[ovs-dev] Questions about ovs threads patches
ethan at nicira.com
Thu Jun 27 03:54:06 UTC 2013
> When would you send the patches on creating threads in your plan?
It's a massive project, so expect to see a lot of work in this area
for quite some time. It's safe to bet that we'll have a basic multi
threading implementation within the next year or so, possibly sooner.
> On 2013/6/27 10:39, Ben Pfaff wrote:
>> The patches as sent don't create any threads. That's future work, for as-yet unposted patches.
>> On Jun 26, 2013 7:24 PM, "jerry" <jerry.lilijun at huawei.com <mailto:jerry.lilijun at huawei.com>> wrote:
>> Thanks for your quickly reply.
>> I have downloaded the codes of ovs-reviews-thread in your "reviews" repository and doing some test on new patches.
>> In my test, the multithreaded feature doesn't work and there is no change on ovs-vswitchd threads. Some results of executing "ps -ef | grep ovs" as follows:
>> linux-kKoZfU:/mnt/sdb/ovs-reviews-threads # ps -ef |grep ovs
>> root 24039 1 0 09:27 ? 00:00:00 ovsdb-server /usr/local/etc/ovs-vswitchd.conf.db --remote=punix:/usr/local/var/run/openvswitch/db.sock --remote=db:Open_vSwitch,manager_options --pidfile --detach --log-file
>> root 24042 1 0 09:27 ? 00:00:00 ovs-vswitchd unix:/usr/local/var/run/openvswitch/db.sock --pidfile --detach --log-file
>> root 24043 24042 0 09:27 ? 00:00:00 ovs-vswitchd: worker process for pid 24042
>> Then I tried to found threads in procfs info of ovs-vswitchd process with pid 24042. The result of executing "ls /proc/24042/task/" as follows:
>> linux-kKoZfU:/mnt/sdb/llj/ovs-reviews-threads # ls -l /proc/24042/task/
>> total 0
>> dr-xr-xr-x 6 root root 0 Jun 27 09:30 24042
>> I can't find any place in code where the added function xpthread_create() is called. To make ovs multithreaded, So I expect data structures added in new patches to be used by existing code in the repository.
>> Would you like to share some thoughts on that test results?
>> On 2013/6/26 23:32, Ben Pfaff wrote:
>> > On Wed, Jun 26, 2013 at 04:46:38PM +0800, jerry wrote:
>> >> I noticed that you have sent out 01~09 of 11 patches on files named
>> >> ovs-thread.c and ovs-thread.h.
>> > I sent all of them.
>> >> But I can't find the last two patch of them.
>> > Look in patchwork or in my "reviews" repository:
>> > https://github.com/blp/ovs-reviews/branches
>> >> Also the defined functions and data structures are not used in latest
>> >> open vswitch codes from git repository.
>> > Why would you expect data structures added in new patches to be used by
>> > existing code in the repository?
>> >> Is your work to make ovs multi-threaded? What's the train of thought
>> >> on the work? In my guess, maybe you separate the work of ofproto run
>> >> or run_fast from ovs-vswitchd process and run the work as a single
>> >> thread. Is that right?
>> > That's roughly the idea.
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