From: "Ananyev, Konstantin" <konstantin.ananyev@intel.com>
To: "Li, Xiaoyun" <xiaoyun.li@intel.com>,
"Richardson, Bruce" <bruce.richardson@intel.com>
Cc: "Lu, Wenzhuo" <wenzhuo.lu@intel.com>,
"Zhang, Helin" <helin.zhang@intel.com>,
"dev@dpdk.org" <dev@dpdk.org>
Subject: Re: [dpdk-dev] [PATCH v4 3/3] efd: run-time dispatch over x86 EFD functions
Date: Mon, 2 Oct 2017 16:52:25 +0000 [thread overview]
Message-ID: <2601191342CEEE43887BDE71AB9772585FAA2FCD@IRSMSX103.ger.corp.intel.com> (raw)
In-Reply-To: <1506960796-71620-4-git-send-email-xiaoyun.li@intel.com>
> -----Original Message-----
> From: Li, Xiaoyun
> Sent: Monday, October 2, 2017 5:13 PM
> To: Ananyev, Konstantin <konstantin.ananyev@intel.com>; Richardson, Bruce <bruce.richardson@intel.com>
> Cc: Lu, Wenzhuo <wenzhuo.lu@intel.com>; Zhang, Helin <helin.zhang@intel.com>; dev@dpdk.org; Li, Xiaoyun <xiaoyun.li@intel.com>
> Subject: [PATCH v4 3/3] efd: run-time dispatch over x86 EFD functions
>
> This patch dynamically selects x86 EFD functions at run-time.
> This patch uses function pointer and binds it to the relative
> function based on CPU flags at constructor time.
>
> Signed-off-by: Xiaoyun Li <xiaoyun.li@intel.com>
> ---
> lib/librte_efd/rte_efd_x86.h | 41 ++++++++++++++++++++++++++++++++++++++---
> 1 file changed, 38 insertions(+), 3 deletions(-)
>
> diff --git a/lib/librte_efd/rte_efd_x86.h b/lib/librte_efd/rte_efd_x86.h
> index 34f37d7..93b6743 100644
> --- a/lib/librte_efd/rte_efd_x86.h
> +++ b/lib/librte_efd/rte_efd_x86.h
> @@ -43,12 +43,29 @@
> #define EFD_LOAD_SI128(val) _mm_lddqu_si128(val)
> #endif
>
> +typedef efd_value_t
> +(*efd_lookup_internal_avx2_t)(const efd_hashfunc_t *group_hash_idx,
> + const efd_lookuptbl_t *group_lookup_table,
> + const uint32_t hash_val_a, const uint32_t hash_val_b);
> +
> +static efd_lookup_internal_avx2_t efd_lookup_internal_avx2_ptr;
> +
> static inline efd_value_t
> efd_lookup_internal_avx2(const efd_hashfunc_t *group_hash_idx,
> const efd_lookuptbl_t *group_lookup_table,
> const uint32_t hash_val_a, const uint32_t hash_val_b)
> {
> -#ifdef RTE_MACHINE_CPUFLAG_AVX2
> + return (*efd_lookup_internal_avx2_ptr)(group_hash_idx,
> + group_lookup_table,
> + hash_val_a, hash_val_b);
I don't think you need all that.
All you need - build proper avx2 function even if current HW doesn't support it.
The existing runtime selection here seems ok already.
