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Carlo Alberto Ferraris 05051b56a0 sync: allow inlining the RWMutex.RUnlock fast path 
RWMutex.RLock is already inlineable, so add a test for it as well.

name                    old time/op  new time/op  delta
RWMutexUncontended      66.5ns ± 0%  60.3ns ± 1%  -9.38%  (p=0.000 n=12+20)
RWMutexUncontended-4    16.7ns ± 0%  15.3ns ± 1%  -8.49%  (p=0.000 n=17+20)
RWMutexUncontended-16   7.86ns ± 0%  7.69ns ± 0%  -2.08%  (p=0.000 n=18+15)
RWMutexWrite100         25.1ns ± 0%  24.0ns ± 1%  -4.28%  (p=0.000 n=20+18)
RWMutexWrite100-4       46.7ns ± 5%  44.1ns ± 4%  -5.53%  (p=0.000 n=20+20)
RWMutexWrite100-16      68.3ns ±11%  65.7ns ± 8%  -3.81%  (p=0.003 n=20+20)
RWMutexWrite10          26.7ns ± 1%  25.7ns ± 0%  -3.75%  (p=0.000 n=17+14)
RWMutexWrite10-4        34.9ns ± 2%  33.8ns ± 2%  -3.15%  (p=0.000 n=20+20)
RWMutexWrite10-16       37.4ns ± 2%  36.1ns ± 2%  -3.51%  (p=0.000 n=18+20)
RWMutexWorkWrite100      163ns ± 0%   162ns ± 0%  -0.89%  (p=0.000 n=18+20)
RWMutexWorkWrite100-4    189ns ± 4%   184ns ± 4%  -2.89%  (p=0.000 n=19+20)
RWMutexWorkWrite100-16   207ns ± 4%   200ns ± 2%  -3.07%  (p=0.000 n=19+20)
RWMutexWorkWrite10       153ns ± 0%   151ns ± 1%  -0.75%  (p=0.000 n=20+20)
RWMutexWorkWrite10-4     177ns ± 1%   176ns ± 2%  -0.63%  (p=0.004 n=17+20)
RWMutexWorkWrite10-16    191ns ± 2%   189ns ± 1%  -0.83%  (p=0.015 n=20+17)

linux/amd64 bin/go 14688201 (previous commit 14675861, +12340/+0.08%)

The cumulative effect of this and the previous 3 commits is:

