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r: 264285
b: refs/heads/master
c: 186c6bb
h: refs/heads/master
i:
  264283: 6645929
v: v3
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Benjamin Poirier authored and David S. Miller committed Oct 6, 2011
1 parent 57cb27b commit 6a5b453
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2 changes: 1 addition & 1 deletion [refs]
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refs/heads/master: b64b73d7d0c480f75684519c6134e79d50c1b341
refs/heads/master: 186c6bbced722cfeff041d2a1264c95f5d042050
10 changes: 5 additions & 5 deletions trunk/Documentation/networking/scaling.txt
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Expand Up @@ -27,7 +27,7 @@ applying a filter to each packet that assigns it to one of a small number
of logical flows. Packets for each flow are steered to a separate receive
queue, which in turn can be processed by separate CPUs. This mechanism is
generally known as “Receive-side Scaling” (RSS). The goal of RSS and
the other scaling techniques to increase performance uniformly.
the other scaling techniques is to increase performance uniformly.
Multi-queue distribution can also be used for traffic prioritization, but
that is not the focus of these techniques.

Expand Down Expand Up @@ -186,10 +186,10 @@ are steered using plain RPS. Multiple table entries may point to the
same CPU. Indeed, with many flows and few CPUs, it is very likely that
a single application thread handles flows with many different flow hashes.

rps_sock_table is a global flow table that contains the *desired* CPU for
flows: the CPU that is currently processing the flow in userspace. Each
table value is a CPU index that is updated during calls to recvmsg and
sendmsg (specifically, inet_recvmsg(), inet_sendmsg(), inet_sendpage()
rps_sock_flow_table is a global flow table that contains the *desired* CPU
for flows: the CPU that is currently processing the flow in userspace.
Each table value is a CPU index that is updated during calls to recvmsg
and sendmsg (specifically, inet_recvmsg(), inet_sendmsg(), inet_sendpage()
and tcp_splice_read()).

When the scheduler moves a thread to a new CPU while it has outstanding
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