Messages in this thread | | | From | Stefano Garzarella <> | Subject | [PATCH liburing v2 0/1] test: add epoll test case | Date | Fri, 31 Jan 2020 15:29:42 +0100 |
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Hi Jens, this is a v2 of the epoll test.
v1 -> v2: - if IORING_FEAT_NODROP is not available, avoid to overflow the CQ - add 2 new tests to test epoll with IORING_FEAT_NODROP - cleanups
There are 4 sub-tests: 1. test_epoll 2. test_epoll_sqpoll 3. test_epoll_nodrop 4. test_epoll_sqpoll_nodrop
In the first 2 tests, I try to avoid to queue more requests than we have room for in the CQ ring. These work fine, I have no faults.
In the tests 3 and 4, if IORING_FEAT_NODROP is supported, I try to submit as much as I can until I get a -EBUSY, but they often fail in this way: the submitter manages to submit everything, the receiver receives all the submitted bytes, but the cleaner loses completion events (I also tried to put a timeout to epoll_wait() in the cleaner to be sure that it is not related to the patch that I send some weeks ago, but the situation doesn't change, it's like there is still overflow in the CQ).
Next week I'll try to investigate better which is the problem.
I hope my test make sense, otherwise let me know what is wrong.
Anyway, when I was exploring the library, I had a doubt: - in the __io_uring_get_cqe() should we call sys_io_uring_enter() also if submit and wait_nr are zero, but IORING_SQ_NEED_WAKEUP is set in the sq.kflags?
Thanks, Stefano
Stefano Garzarella (1): test: add epoll test case
.gitignore | 1 + test/Makefile | 5 +- test/epoll.c | 386 ++++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 390 insertions(+), 2 deletions(-) create mode 100644 test/epoll.c
-- 2.24.1
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