` > > The RELEASE.md says it is for 17.04. But in vppctl, 'show ver' shows I am > using v17.10-rc0~19-g58eb866 > > What is latest version?
We have done quite a lot of performance work on the NAT plugin over the last
few weeks.
By latest, I meant that you would be best off following the git repo directly.
Best regards,
Ole
>
> Thanks,
> Yuliang
>
> On Tue, Oct 17, 2017 at 3:01 AM, Ole Troan <otr...@employees.org> wrote:
> Yuliang,
>
> > Get it. It use spinlock (in vppinfra/bihash_template.c):
> >
> > while (__sync_lock_test_and_set (h->writer_lock, 1))
> >
> > On Mon, Oct 16, 2017 at 11:39 AM, Yuliang Li <yuliang...@yale.edu> wrote:
> > Hi all,
> >
> > I am curious in the SNAT implementation. I see that SNAT's hash tables are
> > shared by all worker threads. Does SNAT use lock to avoid multiple threads
> > updating the hash table concurrently? If not, how does it avoid race
> > condition?
>
> Are you on latest?
> The "global" NAT state space is essentially split across all workers. So
> there is no locking.
>
> typedef struct {
> /* Main lookup tables */
> clib_bihash_8_8_t out2in;
> clib_bihash_8_8_t in2out;
>
> /* Find-a-user => src address lookup */
> clib_bihash_8_8_t user_hash;
>
> /* User pool */
> snat_user_t * users;
>
> /* Session pool */
> snat_session_t * sessions;
>
> /* Pool of doubly-linked list elements */
> dlist_elt_t * list_pool;
>
> u32 snat_thread_index;
> } snat_main_per_thread_data_t;
>
>
> Best regards,
> Ole
>
>
>
>
> --
> Yuliang Li
> PhD student
> Department of Computer Science
> Yale University
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