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From: Yongseok Koh <yskoh@mellanox.com>
To: Pavan Nikhilesh Bhagavatula <pbhagavatula@marvell.com>
Cc: Thomas Monjalon <thomas@monjalon.net>, dev <dev@dpdk.org>,
	Jerin Jacob Kollanukkaran <jerinj@marvell.com>,
	"jerinjacobk@gmail.com" <jerinjacobk@gmail.com>
Subject: Re: [dpdk-dev] [PATCH v8 2/4] meson: add infra to support machine specific flags
Date: Thu, 11 Apr 2019 20:12:09 +0000	[thread overview]
Message-ID: <C4F41778-F0F3-49A5-8472-E307FF57BFFB@mellanox.com> (raw)
Message-ID: <20190411201209.PIVgfZFeyykEUdmjidOjtPH6I5cWOcj5Gj5jAoNYlss@z> (raw)
In-Reply-To: <CY4PR1801MB186361CD95AF5D519FBF93F5DE2F0@CY4PR1801MB1863.namprd18.prod.outlook.com>


> On Apr 10, 2019, at 11:07 PM, Pavan Nikhilesh Bhagavatula <pbhagavatula@marvell.com> wrote:
> 
> Hi Yongseok,
> 
>> -----Original Message-----
>> From: Yongseok Koh <yskoh@mellanox.com>
>> Sent: Wednesday, April 10, 2019 11:08 PM
>> To: Pavan Nikhilesh Bhagavatula <pbhagavatula@marvell.com>
>> Cc: Thomas Monjalon <thomas@monjalon.net>; dev <dev@dpdk.org>; Jerin
>> Jacob Kollanukkaran <jerinj@marvell.com>; jerinjacobk@gmail.com
>> Subject: [EXT] Re: [dpdk-dev] [PATCH v8 2/4] meson: add infra to support
>> machine specific flags
>> 
>> External Email
>> 
>> ----------------------------------------------------------------------
>> 
>>> On Apr 10, 2019, at 9:13 AM, jerinjacobk@gmail.com wrote:
>>> 
>>> From: Pavan Nikhilesh <pbhagavatula@marvell.com>
>>> 
>>> Currently, RTE_* flags are set based on the implementer ID but there
>>> might be some micro arch specific differences from the same vendor eg.
>>> CACHE_LINESIZE. Add support to set micro arch specific flags.
>>> 
>>> Signed-off-by: Pavan Nikhilesh <pbhagavatula@marvell.com>
>>> Signed-off-by: Jerin Jacob <jerinj@marvell.com>
>>> ---
>>> config/arm/meson.build | 56 ++++++++++++++++++++++++------------------
>>> 1 file changed, 32 insertions(+), 24 deletions(-)
>>> 
>>> diff --git a/config/arm/meson.build b/config/arm/meson.build index
>>> 170a4981a..24bce2b39 100644
>>> --- a/config/arm/meson.build
>>> +++ b/config/arm/meson.build
>>> @@ -7,25 +7,6 @@ march_opt = '-march=@0@'.format(machine)
>>> 
>>> arm_force_native_march = false
>>> 
>>> -machine_args_generic = [
>>> -	['default', ['-march=armv8-a+crc+crypto']],
>>> -	['native', ['-march=native']],
>>> -	['0xd03', ['-mcpu=cortex-a53']],
>>> -	['0xd04', ['-mcpu=cortex-a35']],
>>> -	['0xd05', ['-mcpu=cortex-a55']],
>>> -	['0xd07', ['-mcpu=cortex-a57']],
>>> -	['0xd08', ['-mcpu=cortex-a72']],
>>> -	['0xd09', ['-mcpu=cortex-a73']],
>>> -	['0xd0a', ['-mcpu=cortex-a75']],
>>> -	['0xd0b', ['-mcpu=cortex-a76']],
>>> -]
>>> -machine_args_cavium = [
>>> -	['default', ['-march=armv8-a+crc+crypto','-mcpu=thunderx']],
>>> -	['native', ['-march=native']],
>>> -	['0xa1', ['-mcpu=thunderxt88']],
>>> -	['0xa2', ['-mcpu=thunderxt81']],
>>> -	['0xa3', ['-mcpu=thunderxt83']]]
>>> -
>>> flags_common_default = [
>>> 	# Accelarate rte_memcpy. Be sure to run unit test
>> (memcpy_perf_autotest)
>>> 	# to determine the best threshold in code. Refer to notes in source
>>> file @@ -52,12 +33,10 @@ flags_generic = [
