From: "shesha Sreenivasamurthy (shesha)" <shesha@cisco.com>
To: "shesha Sreenivasamurthy (shesha)" <shesha@cisco.com>,
"dev@dpdk.org" <dev@dpdk.org>
Subject: Re: [dpdk-dev] Unlinking hugepage backing file after initialiation
Date: Tue, 29 Sep 2015 00:24:10 +0000 [thread overview]
Message-ID: <D22F275D.221A0%shesha@cisco.com> (raw)
Additional info:
Before staring Application:
-------------------------------------
cat /sys/devices/system/node/node*/meminfo | grep HugePages_
Node 0 HugePages_Total: 2048
Node 0 HugePages_Free: 2048
Node 0 HugePages_Surp: 0
Node 1 HugePages_Total: 2048
Node 1 HugePages_Free: 2048
Node 1 HugePages_Surp: 0
While application is running:
-------------------------------------
cat /sys/devices/system/node/node*/meminfo | grep HugePages_
Node 0 HugePages_Total: 2048
Node 0 HugePages_Free: 1536
Node 0 HugePages_Surp: 0
Node 1 HugePages_Total: 2048
Node 1 HugePages_Free: 1536
Node 1 HugePages_Surp: 0
After Application is stopped:
-------------------------------------
cat /sys/devices/system/node/node*/meminfo | grep HugePages_
Node 0 HugePages_Total: 2048
Node 0 HugePages_Free: 1536
Node 0 HugePages_Surp: 0
Node 1 HugePages_Total: 2048
Node 1 HugePages_Free: 1536
Node 1 HugePages_Surp: 0
With UNLINKING in eal_memory.c::rte_eal_hugepage_init() and after application is stopped:
------------------------------------------------------------
cat /sys/devices/system/node/node*/meminfo | grep HugePages_
Node 0 HugePages_Total: 2048
Node 0 HugePages_Free: 2048
Node 0 HugePages_Surp: 0
Node 1 HugePages_Total: 2048
Node 1 HugePages_Free: 2048
Node 1 HugePages_Surp: 0
--
- Thanks
char * (*shesha) (uint64_t cache, uint8_t F00D)
{ return 0x0000C0DE; }
From: dev <dev-bounces@dpdk.org<mailto:dev-bounces@dpdk.org>> on behalf of Cisco Employee <shesha@cisco.com<mailto:shesha@cisco.com>>
Date: Monday, September 28, 2015 at 5:04 PM
To: "dev@dpdk.org<mailto:dev@dpdk.org>" <dev@dpdk.org<mailto:dev@dpdk.org>>
Subject: [dpdk-dev] Unlinking hugepage backing file after initialiation
Hello,
As of DPDK2.1, backing files are created in hugetablefs during mapping (in eal_memory.c::rte_eal_hugepage_init()) and these files are not cleaned up (unlinked) after initialization (mmap-ing). This means, when the application crashes or stopped, the memory is still consumed. Therefore, is there any reason not to unlink backing files after initialization ? If no, I will send a patch for the change.
--
- Thanks
char * (*shesha) (uint64_t cache, uint8_t F00D)
{ return 0x0000C0DE; }
next reply other threads:[~2015-09-29 0:24 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-29 0:24 shesha Sreenivasamurthy (shesha) [this message]
-- strict thread matches above, loose matches on Subject: below --
2015-09-29 0:04 shesha Sreenivasamurthy (shesha)
2015-09-29 2:37 ` Xie, Huawei
2015-09-29 15:15 ` Xie, Huawei
2015-09-29 15:48 ` shesha Sreenivasamurthy (shesha)
2015-09-29 16:16 ` Michael S. Tsirkin
2015-09-29 17:50 ` shesha Sreenivasamurthy (shesha)
2015-09-29 21:35 ` Michael S. Tsirkin
2015-09-30 21:44 ` shesha Sreenivasamurthy (shesha)
2015-09-30 21:53 ` Ananyev, Konstantin
2015-09-30 22:04 ` shesha Sreenivasamurthy (shesha)
2015-10-01 8:41 ` Bruce Richardson
2015-10-05 13:08 ` Xie, Huawei
2015-10-05 20:20 ` Michael S. Tsirkin
2015-10-12 8:46 ` Xie, Huawei
2015-09-29 9:03 ` Ananyev, Konstantin
2015-09-29 11:14 ` Bruce Richardson
2015-09-29 14:03 ` shesha Sreenivasamurthy (shesha)
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