From: "Ananyev, Konstantin" <konstantin.ananyev@intel.com>
To: "Medvedkin, Vladimir" <vladimir.medvedkin@intel.com>,
"dev@dpdk.org" <dev@dpdk.org>
Cc: "Chilikin, Andrey" <andrey.chilikin@intel.com>,
"Wang, Yipeng1" <yipeng1.wang@intel.com>,
"Gobriel, Sameh" <sameh.gobriel@intel.com>,
"Richardson, Bruce" <bruce.richardson@intel.com>,
"Mcnamara, John" <john.mcnamara@intel.com>
Subject: Re: [dpdk-dev] [PATCH 1/5] hash: add new toeplitz hash implementation
Date: Fri, 15 Oct 2021 10:55:09 +0000 [thread overview]
Message-ID: <DM6PR11MB4491D5A470CF20848F79BC7F9AB99@DM6PR11MB4491.namprd11.prod.outlook.com> (raw)
In-Reply-To: <b748390d-e86d-6992-51c1-20a08b6d9e0d@intel.com>
> >> +/**
> >> + * Calculate Toeplitz hash.
> >> + *
> >> + * @warning
> >> + * @b EXPERIMENTAL: this API may change without prior notice.
> >> + *
> >> + * @param m
> >> + * Pointer to the matrices generated from the corresponding
> >> + * RSS hash key using rte_thash_complete_matrix().
> >> + * @param tuple
> >> + * Pointer to the data to be hashed. Data must be in network byte order.
> >> + * @param len
> >> + * Length of the data to be hashed.
> >> + * @return
> >> + * Calculated Toeplitz hash value.
> >> + */
> >> +__rte_experimental
> >> +static inline uint32_t
> >> +rte_thash_gfni(uint64_t *m, uint8_t *tuple, int len)
> >> +{
> >> + uint32_t val, val_zero;
> >> +
> >> + __m512i xor_acc = __rte_thash_gfni(m, tuple, NULL, len);
> >> + __rte_thash_xor_reduce(xor_acc, &val, &val_zero);
> >> +
> >> + return val;
> >> +}
> >> +
> >> +/**
> >> + * Calculate Toeplitz hash for two independent data buffers.
> >> + *
> >> + * @warning
> >> + * @b EXPERIMENTAL: this API may change without prior notice.
> >> + *
> >> + * @param m
> >> + * Pointer to the matrices generated from the corresponding
> >> + * RSS hash key using rte_thash_complete_matrix().
> >> + * @param tuple_1
> >> + * Pointer to the data to be hashed. Data must be in network byte order.
> >> + * @param tuple_2
> >> + * Pointer to the data to be hashed. Data must be in network byte order.
> >> + * @param len
> >> + * Length of the largest data buffer to be hashed.
> >> + * @param val_1
> >> + * Pointer to uint32_t where to put calculated Toeplitz hash value for
> >> + * the first tuple.
> >> + * @param val_2
> >> + * Pointer to uint32_t where to put calculated Toeplitz hash value for
> >> + * the second tuple.
> >> + */
> >> +__rte_experimental
> >> +static inline void
> >> +rte_thash_gfni_x2(uint64_t *mtrx, uint8_t *tuple_1, uint8_t *tuple_2, int len,
> >> + uint32_t *val_1, uint32_t *val_2)
> >
> > Why just two?
> > Why not uint8_t *tuple[]
> > ?
> >
>
> x2 version was added because there was unused space inside the ZMM which
> holds input key (input tuple) bytes for a second input key, so it helps
> to improve performance in some cases.
> Bulk version wasn't added because for the vast majority of cases it will
> be used with a single input key.
> Hiding this function inside .c will greatly affect performance, because
> it takes just a few cycles to calculate the hash for the most popular
> key sizes.
Ok, but it still unclear to me why for 2 only?
