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From: Shanmugasundaram M <shansirtt@gmail.com>
To: dev@dpdk.org
Subject: [dpdk-dev] Reg 6Wind fastpath DPDK 18.11.1 virtual memory allocation ( 54.5GB of anonymous mapping)
Date: Wed, 9 Jun 2021 17:32:25 +0530	[thread overview]
Message-ID: <CALLOm0N8SEedqUXB406xyrGUU8Y_VOS9Hjnr_berNzcZJ3jiCw@mail.gmail.com> (raw)
In-Reply-To: <CALLOm0PKnw7gDP6aHstwBcJf0_ZSC1wKzE-ei9thVWRNkLHGoQ@mail.gmail.com>

 Dear Team,

We are using  6Wind fastpath(fp-rte) which is using DPDK version 18.11.1.
We are seeing  65.5G(preallocated during startup) of virtual memory for
fp-rte on a 32GB machine, 10G of that was huge pages (5000 mappings of 2M.)

We found 4 strange anon (4K size) segments totaling 54.5G (16+16+16+6.5).
Note: we changed / customized memory CONFIG_RTE_MAX_MEMSEG_PER_LIST=24576
and default value of  CONFIG_RTE_MAX_MEMSEG_LISTS=64 used.
Kindly let us know
1. Why are allocating  54.5 GB anonymous mapping
2. When will we use it ?
Appreciate your quick response.

Regards,
Shanmugasundaram M

  parent reply	other threads:[~2021-06-09 12:02 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-09 19:00 [dpdk-dev] Reg DPDK EAL log-level=8 options is not throwing any DEBUG messages in /var/log/messages Shanmugasundaram M
2021-03-09 20:29 ` Stephen Hemminger
2021-03-10 18:19   ` Shanmugasundaram M
2021-03-10 18:25     ` Stephen Hemminger
2021-03-10 18:32       ` Shanmugasundaram M
2021-06-09 12:02 ` Shanmugasundaram M [this message]
2021-06-09 12:28   ` [dpdk-dev] Reg 6Wind fastpath DPDK 18.11.1 virtual memory allocation ( 54.5GB of anonymous mapping) David Marchand
2021-06-09 12:46     ` Bruce Richardson
2021-06-10  7:17       ` Olivier Matz

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