name                    old time/op  new time/op  delta
MutexUncontended        19.3ns ± 1%  16.4ns ± 1%  -15.13%  (p=0.000 n=20+20)
MutexUncontended-4      5.24ns ± 0%  4.09ns ± 0%  -21.95%  (p=0.000 n=20+18)
MutexUncontended-16     2.10ns ± 0%  2.12ns ± 0%   +0.95%  (p=0.000 n=15+17)
Mutex                   19.6ns ± 0%  16.3ns ± 1%  -17.12%  (p=0.000 n=20+20)
Mutex-4                 54.6ns ± 5%  45.6ns ±10%  -16.51%  (p=0.000 n=20+19)
Mutex-16                 133ns ± 5%   130ns ± 3%   -1.99%  (p=0.002 n=20+20)
MutexSlack              33.4ns ± 2%  16.2ns ± 0%  -51.44%  (p=0.000 n=19+20)
MutexSlack-4             206ns ± 5%   209ns ± 9%     ~     (p=0.154 n=20+20)
MutexSlack-16           89.4ns ± 1%  90.9ns ± 2%   +1.70%  (p=0.000 n=18+17)
MutexWork               60.5ns ± 0%  55.3ns ± 1%   -8.59%  (p=0.000 n=12+20)
MutexWork-4              105ns ± 5%    97ns ±11%   -7.95%  (p=0.000 n=20+20)
MutexWork-16             157ns ± 1%   158ns ± 1%   +0.66%  (p=0.001 n=18+17)
MutexWorkSlack          70.2ns ± 5%  55.3ns ± 0%  -21.30%  (p=0.000 n=19+18)
MutexWorkSlack-4         277ns ±13%   260ns ±15%   -6.35%  (p=0.002 n=20+18)
MutexWorkSlack-16        156ns ± 0%   146ns ± 1%   -6.40%  (p=0.000 n=16+19)
MutexNoSpin              966ns ± 0%   976ns ± 1%   +0.97%  (p=0.000 n=15+17)
MutexNoSpin-4            269ns ± 4%   272ns ± 4%   +1.15%  (p=0.048 n=20+18)
MutexNoSpin-16           122ns ± 0%   119ns ± 1%   -2.63%  (p=0.000 n=19+15)
MutexSpin               3.13µs ± 0%  3.12µs ± 0%   -0.17%  (p=0.000 n=18+18)
MutexSpin-4              826ns ± 1%   833ns ± 1%   +0.84%  (p=0.000 n=19+17)
MutexSpin-16             397ns ± 1%   394ns ± 1%   -0.78%  (p=0.000 n=19+19)
Once                    5.67ns ± 0%  2.07ns ± 2%  -63.43%  (p=0.000 n=20+20)
Once-4                  1.47ns ± 2%  0.54ns ± 3%  -63.49%  (p=0.000 n=19+20)
Once-16                 0.58ns ± 0%  0.17ns ± 5%  -70.49%  (p=0.000 n=17+17)
RWMutexUncontended      71.4ns ± 0%  60.3ns ± 1%  -15.60%  (p=0.000 n=16+20)
RWMutexUncontended-4    18.4ns ± 4%  15.3ns ± 1%  -17.14%  (p=0.000 n=20+20)
RWMutexUncontended-16   8.01ns ± 0%  7.69ns ± 0%   -3.91%  (p=0.000 n=18+15)
RWMutexWrite100         24.9ns ± 0%  24.0ns ± 1%   -3.57%  (p=0.000 n=19+18)
RWMutexWrite100-4       46.5ns ± 3%  44.1ns ± 4%   -5.09%  (p=0.000 n=17+20)
RWMutexWrite100-16      68.9ns ± 3%  65.7ns ± 8%   -4.65%  (p=0.000 n=18+20)
RWMutexWrite10          27.1ns ± 0%  25.7ns ± 0%   -5.25%  (p=0.000 n=17+14)
RWMutexWrite10-4        34.8ns ± 1%  33.8ns ± 2%   -2.96%  (p=0.000 n=20+20)
RWMutexWrite10-16       37.5ns ± 2%  36.1ns ± 2%   -3.72%  (p=0.000 n=20+20)
RWMutexWorkWrite100      164ns ± 0%   162ns ± 0%   -1.49%  (p=0.000 n=12+20)
RWMutexWorkWrite100-4    186ns ± 3%   184ns ± 4%     ~     (p=0.097 n=20+20)
RWMutexWorkWrite100-16   204ns ± 2%   200ns ± 2%   -1.58%  (p=0.000 n=18+20)
RWMutexWorkWrite10       153ns ± 0%   151ns ± 1%   -1.21%  (p=0.000 n=20+20)
RWMutexWorkWrite10-4     179ns ± 1%   176ns ± 2%   -1.25%  (p=0.000 n=19+20)
RWMutexWorkWrite10-16    191ns ± 1%   189ns ± 1%   -0.94%  (p=0.000 n=15+17)

