Date: Thu, 9 Nov 2017 23:33:42 +0300 From: Lev Serebryakov <lev@FreeBSD.org> To: Michael Sierchio <kudzu@tenebras.com> Cc: "freebsd-net@freebsd.org" <freebsd-net@freebsd.org>, freebsd-stable <freebsd-stable@freebsd.org> Subject: =?UTF-8?Q?Re:_Intel_I210_=28igb=29_sometimes_consume_all_CPU_on_not?= =?UTF-8?Q?-so-big_traffic_=e2=80=94_need_help!?= Message-ID: <913d5386-9d53-3c32-e109-f7b687b54262@FreeBSD.org> In-Reply-To: <CAHu1Y71VLvgW=GfzQ3M0T7_0og-M=tOdXD5f2zWhCuouvO6uFQ@mail.gmail.com> References: <8590fa5d-fd06-90c6-8d3e-34c155423720@FreeBSD.org> <CAHu1Y71VLvgW=GfzQ3M0T7_0og-M=tOdXD5f2zWhCuouvO6uFQ@mail.gmail.com>
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From: Lev Serebryakov <lev@FreeBSD.org>
Reply-To: lev@FreeBSD.org
To: Michael Sierchio <kudzu@tenebras.com>
Cc: "freebsd-net@freebsd.org" <freebsd-net@freebsd.org>,
freebsd-stable <freebsd-stable@freebsd.org>
Message-ID: <913d5386-9d53-3c32-e109-f7b687b54262@FreeBSD.org>
Subject: =?UTF-8?Q?Re:_Intel_I210_=28igb=29_sometimes_consume_all_CPU_on_not?=
=?UTF-8?Q?-so-big_traffic_=e2=80=94_need_help!?=
References: <8590fa5d-fd06-90c6-8d3e-34c155423720@FreeBSD.org>
<CAHu1Y71VLvgW=GfzQ3M0T7_0og-M=tOdXD5f2zWhCuouvO6uFQ@mail.gmail.com>
In-Reply-To: <CAHu1Y71VLvgW=GfzQ3M0T7_0og-M=tOdXD5f2zWhCuouvO6uFQ@mail.gmail.com>
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On 09.11.2017 23:23, Michael Sierchio wrote:
Nope.
> Is device polling enabled?
>=20
> - M
>=20
> On Thu, Nov 9, 2017 at 12:17 PM, Lev Serebryakov <lev@freebsd.org> wrot=
e:
>=20
>>
>> I still have problems with my E-1220v3 server equipped with Intel I21=
0
>> adapter. It can not be loaded more than 100Mbit/s because it is
>> connection to internet.
>>
>> But sometimes four interrupt threads "intr{irqXXX: igb0:que Y}" consu=
me
>> 100% CPU. Interrupt rate is very modest:
>>
>> % vmstat -i
>> interrupt total rate
>> ...
>> irq276: igb0:que 0 851899713 1193
>> irq277: igb0:que 1 907338150 1271
>> irq278: igb0:que 2 907538207 1271
>> irq279: igb0:que 3 768217584 1076
>> irq280: igb0:link 2 0
>> %
>>
>> But CPU consumption is 90-100% per thread:
>>
>> PID USERNAME PRI NICE SIZE RES STATE C TIME WCPU COMMAND
>> 11 root -92 - 0K 544K CPU2 2 146:22 98.30% intr{irq278:
>> igb0:que 2}
>> 11 root -92 - 0K 544K WAIT 0 178:18 81.55% intr{irq276:
>> igb0:que 0}
>> 11 root -92 - 0K 544K WAIT 1 135:34 77.77% intr{irq277:
>> igb0:que 1}
>> 11 root -92 - 0K 544K CPU3 3 138:57 67.50% intr{irq279:
>> igb0:que 3}
>>
>> procstat -ak looks suspicious:
>>
>> % sudo procstat -ak | grep igb0:que
>> 11 100056 intr irq276: igb0:que 0 vm_page_scan_contig
>> vm_phys_scan_contig vm_page_reclaim_contig kmem_alloc_contig
>> mbuf_jumbo_alloc keg_alloc_slab keg_fetch_slab zone_fetch_slab
>> zone_import zone_alloc_item uma_zalloc_arg m_getjcl igb_refresh_mbufs
>> igb_rxeof igb_msix_que intr_event_execute_handlers ithread_loop fork_e=
xit
>> 11 100058 intr irq277: igb0:que 1 mi_switch ithread_loop fork_ex=
it
>> fork_trampoline
>> 11 100060 intr irq278: igb0:que 2 mi_switch ithread_loop fork_ex=
it
>> fork_trampoline
>> 11 100062 intr irq279: igb0:que 3 mi_switch ithread_loop fork_ex=
it
>> fork_trampoline
>> %
>>
>> --
>> // Lev Serebryakov
>>
>>
>=20
>=20
--=20
// Lev Serebryakov
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