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Refactor memory handling and add markers

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Louis Dureuil 2024-01-23 11:47:22 +01:00
parent ca8990394e
commit 256538ccb9
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2 changed files with 168 additions and 112 deletions
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23
tracing-trace/src/entry.rs
View File

@ -1,5 +1,4 @@
use std::borrow::Cow;
use std::ops::Sub;
use serde::{Deserialize, Serialize};
use tracing::span::Id as TracingId;
@ -123,18 +122,16 @@ impl From<stats_alloc::Stats> for MemoryStats {
}
}
impl Sub for MemoryStats {
type Output = Self;
fn sub(self, other: Self) -> Self::Output {
Self {
allocations: self.allocations - other.allocations,
deallocations: self.deallocations - other.deallocations,
reallocations: self.reallocations - other.reallocations,
bytes_allocated: self.bytes_allocated - other.bytes_allocated,
bytes_deallocated: self.bytes_deallocated - other.bytes_deallocated,
bytes_reallocated: self.bytes_reallocated - other.bytes_reallocated,
}
impl MemoryStats {
pub fn checked_sub(self, other: Self) -> Option<Self> {
Some(Self {
allocations: self.allocations.checked_sub(other.allocations)?,
deallocations: self.deallocations.checked_sub(other.deallocations)?,
reallocations: self.reallocations.checked_sub(other.reallocations)?,
bytes_allocated: self.bytes_allocated.checked_sub(other.bytes_allocated)?,
bytes_deallocated: self.bytes_deallocated.checked_sub(other.bytes_deallocated)?,
bytes_reallocated: self.bytes_reallocated.checked_sub(other.bytes_reallocated)?,
})
}
}

249
tracing-trace/src/processor/firefox_profiler.rs
View File

@ -1,9 +1,9 @@
use std::collections::HashMap;
use fxprof_processed_profile::{
CategoryPairHandle, CpuDelta, Frame, FrameFlags, FrameInfo, MarkerDynamicField,
MarkerFieldFormat, MarkerLocation, MarkerSchema, MarkerSchemaField, Profile, ProfilerMarker,
ReferenceTimestamp, SamplingInterval, StringHandle, Timestamp,
CategoryPairHandle, CounterHandle, CpuDelta, Frame, FrameFlags, FrameInfo, MarkerDynamicField,
MarkerFieldFormat, MarkerLocation, MarkerSchema, MarkerSchemaField, ProcessHandle, Profile,
ProfilerMarker, ReferenceTimestamp, SamplingInterval, StringHandle, Timestamp,
};
use serde_json::json;
@ -33,18 +33,8 @@ pub fn to_firefox_profile<R: std::io::Read>(
let subcategory = profile.add_subcategory(category, "subcategory");
let mut current_memory = MemoryStats::default();
let init_allocations = |profile: &mut Profile| {
profile.add_counter(main, "mimmalloc", "Memory", "Amount of allocation calls")
};
let init_deallocations = |profile: &mut Profile| {
profile.add_counter(main, "mimmalloc", "Memory", "Amount of deallocation calls")
};
let init_reallocations = |profile: &mut Profile| {
profile.add_counter(main, "mimmalloc", "Memory", "Amount of reallocation calls")
};
let mut allocations_counter = None;
let mut deallocations_counter = None;
let mut reallocations_counter = None;
let mut memory_counters = None;
for entry in trace {
let entry = entry?;
@ -75,59 +65,29 @@ pub fn to_firefox_profile<R: std::io::Read>(
continue;
};
*status = SpanStatus::Inside(time);
*status = SpanStatus::Inside { time, memory };
last_timestamp = Timestamp::from_nanos_since_reference(time.as_nanos() as u64);
if let Some(stats) = memory {
let MemoryStats {
allocations,
deallocations,
reallocations,
bytes_allocated,
bytes_deallocated,
bytes_reallocated,
} = current_memory - stats;
let counter =
*allocations_counter.get_or_insert_with(|| init_allocations(&mut profile));