Change-Id: I9269bf2ac42a04c610624f707d3268dcb17390f8
Reviewed-on: https://go-review.googlesource.com/c/go/+/152698
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Austin Clements <austin@google.com>
2019-03-09 16:34:17 +00:00
..
alias3.dir
bench test/bench/go1: add go.mod file 2019-03-06 18:53:12 +00:00
chan test/chan: fix broken link to Squinting at Power Series 2019-02-06 20:54:16 +00:00
closure3.dir cmd/compile: encourage inlining of functions with single-call bodies 2018-11-08 17:29:23 +00:00
codegen cmd/compile: change the condition flags of floating-point comparisons in arm64 backend 2019-03-07 21:23:52 +00:00
ddd2.dir
dwarf
fixedbugs reflect: fix more issues with StructOf GC programs 2019-03-07 00:06:12 +00:00
import2.dir
import4.dir
interface
intrinsic.dir
ken test: remove rundircmpout and cmpout actions 2018-05-31 17:36:45 +00:00
linkname.dir
method4.dir
retjmp.dir cmd/asm: fix assembling return jump 2018-03-01 21:11:16 +00:00
stress
syntax cmd/compile: better handling of incorrect type switches 2018-04-03 05:34:20 +00:00
uintptrescapes.dir
64bit.go
235.go
alg.go
alias1.go
alias2.go cmd/compile: cleanup method symbol creation 2018-04-05 22:01:17 +00:00
alias3.go
alias.go
align.go test: check that unaligned load-add opcodes work. 2018-04-09 18:57:37 +00:00
append1.go cmd/compile: optimize append(x, make([]T, y)...) slice extension 2018-05-06 04:28:23 +00:00
append.go cmd/compile: optimize append(x, make([]T, y)...) slice extension 2018-05-06 04:28:23 +00:00
args.go
armimm.go
assign1.go
assign.go
atomicload.go
bigalg.go
bigmap.go
blank1.go
blank.go
bom.go
bombad.go
bounds.go test: gofmt bounds.go 2018-05-29 02:39:16 +00:00
chancap.go runtime: handle 64bits addresses for AIX 2018-11-26 14:06:28 +00:00
chanlinear.go
char_lit1.go
char_lit.go
checkbce.go cmd/compile: fix ordering for short-circuiting ops 2019-03-06 20:04:07 +00:00
clearfat.go
closedchan.go
closure1.go
closure2.go
closure3.go all: fix a bunch of misspellings 2018-10-06 15:40:03 +00:00
closure4.go cmd/compile/internal/gc: add nil check for closure call on wasm 2018-08-14 09:19:38 +00:00
closure.go
cmp6.go
cmp.go
cmplx.go Revert "cmd/compile: rewrite f(g()) for multi-value g() during typecheck" 2019-03-01 05:58:51 +00:00
cmplxdivide1.go
cmplxdivide.c
cmplxdivide.go
complit1.go
complit.go
compos.go
const1.go cmd/compile: fix constant pointer comparison failure 2018-04-09 23:19:45 +00:00
const2.go
const3.go
const4.go
const5.go
const6.go
const.go
convert1.go
convert2.go
convert3.go
convert.go
convlit1.go
convlit.go
convT2X.go
copy1.go Revert "cmd/compile: rewrite f(g()) for multi-value g() during typecheck" 2019-03-01 05:58:51 +00:00
copy.go
crlf.go
ddd1.go
ddd2.go
ddd.go
decl.go
declbad.go
defer.go
deferfin.go
deferprint.go test: remove rundircmpout and cmpout actions 2018-05-31 17:36:45 +00:00
deferprint.out
devirt.go
divide.go
divmod.go
empty.go
env.go
eof1.go
eof.go
escape2.go cmd/compile/internal/gc: unify self-assignment checks in esc.go 2018-09-20 09:46:11 +00:00
escape2n.go cmd/compile/internal/gc: unify self-assignment checks in esc.go 2018-09-20 09:46:11 +00:00
escape3.go
escape4.go cmd/compile: fix panic-okay-to-inline change; adjust tests 2018-06-06 20:35:23 +00:00
escape5.go cmd/compile: fix unnamed parameter handling in escape analysis 2018-12-04 23:01:00 +00:00
escape_array.go cmd/compile: print accurate escape reason for non-const-length slices 2018-03-28 16:56:03 +00:00
escape_because.go cmd/compile: flow interface data to heap if CONVIFACE of a non-direct interface escapes 2019-02-21 15:14:45 +00:00
escape_calls.go
escape_closure.go
escape_field.go
escape_iface.go
escape_indir.go
escape_level.go
escape_map.go
