Add flamegraph for some benchmarks (#1899)

Co-authored-by: Lalit Kumar Bhasin <[email protected]>

opentelemetry-appender-tracing/Cargo.toml

@@ -27,6 +27,9 @@ tracing-log = "0.2"
 async-trait = { workspace = true }
 criterion = { workspace = true }
 
+[target.'cfg(not(target_os = "windows"))'.dev-dependencies]
+pprof = { version = "0.13", features = ["flamegraph", "criterion"] }
+
 [features]
 experimental_metadata_attributes = ["dep:tracing-log"]
 logs_level_enabled = ["opentelemetry/logs_level_enabled"]

opentelemetry-appender-tracing/benches/logs.rs

@@ -21,6 +21,7 @@ use opentelemetry_appender_tracing::layer as tracing_layer;
 use opentelemetry_sdk::export::logs::{LogData, LogExporter};
 use opentelemetry_sdk::logs::{LogProcessor, LoggerProvider};
 use opentelemetry_sdk::Resource;
+use pprof::criterion::{Output, PProfProfiler};
 use tracing::error;
 use tracing_subscriber::prelude::*;
 use tracing_subscriber::Layer;
@@ -173,5 +174,16 @@ fn criterion_benchmark(c: &mut Criterion) {
  benchmark_with_noop_layer(c, false, "noop_layer_disabled");
 }
 
-criterion_group!(benches, criterion_benchmark);
+#[cfg(not(target_os = "windows"))]
+criterion_group! {
+ name = benches;
+ config = Criterion::default().with_profiler(PProfProfiler::new(100, Output::Flamegraph(None)));
+ targets = criterion_benchmark
+}
+#[cfg(target_os = "windows")]
+criterion_group! {
+ name = benches;
+ config = Criterion::default();
+ targets = criterion_benchmark
+}
 criterion_main!(benches);

opentelemetry-sdk/benches/metric_counter.rs

@@ -18,6 +18,7 @@ use opentelemetry::{
  KeyValue,
 };
 use opentelemetry_sdk::metrics::{ManualReader, SdkMeterProvider};
+use pprof::criterion::{Output, PProfProfiler};
 use rand::{
  rngs::{self},
  Rng, SeedableRng,
@@ -155,6 +156,16 @@ fn counter_add(c: &mut Criterion) {
  });
 }
 
-criterion_group!(benches, criterion_benchmark);
-
+#[cfg(not(target_os = "windows"))]
+criterion_group! {
+ name = benches;
+ config = Criterion::default().with_profiler(PProfProfiler::new(100, Output::Flamegraph(None)));
+ targets = criterion_benchmark
+}
+#[cfg(target_os = "windows")]
+criterion_group! {
+ name = benches;
+ config = Criterion::default();
+ targets = criterion_benchmark
+}
 criterion_main!(benches);