>>> 	['RTE_USE_C11_MEM_MODEL', true],
>>> 	['RTE_CACHE_LINE_SIZE', 128]]
>>> flags_cavium = [
>>> -	['RTE_MACHINE', '"thunderx"'],
>>> 	['RTE_CACHE_LINE_SIZE', 128],
>>> 	['RTE_MAX_NUMA_NODES', 2],
>>> 	['RTE_MAX_LCORE', 96],
>>> -	['RTE_MAX_VFIO_GROUPS', 128],
>>> -	['RTE_USE_C11_MEM_MODEL', false]]
>>> +	['RTE_MAX_VFIO_GROUPS', 128]]
>>> flags_dpaa = [
>>> 	['RTE_MACHINE', '"dpaa"'],
>>> 	['RTE_USE_C11_MEM_MODEL', true],
>>> @@ -71,6 +50,27 @@ flags_dpaa2 = [
>>> 	['RTE_MAX_NUMA_NODES', 1],
>>> 	['RTE_MAX_LCORE', 16],
>>> 	['RTE_LIBRTE_DPAA2_USE_PHYS_IOVA', false]]
>>> +flags_default_extra = []
>>> +flags_thunderx_extra = [
>>> +	['RTE_MACHINE', '"thunderx"'],
>>> +	['RTE_USE_C11_MEM_MODEL', false]]
>>> +
>>> +machine_args_generic = [
>>> +	['default', ['-march=armv8-a+crc+crypto']],
>>> +	['native', ['-march=native']],
>>> +	['0xd03', ['-mcpu=cortex-a53']],
>>> +	['0xd04', ['-mcpu=cortex-a35']],
>>> +	['0xd07', ['-mcpu=cortex-a57']],
>>> +	['0xd08', ['-mcpu=cortex-a72']],
>>> +	['0xd09', ['-mcpu=cortex-a73']],
>>> +	['0xd0a', ['-mcpu=cortex-a75']]]
>>> +
>>> +machine_args_cavium = [
>>> +	['default', ['-march=armv8-a+crc+crypto','-mcpu=thunderx']],
>>> +	['native', ['-march=native']],
>>> +	['0xa1', ['-mcpu=thunderxt88'], flags_thunderx_extra],
>>> +	['0xa2', ['-mcpu=thunderxt81'], flags_thunderx_extra],
>>> +	['0xa3', ['-mcpu=thunderxt83'], flags_thunderx_extra]]
>>> 
>>> ## Arm implementer ID (ARM DDI 0487C.a, Section G7.2.106, Page
>>> G7-5321) impl_generic = ['Generic armv8', flags_generic,
>>> machine_args_generic] @@ -157,8 +157,16 @@ else
>>> 	endif
>>> 	foreach marg: machine[2]
>>> 		if marg[0] == impl_pn
>>> -			foreach f: marg[1]
>>> -				machine_args += f
>>> +			foreach flag: marg[1]
>>> +				if cc.has_argument(flag)
>>> +					machine_args += flag
>>> +				endif
>>> +			endforeach
>>> +			# Apply any extra machine specific flags.
>>> +			foreach flag: marg.get(2, flags_default_extra)
>>> +				if flag.length() > 0
>>> +					dpdk_conf.set(flag[0], flag[1])
>>> +				endif
>> 
>> Let me continue the discussion from v7 here.
>> Seems I wan't clear enough.
>> 
>> Let me take an example. If the host is thunderx2 (0xaf) and compiler is older
>> than v7, flags_thunderx2_extra isn't set. This means, for example,
>> RTE_CACHE_LINE_SIZE will still be 128. Is that what you want?
>> RTE_CACHE_LINE_SIZE has nothing to do with compiler support and you might
>> want to set it regardless of gcc version. You could skip setting -mcpu with setting
>> the extra flags.
>> 
> 
> Thanks for the detailed explanation.
> I think since we have the check to skip mcpu flag when cc doesn't support it (cc.has_argument(flag))
> It will be safe to remove 
> `
>        # Primary part number based mcpu flags are supported
>        # for gcc versions > 7
>        if cc.version().version_compare(
>                        '<7.0') or cmd_output.length() == 0
>                if not meson.is_cross_build() and arm_force_native_march == true
>                        impl_pn = 'native'
>                else
>                        impl_pn = 'default'
>                endif
>        endif
> `

