[clang] a5bf028 - [TimeProfiler] Emit real process ID and thread names
Sergej Jaskiewicz via cfe-commits
cfe-commits at lists.llvm.org
Wed Apr 22 14:13:22 PDT 2020
Author: Sergej Jaskiewicz
Date: 2020-04-23T00:12:51+03:00
New Revision: a5bf02815d8b8d1a76682a63281561f076968dae
URL: https://github.com/llvm/llvm-project/commit/a5bf02815d8b8d1a76682a63281561f076968dae
DIFF: https://github.com/llvm/llvm-project/commit/a5bf02815d8b8d1a76682a63281561f076968dae.diff
LOG: [TimeProfiler] Emit real process ID and thread names
Differential Revision: https://reviews.llvm.org/D78027
Added:
Modified:
clang/test/Driver/check-time-trace.cpp
lld/test/ELF/time-trace.s
llvm/lib/Support/TimeProfiler.cpp
Removed:
################################################################################
diff --git a/clang/test/Driver/check-time-trace.cpp b/clang/test/Driver/check-time-trace.cpp
index bff2c1984daa..1484462b72bb 100644
--- a/clang/test/Driver/check-time-trace.cpp
+++ b/clang/test/Driver/check-time-trace.cpp
@@ -14,6 +14,7 @@
// CHECK-NEXT: "ts":
// CHECK: "name": "clang{{.*}}"
// CHECK: "name": "process_name"
+// CHECK: "name": "thread_name"
template <typename T>
struct Struct {
diff --git a/lld/test/ELF/time-trace.s b/lld/test/ELF/time-trace.s
index 74311a984110..8085a256649e 100644
--- a/lld/test/ELF/time-trace.s
+++ b/lld/test/ELF/time-trace.s
@@ -34,6 +34,7 @@
# Check process_name entry field
# CHECK: "name": "ld.lld{{(.exe)?}}"
# CHECK: "name": "process_name"
+# CHECK: "name": "thread_name"
.globl _start
_start:
diff --git a/llvm/lib/Support/TimeProfiler.cpp b/llvm/lib/Support/TimeProfiler.cpp
index 510f763b8fe3..c907c1aaf983 100644
--- a/llvm/lib/Support/TimeProfiler.cpp
+++ b/llvm/lib/Support/TimeProfiler.cpp
@@ -16,6 +16,7 @@
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/JSON.h"
#include "llvm/Support/Path.h"
+#include "llvm/Support/Process.h"
#include "llvm/Support/Threading.h"
#include <algorithm>
#include <cassert>
@@ -75,7 +76,10 @@ struct Entry {
struct llvm::TimeTraceProfiler {
TimeTraceProfiler(unsigned TimeTraceGranularity = 0, StringRef ProcName = "")
: StartTime(steady_clock::now()), ProcName(ProcName),
- Tid(llvm::get_threadid()), TimeTraceGranularity(TimeTraceGranularity) {}
+ Pid(sys::Process::getProcessId()), Tid(llvm::get_threadid()),
+ TimeTraceGranularity(TimeTraceGranularity) {
+ llvm::get_thread_name(ThreadName);
+ }
void begin(std::string Name, llvm::function_ref<std::string()> Detail) {
Stack.emplace_back(steady_clock::now(), TimePointType(), std::move(Name),
@@ -138,8 +142,8 @@ struct llvm::TimeTraceProfiler {
auto StartUs = E.getFlameGraphStartUs(StartTime);
auto DurUs = E.getFlameGraphDurUs();
- J.object([&]{
- J.attribute("pid", 1);
+ J.object([&] {
+ J.attribute("pid", Pid);
J.attribute("tid", int64_t(Tid));
J.attribute("ph", "X");
J.attribute("ts", StartUs);
@@ -194,8 +198,8 @@ struct llvm::TimeTraceProfiler {
auto DurUs = duration_cast<microseconds>(Total.second.second).count();
auto Count = AllCountAndTotalPerName[Total.first].first;
- J.object([&]{
- J.attribute("pid", 1);
+ J.object([&] {
+ J.attribute("pid", Pid);
J.attribute("tid", int64_t(TotalTid));
J.attribute("ph", "X");
J.attribute("ts", 0);
@@ -210,16 +214,23 @@ struct llvm::TimeTraceProfiler {
++TotalTid;
}
- // Emit metadata event with process name.
- J.object([&] {
- J.attribute("cat", "");
- J.attribute("pid", 1);
- J.attribute("tid", 0);
- J.attribute("ts", 0);
- J.attribute("ph", "M");
- J.attribute("name", "process_name");
- J.attributeObject("args", [&] { J.attribute("name", ProcName); });
- });
+ auto writeMetadataEvent = [&](const char *Name, uint64_t Tid,
+ StringRef arg) {
+ J.object([&] {
+ J.attribute("cat", "");
+ J.attribute("pid", Pid);
+ J.attribute("tid", int64_t(Tid));
+ J.attribute("ts", 0);
+ J.attribute("ph", "M");
+ J.attribute("name", Name);
+ J.attributeObject("args", [&] { J.attribute("name", arg); });
+ });
+ };
+
+ writeMetadataEvent("process_name", Tid, ProcName);
+ writeMetadataEvent("thread_name", Tid, ThreadName);
+ for (const TimeTraceProfiler *TTP : ThreadTimeTraceProfilerInstances)
+ writeMetadataEvent("thread_name", TTP->Tid, TTP->ThreadName);
J.arrayEnd();
J.attributeEnd();
@@ -231,6 +242,8 @@ struct llvm::TimeTraceProfiler {
StringMap<CountAndDurationType> CountAndTotalPerName;
const TimePointType StartTime;
const std::string ProcName;
+ const sys::Process::Pid Pid;
+ SmallString<0> ThreadName;
const uint64_t Tid;
// Minimum time granularity (in microseconds)
More information about the cfe-commits
mailing list