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author | Tom Herbert <therbert@google.com> | 2013-01-22 09:50:24 (GMT) |
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committer | David S. Miller <davem@davemloft.net> | 2013-01-23 18:44:01 (GMT) |
commit | da5e36308d9f7151845018369148201a5d28b46d (patch) | |
tree | fff243a12ae5a1d16c2827b3ac41ac23ea2043c4 /Makefile | |
parent | 055dc21a1d1d219608cd4baac7d0683fb2cbbe8a (diff) | |
download | linux-da5e36308d9f7151845018369148201a5d28b46d.tar.xz |
soreuseport: TCP/IPv4 implementation
Allow multiple listener sockets to bind to the same port.
Motivation for soresuseport would be something like a web server
binding to port 80 running with multiple threads, where each thread
might have it's own listener socket. This could be done as an
alternative to other models: 1) have one listener thread which
dispatches completed connections to workers. 2) accept on a single
listener socket from multiple threads. In case #1 the listener thread
can easily become the bottleneck with high connection turn-over rate.
In case #2, the proportion of connections accepted per thread tends
to be uneven under high connection load (assuming simple event loop:
while (1) { accept(); process() }, wakeup does not promote fairness
among the sockets. We have seen the disproportion to be as high
as 3:1 ratio between thread accepting most connections and the one
accepting the fewest. With so_reusport the distribution is
uniform.
Signed-off-by: Tom Herbert <therbert@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'Makefile')
0 files changed, 0 insertions, 0 deletions