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Proposal #74609
Change-Id: I97a754b128aac1bc5b7b9ab607fcd5bb390058c8
GitHub-Last-Rev: 60f2a192badf415112246de8bc6c0084085314f6
GitHub-Pull-Request: golang/go#74622
Reviewed-on: https://go-review.googlesource.com/c/go/+/688335
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: t hepudds <thepudds1460@gmail.com>
Auto-Submit: Michael Knyszek <mknyszek@google.com>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Reviewed-by: Carlos Amedee <carlos@golang.org>
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Change-Id: Ifb4844efddcb0369b0302eeab72394eeaf5c8072
Reviewed-on: https://go-review.googlesource.com/c/go/+/540022
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Auto-Submit: Michael Knyszek <mknyszek@google.com>
Reviewed-by: Heschi Kreinick <heschi@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: shuang cui <imcusg@gmail.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
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For generic functions, the previous CL makes it record the full
instantiated symbol name in the runtime func table. This CL
changes the pprof package to use that name in CPU profile. This
way, it matches the symbol name the compiler sees, so it can apply
PGO.
TODO: add a test.
Fixes #58712.
Change-Id: If40db01cbef5f73c279adcc9c290a757ef6955b6
Reviewed-on: https://go-review.googlesource.com/c/go/+/491678
Reviewed-by: Michael Pratt <mpratt@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Run-TryBot: Cherry Mui <cherryyz@google.com>
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Now that we plumb the start line to the runtime, we can include in pprof
files. Since runtime.Frame.startLine is not (currently) exported, we
need a runtime helper to get the value.
For #55022.
Updates #56135.
Change-Id: Ifc5b68a7b7170fd7895e4099deb24df7977b22ea
Reviewed-on: https://go-review.googlesource.com/c/go/+/438255
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Run-TryBot: Michael Pratt <mpratt@google.com>
Reviewed-by: Austin Clements <austin@google.com>
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When generating stacks, the runtime automatically expands inline
functions to inline all inline frames in the stack. However, due to the
stack size limit, the final frame may be truncated in the middle of
several inline frames at the same location.
As-is, we assume that the final frame is a normal function, and emit and
cache a Location for it. If we later receive a complete stack frame, we
will first use the cached Location for the inlined function and then
generate a new Location for the "caller" frame, in violation of the
pprof requirement to merge inlined functions into the same Location.
As a result, we:
1. Nondeterministically may generate a profile with the different stacks
combined or split, depending on which is encountered first. This is
particularly problematic when performing a diff of profiles.
2. When split stacks are generated, we lose the inlining information.
We avoid both of these problems by performing a second expansion of the
last stack frame to recover additional inline frames that may have been
lost. This expansion is a bit simpler than the one done by the runtime
because we don't have to handle skipping, and we know that the last
emitted frame is not an elided wrapper, since it by definition is
already included in the stack.
Fixes #37446
Change-Id: If3ca2af25b21d252cf457cc867dd932f107d4c61
Reviewed-on: https://go-review.googlesource.com/c/go/+/221577
Run-TryBot: Michael Pratt <mpratt@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
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Document goroutine label inheritance. Goroutine labels are copied upon
goroutine creation and there is a test enforcing this, but it was not
mentioned in the docstrings for `Do` or `SetGoroutineLabels`.
Add notes to both of those functions' docstrings so it's clear that one
does not need to set labels as soon as a new goroutine is spawned if
they want to propagate tags.
Updates #32223
Updates #23458
Change-Id: Idfa33031af0104b884b03ca855ac82b98500c8b4
Reviewed-on: https://go-review.googlesource.com/c/go/+/189317
Reviewed-by: Ian Lance Taylor <iant@golang.org>
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This change defines runtime/pprof.SetGoroutineLabels and runtime/pprof.Do, which
are used to set profiler labels on goroutines. The change defines functions
in the runtime for setting and getting profile labels, and sets and unsets
profile labels when goroutines are created and deleted. The change also adds
the package runtime/internal/proflabel, which defines the structure the runtime
uses to store profile labels.
Change-Id: I747a4400141f89b6e8160dab6aa94ca9f0d4c94d
Reviewed-on: https://go-review.googlesource.com/34198
Run-TryBot: Michael Matloob <matloob@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Russ Cox <rsc@golang.org>
Reviewed-on: https://go-review.googlesource.com/35010
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