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From: Bruce Richardson <bruce.richardson@intel.com>
To: Yari Adan Petralanda <yari.adan.petralanda@ericsson.com>
Cc: pablo.de.lara.guarch@intel.com,
	Juan Antonio Montesinos Delgado
	<juan.antonio.montesinos.delgado@ericsson.com>,
	dev@dpdk.org
Subject: Re: [dpdk-dev] [PATCH] hash: new function to retrieve a key given its position
Date: Thu, 16 Jun 2016 10:50:26 +0100	[thread overview]
Message-ID: <20160616095026.GD11016@bricha3-MOBL3> (raw)
In-Reply-To: <576261C6.2050600@ericsson.com>

On Thu, Jun 16, 2016 at 10:22:30AM +0200, Yari Adan Petralanda wrote:
> The function rte_hash_get_key_with_position is added in this patch.
> As the position returned when adding a key is frequently used as an offset
> into an array of user data, this function performs the operation of
> retrieving a key given this offset.
> 
> A possible use case would be to delete a key from the hash table when its
> entry in the array of data has certain value. For instance, the key could be
> a flow 5-tuple, and the value stored in the array a time stamp.
> 

I have my doubts that this will work. With cuckoo hashing, a hash table entry
can change position multiple times after it is added, as the table is reorganised
to make room for new entries.

Regards,
/Bruce

       reply	other threads:[~2016-06-16  9:50 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <576261C6.2050600@ericsson.com>
2016-06-16  9:50 ` Bruce Richardson [this message]
     [not found]   ` <3781680C02E745459CFC91251B914AEB5F099E@ESESSMB207.ericsson.se>
2016-06-16 10:55     ` Bruce Richardson
2016-06-16 12:23 ` De Lara Guarch, Pablo

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