This reverts CL 465135.
Reason for revert: This broke cmd/go.TestScript/build_pgo on the linux-amd64-longtest builder: https://build.golang.org/log/8f8ed7bf576f891a06d295c4a5bca987c6e941d6
Change-Id: Ie2f2cc2731099eb28eda6b94dded4dfc34e29441
Reviewed-on: https://go-review.googlesource.com/c/go/+/466439
Run-TryBot: Michael Pratt <mpratt@google.com>
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Reviewed-by: Austin Clements <austin@google.com>
Auto-Submit: Michael Pratt <mpratt@google.com>
This patch detects at which index position profiling samples that have the value-type samples count are, instead of the previously hard-coded position of index 1. Runtime generated profiles always generate CPU profiling data with the 0 index being CPU nanoseconds, and samples count at index 1, which is why this previously hasn't come up.
Fixes#58292
Change-Id: Idde761d53b02259f3076c4e5dcb4a96a9d53df0e
GitHub-Last-Rev: dabbf9f88c
GitHub-Pull-Request: golang/go#58294
Reviewed-on: https://go-review.googlesource.com/c/go/+/465135
Auto-Submit: Michael Pratt <mpratt@google.com>
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Reviewed-by: Michael Pratt <mpratt@google.com>
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Reviewed-by: Cherry Mui <cherryyz@google.com>
testenv.Command sets a default timeout based on the test's deadline
and sends SIGQUIT (where supported) in case of a hang.
Change-Id: I084b324a20d5ecf733b2cb95f160947a7410a805
Reviewed-on: https://go-review.googlesource.com/c/go/+/450696
Reviewed-by: Ian Lance Taylor <iant@google.com>
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Auto-Submit: Bryan Mills <bcmills@google.com>
Run-TryBot: Bryan Mills <bcmills@google.com>
Adjust PGO inlining default parameters to 99% CDF threshold and
2000 budget. Benchmark results (mostly from Sweet) show that this
set of parameters performs reasonably well, with a few percent
speedup at the cost of a few percent binary size increase.
Also rename the debug flags to start with "pgo", to make it clear
that they are related to PGO.
Change-Id: I0749249b1298d1dc55a28993c37b3185f9d7639d
Reviewed-on: https://go-review.googlesource.com/c/go/+/449477
Run-TryBot: Cherry Mui <cherryyz@google.com>
Reviewed-by: Michael Pratt <mpratt@google.com>
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Rather than matching calls to edges in the profile based directly on
line number in the source file, use the line offset from the start of
the function. This makes matching robust to changes in the source file
above the function containing the call.
The start line in the profile comes from Function.start_line, which is
included in Go pprof output since CL 438255.
Currently it is an error if no samples set start_line to help users
detect profiles missing this information. In the future, we should
fallback to using absolute lines, which is better than nothing.
For #55022.
Change-Id: Ie621950cfee1fef8fb200907a2a3f1ded41d04fa
Reviewed-on: https://go-review.googlesource.com/c/go/+/447315
Reviewed-by: Cherry Mui <cherryyz@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Michael Pratt <mpratt@google.com>
Auto-Submit: Michael Pratt <mpratt@google.com>
The most important change here is to log output from the child, making
it easier to diagnose problems when the child 'go test' fails.
We can also eliminate the cmd.Wait goroutine by using an os.Pipe, whose
reader will return io.EOF when the child exits.
For #55022.
Change-Id: I1573ea444407d545bdca8525c9ff7b0a2baebf5e
Reviewed-on: https://go-review.googlesource.com/c/go/+/446300
Run-TryBot: Michael Pratt <mpratt@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
