From 9f2621e1b5301f33c676a99c52879d3c6984b524 Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Tue, 3 May 2016 09:10:52 +0100 Subject: [PATCH] igt/gem_exec_flush: Test continuously rewriting the batch Signed-off-by: Chris Wilson --- tests/gem_exec_flush.c | 180 ++++++++++++++++++++++++++++++++++++++++- 1 file changed, 179 insertions(+), 1 deletion(-) diff --git a/tests/gem_exec_flush.c b/tests/gem_exec_flush.c index 1b5172c6..7f0cddd3 100644 --- a/tests/gem_exec_flush.c +++ b/tests/gem_exec_flush.c @@ -232,10 +232,180 @@ overwrite: igt_waitchildren(); } +enum batch_mode { + BATCH_KERNEL, + BATCH_USER, + BATCH_CPU, + BATCH_GTT, + BATCH_WC, +}; +static void batch(int fd, unsigned ring, int nchild, int timeout, + enum batch_mode mode) +{ + const int gen = intel_gen(intel_get_drm_devid(fd)); + + igt_fork(child, nchild) { + const uint32_t bbe = MI_BATCH_BUFFER_END; + struct drm_i915_gem_exec_object2 obj[2]; + struct drm_i915_gem_relocation_entry reloc; + struct drm_i915_gem_execbuffer2 execbuf; + unsigned long cycles = 0; + uint32_t *ptr; + uint32_t *map; + int i; + + memset(obj, 0, sizeof(obj)); + obj[0].handle = gem_create(fd, 4096); + obj[0].flags |= EXEC_OBJECT_WRITE; + + map = gem_mmap__cpu(fd, obj[0].handle, 0, 4096, PROT_WRITE); + + gem_set_domain(fd, obj[0].handle, + I915_GEM_DOMAIN_CPU, + I915_GEM_DOMAIN_CPU); + for (i = 0; i < 1024; i++) + map[i] = 0xabcdabcd; + + memset(&execbuf, 0, sizeof(execbuf)); + execbuf.buffers_ptr = (uintptr_t)obj; + execbuf.buffer_count = 2; + execbuf.flags = ring | (1 << 11) | (1<<12); + if (gen < 6) + execbuf.flags |= I915_EXEC_SECURE; + + obj[1].handle = gem_create(fd, 4096); + gem_write(fd, obj[1].handle, 0, &bbe, sizeof(bbe)); + igt_require(__gem_execbuf(fd, &execbuf) == 0); + + obj[1].relocation_count = 1; + obj[1].relocs_ptr = (uintptr_t)&reloc; + + switch (mode) { + case BATCH_CPU: + case BATCH_USER: + ptr = gem_mmap__cpu(fd, obj[1].handle, 0, 4096, + PROT_WRITE); + break; + + case BATCH_WC: + ptr = gem_mmap__wc(fd, obj[1].handle, 0, 4096, + PROT_WRITE); + break; + + case BATCH_GTT: + ptr = gem_mmap__gtt(fd, obj[1].handle, 4096, + PROT_WRITE); + break; + + case BATCH_KERNEL: + ptr = mmap(0, 4096, PROT_WRITE, + MAP_PRIVATE | MAP_ANON, -1, 0); + break; + } + + memset(&reloc, 0, sizeof(reloc)); + reloc.presumed_offset = obj[0].offset; + reloc.offset = sizeof(uint32_t); + if (gen >= 4 && gen < 8) + reloc.offset += sizeof(uint32_t); + reloc.read_domains = I915_GEM_DOMAIN_INSTRUCTION; + reloc.write_domain = I915_GEM_DOMAIN_INSTRUCTION; + + igt_timeout(timeout) { + for (i = 0; i < 1024; i++) { + uint64_t offset; + uint32_t *b = ptr; + + switch (mode) { + case BATCH_CPU: + gem_set_domain(fd, obj[1].handle, + I915_GEM_DOMAIN_CPU, I915_GEM_DOMAIN_CPU); + break; + + case BATCH_WC: + case BATCH_GTT: + gem_set_domain(fd, obj[1].handle, + I915_GEM_DOMAIN_GTT, I915_GEM_DOMAIN_GTT); + break; + + case BATCH_USER: + gem_sync(fd, obj[1].handle); + break; + + case BATCH_KERNEL: + break; + } + + reloc.delta = i * sizeof(uint32_t); + + offset = reloc.presumed_offset + reloc.delta; + *b++ = MI_STORE_DWORD_IMM | (gen < 6 ? 1 << 22 : 0); + if (gen >= 8) { + *b++ = offset; + *b++ = offset >> 32; + } else if (gen >= 4) { + *b++ = 0; + *b++ = offset; + } else { + b[-1] -= 1; + *b++ = offset; + } + *b++ = i; + *b++ = MI_BATCH_BUFFER_END; + + switch (mode) { + case BATCH_KERNEL: + gem_write(fd, obj[1].handle, 0, + ptr, (b - ptr) * sizeof(uint32_t)); + break; + + case BATCH_USER: + igt_clflush_range(ptr, (b - ptr) * sizeof(uint32_t)); + break; + + case BATCH_CPU: + case BATCH_GTT: + case BATCH_WC: + break; + } + gem_execbuf(fd, &execbuf); + cycles++; + } + + gem_set_domain(fd, obj[0].handle, + I915_GEM_DOMAIN_CPU, + I915_GEM_DOMAIN_CPU); + for (i = 0; i < 1024; i++) { + igt_assert_eq(map[i], i); + map[i] = 0xabcdabcd; + } + } + igt_info("Child[%d]: %lu cycles\n", child, cycles); + + munmap(ptr, 4096); + gem_close(fd, obj[1].handle); + + munmap(map, 4096); + gem_close(fd, obj[0].handle); + } + igt_waitchildren(); +} + igt_main { const struct intel_execution_engine *e; const int ncpus = sysconf(_SC_NPROCESSORS_ONLN); + const struct batch { + const char *name; + unsigned mode; + } batches[] = { + { "kernel", BATCH_KERNEL }, + { "user", BATCH_USER }, + { "cpu", BATCH_CPU }, + { "gtt", BATCH_GTT }, + { "wc", BATCH_WC }, + { NULL } + }; const struct mode { const char *name; unsigned flags; @@ -245,7 +415,7 @@ igt_main { "pro", KERNEL }, { "prw", KERNEL | WRITE }, { "set", SET_DOMAIN | WRITE }, - { NULL }, + { NULL } }; int gen = -1; int fd = -1; @@ -271,6 +441,14 @@ igt_main "MI_STORE_DATA broken on gen6 bsd\n"); } + for (const struct batch *b = batches; b->name; b++) { + igt_subtest_f("%sbatch-%s-%s", + e->exec_id == 0 ? "basic-" : "", + b->name, + e->name) + batch(fd, ring, ncpus, timeout, b->mode); + } + for (const struct mode *m = modes; m->name; m++) { igt_subtest_f("%suc-%s-%s", e->exec_id == 0 ? "basic-" : "",