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From: 曾懷恩 <the@csie.io>
Cc: users@dpdk.org
Subject: Re: [dpdk-users] DPDK and isolcpus
Date: Fri, 26 Jul 2019 22:50:47 +0800	[thread overview]
Message-ID: <202CB4D5-3F29-44C1-AC0F-BD5AD8C91782@csie.io> (raw)
In-Reply-To: <mailman.1.1564135202.18507.users@dpdk.org>

Hi Filip,

Do you use Mellanox NIC?

In my experience, rte_lcore_count only counts those lcores that are not isolated when using mlx5 driver.

And Intel ixgbe counts lcores correctly even I use isolcpus flag

BR, 

Sent from my iPhone

> From: Filip Janiszewski <contact@filipjaniszewski.com>
> To: "users@dpdk.org" <users@dpdk.org>
> Subject: [dpdk-users] DPDK and isolcpus
> Message-ID:
>    <e98abf2a-b1cf-5fee-7929-778f70390d1d@filipjaniszewski.com>
> Content-Type: text/plain; charset=iso-8859-15
> 
> Hi,
> 
> I've configured a bunch of my box cores with isolcpus and nohz_full in
> the attempt to squeeze a little more performance out of them, but,
> apparently I can't use those core in DPDK anymore as it seems that
> rte_lcore_count reports only core which are not isolated, also I can't
> launch any thread (rte_eal_remote_launch) on those cores.
> 
> In my understanding
> (http://doc.dpdk.org/spp-18.02/setup/performance_opt.html) I should be
> able to "Use the isolcpus Linux kernel parameter to isolate them from
> Linux scheduler to reduce context switches. It prevents workloads of
> other processes than DPDK running on reserved cores with isolcpus
> parameter." but can't make it work.
> 
> Which is the correct way to bind DPDK threads to isolated cpus?
> 
> Thanks
> 
> -- 
> BR, Filip
> +48 666 369 823
> 
> 
> End of users Digest, Vol 196, Issue 5
> *************************************

       reply	other threads:[~2019-07-26 14:50 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <mailman.1.1564135202.18507.users@dpdk.org>
2019-07-26 14:50 ` 曾懷恩 [this message]
2019-07-26 14:56   ` Stephen Hemminger
2019-07-26 14:56 曾懷恩
  -- strict thread matches above, loose matches on Subject: below --
2019-07-26  6:17 Filip Janiszewski

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