+1

> 
> The command output check can also be removed as it is handled when calling the command script itself.

+1

> 
> Thoughts?
> 
> PS. I think the safest way to set CACHELINE_SIZE is to read the cache type register[1] but sadly only few latest kernels 
> have the support through sysfs (/sys/devices/system/cpu/cpu0/cache/index0/coherency_line_size) 

+1

In summary, +3. LoL

I'll also submit a patch to change the default cacheline size of cortex-a72 with the new flags_*_extra[]


thanks,
Yongseok

  parent reply	other threads:[~2019-04-11 20:12 UTC|newest]

Thread overview: 154+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-01-06 13:20 [dpdk-dev] [PATCH 1/3] mk: introduce helper to check valid compiler argument Jerin Jacob Kollanukkaran
2019-01-06 13:20 ` [dpdk-dev] [PATCH 2/3] config: add thunderx2 machine config Jerin Jacob Kollanukkaran
2019-01-06 20:56   ` Thomas Monjalon
2019-01-07  5:27     ` [dpdk-dev] [EXT] " Jerin Jacob Kollanukkaran
2019-01-07  0:21   ` [dpdk-dev] " Gavin Hu (Arm Technology China)
2019-01-07  5:29     ` [dpdk-dev] [EXT] " Jerin Jacob Kollanukkaran
2019-01-06 13:20 ` [dpdk-dev] [PATCH 3/3] config: add octeontx2 " Jerin Jacob Kollanukkaran
2019-01-07 15:42 ` [dpdk-dev] [PATCH v2 1/6] mk: introduce helper to check valid compiler argument Pavan Nikhilesh Bhagavatula
2019-01-07 15:42   ` [dpdk-dev] [PATCH v2 2/6] config: add thunderx2 machine config Pavan Nikhilesh Bhagavatula
2019-01-07 15:42   ` [dpdk-dev] [PATCH v2 3/6] config: add octeontx2 " Pavan Nikhilesh Bhagavatula
2019-01-07 15:42   ` [dpdk-dev] [PATCH v2 4/6] meson: add infra to support machine specific flags Pavan Nikhilesh Bhagavatula
2019-01-07 15:42   ` [dpdk-dev] [PATCH v2 5/6] meson: add thunderx2 machine config Pavan Nikhilesh Bhagavatula
2019-01-07 16:57     ` Thomas Monjalon
2019-01-07 15:42   ` [dpdk-dev] [PATCH v2 6/6] meson: add octeontx2 " Pavan Nikhilesh Bhagavatula
2019-01-09 10:19 ` [dpdk-dev] [PATCH v3 1/4] mk: introduce helper to check valid compiler argument Pavan Nikhilesh Bhagavatula
2019-01-09 10:19   ` [dpdk-dev] [PATCH v3 2/4] meson: add infra to support machine specific flags Pavan Nikhilesh Bhagavatula
2019-01-09 10:19   ` [dpdk-dev] [PATCH v3 3/4] config: add thunderx2 machine config Pavan Nikhilesh Bhagavatula
2019-01-09 10:19   ` [dpdk-dev] [PATCH v3 4/4] config: add octeontx2 " Pavan Nikhilesh Bhagavatula
2019-01-09 10:19   ` [dpdk-dev] [PATCH v3 5/5] meson: add cross build targets for thunderx2 and octeontx2 Pavan Nikhilesh Bhagavatula
2019-01-09 10:39 ` [dpdk-dev] [PATCH v4 1/5] mk: introduce helper to check valid compiler argument Pavan Nikhilesh Bhagavatula
2019-01-09 10:39   ` [dpdk-dev] [PATCH v4 2/5] meson: add infra to support machine specific flags Pavan Nikhilesh Bhagavatula
2019-01-14 11:32     ` Thomas Monjalon
2019-02-12  8:06     ` Phil Yang (Arm Technology China)
