[dpdk-dev] 回复:RE: 回复:RE: Thread safety in rte_acl

真我风采 1534057243 at qq.com
Mon Jan 8 14:42:10 CET 2018


Thanks very much!




------------------ 原始邮件 ------------------
发件人: "Ramia, Kannan Babu";<kannan.babu.ramia at intel.com>;
发送时间: 2018年1月8日(星期一) 晚上9:06
收件人: "真我风采"<1534057243 at qq.com>;"Ananyev, Konstantin"<konstantin.ananyev at intel.com>;"dev"<dev at dpdk.org>;

主题: RE: [dpdk-dev] 回复:RE:  Thread safety in rte_acl



You can look at the source of anyone of the applications in samplevnf project in OPNFV which uses the active/shadow method for dynamically modifying the rules and applying them.

Regards
Kannan Babu

-----Original Message-----
From: dev [mailto:dev-bounces at dpdk.org] On Behalf Of ????
Sent: Monday, January 8, 2018 5:30 PM
To: Ananyev, Konstantin <konstantin.ananyev at intel.com>; dev <dev at dpdk.org>
Subject: [dpdk-dev] 回复:RE: Thread safety in rte_acl

>> 2. Is it safe that one
>> thread will run  "rte_acl_classify" when another thread tries to add new rules to same ctx? thanks,

>Just add new rules is safe, but applying them (calling rte_acl_build()) is not.


In my case, there are two process sharing hugepage memory(struct rte_acl_ctx),  one process call 'rte_acl_build' to add and apply rule, another process call  frequently 'rte_acl_classify' to match rule, does it need to add lock? if not, is there other method to implement this safely?


------------------ 原始邮件 ------------------
发件人: "Ananyev, Konstantin";<konstantin.ananyev at intel.com>;
发送时间: 2018年1月8日(星期一) 晚上7:42
收件人: "真我风采"<1534057243 at qq.com>;"dev"<dev at dpdk.org>;

主题: RE: [dpdk-dev] Thread safety in rte_acl



> 
> Hi, I have two questions : 1. Is it safe that multiple threads will run "rte_acl_classify" in parallel  (on the same ctx )?

Yes.

> 2. Is it safe that one
> thread will run  "rte_acl_classify" when another thread tries to add new rules to same ctx? thanks,

Just add new rules is safe, but applying them (calling rte_acl_build()) is not.
Konstantin


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