Commit 21912a65 authored by Peter Xu's avatar Peter Xu Committed by Sean Christopherson
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KVM: selftests: Allow dumping per-vcpu info for uffd threads 



There's one PER_VCPU_DEBUG in per-vcpu uffd threads but it's never hit.

Trigger that when quit in normal ways (kick pollfd[1]), meanwhile fix the
number of nanosec calculation.

Signed-off-by: default avatarPeter Xu <peterx@redhat.com>
Reviewed-by: default avatarJames Houghton <jthoughton@google.com>
Link: https://lore.kernel.org/r/20230427201112.2164776-3-peterx@redhat.com


Signed-off-by: default avatarSean Christopherson <seanjc@google.com>
parent ba125de3

tools/testing/selftests/kvm/lib/userfaultfd_util.c

+2 −2
Original line number Diff line number Diff line
@@ -70,7 +70,7 @@ static void *uffd_handler_thread_fn(void *arg) 
			r = read(pollfd[1].fd, &tmp_chr, 1);

			TEST_ASSERT(r == 1,

				    "Error reading pipefd in UFFD thread\n");

			return NULL;

			break;

		}



		if (!(pollfd[0].revents & POLLIN))
@@ -103,7 +103,7 @@ static void *uffd_handler_thread_fn(void *arg) 
	ts_diff = timespec_elapsed(start);

	PER_VCPU_DEBUG("userfaulted %ld pages over %ld.%.9lds. (%f/sec)\n",

		       pages, ts_diff.tv_sec, ts_diff.tv_nsec,

		       pages / ((double)ts_diff.tv_sec + (double)ts_diff.tv_nsec / 100000000.0));

		       pages / ((double)ts_diff.tv_sec + (double)ts_diff.tv_nsec / NSEC_PER_SEC));



	return NULL;

}