2019-02-12  8:35       ` [dpdk-dev] [EXT] " Pavan Nikhilesh Bhagavatula
2019-01-09 10:39   ` [dpdk-dev] [PATCH v4 3/5] config: add thunderx2 machine config Pavan Nikhilesh Bhagavatula
2019-01-09 10:39   ` [dpdk-dev] [PATCH v4 4/5] config: add octeontx2 " Pavan Nikhilesh Bhagavatula
2019-02-12  8:50     ` Phil Yang (Arm Technology China)
2019-01-09 10:39   ` [dpdk-dev] [PATCH v4 5/5] meson: add cross build targets for thunderx2 and octeontx2 Pavan Nikhilesh Bhagavatula
2019-01-14 11:28     ` Thomas Monjalon
2019-01-14 11:35   ` [dpdk-dev] [PATCH v4 1/5] mk: introduce helper to check valid compiler argument Thomas Monjalon
2019-01-14 11:56     ` [dpdk-dev] [EXT] " Jerin Jacob Kollanukkaran
2019-01-14 12:08       ` Thomas Monjalon
2019-02-24 18:11   ` [dpdk-dev] [PATCH v5 1/4] " Jerin Jacob Kollanukkaran
2019-02-24 18:11     ` [dpdk-dev] [PATCH v5 2/4] meson: add infra to support machine specific flags Jerin Jacob Kollanukkaran
2019-02-24 18:11     ` [dpdk-dev] [PATCH v5 3/4] config: add thunderx2 machine config Jerin Jacob Kollanukkaran
2019-02-24 18:11     ` [dpdk-dev] [PATCH v5 4/4] config: add octeontx2 " Jerin Jacob Kollanukkaran
2019-03-18 16:50     ` [dpdk-dev] [PATCH v6 1/4] mk: introduce helper to check valid compiler argument Jerin Jacob Kollanukkaran
2019-03-18 16:50       ` Jerin Jacob Kollanukkaran
2019-03-18 16:50       ` [dpdk-dev] [PATCH v6 2/4] meson: add infra to support machine specific flags Jerin Jacob Kollanukkaran
2019-03-18 16:50         ` Jerin Jacob Kollanukkaran
2019-03-19  9:40         ` Bruce Richardson
2019-03-19  9:40           ` Bruce Richardson
2019-03-29 13:57           ` Thomas Monjalon
2019-03-29 13:57             ` Thomas Monjalon
2019-03-18 16:50       ` [dpdk-dev] [PATCH v6 3/4] config: add thunderx2 machine config Jerin Jacob Kollanukkaran
2019-03-18 16:50         ` Jerin Jacob Kollanukkaran
2019-04-02  8:52         ` Gavin Hu (Arm Technology China)
2019-04-02  8:52           ` Gavin Hu (Arm Technology China)
2019-04-05 18:13         ` Thomas Monjalon
2019-04-05 18:13           ` Thomas Monjalon
2019-04-05 18:47           ` Jerin Jacob Kollanukkaran
2019-04-05 18:47             ` Jerin Jacob Kollanukkaran
2019-04-05 19:09             ` Thomas Monjalon
2019-04-05 19:09               ` Thomas Monjalon
2019-04-06 11:40               ` Jerin Jacob Kollanukkaran
2019-04-06 11:40                 ` Jerin Jacob Kollanukkaran
2019-03-18 16:50       ` [dpdk-dev] [PATCH v6 4/4] config: add octeontx2 " Jerin Jacob Kollanukkaran
2019-03-18 16:50         ` Jerin Jacob Kollanukkaran
2019-04-02  8:54         ` Gavin Hu (Arm Technology China)
2019-04-02  8:54           ` Gavin Hu (Arm Technology China)
2019-04-06 14:27       ` [dpdk-dev] [PATCH v7 1/4] mk: introduce helper to check valid compiler argument jerinjacobk
2019-04-06 14:27         ` jerinjacobk
2019-04-06 14:27         ` [dpdk-dev] [PATCH v7 2/4] meson: add infra to support machine specific flags jerinjacobk
