Re: [PATCH] epoll: restrict EPOLLEXCLUSIVE to POLLIN and POLLOUT

Andrew Morton @ 2016-02-05 00:59 rakstīja:

On Thu, 04 Feb 2016 23:44:05 +0200 Madars Vitolins [off-list ref] 
wrote:

quoted

Hi Jason,


Just run off the original tests with this patch (eventpoll.c from
4.5-rc2 + patch bellow). Got the same good results, no regression.

$ time ./bankcl
Account balance is: 1359856158.04 USD
Account balance is: 1359856158.04 USD
Account balance is: 1359856158.04 USD
Account balance is: 1359856158.04 USD
Account balance is: 1359856158.04 USD
Account balance is: 1359856158.04 USD
Account balance is: 1359856158.04 USD
Account balance is: 1359856158.04 USD
Account balance is: 1359856158.04 USD
Account balance is: 101528948.40 USD

real	0m41.826s
user	0m29.513s
sys	0m6.490s


Test case:
https://mvitolin.wordpress.com/2015/12/05/endurox-testing-epollexclusive-flag/

PS,

Original cases 0m24.953s vs 0m41.826s now probably is related with my 
pc
setup. As I just now re-run test with original patch, got the same ~41
sec.

So I am fine with this patch!

Thanks, I shall add your Tested-by:

One thing we're sorely missing is an epoll test suite, in
tools/testing/selftests.  If anyone has anything which we can use to
kick things off, please hand it over ;)

Not bad idea, probably we need a "tools/testing/selftests/eventpoll" 
folder under which we should have test cases for various epoll scenarios 
with common "run.sh". In spare time I can try to build a case for 
EXCLUSIVE flag (with queues & multiple processes :) ).

Thanks,
Madars