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lib: Refactor common detection of missed interrupts

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As we have the same function in a few places to read the
debugfs/i915_ring_missed_irq file, move it to the core.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson
2016-01-22 17:33:40 +00:00
parent e0ee36141e
commit 5b675f7b2f
5 changed files with 42 additions and 73 deletions
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tests/gem_sync.c
+2 -25
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@@ -33,29 +33,6 @@ IGT_TEST_DESCRIPTION("Basic check of ring<->ring write synchronisation.");
* Extremely efficient at catching missed irqs
*/
static unsigned intel_detect_and_clear_missed_irq(int fd)
{
unsigned missed = 0;
FILE *file;
gem_quiescent_gpu(fd);
file = igt_debugfs_fopen("i915_ring_missed_irq", "r");
if (file) {
igt_assert(fscanf(file, "%x", &missed) == 1);
fclose(file);
}
if (missed) {
file = igt_debugfs_fopen("i915_ring_missed_irq", "w");
if (file) {
fwrite("0\n", 1, 2, file);
fclose(file);
}
}
return missed;
}
static double gettime(void)
{
static clockid_t clock = -1;
@@ -105,7 +82,7 @@ sync_ring(int fd, int ring, unsigned flags)
double start, elapsed;
unsigned long cycles;
intel_detect_and_clear_missed_irq(fd); /* clear before we begin */
intel_detect_and_clear_missed_interrupts(fd);
memset(&object, 0, sizeof(object));
object.handle = gem_create(fd, 4096);
@@ -130,7 +107,7 @@ sync_ring(int fd, int ring, unsigned flags)
igt_info("Completed %ld cycles: %.3f us\n", cycles, elapsed*1e6/cycles);
gem_close(fd, object.handle);
igt_assert_eq(intel_detect_and_clear_missed_irq(fd), 0);
igt_assert_eq(intel_detect_and_clear_missed_interrupts(fd), 0);
}
igt_main