Trond Myklebust edc1b01cd3 SUNRPC: Move TCP receive data path into a workqueue context ...

Stream protocols such as TCP can often build up a backlog of data to be
read due to ordering. Combine this with the fact that some workloads such
as NFS read()-intensive workloads need to receive a lot of data per RPC
call, and it turns out that receiving the data from inside a softirq
context can cause starvation.

The following patch moves the TCP data receive into a workqueue context.
We still end up calling tcp_read_sock(), but we do so from a process
context, meaning that softirqs are enabled for most of the time.

With this patch, I see a doubling of read bandwidth when running a
multi-threaded iozone workload between a virtual client and server setup.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>

2015-10-08 08:27:04 -04:00

..

addr.h

SUNRPC: Drop double-underscores from __rpc_cmp_addr6()

2015-08-17 14:47:53 -05:00

auth_gss.h

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auth.h

sunrpc: increase UNX_MAXNODENAME from 32 to __NEW_UTS_LEN bytes

2015-08-12 14:31:04 -04:00

bc_xprt.h

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cache.h

sunrpc: Switch to using hash list instead single list

2015-08-13 08:59:03 -04:00

clnt.h

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debug.h

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gss_api.h

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gss_asn1.h

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gss_err.h

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gss_krb5_enctypes.h

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gss_krb5.h

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metrics.h

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msg_prot.h

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rpc_pipe_fs.h

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rpc_rdma.h

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sched.h

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stats.h

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svc_rdma.h

Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma

2015-09-09 08:33:31 -07:00

svc_xprt.h

nfsd/sunrpc: turn enqueueing a svc_xprt into a svc_serv operation

2015-08-10 16:05:42 -04:00

svc.h

nfsd/sunrpc: factor svc_rqst allocation and freeing from sv_nrthreads refcounting

2015-08-10 16:05:44 -04:00

svcauth_gss.h

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svcauth.h

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svcsock.h

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timer.h

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types.h

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xdr.h

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xprt.h

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xprtrdma.h

xprtrdma: Increase default credit limit

2015-08-05 16:21:26 -04:00

xprtsock.h

SUNRPC: Move TCP receive data path into a workqueue context

2015-10-08 08:27:04 -04:00