What stops you from doing:
static inline void
rte_thash_gfni_bulk(const uint64_t *mtrx, uint32_t len, uint8_t *tuple[], uint32_t val[], uint32_t num)
{
for (i = 0; i != (num & ~1); i += 2) {
xor_acc = __rte_thash_gfni(mtrx, tuple[i], tuple[i+ 1], len);
__rte_thash_xor_reduce(xor_acc, val + i, val + i + 1);
}
If (num & 1) {
xor_acc = __rte_thash_gfni(mtrx, tuple[i], NULL, len);
__rte_thash_xor_reduce(xor_acc, val + i, &val_zero);
}
}
?
next prev parent reply other threads:[~2021-10-15 10:55 UTC|newest]
Thread overview: 72+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-06 16:03 [dpdk-dev] [PATCH 0/5] optimized Toeplitz " Vladimir Medvedkin
2021-09-06 16:03 ` [dpdk-dev] [PATCH 1/5] hash: add new toeplitz " Vladimir Medvedkin
2021-10-07 18:23 ` Ananyev, Konstantin
2021-10-08 11:19 ` Ananyev, Konstantin
2021-10-15 9:11 ` Medvedkin, Vladimir
2021-10-15 10:55 ` Ananyev, Konstantin [this message]
2021-10-15 13:09 ` Medvedkin, Vladimir
2021-09-06 16:03 ` [dpdk-dev] [PATCH 2/5] hash: enable gfni thash implementation Vladimir Medvedkin
2021-10-08 11:31 ` Ananyev, Konstantin
2021-10-15 9:13 ` Medvedkin, Vladimir
2021-09-06 16:03 ` [dpdk-dev] [PATCH 3/5] doc/hash: update documentation for the thash library Vladimir Medvedkin
2021-09-06 16:03 ` [dpdk-dev] [PATCH 4/5] test/thash: add tests for a new Toeplitz hash function Vladimir Medvedkin
2021-09-07 0:35 ` Stephen Hemminger
2021-09-08 13:59 ` Medvedkin, Vladimir
2021-09-06 16:03 ` [dpdk-dev] [PATCH 5/5] test/thash: add performance tests for the Toeplitz hash Vladimir Medvedkin
2021-10-15 9:30 ` [dpdk-dev] [PATCH v2 0/5] optimized Toeplitz hash implementation Vladimir Medvedkin
2021-10-20 18:20 ` [dpdk-dev] [PATCH v3 " Vladimir Medvedkin
2021-10-21 17:18 ` [dpdk-dev] [PATCH v4 " Vladimir Medvedkin
2021-10-21 18:54 ` [dpdk-dev] [PATCH v5 " Vladimir Medvedkin
2021-10-21 18:54 ` [dpdk-dev] [PATCH v5 1/5] hash: add new toeplitz " Vladimir Medvedkin
2021-10-25 17:05 ` Thomas Monjalon
2021-10-21 18:54 ` [dpdk-dev] [PATCH v5 2/5] hash: enable gfni thash implementation Vladimir Medvedkin
2021-10-21 18:54 ` [dpdk-dev] [PATCH v5 3/5] doc/hash: update documentation for the thash library Vladimir Medvedkin
2021-10-25 17:04 ` Thomas Monjalon
2021-10-26 20:30 ` Medvedkin, Vladimir
2021-10-21 18:54 ` [dpdk-dev] [PATCH v5 4/5] test/thash: add tests for a new Toeplitz hash function Vladimir Medvedkin
2021-10-21 18:54 ` [dpdk-dev] [PATCH v5 5/5] test/thash: add performance tests for the Toeplitz hash Vladimir Medvedkin
2021-10-25 17:02 ` Thomas Monjalon
2021-10-26 20:29 ` Medvedkin, Vladimir
2021-10-27 8:29 ` Thomas Monjalon
2021-10-27 15:48 ` Medvedkin, Vladimir
2021-10-25 17:27 ` Stephen Hemminger
2021-10-26 20:31 ` Medvedkin, Vladimir
2021-10-21 17:18 ` [dpdk-dev] [PATCH v4 1/5] hash: add new toeplitz hash implementation Vladimir Medvedkin
2021-10-21 17:18 ` [dpdk-dev] [PATCH v4 2/5] hash: enable gfni thash implementation Vladimir Medvedkin
2021-10-21 17:18 ` [dpdk-dev] [PATCH v4 3/5] doc/hash: update documentation for the thash library Vladimir Medvedkin
2021-10-21 17:18 ` [dpdk-dev] [PATCH v4 4/5] test/thash: add tests for a new Toeplitz hash function Vladimir Medvedkin
