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| author | Jon Maloy <jmaloy@redhat.com> | 2024-07-12 15:04:49 -0400 |
|---|---|---|
| committer | Stefano Brivio <sbrivio@redhat.com> | 2024-07-15 17:57:03 +0200 |
| commit | e63d281871efff5e411275ce2ba1509314c75898 (patch) | |
| tree | 72b7c84dfd19ec2bf936f72a72adebd07307d027 /udp.c | |
| parent | 8bd57bf25bab5ad14bd43242558243b20b49f80e (diff) | |
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tcp: leverage support of SO_PEEK_OFF socket option when available
>From linux-6.9.0 the kernel will contain
commit 05ea491641d3 ("tcp: add support for SO_PEEK_OFF socket option").
This new feature makes is possible to call recv_msg(MSG_PEEK) and make
it start reading data from a given offset set by the SO_PEEK_OFF socket
option. This way, we can avoid repeated reading of already read bytes of
a received message, hence saving read cycles when forwarding TCP
messages in the host->name space direction.
In this commit, we add functionality to leverage this feature when
available, while we fall back to the previous behavior when not.
Measurements with iperf3 shows that throughput increases with 15-20
percent in the host->namespace direction when this feature is used.
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Jon Maloy <jmaloy@redhat.com>
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
Diffstat (limited to 'udp.c')
0 files changed, 0 insertions, 0 deletions