But when I read the code of l2fwd (v1.5.1 examples), I found that two cores share only one queue of a port.
And it doesn't use any lock or other mechanism to ensure the safety. How is it OK? ----- Original Message ----- From: "Stephen Hemminger" <step...@networkplumber.org> To: "chen_lp" <chen_lp at neusoft.com> Cc: <dev at dpdk.org> Sent: Thursday, January 09, 2014 2:28 PM Subject: Re: [dpdk-dev] Does the rte_eth_tx_burst() function is multi-threaded safe when sending pkt in same port and same queue ? > The rx and tx functions are safe only if a queue is not shared by > multiple threads (or the threads synchronize through some other > mechanism). The safest design is to only use a queue on a single core. > You will see different architectures in the examples. Some use one > queue per core, and others use separate receive and transmit cores. > > On Wed, Jan 8, 2014 at 8:16 PM, chen_lp <chen_lp at neusoft.com> wrote: >> >> --------------------------------------------------------------------------------------------------- >> Confidentiality Notice: The information contained in this e-mail and any >> accompanying attachment(s) >> is intended only for the use of the intended recipient and may be >> confidential and/or privileged of >> Neusoft Corporation, its subsidiaries and/or its affiliates. If any reader >> of this communication is >> not the intended recipient, unauthorized use, forwarding, printing, >> storing, disclosure or copying >> is strictly prohibited, and may be unlawful.If you have received this >> communication in error,please >> immediately notify the sender by return e-mail, and delete the original >> message and all copies from >> your system. Thank you. >> --------------------------------------------------------------------------------------------------- --------------------------------------------------------------------------------------------------- Confidentiality Notice: The information contained in this e-mail and any accompanying attachment(s) is intended only for the use of the intended recipient and may be confidential and/or privileged of Neusoft Corporation, its subsidiaries and/or its affiliates. If any reader of this communication is not the intended recipient, unauthorized use, forwarding, printing, storing, disclosure or copying is strictly prohibited, and may be unlawful.If you have received this communication in error,please immediately notify the sender by return e-mail, and delete the original message and all copies from your system. Thank you. ---------------------------------------------------------------------------------------------------
