From: "Li, Xiaoyun" <xiaoyun.li@intel.com>
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" <dev@dpdk.org>
Subject: Re: [dpdk-dev] [PATCH v4 3/3] efd: run-time dispatch over x86 EFD functions
Date: Tue, 3 Oct 2017 11:27:51 +0000 [thread overview]
Message-ID: <B9E724F4CB7543449049E7AE7669D82F463E9E@SHSMSX101.ccr.corp.intel.com> (raw)
In-Reply-To: <2601191342CEEE43887BDE71AB9772585FAA35CF@IRSMSX103.ger.corp.intel.com>
OK.
> -----Original Message-----
> From: Ananyev, Konstantin
> Sent: Tuesday, October 3, 2017 19:23
> 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
> Subject: RE: [PATCH v4 3/3] efd: run-time dispatch over x86 EFD functions
>
>
>
> > -----Original Message-----
> > From: Li, Xiaoyun
> > Sent: Tuesday, October 3, 2017 9:15 AM
> > 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
> > Subject: RE: [PATCH v4 3/3] efd: run-time dispatch over x86 EFD
> > functions
> >
> > Hi
> >
> > > -----Original Message-----
> > > From: Ananyev, Konstantin
> > > Sent: Tuesday, October 3, 2017 00:52
> > > 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
> > > Subject: RE: [PATCH v4 3/3] efd: run-time dispatch over x86 EFD
> > > functions
> > >
> > >
> > >
> > > > -----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
> > >
> >
> > Sorry, not quite understand here. So don't need to change codes of efd
> here?
> > I didn't care about the HW. CC_SUPPORT_AVX2 only means the compiler
> supports AVX2 since would runtime selection.
> > The existing codes RTE_MACHINE_CPUFLAG_AVX2 means both the
> compiler and HW supports AVX2.
>
> What I am saying - you don't need all these dances with extra function
> pointer.
> All you need - move efd_lookup_internal_avx2() into a .c file and make sure
> it get compiled with -mavx2 flag.
> Then at rte_efd_create() select AVX2 only when both HW and compiler
> supports AVX2:
>
> ...
> #ifdef CC_SUPPORT_AVX2
> if (RTE_EFD_VALUE_NUM_BITS > 3 &&
> rte_cpu_get_flag_enabled(RTE_CPUFLAG_AVX2))
> table->lookup_fn = EFD_LOOKUP_AVX2;
> else
> #endif
> ...
>
> Konstantin
>
> >
> >
> > Best Regards,
> > Xiaoyun Li
> >
> >
> > > > +}
> > > > +
> > > > +#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:[~2017-10-03 11:27 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
2017-10-03 8:15 ` Li, Xiaoyun
2017-10-03 11:23 ` Ananyev, Konstantin
2017-10-03 11:27 ` Li, Xiaoyun [this message]
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
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=B9E724F4CB7543449049E7AE7669D82F463E9E@SHSMSX101.ccr.corp.intel.com \
--to=xiaoyun.li@intel.com \
--cc=bruce.richardson@intel.com \
--cc=dev@dpdk.org \
--cc=helin.zhang@intel.com \
--cc=konstantin.ananyev@intel.com \
--cc=wenzhuo.lu@intel.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).