From: David Marchand <david.marchand@redhat.com>
To: Balaji K N <balaji.k.n@ericsson.com>
Cc: "dev@dpdk.org" <dev@dpdk.org>
Subject: Re: [dpdk-dev] long initialization time for EAL init
Date: Wed, 29 Jul 2020 10:52:52 +0200 [thread overview]
Message-ID: <CAJFAV8yMWBUQLoS-cHEL8jdBz=DYBYRKFkt4z3HUzZvTNpJY0Q@mail.gmail.com> (raw)
In-Reply-To: <AM0PR07MB64366C460276BA516177F58BA1730@AM0PR07MB6436.eurprd07.prod.outlook.com>
On Wed, Jul 29, 2020 at 10:51 AM Balaji K N <balaji.k.n@ericsson.com> wrote:
> We are using OVS 2.12.0 with DPDK 18.11.2 release on Ubuntu 16.04 LTS. We do observe long initialization time for EAL init ( ~10 seconds for EAL memory initialization).
>
> Below is our hardware and memory configuration
> Hardware : Dell Server
> Sockets(NUMA) : 2
> CPUs : Each NUMA with 10 CPUs (Intel(R) Xeon(R) CPU E5-2660 v2 @ 2.20GHz)
> RAM : 128 GB
> Hugepages reserverd : 2048 huge pages of 2MB and 100 Huge pages of 1G (reserved during boot time). We are using only 2MB huge pages for OVS process.
> NIC : Ethernet 10G 2P X520 ( ixgbe driver )
>
> Passing below EAL arguments with OVS process.
> 2020-07-23T09:46:58.878Z|00014|dpdk|INFO|EAL ARGS: ovs-vswitchd -w 0000:04:00.0,support-multi-driver=1 -w 0000:42:00.0,support-multi-driver=1 -c 0x1 --huge-dir /mnt/huge_ovs_2M --socket-mem 2048,2048 --socket-limit 2048,2048.
>
> We debugged further in DPDK and found out that mmap called in eal_get_virtual_area is taking more time ( rte_eal_init-> rte_eal_memory_init -> rte_eal_memseg_init -> memseg_primary_init -> alloc_va_space -> eal_get_virtual_area ->mmap ). Long initialization time is noticeable difference compared to prior release. Any pointers would be helpful.
Did you try to start ovs with the --no-mlockall option?
--
David Marchand
next prev parent reply other threads:[~2020-07-29 8:53 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-28 15:56 Balaji K N
2020-07-29 8:52 ` David Marchand [this message]
2020-07-29 9:07 ` Burakov, Anatoly
2020-07-29 9:56 ` Balaji K N
2020-07-29 10:02 ` David Marchand
2020-07-28 17:58 Anil Kumar Koli
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