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use std::{
collections::VecDeque,
fmt::{Debug, Formatter},
sync::{Arc, OnceLock},
};
use rayon::iter::{IntoParallelRefIterator, ParallelIterator};
use crate::{
FxIndexMap,
bottom_up::build_bottom_up_graph,
span::{SpanGraph, SpanGraphEvent},
span_bottom_up_ref::SpanBottomUpRef,
span_ref::{GroupNameToDirectAndRecusiveSpans, SpanRef},
store::{SpanId, Store},
timestamp::Timestamp,
};
#[derive(Clone)]
pub struct SpanGraphRef<'a> {
pub(crate) graph: Arc<SpanGraph>,
pub(crate) store: &'a Store,
}
impl<'a> SpanGraphRef<'a> {
pub fn first_span(&self) -> SpanRef<'a> {
let index = self.graph.root_spans[0].get();
SpanRef {
span: &self.store.spans[index],
store: self.store,
index,
}
}
pub fn id(&self) -> SpanId {
unsafe { SpanId::new_unchecked((self.first_span().index << 1) | 1) }
}
pub fn nice_name(&self) -> (&str, &str) {
if self.count() == 1 {
self.first_span().nice_name()
} else {
self.first_span().group_name()
}
}
pub fn count(&self) -> usize {
self.graph.root_spans.len() + self.graph.recursive_spans.len()
}
pub fn root_spans(&self) -> impl DoubleEndedIterator<Item = SpanRef<'a>> + '_ {
self.graph.root_spans.iter().map(move |span| SpanRef {
span: &self.store.spans[span.get()],
store: self.store,
index: span.get(),
})
}
fn recursive_spans(&self) -> impl DoubleEndedIterator<Item = SpanRef<'a>> + '_ {
self.graph
.root_spans
.iter()
.chain(self.graph.recursive_spans.iter())
.map(move |span| SpanRef {
span: &self.store.spans[span.get()],
store: self.store,
index: span.get(),
})
}
fn recursive_spans_par(&self) -> impl ParallelIterator<Item = SpanRef<'a>> + '_ {
self.graph
.root_spans
.par_iter()
.chain(self.graph.recursive_spans.par_iter())
.map(move |span| SpanRef {
span: &self.store.spans[span.get()],
store: self.store,
index: span.get(),
})
}
fn events_vec_ref(&self) -> &Vec<SpanGraphEvent> {
self.graph.events.get_or_init(|| {
if self.count() == 1 {
let _ = self.first_span().graph();
self.first_span().extra().graph.get().unwrap().clone()
} else {
let self_group = self.first_span().group_name();
let mut map: GroupNameToDirectAndRecusiveSpans = FxIndexMap::default();
let mut queue = VecDeque::with_capacity(8);
for span in self.recursive_spans() {
for span in span.children() {
let name = span.group_name();
if name != self_group {
let (list, recursive_list) = map.entry(name).or_default();
list.push(span.index());
queue.push_back(span);
while let Some(child) = queue.pop_front() {
for nested_child in child.children() {
let nested_name = nested_child.group_name();
if name == nested_name {
recursive_list.push(nested_child.index());
queue.push_back(nested_child);
}
}
}
}
}
}
event_map_to_list(map)
}
})
}
pub fn events(&self) -> impl DoubleEndedIterator<Item = SpanGraphEventRef<'a>> + '_ {
self.events_vec_ref().iter().map(|graph| match graph {
SpanGraphEvent::SelfTime { duration } => SpanGraphEventRef::SelfTime {
duration: *duration,
},
SpanGraphEvent::Child { child } => SpanGraphEventRef::Child {
graph: SpanGraphRef {
graph: child.clone(),
store: self.store,
},
},
})
}
pub fn events_par(&self) -> impl ParallelIterator<Item = SpanGraphEventRef<'a>> + '_ {
self.events_vec_ref().par_iter().map(|graph| match graph {
SpanGraphEvent::SelfTime { duration } => SpanGraphEventRef::SelfTime {
duration: *duration,
},
SpanGraphEvent::Child { child } => SpanGraphEventRef::Child {
