ia
, IA_BUSY
);
93 UPDATE_COUNTER(sx
, SX_BUSY
);
94 UPDATE_COUNTER(wd
, WD_BUSY
);
95 UPDATE_COUNTER(spi
, SPI_BUSY
);
96 UPDATE_COUNTER(bci
, BCI_BUSY
);
97 UPDATE_COUNTER(sc
, SC_BUSY
);
98 UPDATE_COUNTER(pa
, PA_BUSY
);
99 UPDATE_COUNTER(db
, DB_BUSY
);
100 UPDATE_COUNTER(cp
, CP_BUSY
);
101 UPDATE_COUNTER(cb
, CB_BUSY
);
102 UPDATE_COUNTER(gui
, GUI_ACTIVE
);
103 gui_busy
= GUI_ACTIVE(value
);
105 if (sscreen
->info
.chip_class
== CIK
|| sscreen
->info
.chip_class
== VI
) {
107 sscreen
->ws
->read_registers(sscreen
->ws
, SRBM_STATUS2
, 1, &value
);
109 UPDATE_COUNTER(sdma
, SDMA_BUSY
);
110 sdma_busy
= SDMA_BUSY(value
);
113 if (sscreen
->info
.chip_class
>= VI
) {
115 sscreen
->ws
->read_registers(sscreen
->ws
, CP_STAT
, 1, &value
);
117 UPDATE_COUNTER(pfp
, PFP_BUSY
);
118 UPDATE_COUNTER(meq
, MEQ_BUSY
);
119 UPDATE_COUNTER(me
, ME_BUSY
);
120 UPDATE_COUNTER(surf_sync
, SURFACE_SYNC_BUSY
);
121 UPDATE_COUNTER(cp_dma
, DMA_BUSY
);
122 UPDATE_COUNTER(scratch_ram
, SCRATCH_RAM_BUSY
);
125 value
= gui_busy
|| sdma_busy
;
126 UPDATE_COUNTER(gpu
, IDENTITY
);
129 #undef UPDATE_COUNTER
132 si_gpu_load_thread(void *param
)
134 struct si_screen
*sscreen
= (struct si_screen
*)param
;
135 const int period_us
= 1000000 / SAMPLES_PER_SEC
;
136 int sleep_us
= period_us
;
137 int64_t cur_time
, last_time
= os_time_get();
139 while (!p_atomic_read(&sscreen
->gpu_load_stop_thread
)) {
141 os_time_sleep(sleep_us
);
143 /* Make sure we sleep the ideal amount of time to match
144 * the expected frequency. */
145 cur_time
= os_time_get();
147 if (os_time_timeout(last_time
, last_time
+ period_us
,
149 sleep_us
= MAX2(sleep_us
- 1, 1);
153 /*printf("Hz: %.1f\n", 1000000.0 / (cur_time - last_time));*/
154 last_time
= cur_time
;
156 /* Update the counters. */
157 si_update_mmio_counters(sscreen
, &sscreen
->mmio_counters
);
159 p_atomic_dec(&sscreen
->gpu_load_stop_thread
);
163 void si_gpu_load_kill_thread(struct si_screen
*sscreen
)
165 if (!sscreen
->gpu_load_thread
)
168 p_atomic_inc(&sscreen
->gpu_load_stop_thread
);
169 thrd_join(sscreen
->gpu_load_thread
, NULL
);
170 sscreen
->gpu_load_thread
= 0;
173 static uint64_t si_read_mmio_counter(struct si_screen
*sscreen
,
176 /* Start the thread if needed. */
177 if (!sscreen
->gpu_load_thread
) {
178 mtx_lock(&sscreen
->gpu_load_mutex
);
179 /* Check again inside the mutex. */
180 if (!sscreen
->gpu_load_thread
)
181 sscreen
->gpu_load_thread
=
182 u_thread_create(si_gpu_load_thread
, sscreen
);
183 mtx_unlock(&sscreen
->gpu_load_mutex
);
186 unsigned busy
= p_atomic_read(&sscreen
->mmio_counters
.array
[busy_index
]);
187 unsigned idle
= p_atomic_read(&sscreen
->mmio_counters
.array
[busy_index
+ 1]);
189 return busy
| ((uint64_t)idle
<< 32);
192 static unsigned si_end_mmio_counter(struct si_screen
*sscreen
,
193 uint64_t begin
, unsigned busy_index
)
195 uint64_t end
= si_read_mmio_counter(sscreen
, busy_index
);
196 unsigned busy
= (end
& 0xffffffff) - (begin
& 0xffffffff);
197 unsigned idle
= (end
>> 32) - (begin
>> 32);
199 /* Calculate the % of time the busy counter was being incremented.
