1 What is the peak outstanding size of outstanding calls
1.1 if e.g. > 100k is that correct: as last week, why would a sensible
client issue more than e.g. 1000 calls without seeing replies?
1.3 if outstanding calls is <= 10000, why can test_rbt retire millions of
duty cycles / s in that scenario?
2 what does the search workload look like when replies are mixed with
calls? Ie bidirectional rpc this is intended for?
2.2 Hint: xid dist is not generally sorted; client defines only its own
issue order, not reply order nor peer xids; why is it safe to base reply
matching around xids being in sorted order?
Matt
On Sun, Mar 25, 2018, 1:40 PM William Allen Simpson <
william.allen.simp...@gmail.com> wrote:
> On 3/24/18 7:50 AM, William Allen Simpson wrote:
> > Noting that the top problem is exactly my prediction by knowledge of
> > the code:
> > clnt_req_callback() opr_rbtree_insert()
> >
> > The second is also exactly as expected:
> >
> > svc_rqst_expire_insert() opr_rbtree_insert() svc_rqst_expire_cmpf()
> >
> > These are both inserted in ascending order, sorted in ascending order,
> > and removed in ascending order....
> >
> > QED: rb_tree is a poor data structure for this purpose.
>
> I've replaced those 2 rbtrees with TAILQ, so that we are not
> spending 49% of the time there anymore, and am now seeing:
>
> rpcping tcp localhost count=1000 threads=1 workers=5 (port=2049
> program=100003 version=3 procedure=0): mean 151800.6287, total 151800.6287
> rpcping tcp localhost count=1000 threads=1 workers=5 (port=2049
> program=100003 version=3 procedure=0): mean 167828.8817, total 167828.8817
>
> This is probably good enough for now. Time to move on to
> more interesting things.
>
>
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