[igt-dev] [igt PATCH 0/1] lib: igt@i915_suspend@shrink faster

[Caz Yokoyama <caz@caz-nuc.ra.intel.com>]

igt@i915_suspend@shrink runs 25 sec instead of 90 sec on my NUC which has
2GB of memory. The child process which is created by igt_fork() updates
pinnable memory size, (*can_mlock). Parent process mlocks at the end of
"for loop" when the child process finds pinnable memory size in 4kb
boundary. This patch also reduces the chance of dying entire test process
because the parent process mclocks the memory where we already know it is
pinnable.

Incrementary mlocking small memory in addition to 3/4 of available memory
by the child process does not work because kernel finds the parent
process mlocks more memory than the child process and kills the parent
process.

Another big time consumer is igt_system_suspend_autoresume(). 15 sec of
delay is hard coded. It is too danger to reduce 15 sec because some of
test machines may fail by reducing delay time.

"gem_userptr_blits@mlocked-*" test also calls
intel_get_total_pinnable_mem(). I do not test them because they do not
finish within 30 min on my NUC without this patch.

Caz Yokoyama (1):
  igt@i915_suspend@shrink faster

 lib/intel_os.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

-- 
2.17.1

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