From: "Gaul, Maximilian" <maximilian.gaul@hm.edu>
To: Xdp <xdp-newbies@vger.kernel.org>
Subject: Dynamically adding new multicast streams
Date: Thu, 4 Jun 2020 11:17:11 +0000 [thread overview]
Message-ID: <dd7946c400c544feac167dab0ff4f974@hm.edu> (raw)
Hello everyone,
I try to dynamically add new multicast streams by creating a new AF-XDP socket bound to a RX-Queue.
I also create a new ethtool-rule to steer the flow of the multicast stream towards that RX-Queue.
My BPF program has a Hash-Map which maps a struct consisting of { src-ip, dst-ip, dst-port } to an index in the XSKMap (which is then used to redirect an incoming packet).
So adding a new AF-XDP socket also means adding a new entry to that Hash-Map (and to the XSKMap).
Now what I am experiencing is that the moment I add a new XSK, other already running sockets are loosing some packets (around 10ms worth of packets).
I don't experience any packet loss afterwards.
My question is: Is there something happening inside the XSK- or HashMap which could cause other packet streams to drop packets?
I am not using Shared Umem, just launching a new process which starts that XSK.
Best regards
Max
next reply other threads:[~2020-06-04 11:17 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-04 11:17 Gaul, Maximilian [this message]
2020-06-04 11:40 ` Dynamically adding new multicast streams Magnus Karlsson
2020-06-04 11:59 ` AW: " Gaul, Maximilian
2020-06-04 13:01 ` Magnus Karlsson
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