profile.add_counter_sample(
counter,
add_memory_samples(
&mut profile,
main,
memory,
last_timestamp,
bytes_allocated as f64,
allocations.try_into().unwrap(),
&mut memory_counters,
&mut current_memory,
);
let counter = *deallocations_counter
.get_or_insert_with(|| init_deallocations(&mut profile));
profile.add_counter_sample(
counter,
last_timestamp,
bytes_deallocated as f64,
deallocations.try_into().unwrap(),
);
let counter = *reallocations_counter
.get_or_insert_with(|| init_reallocations(&mut profile));
profile.add_counter_sample(
counter,
last_timestamp,
bytes_reallocated as f64,
reallocations.try_into().unwrap(),
);
current_memory = stats;
}
}
Entry::SpanExit(SpanExit { id, time, memory }) => {
let (span, status) = spans.get_mut(&id).unwrap();
let SpanStatus::Inside(begin) = status else {
let SpanStatus::Inside { time: begin, memory: begin_memory } = status else {
continue;
};
last_timestamp = Timestamp::from_nanos_since_reference(time.as_nanos() as u64);
let begin = *begin;
let begin_memory = *begin_memory;
*status = SpanStatus::Outside;
@ -151,49 +111,20 @@ pub fn to_firefox_profile<R: std::io::Read>(
1,
);
if let Some(stats) = memory {
let MemoryStats {
allocations,
deallocations,
reallocations,
bytes_allocated,
bytes_deallocated,
bytes_reallocated,
} = current_memory - stats;
let counter =
*allocations_counter.get_or_insert_with(|| init_allocations(&mut profile));
profile.add_counter_sample(
counter,
add_memory_samples(
&mut profile,
main,
memory,
last_timestamp,
bytes_allocated as f64,
allocations.try_into().unwrap(),
&mut memory_counters,
&mut current_memory,
);
let counter = *deallocations_counter
.get_or_insert_with(|| init_deallocations(&mut profile));
profile.add_counter_sample(
counter,
last_timestamp,
bytes_deallocated as f64,
deallocations.try_into().unwrap(),
);
let counter = *reallocations_counter
.get_or_insert_with(|| init_reallocations(&mut profile));
profile.add_counter_sample(
counter,
last_timestamp,
bytes_reallocated as f64,
reallocations.try_into().unwrap(),
);
current_memory = stats;
}
let (callsite, _) = calls.get(&span.call_id).unwrap();
let marker = SpanMarker { callsite, span: &span };
let memory_delta =
begin_memory.zip(memory).and_then(|(begin, end)| end.checked_sub(begin));
let marker = SpanMarker { callsite, span: &span, memory_delta };
profile.add_marker_with_stack(
*thread_handle,
@ -216,6 +147,77 @@ pub fn to_firefox_profile<R: std::io::Read>(
Ok(profile)
}
struct MemoryCounterHandles {
allocations: CounterHandle,
deallocations: CounterHandle,
reallocations: CounterHandle,
}
impl MemoryCounterHandles {
fn new(profile: &mut Profile, main: ProcessHandle) -> Self {
let allocations =
profile.add_counter(main, "mimmalloc", "Memory", "Amount of allocated memory");
let deallocations =
profile.add_counter(main, "mimmalloc", "Memory", "Amount of deallocated memory");
let reallocations =
profile.add_counter(main, "mimmalloc", "Memory", "Amount of reallocated memory");
Self { allocations, deallocations, reallocations }
}
}
fn add_memory_samples(
profile: &mut Profile,
main: ProcessHandle,
memory: Option<MemoryStats>,
last_timestamp: Timestamp,
memory_counters: &mut Option<MemoryCounterHandles>,
current_memory: &mut MemoryStats,
) {
let Some(stats) = memory else {
return;
};
let Some(MemoryStats {
allocations,
deallocations,
reallocations,
bytes_allocated,
bytes_deallocated,
bytes_reallocated,
}) = stats.checked_sub(*current_memory)
else {
// since spans are recorded out-of-order it is possible they are not always monotonic.