escape_param.go cmd/compile: flow interface data to heap if CONVIFACE of a non-direct interface escapes 2019-02-21 15:14:45 +00:00
escape_slice.go
escape_struct_param1.go
escape_struct_param2.go
escape_struct_return.go
escape.go
fibo.go
finprofiled.go
float_lit2.go
float_lit3.go
float_lit.go
floatcmp.go
for.go
func1.go
func2.go
func3.go
func4.go
func5.go
func6.go
func7.go
func8.go
func.go
funcdup2.go
funcdup.go
gc1.go
gc2.go all: skip unsupported tests for js/wasm 2018-04-30 19:39:18 +00:00
gc.go
gcgort.go test: fast GC+concurrency+types verification 2018-05-08 21:15:48 +00:00
gcstring.go
goprint.go test: remove rundircmpout and cmpout actions 2018-05-31 17:36:45 +00:00
goprint.out
goto.go
heapsampling.go test: improve test coverage for heap sampling 2019-03-07 21:05:15 +00:00
helloworld.go test: remove rundircmpout and cmpout actions 2018-05-31 17:36:45 +00:00
helloworld.out
if.go
import1.go
import2.go
import4.go
import5.go
import6.go
import.go
index0.go
index1.go
index2.go
index.go
indirect1.go
indirect.go
init1.go
init.go
initcomma.go
initialize.go
initializerr.go
initloop.go
inline_big.go cmd/compile: set stricter inlining threshold in large functions 2018-07-24 16:11:08 +00:00
inline_caller.go runtime: make FuncForPC return the innermost inlined frame 2019-01-08 21:54:04 +00:00
inline_callers.go runtime: make FuncForPC return the innermost inlined frame 2019-01-08 21:54:04 +00:00
inline_literal.go
inline_math_bits_rotate.go cmd/compile: make math/bits.RotateLeft* an intrinsic on amd64 2018-08-30 22:48:28 +00:00
inline_sync.go sync: allow inlining the RWMutex.RUnlock fast path 2019-03-09 16:34:17 +00:00
inline_variadic.go cmd/compile: enable inlining variadic functions 2018-03-13 20:34:03 +00:00
inline.go cmd/compile: encourage inlining of functions with single-call bodies 2018-11-08 17:29:23 +00:00
int_lit.go
intcvt.go
intrinsic_atomic.go
intrinsic.go
iota.go
label1.go
label.go
linkmain_run.go all: skip unsupported tests for js/wasm 2018-04-30 19:39:18 +00:00
linkmain.go
linkname.go
linkobj.go all: skip unsupported tests for js/wasm 2018-04-30 19:39:18 +00:00
linkx_run.go all: skip unsupported tests for js/wasm 2018-04-30 19:39:18 +00:00
linkx.go
literal2.go cmd/compile: accept 'i' suffix orthogonally on all numbers 2019-02-19 22:45:09 +00:00
literal.go
live1.go
live2.go cmd/compile,runtime: remove ambiguously live logic 2018-10-03 19:54:16 +00:00
live_syscall.go cmd/compile: encourage inlining of functions with single-call bodies 2018-11-08 17:29:23 +00:00
live.go cmd/compile: fix ordering for short-circuiting ops 2019-03-06 20:04:07 +00:00
locklinear.go test: skip locklinear's lockmany test for now 2018-04-05 10:53:40 +00:00
loopbce.go cmd/compile: reverse order of slice bounds checks 2019-03-09 00:52:45 +00:00
makechan.go
makemap.go test: check that size argument errors are emitted at call site 2018-03-14 08:36:15 +00:00
makenew.go
mallocfin.go
map1.go
map.go
mapclear.go cmd/compile: optimize map-clearing range idiom 2018-05-08 21:15:16 +00:00
maplinear.go
mergemul.go
method1.go
method2.go
method3.go
method4.go
method5.go
method6.go
method7.go cmd/compile: fix method expressions with anonymous receivers 2018-04-06 15:39:11 +00:00
method.go
named1.go
named.go
nil.go
nilcheck.go
nilptr2.go
nilptr3.go cmd/compile: fix nilcheck for AIX 2018-11-26 14:13:53 +00:00
nilptr4.go
nilptr5_aix.go test: fix nilptr5 for AIX 2018-11-27 15:36:08 +00:00
nilptr5_wasm.go cmd/compile: fix nilcheck for AIX 2018-11-26 14:13:53 +00:00
nilptr5.go cmd/compile: fix nilcheck for AIX 2018-11-26 14:13:53 +00:00
nilptr_aix.go cmd/compile: fix nilcheck for AIX 2018-11-26 14:13:53 +00:00
nilptr.go cmd/compile: fix nilcheck for AIX 2018-11-26 14:13:53 +00:00
