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10 Commits

Author SHA1 Message Date
Dave Cheney
5b425cc3ab undo CL 6855110 / 869253ef7009 
64bit atomics are broken on 32bit systems. This is issue 599.

linux/arm builders all broke with this change, I am concerned that the other 32bit builders are silently impacted.

««« original CL description
net: fix data races on deadline vars

Fixes #4434.

R=mikioh.mikioh, bradfitz, dvyukov, alex.brainman
CC=golang-dev
https://golang.org/cl/6855110
»»»

R=rsc, mikioh.mikioh, dvyukov, minux.ma
CC=golang-dev
https://golang.org/cl/6852105
 2012-11-30 20:02:30 +11:00
Dave Cheney
be0d84e335 net: fix data races on deadline vars 
Fixes #4434.

R=mikioh.mikioh, bradfitz, dvyukov, alex.brainman
CC=golang-dev
https://golang.org/cl/6855110
 2012-11-30 18:26:51 +11:00
Sébastien Paolacci
7014bc64b1 net: spread fd over several pollservers. 
Lighten contention without preventing further improvements on pollservers.
Connections are spread over Min(GOMAXPROCS, NumCPU, 8) pollserver instances.

Median of 10 runs, 4 cores @ 3.4GHz, amd/linux-3.2:

BenchmarkTCPOneShot                171917 ns/op   175194 ns/op      1.91%
BenchmarkTCPOneShot-2              101413 ns/op   109462 ns/op      7.94%
BenchmarkTCPOneShot-4               91796 ns/op    35712 ns/op    -61.10%
BenchmarkTCPOneShot-6               90938 ns/op    30607 ns/op    -66.34%
BenchmarkTCPOneShot-8               90374 ns/op    29150 ns/op    -67.75%
BenchmarkTCPOneShot-16             101089 ns/op   111526 ns/op     10.32%

BenchmarkTCPOneShotTimeout         174986 ns/op   178606 ns/op      2.07%
BenchmarkTCPOneShotTimeout-2       101585 ns/op   110678 ns/op      8.95%
BenchmarkTCPOneShotTimeout-4        91547 ns/op    35931 ns/op    -60.75%
BenchmarkTCPOneShotTimeout-6        91496 ns/op    31019 ns/op    -66.10%
BenchmarkTCPOneShotTimeout-8        90670 ns/op    29531 ns/op    -67.43%
BenchmarkTCPOneShotTimeout-16      101013 ns/op   106026 ns/op      4.96%

BenchmarkTCPPersistent              51731 ns/op    53324 ns/op      3.08%
BenchmarkTCPPersistent-2            32888 ns/op    30678 ns/op     -6.72%
BenchmarkTCPPersistent-4            25751 ns/op    15595 ns/op    -39.44%
BenchmarkTCPPersistent-6            26737 ns/op     9805 ns/op    -63.33%
BenchmarkTCPPersistent-8            26850 ns/op     9730 ns/op    -63.76%
BenchmarkTCPPersistent-16          104449 ns/op   102838 ns/op     -1.54%

BenchmarkTCPPersistentTimeout       51806 ns/op    53281 ns/op      2.85%
BenchmarkTCPPersistentTimeout-2     32956 ns/op    30895 ns/op     -6.25%
BenchmarkTCPPersistentTimeout-4     25994 ns/op    18111 ns/op    -30.33%
BenchmarkTCPPersistentTimeout-6     26679 ns/op     9846 ns/op    -63.09%
BenchmarkTCPPersistentTimeout-8     26810 ns/op     9727 ns/op    -63.72%
BenchmarkTCPPersistentTimeout-16   101652 ns/op   104410 ns/op      2.71%

R=rsc, dvyukov, dave, mikioh.mikioh, bradfitz, remyoudompheng
CC=golang-dev
https://golang.org/cl/6496054
 2012-09-26 15:32:59 -04:00
Russ Cox
5e4e3d8e44 net: avoid Shutdown during Close 
Once we've evicted all the blocked I/O, the ref count
should go to zero quickly, so it should be safe to
postpone the close(2) until then.

Fixes #1898.
Fixes #2116.
Fixes #2122.

R=golang-dev, mikioh.mikioh, bradfitz, fullung, iant
CC=golang-dev
https://golang.org/cl/5649076
 2012-02-14 00:40:37 -05:00
Brad Fitzpatrick
4152b43457 os: delete Exec, NewFile takes uintptr, rename ShellExpand, doc fixes 
Delete O_NDELAY, O_NONBLOCK, O_NOCTTY, O_ASYNC.

Clean up some docs.

Rename ShellExpand -> ExpandEnv.

Make NewFile take a uintptr; change File.Fd to return one.
(for API compatibility between Unix and Windows)

Fixes #2947

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/5655045
 2012-02-10 14:16:15 +11:00
Mikio Hara
28397befab net: replace error variable name e, errno with err 
R=rsc, r
CC=golang-dev
https://golang.org/cl/5593046
 2012-02-01 00:36:45 +09:00
Brad Fitzpatrick
b71883e9b0 net: change SetTimeout to SetDeadline 
Previously, a timeout (in int64 nanoseconds) applied to a granularity
even smaller than one operation:  a 100 byte read with a 1 second timeout
could take 100 seconds, if the bytes all arrived on the network 1 second
apart.  This was confusing.

Rather than making the timeout granularity be per-Read/Write,
this CL makes callers set an absolute deadline (in time.Time)
after which operations will fail.  This makes it possible to
set deadlines at higher levels, without knowing exactly how
many read/write operations will happen in e.g. reading an HTTP
request.

Fixes #2723

R=r, rsc, dave
CC=golang-dev
https://golang.org/cl/5555048
 2012-01-18 16:24:06 -08:00
Russ Cox
c017a8299f syscall: use error 
- syscall (not os) now defines the Errno type.
- the low-level assembly functions Syscall, Syscall6, and so on
  return Errno, not uintptr
- syscall wrappers all return error, not uintptr.

R=golang-dev, mikioh.mikioh, r, alex.brainman
CC=golang-dev
https://golang.org/cl/5372080
 2011-11-13 22:44:52 -05:00
Russ Cox
eb6929299b src/pkg/[n-z]*: gofix -r error -force=error 
R=golang-dev, bsiegert, iant
CC=golang-dev
https://golang.org/cl/5294074
 2011-11-01 22:05:34 -04:00
Brad Fitzpatrick
b0f39cc27c io, net, http: sendfile support 
Speeds up static fileserver, avoiding kernel/userspace copies.

Numbers: downloading 14 MB AppEngine Go SDK with ab (Apache Bench)
with 5 threads:

Before/after numbers:

CPU:
user    0m3.910s
sys     0m23.650s
->
user    0m0.720s
sys     0m4.890s

Time taken for tests:   8.906 seconds
->
Time taken for tests:   8.545 seconds

Percentage of the requests served within a certain time (ms)
50%     44
66%     45
75%     46
80%     46
90%     48
95%     51
98%     59
99%     71
100     74 (longest request)
->
50%     42
66%     43
75%     43
80%     44
90%     46
95%     57
98%     62
99%     63
100%    64 (longest request)

R=iant, gary.burd, rsc, bradfitz
CC=golang-dev
https://golang.org/cl/4543071
 2011-05-25 10:15:26 -07:00