diff options
Diffstat (limited to 'lib/i915')
| -rw-r--r-- | lib/i915/gem_ring.c | 117 | ||||
| -rw-r--r-- | lib/i915/gem_ring.h | 36 |
2 files changed, 153 insertions, 0 deletions
diff --git a/lib/i915/gem_ring.c b/lib/i915/gem_ring.c new file mode 100644 index 00000000..7326673a --- /dev/null +++ b/lib/i915/gem_ring.c @@ -0,0 +1,117 @@ +/* + * Copyright © 2014 Intel Corporation + * + * 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. + */ + +#include "gem_ring.h" + +#include <signal.h> +#include <sys/ioctl.h> + +#include "intel_reg.h" +#include "drmtest.h" +#include "ioctl_wrappers.h" +#include "igt_dummyload.h" + +static void alarm_handler(int sig) +{ +} + +/** + * gem_measure_ring_inflight: + * @fd: open i915 drm file descriptor + * @engine: execbuf engine flag + * @flags: flags to affect measurement: + * - MEASURE_RING_NEW_CTX: use a new context to account for the space + * used by the lrc init. + * + * This function calculates the maximum number of batches that can be inserted + * at the same time in the ring on the selected engine. + * + * Returns: + * Number of batches that fit in the ring + */ +unsigned int +gem_measure_ring_inflight(int fd, unsigned int engine, enum measure_ring_flags flags) +{ + struct sigaction old_sa, sa = { .sa_handler = alarm_handler }; + struct drm_i915_gem_exec_object2 obj[2]; + struct drm_i915_gem_execbuffer2 execbuf; + const uint32_t bbe = MI_BATCH_BUFFER_END; + unsigned int count, last; + struct itimerval itv; + IGT_CORK_HANDLE(cork); + + memset(obj, 0, sizeof(obj)); + obj[1].handle = gem_create(fd, 4096); + gem_write(fd, obj[1].handle, 0, &bbe, sizeof(bbe)); + + memset(&execbuf, 0, sizeof(execbuf)); + execbuf.buffers_ptr = to_user_pointer(&obj[1]); + execbuf.buffer_count = 1; + execbuf.flags = engine; + gem_execbuf(fd, &execbuf); + gem_sync(fd, obj[1].handle); + + obj[0].handle = igt_cork_plug(&cork, fd); + + execbuf.buffers_ptr = to_user_pointer(obj); + execbuf.buffer_count = 2; + + if (flags & MEASURE_RING_NEW_CTX) + execbuf.rsvd1 = gem_context_create(fd); + + sigaction(SIGALRM, &sa, &old_sa); + itv.it_interval.tv_sec = 0; + itv.it_interval.tv_usec = 100; + itv.it_value.tv_sec = 0; + itv.it_value.tv_usec = 1000; + setitimer(ITIMER_REAL, &itv, NULL); + + last = -1; + count = 0; + do { + if (ioctl(fd, DRM_IOCTL_I915_GEM_EXECBUFFER2, &execbuf) == 0) { + count++; + continue; + } + + if (last == count) + break; + + last = count; + } while (1); + + memset(&itv, 0, sizeof(itv)); + setitimer(ITIMER_REAL, &itv, NULL); + sigaction(SIGALRM, &old_sa, NULL); + + igt_cork_unplug(&cork); + gem_close(fd, obj[0].handle); + gem_close(fd, obj[1].handle); + + if (flags & MEASURE_RING_NEW_CTX) + gem_context_destroy(fd, execbuf.rsvd1); + + gem_quiescent_gpu(fd); + + return count; +} diff --git a/lib/i915/gem_ring.h b/lib/i915/gem_ring.h new file mode 100644 index 00000000..c69adce0 --- /dev/null +++ b/lib/i915/gem_ring.h @@ -0,0 +1,36 @@ +/* + * Copyright © 2014 Intel Corporation + * + * 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. + */ + +#ifndef GEM_RING_H +#define GEM_RING_H + +#include <stdbool.h> + +enum measure_ring_flags { + MEASURE_RING_NEW_CTX = 1 +}; + +unsigned int +gem_measure_ring_inflight(int fd, unsigned int engine, enum measure_ring_flags flags); + +#endif /* GEM_RING_H */ |