graph: SpanGraphRef {
graph: child.clone(),
store: self.store,
},
},
})
}
pub fn children(&self) -> impl DoubleEndedIterator<Item = SpanGraphRef<'a>> + '_ {
self.events().filter_map(|event| match event {
SpanGraphEventRef::SelfTime { .. } => None,
SpanGraphEventRef::Child { graph: span } => Some(span),
})
}
pub fn children_par(&self) -> impl ParallelIterator<Item = SpanGraphRef<'a>> + '_ {
self.events_par().filter_map(|event| match event {
SpanGraphEventRef::SelfTime { .. } => None,
SpanGraphEventRef::Child { graph: span } => Some(span),
})
}
pub fn bottom_up(&self) -> impl Iterator<Item = SpanBottomUpRef<'a>> + '_ {
self.graph
.bottom_up
.get_or_init(|| build_bottom_up_graph(self.root_spans()))
.iter()
.map(move |bottom_up| SpanBottomUpRef {
bottom_up: bottom_up.clone(),
store: self.store,
})
}
pub fn max_depth(&self) -> u32 {
*self.graph.max_depth.get_or_init(|| {
self.children()
.map(|graph| graph.max_depth() + 1)
.max()
.unwrap_or_default()
})
}
pub fn self_time(&self) -> Timestamp {
*self.graph.self_time.get_or_init(|| {
self.recursive_spans()
.map(|span| span.self_time())
.reduce(|a, b| a + b)
.unwrap_or_default()
})
}
pub fn total_time(&self) -> Timestamp {
*self.graph.total_time.get_or_init(|| {
self.children()
.map(|graph| graph.total_time())
.reduce(|a, b| a + b)
.unwrap_or_default()
+ self.self_time()
})
}
pub fn self_allocations(&self) -> u64 {
*self.graph.self_allocations.get_or_init(|| {
self.recursive_spans()
.map(|span| span.self_allocations())
.reduce(|a, b| a + b)
.unwrap_or_default()
})
}
pub fn self_deallocations(&self) -> u64 {
*self.graph.self_deallocations.get_or_init(|| {
self.recursive_spans()
.map(|span| span.self_deallocations())
.reduce(|a, b| a + b)
.unwrap_or_default()
})
}
pub fn self_persistent_allocations(&self) -> u64 {
*self.graph.self_persistent_allocations.get_or_init(|| {
self.recursive_spans()
.map(|span| span.self_persistent_allocations())
.reduce(|a, b| a + b)
.unwrap_or_default()
})
}
pub fn self_allocation_count(&self) -> u64 {
*self.graph.self_allocation_count.get_or_init(|| {
self.recursive_spans()
.map(|span| span.self_allocation_count())
.reduce(|a, b| a + b)
.unwrap_or_default()
})
}
pub fn self_span_count(&self) -> u64 {
self.graph.root_spans.len() as u64 + self.graph.recursive_spans.len() as u64
}
pub fn total_allocations(&self) -> u64 {
*self.graph.total_allocations.get_or_init(|| {
self.children()
.map(|graph| graph.total_allocations())
.reduce(|a, b| a + b)
.unwrap_or_default()
+ self.self_allocations()
})
}
pub fn total_deallocations(&self) -> u64 {
*self.graph.total_deallocations.get_or_init(|| {
self.children()
.map(|graph| graph.total_deallocations())
.reduce(|a, b| a + b)
.unwrap_or_default()
+ self.self_deallocations()
})
}
pub fn total_persistent_allocations(&self) -> u64 {
*self.graph.total_persistent_allocations.get_or_init(|| {
self.children()
.map(|graph| graph.total_persistent_allocations())
.reduce(|a, b| a + b)
.unwrap_or_default()
+ self.self_persistent_allocations()
})
}
pub fn total_allocation_count(&self) -> u64 {
*self.graph.total_allocation_count.get_or_init(|| {
self.children()
.map(|graph| graph.total_allocation_count())
.reduce(|a, b| a + b)
.unwrap_or_default()
+ self.self_allocation_count()
})
}
pub fn total_span_count(&self) -> u64 {
*self.graph.total_span_count.get_or_init(|| {
