[Tarantool-patches] [PATCH 1/3] test: tarantool -e test add more details and avoid busy loop
Leonid Vasiliev
lvasiliev at tarantool.org
Tue Dec 29 19:53:28 MSK 2020
Hi! Thank you for the patch.
See a comment bellow:
On 29.12.2020 19:25, Artem Starshov wrote:
> From: Alexander Turenko <alexander.turenko at tarantool.org>
>
> Background: the test fails on waiting the process termination, but
> surprisingly only on GitHub hosted runners.
>
> My guess is that the process becomes zombie, but we don't collect it.
>
> A busy loop is not good in general. It is better to pass execution to
> other fibers if there is nothing to do. This way the waiting will not
> eat 100% CPU time.
>
> Added collect more details in tarantool -e 'assert(false)' test.
> ---
> .../gh-4983-tnt-e-assert-false-hangs.test.lua | 13 ++++++++++++-
> 1 file changed, 12 insertions(+), 1 deletion(-)
>
> diff --git a/test/app-tap/gh-4983-tnt-e-assert-false-hangs.test.lua b/test/app-tap/gh-4983-tnt-e-assert-false-hangs.test.lua
> index 656fe212b..ff3281e0f 100755
> --- a/test/app-tap/gh-4983-tnt-e-assert-false-hangs.test.lua
> +++ b/test/app-tap/gh-4983-tnt-e-assert-false-hangs.test.lua
> @@ -31,6 +31,7 @@ local function wait_process_completion(pid, timeout)
> process_completed = true
> break
> end
> + fiber.sleep(0.01)
> end
> return process_completed
> end
> @@ -74,8 +75,18 @@ local res = tap.test('gh-4983-tnt-e-assert-false-hangs', function(test)
> local process_completed = wait_process_completion(pid,
> process_waiting_timeout)
>
> + local details
It looks like the details are only interesting in case of failure. Maybe
we will collect it only in this case?
> + pcall(function()
> + details = {
> + cmdline = fio.open(('/proc/%d/cmdline'):format(pid),
> + {'O_RDONLY'}):read(1000000),
> + status = fio.open(('/proc/%d/status'):format(pid),
> + {'O_RDONLY'}):read(1000000),
> + }
> + end)
> test:ok(process_completed,
> - ('tarantool process with pid = %d completed'):format(pid))
> + ('tarantool process with pid = %d completed'):format(pid),
> + details)
>
> -- Kill process if hangs.
> if not process_completed then ffi.C.kill(pid, 9) end
>
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