nosplit.go test: add a go.mod file in the working directory of nosplit.go 2019-02-26 02:44:45 +00:00
notinheap2.go
notinheap3.go cmd/compile: omit write barriers for slice clears of go:notinheap pointers 2018-12-05 21:54:54 +00:00
notinheap.go cmd/compile: disallow converting string to notinheap slice 2018-11-02 19:53:59 +00:00
nowritebarrier.go
nul1.go
opt_branchlikely.go
parentype.go
peano.go all: skip unsupported tests for js/wasm 2018-04-30 19:39:18 +00:00
phiopt.go
print.go test: remove rundircmpout and cmpout actions 2018-05-31 17:36:45 +00:00
print.out
printbig.go test: remove rundircmpout and cmpout actions 2018-05-31 17:36:45 +00:00
printbig.out
prove.go cmd/compile: reverse order of slice bounds checks 2019-03-09 00:52:45 +00:00
range.go
README.md test: use the version of Go used to run run.go 2018-03-03 19:52:00 +00:00
recover1.go
recover2.go
recover3.go
recover4.go all: use Fatalf instead of Fatal if format is given 2018-01-10 01:35:45 +00:00
recover5.go
recover.go
reflectmethod1.go
reflectmethod2.go
reflectmethod3.go
reflectmethod4.go
rename1.go
rename.go
reorder2.go
reorder.go
retjmp.go cmd/asm: fix assembling return jump 2018-03-01 21:11:16 +00:00
return.go
rotate0.go
rotate1.go
rotate2.go
rotate3.go
rotate.go
run.go cmd/compile: use innermost line number for -S 2018-12-11 20:24:45 +00:00
rune.go
runtime.go
shift1.go cmd/compile: permit indices of certain non-constant shifts 2017-12-01 20:39:50 +00:00
shift2.go
sieve.go
sigchld.go test: remove rundircmpout and cmpout actions 2018-05-31 17:36:45 +00:00
sigchld.out
simassign.go
sinit_run.go all: skip unsupported tests for js/wasm 2018-04-30 19:39:18 +00:00
sinit.go cmd/compile: fix static initializer 2018-12-03 16:48:21 +00:00
sizeof.go
slice3.go
slice3err.go
slicecap.go
sliceopt.go cmd/compile: make prove pass use unsatisfiability 2018-03-08 22:25:25 +00:00
solitaire.go
stack.go
stackobj2.go test: stress test for stack objects 2018-10-03 19:54:29 +00:00
stackobj3.go cmd/compile,runtime: remove ambiguously live logic 2018-10-03 19:54:16 +00:00
stackobj.go cmd/compile,runtime: remove ambiguously live logic 2018-10-03 19:54:16 +00:00
strcopy.go test: add test to verify that string copies don't get optimized away 2018-06-12 19:10:34 +00:00
strength.go
string_lit.go
stringrange.go
struct0.go
switch2.go
switch3.go
switch4.go
switch5.go Revert "fmt: fix incorrect format of whole-number floats when using %#v" 2018-10-16 21:54:35 +00:00
switch6.go
switch7.go
switch.go
tinyfin.go
torture.go
turing.go
typecheck.go
typecheckloop.go
typeswitch1.go
typeswitch2.go test: fix spelling of caught be the compiler to caught by the compiler 2018-10-04 00:49:49 +00:00
typeswitch3.go test: fix spelling of caught be the compiler to caught by the compiler 2018-10-04 00:49:49 +00:00
typeswitch.go
uintptrescapes2.go cmd/compile: reuse temporaries in order pass 2018-10-14 05:21:00 +00:00
uintptrescapes.go
undef.go
utf.go
varerr.go
varinit.go
writebarrier.go cmd/compile: eliminate write barriers when writing non-heap ptrs 2018-11-29 22:23:02 +00:00
zerodivide.go

README.md

The test directory contains tests of the Go tool chain and runtime. It includes black box tests, regression tests, and error output tests. They are run as part of all.bash.

To run just these tests, execute:

../bin/go run run.go

Standard library tests should be written as regular Go tests in the appropriate package.

The tool chain and runtime also have regular Go tests in their packages. The main reasons to add a new test to this directory are:

  • it is most naturally expressed using the test runner; or
  • it is also applicable to gccgo and other Go tool chains.