Konstantin
> +}
> +
> +#ifdef CC_SUPPORT_AVX2
> +static inline efd_value_t
> +efd_lookup_internal_avx2_AVX2(const efd_hashfunc_t *group_hash_idx,
> + const efd_lookuptbl_t *group_lookup_table,
> + const uint32_t hash_val_a, const uint32_t hash_val_b)
> +{
> efd_value_t value = 0;
> uint32_t i = 0;
> __m256i vhash_val_a = _mm256_set1_epi32(hash_val_a);
> @@ -74,13 +91,31 @@ efd_lookup_internal_avx2(const efd_hashfunc_t *group_hash_idx,
> }
>
> return value;
> -#else
> +}
> +#endif
> +
> +static inline efd_value_t
> +efd_lookup_internal_avx2_DEFAULT(const efd_hashfunc_t *group_hash_idx,
> + const efd_lookuptbl_t *group_lookup_table,
> + const uint32_t hash_val_a, const uint32_t hash_val_b)
> +{
> RTE_SET_USED(group_hash_idx);
> RTE_SET_USED(group_lookup_table);
> RTE_SET_USED(hash_val_a);
> RTE_SET_USED(hash_val_b);
> /* Return dummy value, only to avoid compilation breakage */
> return 0;
> -#endif
> +}
>
> +static void __attribute__((constructor))
> +rte_efd_x86_init(void)
> +{
> +#ifdef CC_SUPPORT_AVX2
> + if (rte_cpu_get_flag_enabled(RTE_CPUFLAG_AVX2))
> + efd_lookup_internal_avx2_ptr = efd_lookup_internal_avx2_AVX2;
> + else
> + efd_lookup_internal_avx2_ptr = efd_lookup_internal_avx2_DEFAULT;
> +#else
> + efd_lookup_internal_avx2_ptr = efd_lookup_internal_avx2_DEFAULT;
> +#endif
> }
> --
> 2.7.4
next prev parent reply other threads:[~2017-10-02 16:52 UTC|newest]
Thread overview: 87+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-09-26 7:41 [dpdk-dev] [PATCH v3 0/3] dynamic linking support Xiaoyun Li
2017-09-26 7:41 ` [dpdk-dev] [PATCH v3 1/3] eal/x86: run-time dispatch over memcpy Xiaoyun Li
2017-10-01 23:41 ` Ananyev, Konstantin
2017-10-02 0:12 ` Li, Xiaoyun
2017-09-26 7:41 ` [dpdk-dev] [PATCH v3 2/3] app/test: run-time dispatch over memcpy perf test Xiaoyun Li
2017-09-26 7:41 ` [dpdk-dev] [PATCH v3 3/3] efd: run-time dispatch over x86 EFD functions Xiaoyun Li
2017-10-02 0:08 ` Ananyev, Konstantin
2017-10-02 0:09 ` Li, Xiaoyun
2017-10-02 9:35 ` Ananyev, Konstantin
2017-10-02 16:13 ` [dpdk-dev] [PATCH v4 0/3] run-time Linking support Xiaoyun Li
2017-10-02 16:13 ` [dpdk-dev] [PATCH v4 1/3] eal/x86: run-time dispatch over memcpy Xiaoyun Li
2017-10-02 16:39 ` Ananyev, Konstantin
2017-10-02 23:10 ` Li, Xiaoyun
2017-10-03 11:15 ` Ananyev, Konstantin
2017-10-03 11:39 ` Li, Xiaoyun
2017-10-03 12:12 ` Ananyev, Konstantin
2017-10-03 12:23 ` Li, Xiaoyun
2017-10-02 16:13 ` [dpdk-dev] [PATCH v4 2/3] app/test: run-time dispatch over memcpy perf test Xiaoyun Li
2017-10-02 16:13 ` [dpdk-dev] [PATCH v4 3/3] efd: run-time dispatch over x86 EFD functions Xiaoyun Li
2017-10-02 16:52 ` Ananyev, Konstantin [this message]
2017-10-03 8:15 ` Li, Xiaoyun
2017-10-03 11:23 ` Ananyev, Konstantin
2017-10-03 11:27 ` Li, Xiaoyun
2017-10-03 14:59 ` [dpdk-dev] [PATCH v5 0/3] run-time Linking support Xiaoyun Li
2017-10-03 14:59 ` [dpdk-dev] [PATCH v5 1/3] eal/x86: run-time dispatch over memcpy Xiaoyun Li
2017-10-03 14:59 ` [dpdk-dev] [PATCH v5 2/3] app/test: run-time dispatch over memcpy perf test Xiaoyun Li