201 * If no counters were incremented, return the current counter status.
202 * It's for the case when the load is queried faster than
203 * the counters are updated.
206 return busy
*100 / (busy
+ idle
);
208 union si_mmio_counters counters
;
210 memset(&counters
, 0, sizeof(counters
));
211 si_update_mmio_counters(sscreen
, &counters
);
212 return counters
.array
[busy_index
] ? 100 : 0;
216 #define BUSY_INDEX(sscreen, field) (&sscreen->mmio_counters.named.field.busy - \
217 sscreen->mmio_counters.array)
219 static unsigned busy_index_from_type(struct si_screen
*sscreen
,
223 case SI_QUERY_GPU_LOAD
:
224 return BUSY_INDEX(sscreen
, gpu
);
225 case SI_QUERY_GPU_SHADERS_BUSY
:
226 return BUSY_INDEX(sscreen
, spi
);
227 case SI_QUERY_GPU_TA_BUSY
:
228 return BUSY_INDEX(sscreen
, ta
);
229 case SI_QUERY_GPU_GDS_BUSY
:
230 return BUSY_INDEX(sscreen
, gds
);
231 case SI_QUERY_GPU_VGT_BUSY
:
232 return BUSY_INDEX(sscreen
, vgt
);
233 case SI_QUERY_GPU_IA_BUSY
:
234 return BUSY_INDEX(sscreen
, ia
);
235 case SI_QUERY_GPU_SX_BUSY
:
236 return BUSY_INDEX(sscreen
, sx
);
237 case SI_QUERY_GPU_WD_BUSY
:
238 return BUSY_INDEX(sscreen
, wd
);
239 case SI_QUERY_GPU_BCI_BUSY
:
240 return BUSY_INDEX(sscreen
, bci
);
241 case SI_QUERY_GPU_SC_BUSY
:
242 return BUSY_INDEX(sscreen
, sc
);
243 case SI_QUERY_GPU_PA_BUSY
:
244 return BUSY_INDEX(sscreen
, pa
);
245 case SI_QUERY_GPU_DB_BUSY
:
246 return BUSY_INDEX(sscreen
, db
);
247 case SI_QUERY_GPU_CP_BUSY
:
248 return BUSY_INDEX(sscreen
, cp
);
249 case SI_QUERY_GPU_CB_BUSY
:
250 return BUSY_INDEX(sscreen
, cb
);
251 case SI_QUERY_GPU_SDMA_BUSY
:
252 return BUSY_INDEX(sscreen
, sdma
);
253 case SI_QUERY_GPU_PFP_BUSY
:
254 return BUSY_INDEX(sscreen
, pfp
);
255 case SI_QUERY_GPU_MEQ_BUSY
:
256 return BUSY_INDEX(sscreen
, meq
);
257 case SI_QUERY_GPU_ME_BUSY
:
258 return BUSY_INDEX(sscreen
, me
);
259 case SI_QUERY_GPU_SURF_SYNC_BUSY
:
260 return BUSY_INDEX(sscreen
, surf_sync
);
261 case SI_QUERY_GPU_CP_DMA_BUSY
:
262 return BUSY_INDEX(sscreen
, cp_dma
);
263 case SI_QUERY_GPU_SCRATCH_RAM_BUSY
:
264 return BUSY_INDEX(sscreen
, scratch_ram
);
266 unreachable("invalid query type");
270 uint64_t si_begin_counter(struct si_screen
*sscreen
, unsigned type
)
272 unsigned busy_index
= busy_index_from_type(sscreen
, type
);
273 return si_read_mmio_counter(sscreen
, busy_index
);
276 unsigned si_end_counter(struct si_screen
*sscreen
, unsigned type
,
279 unsigned busy_index
= busy_index_from_type(sscreen
, type
);
280 return si_end_mmio_counter(sscreen
, begin
, busy_index
);