>>At least at first glance it doesn't look like it's enabled on either our
>>RHEL7 or Ubuntu nodes. No numad running either.
Do you have disable autonuma balancing manually ?
because look at kernel config of both rhel7 and ubuntu, it's really seem to be
enabled by default:
CONFIG_ARCH_SUPPORTS_NUMA_BALANCING=y
CONFIG_NUMA_BALANCING_DEFAULT_ENABLED=y
CONFIG_NUMA_BALANCING=y
>>No numad running either.
AFAIK, numad was used by RHEL6, and auto-numabalancing is used since RHEL7.
One Other thing you could also check, is if transparent hugepages is enabled or
not.
It's known to slowdown some applications, like databases for example. (So maybe
memstore too)
#cat /sys/kernel/mm/transparent_hugepage/enabled
always madvise [never]
----- Mail original -----
De: "Mark Nelson" <[email protected]>
À: "aderumier" <[email protected]>
Cc: "Blair Bethwaite" <[email protected]>, "James Page"
<[email protected]>, "ceph-devel" <[email protected]>, "Stephen L
Blinick" <[email protected]>, "Jay Vosburgh"
<[email protected]>, "Colin Ian King" <[email protected]>,
"Patricia Gaughen" <[email protected]>, "Leann Ogasawara"
<[email protected]>
Envoyé: Vendredi 20 Février 2015 17:12:46
Objet: Re: Memstore performance improvements v0.90 vs v0.87
On 02/20/2015 10:03 AM, Alexandre DERUMIER wrote:
>>> http://rhelblog.redhat.com/2015/01/12/mysteries-of-numa-memory-management-revealed/
>>>
>>> It's possible that this could be having an effect on the results.
>
> Isn't auto numa balancing enabled by default since kernel 3.8 ?
No idea, I'm behind the times on what's been going on with numa tuning.
>
> it can be checked with
>
> cat /proc/sys/kernel/numa_balancing
At least at first glance it doesn't look like it's enabled on either our
RHEL7 or Ubuntu nodes. No numad running either.
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