2019-04-06 14:27           ` jerinjacobk
2019-04-10  0:40           ` Yongseok Koh
2019-04-10  0:40             ` Yongseok Koh
2019-04-10  2:15             ` Yongseok Koh
2019-04-10  2:15               ` Yongseok Koh
2019-04-10 14:22               ` Pavan Nikhilesh Bhagavatula
2019-04-10 14:22                 ` Pavan Nikhilesh Bhagavatula
2019-04-06 14:27         ` [dpdk-dev] [PATCH v7 3/4] config: add thunderx2 machine config jerinjacobk
2019-04-06 14:27           ` jerinjacobk
2019-04-08 10:32           ` Thomas Monjalon
2019-04-08 10:32             ` Thomas Monjalon
2019-04-08 12:05             ` Thomas Monjalon
2019-04-08 12:05               ` Thomas Monjalon
2019-04-08 12:11               ` Bruce Richardson
2019-04-08 12:11                 ` Bruce Richardson
2019-04-06 14:27         ` [dpdk-dev] [PATCH v7 4/4] config: add octeontx2 " jerinjacobk
2019-04-06 14:27           ` jerinjacobk
2019-04-10 12:48           ` Thomas Monjalon
2019-04-10 12:48             ` Thomas Monjalon
2019-04-10 12:59             ` Jerin Jacob Kollanukkaran
2019-04-10 12:59               ` Jerin Jacob Kollanukkaran
2019-04-10 16:13         ` [dpdk-dev] [PATCH v8 1/4] mk: introduce helper to check valid compiler argument jerinjacobk
2019-04-10 16:13           ` jerinjacobk
2019-04-10 16:13           ` [dpdk-dev] [PATCH v8 2/4] meson: add infra to support machine specific flags jerinjacobk
2019-04-10 16:13             ` jerinjacobk
2019-04-10 17:37             ` Yongseok Koh
2019-04-10 17:37               ` Yongseok Koh
2019-04-11  6:07               ` Pavan Nikhilesh Bhagavatula
2019-04-11  6:07                 ` Pavan Nikhilesh Bhagavatula
2019-04-11 20:12                 ` Yongseok Koh [this message]
2019-04-11 20:12                   ` Yongseok Koh
2019-04-12  2:04                   ` Yongseok Koh
2019-04-12  2:04                     ` Yongseok Koh
2019-04-12  6:07                     ` Jerin Jacob Kollanukkaran
2019-04-12  6:07                       ` Jerin Jacob Kollanukkaran
2019-04-12  6:43                       ` Yongseok Koh
2019-04-12  6:43                         ` Yongseok Koh
2019-04-12  7:00                         ` Jerin Jacob Kollanukkaran
2019-04-12  7:00                           ` Jerin Jacob Kollanukkaran
2019-04-12  7:34                           ` Yongseok Koh
2019-04-12  7:34                             ` Yongseok Koh
2019-04-12  7:09                         ` Yongseok Koh
2019-04-12  7:09                           ` Yongseok Koh
2019-04-12  7:35                           ` Jerin Jacob Kollanukkaran
2019-04-12  7:35                             ` Jerin Jacob Kollanukkaran
2019-04-12  7:47                             ` Yongseok Koh
2019-04-12  7:47                               ` Yongseok Koh
2019-04-11 23:37             ` Thomas Monjalon
2019-04-11 23:37               ` Thomas Monjalon
2019-04-12  1:59               ` Yongseok Koh
