| /* |
| * Copyright 2015 Advanced Micro Devices, Inc. |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the "Software"), |
| * to deal in the Software without restriction, including without limitation |
| * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| * and/or sell copies of the Software, and to permit persons to whom the |
| * Software is furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice (including the next |
| * paragraph) shall be included in all copies or substantial portions of the |
| * Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| * SOFTWARE. |
| * |
| * Authors: Marek Olšák <maraeo@gmail.com> |
| * |
| */ |
| |
| /* The GPU load is measured as follows. |
| * |
| * There is a thread which samples the GRBM_STATUS register at a certain |
| * frequency and the "busy" or "idle" counter is incremented based on |
| * whether the GUI_ACTIVE bit is set or not. |
| * |
| * Then, the user can sample the counters twice and calculate the average |
| * GPU load between the two samples. |
| */ |
| |
| #include "r600_pipe_common.h" |
| #include "os/os_time.h" |
| |
| /* For good accuracy at 1000 fps or lower. This will be inaccurate for higher |
| * fps (there are too few samples per frame). */ |
| #define SAMPLES_PER_SEC 10000 |
| |
| #define GRBM_STATUS 0x8010 |
| #define GUI_ACTIVE(x) (((x) >> 31) & 0x1) |
| |
| static void r600_update_grbm_counters(struct r600_common_screen *rscreen, |
| union r600_grbm_counters *counters) |
| { |
| uint32_t value = 0; |
| |
| rscreen->ws->read_registers(rscreen->ws, GRBM_STATUS, 1, &value); |
| |
| if (GUI_ACTIVE(value)) |
| p_atomic_inc(&counters->named.gui_busy); |
| else |
| p_atomic_inc(&counters->named.gui_idle); |
| } |
| |
| static PIPE_THREAD_ROUTINE(r600_gpu_load_thread, param) |
| { |
| struct r600_common_screen *rscreen = (struct r600_common_screen*)param; |
| const int period_us = 1000000 / SAMPLES_PER_SEC; |
| int sleep_us = period_us; |
| int64_t cur_time, last_time = os_time_get(); |
| |
| while (!p_atomic_read(&rscreen->gpu_load_stop_thread)) { |
| if (sleep_us) |
| os_time_sleep(sleep_us); |
| |
| /* Make sure we sleep the ideal amount of time to match |
| * the expected frequency. */ |
| cur_time = os_time_get(); |
| |
| if (os_time_timeout(last_time, last_time + period_us, |
| cur_time)) |
| sleep_us = MAX2(sleep_us - 1, 1); |
| else |
| sleep_us += 1; |
| |
| /*printf("Hz: %.1f\n", 1000000.0 / (cur_time - last_time));*/ |
| last_time = cur_time; |
| |
| /* Update the counters. */ |
| r600_update_grbm_counters(rscreen, &rscreen->grbm_counters); |
| } |
| p_atomic_dec(&rscreen->gpu_load_stop_thread); |
| return 0; |
| } |
| |
| void r600_gpu_load_kill_thread(struct r600_common_screen *rscreen) |
| { |
| if (!rscreen->gpu_load_thread) |
| return; |
| |
| p_atomic_inc(&rscreen->gpu_load_stop_thread); |
| pipe_thread_wait(rscreen->gpu_load_thread); |
| rscreen->gpu_load_thread = 0; |
| } |
| |
| static uint64_t r600_read_counter(struct r600_common_screen *rscreen, |
| unsigned busy_index) |
| { |
| /* Start the thread if needed. */ |
| if (!rscreen->gpu_load_thread) { |
| pipe_mutex_lock(rscreen->gpu_load_mutex); |
| /* Check again inside the mutex. */ |
| if (!rscreen->gpu_load_thread) |
| rscreen->gpu_load_thread = |
| pipe_thread_create(r600_gpu_load_thread, rscreen); |
| pipe_mutex_unlock(rscreen->gpu_load_mutex); |
| } |
| |
| unsigned busy = p_atomic_read(&rscreen->grbm_counters.array[busy_index]); |
| unsigned idle = p_atomic_read(&rscreen->grbm_counters.array[busy_index + 1]); |
| |
| return busy | ((uint64_t)idle << 32); |
| } |
| |
| static unsigned r600_end_counter(struct r600_common_screen *rscreen, |
| uint64_t begin, unsigned busy_index) |
| { |
| uint64_t end = r600_read_counter(rscreen, busy_index); |
| unsigned busy = (end & 0xffffffff) - (begin & 0xffffffff); |
| unsigned idle = (end >> 32) - (begin >> 32); |
| |
| /* Calculate the % of time the busy counter was being incremented. |
| * |
| * If no counters were incremented, return the current counter status. |
| * It's for the case when the load is queried faster than |
| * the counters are updated. |
| */ |
| if (idle || busy) { |
| return busy*100 / (busy + idle); |
| } else { |
| union r600_grbm_counters counters; |
| |
| memset(&counters, 0, sizeof(counters)); |
| r600_update_grbm_counters(rscreen, &counters); |
| return counters.array[busy_index] ? 100 : 0; |
| } |
| } |
| |
| #define BUSY_INDEX(rscreen, field) (&rscreen->grbm_counters.named.field##_busy - \ |
| rscreen->grbm_counters.array) |
| |
| uint64_t r600_begin_counter_gui(struct r600_common_screen *rscreen) |
| { |
| return r600_read_counter(rscreen, BUSY_INDEX(rscreen, gui)); |
| } |
| |
| unsigned r600_end_counter_gui(struct r600_common_screen *rscreen, uint64_t begin) |
| { |
| return r600_end_counter(rscreen, begin, BUSY_INDEX(rscreen, gui)); |
| } |