2021-10-21 17:18 ` [dpdk-dev] [PATCH v4 5/5] test/thash: add performance tests for the Toeplitz hash Vladimir Medvedkin
2021-10-20 18:20 ` [dpdk-dev] [PATCH v3 1/5] hash: add new toeplitz hash implementation Vladimir Medvedkin
2021-10-21 9:42 ` Ananyev, Konstantin
2021-10-21 17:17 ` Medvedkin, Vladimir
2021-10-20 18:20 ` [dpdk-dev] [PATCH v3 2/5] hash: enable gfni thash implementation Vladimir Medvedkin
2021-10-21 9:46 ` Ananyev, Konstantin
2021-10-20 18:20 ` [dpdk-dev] [PATCH v3 3/5] doc/hash: update documentation for the thash library Vladimir Medvedkin
2021-10-20 18:20 ` [dpdk-dev] [PATCH v3 4/5] test/thash: add tests for a new Toeplitz hash function Vladimir Medvedkin
2021-10-20 18:20 ` [dpdk-dev] [PATCH v3 5/5] test/thash: add performance tests for the Toeplitz hash Vladimir Medvedkin
2021-10-15 9:30 ` [dpdk-dev] [PATCH v2 1/5] hash: add new toeplitz hash implementation Vladimir Medvedkin
2021-10-15 16:58 ` Stephen Hemminger
2021-10-18 10:40 ` Ananyev, Konstantin
2021-10-19 1:15 ` Stephen Hemminger
2021-10-19 15:42 ` Medvedkin, Vladimir
2021-10-18 11:08 ` Medvedkin, Vladimir
2021-10-15 9:30 ` [dpdk-dev] [PATCH v2 2/5] hash: enable gfni thash implementation Vladimir Medvedkin
2021-10-15 9:30 ` [dpdk-dev] [PATCH v2 3/5] doc/hash: update documentation for the thash library Vladimir Medvedkin
2021-10-15 9:30 ` [dpdk-dev] [PATCH v2 4/5] test/thash: add tests for a new Toeplitz hash function Vladimir Medvedkin
2021-10-15 9:30 ` [dpdk-dev] [PATCH v2 5/5] test/thash: add performance tests for the Toeplitz hash Vladimir Medvedkin
2021-10-26 20:32 ` [dpdk-dev] [PATCH v6 0/4] optimized Toeplitz hash implementation Vladimir Medvedkin
2021-10-26 20:32 ` [dpdk-dev] [PATCH v6 1/4] hash: add new toeplitz " Vladimir Medvedkin
2021-10-26 20:32 ` [dpdk-dev] [PATCH v6 2/4] hash: add bulk " Vladimir Medvedkin
2021-10-26 20:32 ` [dpdk-dev] [PATCH v6 3/4] hash: enable gfni thash implementation Vladimir Medvedkin
2021-10-26 20:32 ` [dpdk-dev] [PATCH v6 4/4] test/thash: add performance tests for the Toeplitz hash Vladimir Medvedkin
2021-10-27 16:16 ` [dpdk-dev] [PATCH v7 0/4] optimized Toeplitz hash implementation Vladimir Medvedkin
2021-10-27 16:16 ` [dpdk-dev] [PATCH v7 1/4] hash: add new toeplitz " Vladimir Medvedkin
2021-10-27 16:16 ` [dpdk-dev] [PATCH v7 2/4] hash: add bulk " Vladimir Medvedkin
2021-10-27 16:16 ` [dpdk-dev] [PATCH v7 3/4] hash: enable gfni thash implementation Vladimir Medvedkin
2021-10-27 16:16 ` [dpdk-dev] [PATCH v7 4/4] test/thash: add performance tests for the Toeplitz hash Vladimir Medvedkin
2021-11-02 18:38 ` [dpdk-dev] [PATCH v8 0/4] optimized Toeplitz hash implementation Vladimir Medvedkin
2021-11-04 10:20 ` Thomas Monjalon
2021-11-02 18:38 ` [dpdk-dev] [PATCH v8 1/4] hash: add new toeplitz " Vladimir Medvedkin
2021-11-02 18:38 ` [dpdk-dev] [PATCH v8 2/4] hash: add bulk " Vladimir Medvedkin
2021-11-02 18:38 ` [dpdk-dev] [PATCH v8 3/4] hash: enable gfni thash implementation Vladimir Medvedkin
2021-11-02 18:38 ` [dpdk-dev] [PATCH v8 4/4] test/thash: add performance tests for the Toeplitz hash Vladimir Medvedkin
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