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benchmarks/gem_exec_ctx: Measure switching between fds

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Switching between fds also involves a context switch, include it amongst
the measurements.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson 2015-11-27 09:56:09 +00:00
parent 26507f3e21
commit d44100ed23
1 changed files with 17 additions and 7 deletions
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24
benchmarks/gem_exec_ctx.c
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@ -44,7 +44,7 @@
#include "intel_io.h"
#include "igt_stats.h"
enum mode { NOP, CREATE, SWITCH, };
enum mode { NOP, CREATE, SWITCH, DEFAULT };
#define LOCAL_I915_EXEC_NO_RELOC (1<<11)
#define LOCAL_I915_EXEC_HANDLE_LUT (1<<12)
@ -86,13 +86,15 @@ static int loop(unsigned ring, int reps, enum mode mode)
{
struct drm_i915_gem_execbuffer2 execbuf;
struct drm_i915_gem_exec_object2 gem_exec;
int count, fd;
int count, fds[2], fd;
uint32_t ctx;
fd = drm_open_driver(DRIVER_INTEL);
fd = fds[0] = drm_open_driver(DRIVER_INTEL);
fds[1] = drm_open_driver(DRIVER_INTEL);
memset(&gem_exec, 0, sizeof(gem_exec));
gem_exec.handle = batch(fd);
igt_assert(gem_open(fds[1], gem_flink(fds[0], gem_exec.handle)) == gem_exec.handle);
memset(&execbuf, 0, sizeof(execbuf));
execbuf.buffers_ptr = (uintptr_t)&gem_exec;
@ -100,16 +102,17 @@ static int loop(unsigned ring, int reps, enum mode mode)
execbuf.flags = ring;
execbuf.flags |= LOCAL_I915_EXEC_HANDLE_LUT;
execbuf.flags |= LOCAL_I915_EXEC_NO_RELOC;
execbuf.rsvd1 = __gem_context_create(fd);
if (execbuf.rsvd1 == 0)
return 77;
if (mode != DEFAULT) {
execbuf.rsvd1 = __gem_context_create(fd);
if (execbuf.rsvd1 == 0)
return 77;
}
if (__gem_execbuf(fd, &execbuf)) {
execbuf.flags = ring;
if (__gem_execbuf(fd, &execbuf))
return 77;
}
ctx = gem_context_create(fd);
for (count = 1; count <= 1<<16; count <<= 1) {
@ -136,6 +139,11 @@ static int loop(unsigned ring, int reps, enum mode mode)
execbuf.rsvd1 = ctx;
ctx = tmp;
break;
case DEFAULT:
fd = fds[count & 1];
break;
case NOP:
break;
}
@ -181,6 +189,8 @@ int main(int argc, char **argv)
mode = CREATE;
else if (strcmp(optarg, "switch") == 0)
mode = SWITCH;
else if (strcmp(optarg, "default") == 0)
mode = DEFAULT;
else if (strcmp(optarg, "nop") == 0)
mode = NOP;
else