diff options
Diffstat (limited to 'src/gallium/drivers/r600/r600_gpu_load.c')
| -rw-r--r-- | src/gallium/drivers/r600/r600_gpu_load.c | 283 |
1 files changed, 283 insertions, 0 deletions
diff --git a/src/gallium/drivers/r600/r600_gpu_load.c b/src/gallium/drivers/r600/r600_gpu_load.c new file mode 100644 index 0000000000..d35be4f327 --- /dev/null +++ b/src/gallium/drivers/r600/r600_gpu_load.c @@ -0,0 +1,283 @@ +/* + * 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 "r600_query.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 TA_BUSY(x) (((x) >> 14) & 0x1) +#define GDS_BUSY(x) (((x) >> 15) & 0x1) +#define VGT_BUSY(x) (((x) >> 17) & 0x1) +#define IA_BUSY(x) (((x) >> 19) & 0x1) +#define SX_BUSY(x) (((x) >> 20) & 0x1) +#define WD_BUSY(x) (((x) >> 21) & 0x1) +#define SPI_BUSY(x) (((x) >> 22) & 0x1) +#define BCI_BUSY(x) (((x) >> 23) & 0x1) +#define SC_BUSY(x) (((x) >> 24) & 0x1) +#define PA_BUSY(x) (((x) >> 25) & 0x1) +#define DB_BUSY(x) (((x) >> 26) & 0x1) +#define CP_BUSY(x) (((x) >> 29) & 0x1) +#define CB_BUSY(x) (((x) >> 30) & 0x1) +#define GUI_ACTIVE(x) (((x) >> 31) & 0x1) + +#define SRBM_STATUS2 0x0e4c +#define SDMA_BUSY(x) (((x) >> 5) & 0x1) + +#define CP_STAT 0x8680 +#define PFP_BUSY(x) (((x) >> 15) & 0x1) +#define MEQ_BUSY(x) (((x) >> 16) & 0x1) +#define ME_BUSY(x) (((x) >> 17) & 0x1) +#define SURFACE_SYNC_BUSY(x) (((x) >> 21) & 0x1) +#define DMA_BUSY(x) (((x) >> 22) & 0x1) +#define SCRATCH_RAM_BUSY(x) (((x) >> 24) & 0x1) + +#define IDENTITY(x) x + +#define UPDATE_COUNTER(field, mask) \ + do { \ + if (mask(value)) \ + p_atomic_inc(&counters->named.field.busy); \ + else \ + p_atomic_inc(&counters->named.field.idle); \ + } while (0) + +static void r600_update_mmio_counters(struct r600_common_screen *rscreen, + union r600_mmio_counters *counters) +{ + uint32_t value = 0; + bool gui_busy, sdma_busy = false; + + /* GRBM_STATUS */ + rscreen->ws->read_registers(rscreen->ws, GRBM_STATUS, 1, &value); + + UPDATE_COUNTER(ta, TA_BUSY); + UPDATE_COUNTER(gds, GDS_BUSY); + UPDATE_COUNTER(vgt, VGT_BUSY); + UPDATE_COUNTER(ia, IA_BUSY); + UPDATE_COUNTER(sx, SX_BUSY); + UPDATE_COUNTER(wd, WD_BUSY); + UPDATE_COUNTER(spi, SPI_BUSY); + UPDATE_COUNTER(bci, BCI_BUSY); + UPDATE_COUNTER(sc, SC_BUSY); + UPDATE_COUNTER(pa, PA_BUSY); + UPDATE_COUNTER(db, DB_BUSY); + UPDATE_COUNTER(cp, CP_BUSY); + UPDATE_COUNTER(cb, CB_BUSY); + UPDATE_COUNTER(gui, GUI_ACTIVE); + gui_busy = GUI_ACTIVE(value); + + if (rscreen->chip_class == CIK || rscreen->chip_class == VI) { + /* SRBM_STATUS2 */ + rscreen->ws->read_registers(rscreen->ws, SRBM_STATUS2, 1, &value); + + UPDATE_COUNTER(sdma, SDMA_BUSY); + sdma_busy = SDMA_BUSY(value); + } + + if (rscreen->chip_class >= VI) { + /* CP_STAT */ + rscreen->ws->read_registers(rscreen->ws, CP_STAT, 1, &value); + + UPDATE_COUNTER(pfp, PFP_BUSY); + UPDATE_COUNTER(meq, MEQ_BUSY); + UPDATE_COUNTER(me, ME_BUSY); + UPDATE_COUNTER(surf_sync, SURFACE_SYNC_BUSY); + UPDATE_COUNTER(cp_dma, DMA_BUSY); + UPDATE_COUNTER(scratch_ram, SCRATCH_RAM_BUSY); + } + + value = gui_busy || sdma_busy; + UPDATE_COUNTER(gpu, IDENTITY); +} + +#undef UPDATE_COUNTER + +static int +r600_gpu_load_thread(void *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_mmio_counters(rscreen, &rscreen->mmio_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); + thrd_join(rscreen->gpu_load_thread, NULL); + rscreen->gpu_load_thread = 0; +} + +static uint64_t r600_read_mmio_counter(struct r600_common_screen *rscreen, + unsigned busy_index) +{ + /* Start the thread if needed. */ + if (!rscreen->gpu_load_thread) { + mtx_lock(&rscreen->gpu_load_mutex); + /* Check again inside the mutex. */ + if (!rscreen->gpu_load_thread) + rscreen->gpu_load_thread = + u_thread_create(r600_gpu_load_thread, rscreen); + mtx_unlock(&rscreen->gpu_load_mutex); + } + + unsigned busy = p_atomic_read(&rscreen->mmio_counters.array[busy_index]); + unsigned idle = p_atomic_read(&rscreen->mmio_counters.array[busy_index + 1]); + + return busy | ((uint64_t)idle << 32); +} + +static unsigned r600_end_mmio_counter(struct r600_common_screen *rscreen, + uint64_t begin, unsigned busy_index) +{ + uint64_t end = r600_read_mmio_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_mmio_counters counters; + + memset(&counters, 0, sizeof(counters)); + r600_update_mmio_counters(rscreen, &counters); + return counters.array[busy_index] ? 100 : 0; + } +} + +#define BUSY_INDEX(rscreen, field) (&rscreen->mmio_counters.named.field.busy - \ + rscreen->mmio_counters.array) + +static unsigned busy_index_from_type(struct r600_common_screen *rscreen, + unsigned type) +{ + switch (type) { + case R600_QUERY_GPU_LOAD: + return BUSY_INDEX(rscreen, gpu); + case R600_QUERY_GPU_SHADERS_BUSY: + return BUSY_INDEX(rscreen, spi); + case R600_QUERY_GPU_TA_BUSY: + return BUSY_INDEX(rscreen, ta); + case R600_QUERY_GPU_GDS_BUSY: + return BUSY_INDEX(rscreen, gds); + case R600_QUERY_GPU_VGT_BUSY: + return BUSY_INDEX(rscreen, vgt); + case R600_QUERY_GPU_IA_BUSY: + return BUSY_INDEX(rscreen, ia); + case R600_QUERY_GPU_SX_BUSY: + return BUSY_INDEX(rscreen, sx); + case R600_QUERY_GPU_WD_BUSY: + return BUSY_INDEX(rscreen, wd); + case R600_QUERY_GPU_BCI_BUSY: + return BUSY_INDEX(rscreen, bci); + case R600_QUERY_GPU_SC_BUSY: + return BUSY_INDEX(rscreen, sc); + case R600_QUERY_GPU_PA_BUSY: + return BUSY_INDEX(rscreen, pa); + case R600_QUERY_GPU_DB_BUSY: + return BUSY_INDEX(rscreen, db); + case R600_QUERY_GPU_CP_BUSY: + return BUSY_INDEX(rscreen, cp); + case R600_QUERY_GPU_CB_BUSY: + return BUSY_INDEX(rscreen, cb); + case R600_QUERY_GPU_SDMA_BUSY: + return BUSY_INDEX(rscreen, sdma); + case R600_QUERY_GPU_PFP_BUSY: + return BUSY_INDEX(rscreen, pfp); + case R600_QUERY_GPU_MEQ_BUSY: + return BUSY_INDEX(rscreen, meq); + case R600_QUERY_GPU_ME_BUSY: + return BUSY_INDEX(rscreen, me); + case R600_QUERY_GPU_SURF_SYNC_BUSY: + return BUSY_INDEX(rscreen, surf_sync); + case R600_QUERY_GPU_CP_DMA_BUSY: + return BUSY_INDEX(rscreen, cp_dma); + case R600_QUERY_GPU_SCRATCH_RAM_BUSY: + return BUSY_INDEX(rscreen, scratch_ram); + default: + unreachable("invalid query type"); + } +} + +uint64_t r600_begin_counter(struct r600_common_screen *rscreen, unsigned type) +{ + unsigned busy_index = busy_index_from_type(rscreen, type); + return r600_read_mmio_counter(rscreen, busy_index); +} + +unsigned r600_end_counter(struct r600_common_screen *rscreen, unsigned type, + uint64_t begin) +{ + unsigned busy_index = busy_index_from_type(rscreen, type); + return r600_end_mmio_counter(rscreen, begin, busy_index); +} |