self.children()
.map(|graph| graph.total_span_count())
.reduce(|a, b| a + b)
.unwrap_or_default()
+ self.self_span_count()
})
}
pub fn corrected_self_time(&self) -> Timestamp {
*self.graph.corrected_self_time.get_or_init(|| {
self.recursive_spans_par()
.map(|span| span.corrected_self_time())
.sum::<Timestamp>()
})
}
pub fn corrected_total_time(&self) -> Timestamp {
*self.graph.corrected_total_time.get_or_init(|| {
self.children_par()
.map(|graph| graph.corrected_total_time())
.sum::<Timestamp>()
+ self.corrected_self_time()
})
}
}
pub fn event_map_to_list(map: GroupNameToDirectAndRecusiveSpans) -> Vec<SpanGraphEvent> {
map.into_iter()
.map(|(_, (root_spans, recursive_spans))| {
let graph = SpanGraph {
root_spans,
recursive_spans,
max_depth: OnceLock::new(),
events: OnceLock::new(),
self_time: OnceLock::new(),
self_allocations: OnceLock::new(),
self_deallocations: OnceLock::new(),
self_persistent_allocations: OnceLock::new(),
self_allocation_count: OnceLock::new(),
total_time: OnceLock::new(),
total_allocations: OnceLock::new(),
total_deallocations: OnceLock::new(),
total_persistent_allocations: OnceLock::new(),
total_allocation_count: OnceLock::new(),
total_span_count: OnceLock::new(),
corrected_self_time: OnceLock::new(),
corrected_total_time: OnceLock::new(),
bottom_up: OnceLock::new(),
};
SpanGraphEvent::Child {
child: Arc::new(graph),
}
})
.collect()
}
impl Debug for SpanGraphRef<'_> {
fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
f.debug_struct("SpanGraphRef")
.field("id", &self.id())
.field("name", &self.nice_name())
.field("count", &self.count())
.field("max_depth", &self.max_depth())
.field("self_time", &self.self_time())
.field("self_allocations", &self.self_allocations())
.field("total_time", &self.total_time())
.field("total_allocations", &self.total_allocations())
.finish()
}
}
// TODO(sokra) use events instead of children for visualizing span graphs
#[allow(dead_code)]
#[derive(Clone)]
pub enum SpanGraphEventRef<'a> {
SelfTime { duration: Timestamp },
Child { graph: SpanGraphRef<'a> },
}
impl SpanGraphEventRef<'_> {
pub fn corrected_total_time(&self) -> Timestamp {
match self {
SpanGraphEventRef::SelfTime { duration } => *duration,
SpanGraphEventRef::Child { graph } => graph.corrected_total_time(),
}
}
pub fn total_time(&self) -> Timestamp {
match self {
SpanGraphEventRef::SelfTime { duration } => *duration,
SpanGraphEventRef::Child { graph } => graph.total_time(),
}
}
pub fn total_allocations(&self) -> u64 {
match self {
SpanGraphEventRef::SelfTime { .. } => 0,
SpanGraphEventRef::Child { graph } => graph.total_allocations(),
}
}
pub fn total_deallocations(&self) -> u64 {
match self {
SpanGraphEventRef::SelfTime { .. } => 0,
SpanGraphEventRef::Child { graph } => graph.total_deallocations(),
}
}
pub fn total_persistent_allocations(&self) -> u64 {
match self {
SpanGraphEventRef::SelfTime { .. } => 0,
SpanGraphEventRef::Child { graph } => graph.total_persistent_allocations(),
}
}
pub fn total_allocation_count(&self) -> u64 {
match self {
SpanGraphEventRef::SelfTime { .. } => 0,
SpanGraphEventRef::Child { graph } => graph.total_allocation_count(),
}
}
pub fn total_span_count(&self) -> u64 {
match self {
SpanGraphEventRef::SelfTime { .. } => 0,
SpanGraphEventRef::Child { graph } => graph.total_span_count(),
}
}
}
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