Re: Bihash Support in DPDK

[rajesh goel <rgoel.bangalore@gmail.com>]

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Thanks Vladimir for the confirmation.
Is there any plan to support bucket level lock support in dpdk hash.

Thanks
Rajesh

On Wed, Aug 28, 2024 at 2:33 PM Medvedkin, Vladimir <
vladimir.medvedkin@intel.com> wrote:

> Hi Rajesh,
>
>
>
> rte_hash does not support per bucket locks, instead it uses global rwlock.
>
> But you can try lock free mode (see documentation, in particular
> RTE_HASH_EXTRA_FLAGS_RW_CONCURRENCY_LF flag)
>
>
>
>
>
> *From:* rajesh goel <rgoel.bangalore@gmail.com>
> *Sent:* Tuesday, August 27, 2024 4:57 PM
> *To:* Medvedkin, Vladimir <vladimir.medvedkin@intel.com>
> *Cc:* Ferruh Yigit <ferruh.yigit@amd.com>; Wang, Yipeng1 <
> yipeng1.wang@intel.com>; Gobriel, Sameh <sameh.gobriel@intel.com>;
> Richardson, Bruce <bruce.richardson@intel.com>; dev@dpdk.org
> *Subject:* Re: Bihash Support in DPDK
>
>
>
> Thanks for the reply.
>
>
>
> Bihash I mean bounded index what Vpp supports.
>
>
>
> Iam looking for the bucket level lock support. Currently Iam using hash
> table shared by multiple process or multiple core/threads. So I have to
> take the write lock by single core and then read lock by multiple cores to
> read the value wrote in this hash table. Multiple readers are getting
> blocked due to this. I want to avoid this to increase performance.
>
>
>
> Let me know your thoughts on this.
>
>
>
> Regards
>
> Rajesh
>
>
>
> On Tue, 27 Aug, 2024, 14:44 Medvedkin, Vladimir, <
> vladimir.medvedkin@intel.com> wrote:
>
> Hi Rajesh,
>
>
>
> Please clarify what do you mean by “bihash”? Bidirectional? Bounded index?
>
>
>
> As for concurrent lookup/updates, yes, DPDK hash table supports
> multi-process/multi-thread, please see the documentation:
>
> https://doc.dpdk.org/guides/prog_guide/hash_lib.html#multi-process-support
>
>
>
>
>
> *From:* rajesh goel <rgoel.bangalore@gmail.com>
> *Sent:* Tuesday, August 27, 2024 7:04 AM
> *To:* Ferruh Yigit <ferruh.yigit@amd.com>
> *Cc:* Wang, Yipeng1 <yipeng1.wang@intel.com>; Gobriel, Sameh <
> sameh.gobriel@intel.com>; Richardson, Bruce <bruce.richardson@intel.com>;
> Medvedkin, Vladimir <vladimir.medvedkin@intel.com>; dev@dpdk.org
> *Subject:* Re: Bihash Support in DPDK
>
>
>
> Hi All,
>
> Can we get some reply.
>
>
>
> Thanks
>
> Rajesh
>
>
>
> On Thu, Aug 22, 2024 at 9:32 PM Ferruh Yigit <ferruh.yigit@amd.com> wrote:
>
> On 8/22/2024 8:51 AM, rajesh goel wrote:
> > Hi All,
> > Need info if DPDK hash library supports bihash table where for multi-
> > thread and multi-process we can update/del/lookup entries per bucket
> level.
> >
> >
>
> + hash library maintainers.
>
>

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