[dpdk-dev] [PATCH 18.05 v4] eal: add function to return number of detected sockets
Burakov, Anatoly
anatoly.burakov at intel.com
Thu Mar 8 15:38:37 CET 2018
On 08-Mar-18 12:12 PM, Bruce Richardson wrote:
> On Wed, Feb 07, 2018 at 09:58:36AM +0000, Anatoly Burakov wrote:
>> During lcore scan, find maximum socket ID and store it. This will
>> break the ABI, so bump ABI version.
>>
>> Signed-off-by: Anatoly Burakov <anatoly.burakov at intel.com>
>> ---
>>
>> Notes:
>> v4:
>> - Remove backwards ABI compatibility, bump ABI instead
>>
>> v3:
>> - Added ABI compatibility
>>
>> v2:
>> - checkpatch changes
>> - check socket before deciding if the core is not to be used
>>
>> lib/librte_eal/bsdapp/eal/Makefile | 2 +-
>> lib/librte_eal/common/eal_common_lcore.c | 37 +++++++++++++++++++++----------
>> lib/librte_eal/common/include/rte_eal.h | 1 +
>> lib/librte_eal/common/include/rte_lcore.h | 8 +++++++
>> lib/librte_eal/linuxapp/eal/Makefile | 2 +-
>> lib/librte_eal/rte_eal_version.map | 9 +++++++-
>> 6 files changed, 44 insertions(+), 15 deletions(-)
>>
> Breaking the ABI is the best way to implement this change, and given the
> deprecation was previously announced I'm ok with that.
>
> Question: we are ok assuming that the socket numbers are sequential, or
> nearly so, and knowing the maximum socket number seen is a good
> approximation of the actual physical sockets? I know in terms of cores
> on a system, the core id's often jump - are there systems where the
> socket numbers do too?
>
> /Bruce
>
I am not aware of any system that would jump sockets like that. I'm open
to corrections, however :)
--
Thanks,
Anatoly
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