diff options
Diffstat (limited to 'src/amd/vulkan/radv_device.c')
| -rw-r--r-- | src/amd/vulkan/radv_device.c | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/src/amd/vulkan/radv_device.c b/src/amd/vulkan/radv_device.c index 85e5d9014d8..6eb37472992 100644 --- a/src/amd/vulkan/radv_device.c +++ b/src/amd/vulkan/radv_device.c @@ -4957,3 +4957,122 @@ radv_GetDeviceGroupPeerMemoryFeatures( VK_PEER_MEMORY_FEATURE_GENERIC_SRC_BIT | VK_PEER_MEMORY_FEATURE_GENERIC_DST_BIT; } + +static const VkTimeDomainEXT radv_time_domains[] = { + VK_TIME_DOMAIN_DEVICE_EXT, + VK_TIME_DOMAIN_CLOCK_MONOTONIC_EXT, + VK_TIME_DOMAIN_CLOCK_MONOTONIC_RAW_EXT, +}; + +VkResult radv_GetPhysicalDeviceCalibrateableTimeDomainsEXT( + VkPhysicalDevice physicalDevice, + uint32_t *pTimeDomainCount, + VkTimeDomainEXT *pTimeDomains) +{ + int d; + VK_OUTARRAY_MAKE(out, pTimeDomains, pTimeDomainCount); + + for (d = 0; d < ARRAY_SIZE(radv_time_domains); d++) { + vk_outarray_append(&out, i) { + *i = radv_time_domains[d]; + } + } + + return vk_outarray_status(&out); +} + +static uint64_t +radv_clock_gettime(clockid_t clock_id) +{ + struct timespec current; + int ret; + + ret = clock_gettime(clock_id, ¤t); + if (ret < 0 && clock_id == CLOCK_MONOTONIC_RAW) + ret = clock_gettime(CLOCK_MONOTONIC, ¤t); + if (ret < 0) + return 0; + + return (uint64_t) current.tv_sec * 1000000000ULL + current.tv_nsec; +} + +VkResult radv_GetCalibratedTimestampsEXT( + VkDevice _device, + uint32_t timestampCount, + const VkCalibratedTimestampInfoEXT *pTimestampInfos, + uint64_t *pTimestamps, + uint64_t *pMaxDeviation) +{ + RADV_FROM_HANDLE(radv_device, device, _device); + uint32_t clock_crystal_freq = device->physical_device->rad_info.clock_crystal_freq; + int d; + uint64_t begin, end; + uint64_t max_clock_period = 0; + + begin = radv_clock_gettime(CLOCK_MONOTONIC_RAW); + + for (d = 0; d < timestampCount; d++) { + switch (pTimestampInfos[d].timeDomain) { + case VK_TIME_DOMAIN_DEVICE_EXT: + pTimestamps[d] = device->ws->query_value(device->ws, + RADEON_TIMESTAMP); + uint64_t device_period = DIV_ROUND_UP(1000000, clock_crystal_freq); + max_clock_period = MAX2(max_clock_period, device_period); + break; + case VK_TIME_DOMAIN_CLOCK_MONOTONIC_EXT: + pTimestamps[d] = radv_clock_gettime(CLOCK_MONOTONIC); + max_clock_period = MAX2(max_clock_period, 1); + break; + + case VK_TIME_DOMAIN_CLOCK_MONOTONIC_RAW_EXT: + pTimestamps[d] = begin; + break; + default: + pTimestamps[d] = 0; + break; + } + } + + end = radv_clock_gettime(CLOCK_MONOTONIC_RAW); + + /* + * The maximum deviation is the sum of the interval over which we + * perform the sampling and the maximum period of any sampled + * clock. That's because the maximum skew between any two sampled + * clock edges is when the sampled clock with the largest period is + * sampled at the end of that period but right at the beginning of the + * sampling interval and some other clock is sampled right at the + * begining of its sampling period and right at the end of the + * sampling interval. Let's assume the GPU has the longest clock + * period and that the application is sampling GPU and monotonic: + * + * s e + * w x y z 0 1 2 3 4 5 6 7 8 9 a b c d e f + * Raw -_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_- + * + * g + * 0 1 2 3 + * GPU -----_____-----_____-----_____-----_____ + * + * m + * x y z 0 1 2 3 4 5 6 7 8 9 a b c + * Monotonic -_-_-_-_-_-_-_-_-_-_-_-_-_-_-_- + * + * Interval <-----------------> + * Deviation <--------------------------> + * + * s = read(raw) 2 + * g = read(GPU) 1 + * m = read(monotonic) 2 + * e = read(raw) b + * + * We round the sample interval up by one tick to cover sampling error + * in the interval clock + */ + + uint64_t sample_interval = end - begin + 1; + + *pMaxDeviation = sample_interval + max_clock_period; + + return VK_SUCCESS; +} |