From: "Burakov, Anatoly" <anatoly.burakov@intel.com>
To: "Burakov, Anatoly" <anatoly.burakov@intel.com>,
David Marchand <david.marchand@6wind.com>,
"dev@dpdk.org" <dev@dpdk.org>
Subject: Re: [dpdk-dev] [PATCH RFC] eal: change default per socket memory allocation
Date: Fri, 2 May 2014 08:54:24 +0000 [thread overview]
Message-ID: <C6ECDF3AB251BE4894318F4E45123697592AB0F9@IRSMSX101.ger.corp.intel.com> (raw)
In-Reply-To: <C6ECDF3AB251BE4894318F4E45123697592AAF93@IRSMSX101.ger.corp.intel.com>
Hi again David/Didier,
> Can I suggest to do an RTE_MAX between (internal_config.memory -
> total_mem) and (internal_config.memory * cpu_per_socket[socket_id] +
> rte_lcore_count() - 1) / rte_lcore_count() ? I don't think it's a good idea to go
> over the requested amount. Let the last core have a chance of reserving
> slightly less memory than other cores, but don't let it go over the limit. If
> specific memory constraints are required, let the user use --socket-mem
> instead.
Sorry for spamming, but now that I think of it, I don't believe this change makes much sense. If the user wants memory on specific sockets, there's already --socket-mem option. If the user doesn't care, there's -m option, which gives the user memory from whatever sockets it is available. With this change applied, DPDK will fail when run with -m switch under certain circumstances (e.g. cores from socket 0 present in the coremask but no memory left on socket 0), which is quite the opposite of a simple "give me n megs, I don't care where it comes from" option -m is providing.
Best regards,
Anatoly Burakov
DPDK SW Engineer
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next prev parent reply other threads:[~2014-05-02 8:54 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-04-30 14:15 David Marchand
2014-05-01 16:06 ` Burakov, Anatoly
2014-05-02 8:54 ` Burakov, Anatoly [this message]
2014-05-02 9:05 ` Venkatesan, Venky
2014-05-05 9:26 ` David Marchand
2014-05-06 10:05 ` Burakov, Anatoly
2014-05-06 15:18 ` Thomas Monjalon
2014-05-06 15:56 ` Burakov, Anatoly
2014-05-07 14:56 ` Venkatesan, Venky
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