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benchmarks/gem_exec_nop: Include a measurement across all rings

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For sync, it really is just the average latency across all rings, but
for continuous we can expect to see the effect of concurrent dispatch
across rings. Hopefully.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson 2016-03-23 12:37:38 +00:00
parent 6867b87b73
commit 4e2a785e24
1 changed files with 30 additions and 6 deletions
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32
benchmarks/gem_exec_nop.c
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@ -47,6 +47,11 @@
#define LOCAL_I915_EXEC_NO_RELOC (1<<11)
#define LOCAL_I915_EXEC_HANDLE_LUT (1<<12)
#define LOCAL_I915_EXEC_BSD_SHIFT (13)
#define LOCAL_I915_EXEC_BSD_MASK (3 << LOCAL_I915_EXEC_BSD_SHIFT)
#define ENGINE_FLAGS (I915_EXEC_RING_MASK | LOCAL_I915_EXEC_BSD_MASK)
#define SYNC 0x1
static double elapsed(const struct timespec *start,
@ -67,6 +72,8 @@ static int loop(unsigned ring, int reps, unsigned flags)
{
struct drm_i915_gem_execbuffer2 execbuf;
struct drm_i915_gem_exec_object2 gem_exec;
unsigned engines[16];
unsigned nengine;
int fd;
fd = drm_open_driver(DRIVER_INTEL);
@ -77,15 +84,26 @@ static int loop(unsigned ring, int reps, unsigned flags)
memset(&execbuf, 0, sizeof(execbuf));
execbuf.buffers_ptr = (uintptr_t)&gem_exec;
execbuf.buffer_count = 1;
execbuf.flags = ring;
execbuf.flags |= LOCAL_I915_EXEC_HANDLE_LUT;
execbuf.flags |= LOCAL_I915_EXEC_NO_RELOC;
if (__gem_execbuf(fd, &execbuf)) {
execbuf.flags = ring;
execbuf.flags = 0;
if (__gem_execbuf(fd, &execbuf))
return 77;
}
nengine = 0;
if (ring == -1) {
for (ring = 1; ring < 16; ring++) {
execbuf.flags &= ~ENGINE_FLAGS;
execbuf.flags |= ring;
if (__gem_execbuf(fd, &execbuf) == 0)
engines[nengine++] = ring;
}
} else
engines[nengine++] = ring;
while (reps--) {
struct timespec start, end;
unsigned count = 0;
@ -95,10 +113,14 @@ static int loop(unsigned ring, int reps, unsigned flags)
clock_gettime(CLOCK_MONOTONIC, &start);
do {
do_ioctl(fd, DRM_IOCTL_I915_GEM_EXECBUFFER2, &execbuf);
count++;
for (int inner = 0; inner < 1024; inner++) {
execbuf.flags &= ~ENGINE_FLAGS;
execbuf.flags |= engines[count++ % nengine];
gem_execbuf(fd, &execbuf);
if (flags & SYNC)
gem_sync(fd, gem_exec.handle);
}
clock_gettime(CLOCK_MONOTONIC, &end);
} while (elapsed(&start, &end) < 2.);
@ -128,6 +150,8 @@ int main(int argc, char **argv)
ring = I915_EXEC_BLT;
else if (strcmp(optarg, "vecs") == 0)
ring = I915_EXEC_VEBOX;
else if (strcmp(optarg, "all") == 0)
ring = -1;
else
ring = atoi(optarg);
break;