2017-10-03 14:59 ` [dpdk-dev] [PATCH v5 3/3] efd: run-time dispatch over x86 EFD functions Xiaoyun Li
2017-10-04 17:56 ` [dpdk-dev] [PATCH v5 0/3] run-time Linking support Ananyev, Konstantin
2017-10-04 22:33 ` Li, Xiaoyun
2017-10-04 22:58 ` [dpdk-dev] [PATCH v6 " Xiaoyun Li
2017-10-04 22:58 ` [dpdk-dev] [PATCH v6 1/3] eal/x86: run-time dispatch over memcpy Xiaoyun Li
2017-10-05 9:37 ` Ananyev, Konstantin
2017-10-05 9:38 ` Ananyev, Konstantin
2017-10-05 11:19 ` Li, Xiaoyun
2017-10-05 11:26 ` Richardson, Bruce
2017-10-05 11:26 ` Li, Xiaoyun
2017-10-05 12:12 ` Ananyev, Konstantin
2017-10-04 22:58 ` [dpdk-dev] [PATCH v6 2/3] app/test: run-time dispatch over memcpy perf test Xiaoyun Li
2017-10-04 22:58 ` [dpdk-dev] [PATCH v6 3/3] efd: run-time dispatch over x86 EFD functions Xiaoyun Li
2017-10-05 9:40 ` Ananyev, Konstantin
2017-10-05 10:23 ` Li, Xiaoyun
2017-10-05 12:33 ` [dpdk-dev] [PATCH v7 0/3] run-time Linking support Xiaoyun Li
2017-10-05 12:33 ` [dpdk-dev] [PATCH v7 1/3] eal/x86: run-time dispatch over memcpy Xiaoyun Li
2017-10-09 17:47 ` Thomas Monjalon
2017-10-13 1:06 ` Li, Xiaoyun
2017-10-13 7:21 ` Thomas Monjalon
2017-10-13 7:30 ` Li, Xiaoyun
2017-10-13 7:31 ` Ananyev, Konstantin
2017-10-13 7:36 ` Thomas Monjalon
2017-10-13 7:41 ` Li, Xiaoyun
2017-10-05 12:33 ` [dpdk-dev] [PATCH v7 2/3] app/test: run-time dispatch over memcpy perf test Xiaoyun Li
2017-10-05 12:33 ` [dpdk-dev] [PATCH v7 3/3] efd: run-time dispatch over x86 EFD functions Xiaoyun Li
2017-10-05 13:24 ` [dpdk-dev] [PATCH v7 0/3] run-time Linking support Ananyev, Konstantin
2017-10-09 17:40 ` Thomas Monjalon
2017-10-13 0:58 ` Li, Xiaoyun
2017-10-13 9:01 ` [dpdk-dev] [PATCH v8 " Xiaoyun Li
2017-10-13 9:01 ` [dpdk-dev] [PATCH v8 1/3] eal/x86: run-time dispatch over memcpy Xiaoyun Li
2017-10-13 9:28 ` Thomas Monjalon
2017-10-13 10:26 ` Ananyev, Konstantin
2017-10-17 21:24 ` Thomas Monjalon
2017-10-18 2:21 ` Li, Xiaoyun
2017-10-18 6:22 ` Li, Xiaoyun
2017-10-19 2:45 ` Li, Xiaoyun
2017-10-19 6:58 ` Thomas Monjalon
2017-10-19 7:51 ` Li, Xiaoyun
2017-10-19 8:33 ` Thomas Monjalon
2017-10-19 8:50 ` Li, Xiaoyun
2017-10-19 8:59 ` Ananyev, Konstantin
2017-10-19 9:00 ` Thomas Monjalon
2017-10-19 9:29 ` Bruce Richardson
2017-10-20 1:02 ` Li, Xiaoyun
2017-10-25 6:55 ` Li, Xiaoyun
2017-10-25 7:25 ` Thomas Monjalon
2017-10-29 8:49 ` Thomas Monjalon
2017-11-02 10:22 ` Wang, Zhihong
2017-11-02 10:44 ` Thomas Monjalon
2017-11-02 10:58 ` Li, Xiaoyun
2017-11-02 12:15 ` Thomas Monjalon
2017-11-03 7:47 ` Yao, Lei A
2017-10-25 8:50 ` Ananyev, Konstantin
2017-10-25 8:54 ` Li, Xiaoyun
2017-10-25 9:00 ` Thomas Monjalon
2017-10-25 10:32 ` Li, Xiaoyun
2017-10-25 9:14 ` Ananyev, Konstantin
2017-10-13 9:01 ` [dpdk-dev] [PATCH v8 2/3] app/test: run-time dispatch over memcpy perf test Xiaoyun Li
2017-10-13 9:01 ` [dpdk-dev] [PATCH v8 3/3] efd: run-time dispatch over x86 EFD functions Xiaoyun Li
2017-10-13 13:13 ` [dpdk-dev] [PATCH v8 0/3] run-time Linking support Thomas Monjalon
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