From: Shirley Avishour <shirley@imvisiontech.com>
To: Rami Rosen <ramirose@gmail.com>
Cc: dev@dpdk.org
Subject: Re: [dpdk-dev] running dpdk application on the same machine with other none dpdk application
Date: Wed, 30 Jan 2019 09:05:06 +0200 [thread overview]
Message-ID: <CACn717hy2uAJ1mV-UHLtm1cTvsvYdHe_v_Xs=sUu+TVhsZF=5Q@mail.gmail.com> (raw)
In-Reply-To: <CAHLOa7SOjF+kGy5QcKPJjGHrprvdEj-RCMESsLJv=c+JNbMGCw@mail.gmail.com>
Hi Rami,
This is the printout for cat /proc/cmdline
BOOT_IMAGE=/boot/vmlinuz-4.15.0-43-generic
root=UUID=6f1a210b-a30f-456d-bf16-bbb210da5666 ro default_hugepagesz=2M
hugepagesz=2M hugepages=4096 isolcpus=1-5 nohz_full=1-5 rcu_nocbs=1-5
The requires cpus are in fact isolated but jvm generate some kernel threads
as well and I'm afraid that these kernel space threads eventually use all
cores. isolcpus is not applies on kernel space threads.
Shirley.
On Wed, Jan 30, 2019 at 8:57 AM Rami Rosen <ramirose@gmail.com> wrote:
> Hi Shirley,
> >Running java based applications on the same server with a dpdk based
> application has an impact on the dpdk performance.
> Probably since the JVM generates kernel based processes. I
>
> This is true, but as far as I know, using isolcpus should prevent these
> processes to run on the isolated cores.
>
> Just to be on the safe side: did you make sure with cat /proc/cmdline on
> the kernel you are actually running indeed
> has the "isolcpus=1-5" you added in grub ? sometimes, especially in multi
> OS hosts, adding entries in /etc/default/grub and running grub2-mkconfig is
> not enough, if you boot from a different partition.
>
> Regards,
> Rami Rosen
>
>
>
next prev parent reply other threads:[~2019-01-30 7:05 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-29 16:32 Shirley Avishour
2019-01-30 6:09 ` Rami Rosen
2019-01-30 6:31 ` Shirley Avishour
2019-01-30 6:57 ` Rami Rosen
2019-01-30 7:05 ` Shirley Avishour [this message]
2019-01-30 7:26 ` Rami Rosen
2019-01-30 7:47 ` Shirley Avishour
2019-01-30 8:18 ` Rami Rosen
2019-01-30 8:27 ` Shirley Avishour
2019-01-30 8:30 ` Shirley Avishour
2019-01-30 8:40 ` Rami Rosen
2019-01-30 8:45 ` Shirley Avishour
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