// We ignore spans that made no difference.
return;
};
let memory_counters =
memory_counters.get_or_insert_with(|| MemoryCounterHandles::new(profile, main));
profile.add_counter_sample(
memory_counters.allocations,
last_timestamp,
bytes_allocated as f64,
allocations.try_into().unwrap(),
);
profile.add_counter_sample(
memory_counters.deallocations,
last_timestamp,
bytes_deallocated as f64,
deallocations.try_into().unwrap(),
);
profile.add_counter_sample(
memory_counters.reallocations,
last_timestamp,
bytes_reallocated as f64,
reallocations.try_into().unwrap(),
);
*current_memory = stats;
}
fn to_timestamp(time: std::time::Duration) -> Timestamp {
Timestamp::from_nanos_since_reference(time.as_nanos() as u64)
}
@ -252,12 +254,13 @@ fn make_frame(
#[derive(Debug, Clone, Copy)]
enum SpanStatus {
Outside,
Inside(std::time::Duration),
Inside { time: std::time::Duration, memory: Option<MemoryStats> },
}
struct SpanMarker<'a> {
span: &'a NewSpan,
callsite: &'a NewCallsite,
memory_delta: Option<MemoryStats>,
}
impl<'a> ProfilerMarker for SpanMarker<'a> {
@ -295,6 +298,42 @@ impl<'a> ProfilerMarker for SpanMarker<'a> {
format: MarkerFieldFormat::Integer,
searchable: true,
}),
MarkerSchemaField::Dynamic(MarkerDynamicField {
key: "allocations",
label: "Number of allocation operations while this function was executing",
format: MarkerFieldFormat::Integer,
searchable: false,
}),
MarkerSchemaField::Dynamic(MarkerDynamicField {
key: "deallocations",
label: "Number of deallocation operations while this function was executing",
format: MarkerFieldFormat::Integer,
searchable: false,
}),
MarkerSchemaField::Dynamic(MarkerDynamicField {
key: "reallocations",
label: "Number of reallocation operations while this function was executing",
format: MarkerFieldFormat::Integer,
searchable: false,
}),
MarkerSchemaField::Dynamic(MarkerDynamicField {
key: "allocated_bytes",
label: "Number of allocated bytes while this function was executing",
format: MarkerFieldFormat::Bytes,
searchable: false,
}),
MarkerSchemaField::Dynamic(MarkerDynamicField {
key: "deallocated_bytes",
label: "Number of deallocated bytes while this function was executing",
format: MarkerFieldFormat::Bytes,
searchable: false,
}),
MarkerSchemaField::Dynamic(MarkerDynamicField {
key: "reallocated_bytes",
label: "Number of reallocated bytes while this function was executing",
format: MarkerFieldFormat::Bytes,
searchable: false,
}),
];
MarkerSchema {
@ -317,13 +356,33 @@ impl<'a> ProfilerMarker for SpanMarker<'a> {
let module_path = self.callsite.module_path.as_deref();
let span_id = self.span.id;
let thread_id = self.span.thread_id;
json!({
let mut value = json!({
"type": Self::MARKER_TYPE_NAME,
"filename": filename,
"line": line,
"module_path": module_path,
"span_id": span_id,
"thread_id": thread_id,
})
});
if let Some(MemoryStats {
allocations,
deallocations,
reallocations,
bytes_allocated,
bytes_deallocated,
bytes_reallocated,
}) = self.memory_delta
{
value["allocations"] = json!(allocations);
value["deallocations"] = json!(deallocations);
value["reallocations"] = json!(reallocations);
value["bytes_allocated"] = json!(bytes_allocated);
value["bytes_deallocated"] = json!(bytes_deallocated);
value["bytes_reallocated"] = json!(bytes_reallocated);
}
value
}
}