2019-04-12  1:59                 ` Yongseok Koh
2019-04-12  7:12               ` Jerin Jacob Kollanukkaran
2019-04-12  7:12                 ` Jerin Jacob Kollanukkaran
2019-04-12  8:45                 ` Thomas Monjalon
2019-04-12  8:45                   ` Thomas Monjalon
2019-04-13  6:24                   ` Jerin Jacob Kollanukkaran
2019-04-13  6:24                     ` Jerin Jacob Kollanukkaran
2019-04-13 20:42                     ` Thomas Monjalon
2019-04-13 20:42                       ` Thomas Monjalon
2019-04-14 14:40                       ` Pavan Nikhilesh Bhagavatula
2019-04-14 14:40                         ` Pavan Nikhilesh Bhagavatula
2019-04-14 17:44                         ` Thomas Monjalon
2019-04-14 17:44                           ` Thomas Monjalon
2019-04-14 18:19                           ` Jerin Jacob Kollanukkaran
2019-04-14 18:19                             ` Jerin Jacob Kollanukkaran
2019-04-14 18:29                             ` Thomas Monjalon
2019-04-14 18:29                               ` Thomas Monjalon
2019-04-10 16:13           ` [dpdk-dev] [PATCH v8 3/4] config: add thunderx2 machine config jerinjacobk
2019-04-10 16:13             ` jerinjacobk
2019-04-10 16:14           ` [dpdk-dev] [PATCH v8 4/4] config: add octeontx2 " jerinjacobk
2019-04-10 16:14             ` jerinjacobk
2019-04-13 19:01           ` [dpdk-dev] [PATCH v9 1/4] mk: introduce helper to check valid compiler argument jerinj
2019-04-13 19:01             ` jerinj
2019-04-13 19:01             ` [dpdk-dev] [PATCH v9 2/4] meson: add infra to support machine specific flags jerinj
2019-04-13 19:01               ` jerinj
2019-04-13 19:01             ` [dpdk-dev] [PATCH v9 3/4] config: add thunderx2 machine config jerinj
2019-04-13 19:01               ` jerinj
2019-04-13 19:01             ` [dpdk-dev] [PATCH v9 4/4] config: add octeontx2 " jerinj
2019-04-13 19:01               ` jerinj
2019-04-13 20:19             ` [dpdk-dev] [PATCH v10 1/4] mk: introduce helper to check valid compiler argument jerinj
2019-04-13 20:19               ` jerinj
2019-04-13 20:19               ` [dpdk-dev] [PATCH v10 2/4] meson: add infra to support machine specific flags jerinj
2019-04-13 20:19                 ` jerinj
2019-04-13 20:19               ` [dpdk-dev] [PATCH v10 3/4] config: add thunderx2 machine config jerinj
2019-04-13 20:19                 ` jerinj
2019-04-13 20:19               ` [dpdk-dev] [PATCH v10 4/4] config: add octeontx2 " jerinj
2019-04-13 20:19                 ` jerinj
2019-04-15 21:00               ` [dpdk-dev] [PATCH v10 1/4] mk: introduce helper to check valid compiler argument Thomas Monjalon
2019-04-15 21:00                 ` Thomas Monjalon
2019-03-21 10:13     ` [dpdk-dev] [PATCH v5 " Phil Yang (Arm Technology China)
2019-03-21 10:13       ` Phil Yang (Arm Technology China)

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