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Show much more stats about the LRU caches

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Clément Renault 2024-10-08 15:29:24 +02:00
parent 2230674c0a
commit 470c2272dd
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GPG Key ID: F250A4C4E3AE5F5F
2 changed files with 98 additions and 49 deletions
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2
Cargo.lock generated
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@ -4655,7 +4655,7 @@ dependencies = [
[[package]]
name = "roaring"
version = "0.10.6"
source = "git+https://github.com/RoaringBitmap/roaring-rs?branch=clone-iter-slice#6bba84b1a47da1d6e52d5c4dc0ce8593ae4646a5"
source = "git+https://github.com/RoaringBitmap/roaring-rs?branch=clone-iter-slice#8ff028e484fb6192a0acf5a669eaf18c30cada6e"
dependencies = [
"bytemuck",
"byteorder",

145
milli/src/update/new/extract/cache.rs
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@ -1,7 +1,9 @@
use std::fmt::Write as _;
use std::mem;
use std::num::NonZeroUsize;
use grenad::{MergeFunction, Sorter};
use roaring::bitmap::Statistics;
use roaring::RoaringBitmap;
use smallvec::SmallVec;
@ -38,7 +40,7 @@ impl<MF: MergeFunction> CboCachedSorter<MF> {
pub fn insert_del_u32(&mut self, key: &[u8], n: u32) -> grenad::Result<(), MF::Error> {
match self.cache.get_mut(key) {
Some(DelAddRoaringBitmap { del, add: _ }) => {
del.get_or_insert_with(PushOptimizedBitmap::default).insert(n);
del.get_or_insert_with(RoaringBitmap::default).insert(n);
}
None => {
self.total_insertions += 1;
@ -60,7 +62,7 @@ impl<MF: MergeFunction> CboCachedSorter<MF> {
) -> grenad::Result<(), MF::Error> {
match self.cache.get_mut(key) {
Some(DelAddRoaringBitmap { del, add: _ }) => {
del.get_or_insert_with(PushOptimizedBitmap::default).union_with_bitmap(bitmap);
*del.get_or_insert_with(RoaringBitmap::default) |= bitmap;
}
None => {
self.total_insertions += 1;
@ -78,7 +80,7 @@ impl<MF: MergeFunction> CboCachedSorter<MF> {
pub fn insert_add_u32(&mut self, key: &[u8], n: u32) -> grenad::Result<(), MF::Error> {
match self.cache.get_mut(key) {
Some(DelAddRoaringBitmap { del: _, add }) => {
add.get_or_insert_with(PushOptimizedBitmap::default).insert(n);
add.get_or_insert_with(RoaringBitmap::default).insert(n);
}
None => {
self.total_insertions += 1;
@ -100,7 +102,7 @@ impl<MF: MergeFunction> CboCachedSorter<MF> {
) -> grenad::Result<(), MF::Error> {
match self.cache.get_mut(key) {
Some(DelAddRoaringBitmap { del: _, add }) => {
add.get_or_insert_with(PushOptimizedBitmap::default).union_with_bitmap(bitmap);
*add.get_or_insert_with(RoaringBitmap::default) |= bitmap;
}
None => {
self.total_insertions += 1;
@ -118,8 +120,8 @@ impl<MF: MergeFunction> CboCachedSorter<MF> {
pub fn insert_del_add_u32(&mut self, key: &[u8], n: u32) -> grenad::Result<(), MF::Error> {
match self.cache.get_mut(key) {
Some(DelAddRoaringBitmap { del, add }) => {
del.get_or_insert_with(PushOptimizedBitmap::default).insert(n);
add.get_or_insert_with(PushOptimizedBitmap::default).insert(n);
del.get_or_insert_with(RoaringBitmap::default).insert(n);
add.get_or_insert_with(RoaringBitmap::default).insert(n);
}
None => {
self.total_insertions += 1;
@ -145,21 +147,21 @@ impl<MF: MergeFunction> CboCachedSorter<MF> {
match deladd {
DelAddRoaringBitmap { del: Some(del), add: None } => {
self.cbo_buffer.clear();
CboRoaringBitmapCodec::serialize_into(&del.bitmap, &mut self.cbo_buffer);
CboRoaringBitmapCodec::serialize_into(&del, &mut self.cbo_buffer);
value_writer.insert(DelAdd::Deletion, &self.cbo_buffer)?;
}
DelAddRoaringBitmap { del: None, add: Some(add) } => {
self.cbo_buffer.clear();
CboRoaringBitmapCodec::serialize_into(&add.bitmap, &mut self.cbo_buffer);
CboRoaringBitmapCodec::serialize_into(&add, &mut self.cbo_buffer);
value_writer.insert(DelAdd::Addition, &self.cbo_buffer)?;
}
DelAddRoaringBitmap { del: Some(del), add: Some(add) } => {
self.cbo_buffer.clear();
CboRoaringBitmapCodec::serialize_into(&del.bitmap, &mut self.cbo_buffer);
CboRoaringBitmapCodec::serialize_into(&del, &mut self.cbo_buffer);
value_writer.insert(DelAdd::Deletion, &self.cbo_buffer)?;
self.cbo_buffer.clear();
CboRoaringBitmapCodec::serialize_into(&add.bitmap, &mut self.cbo_buffer);
CboRoaringBitmapCodec::serialize_into(&add, &mut self.cbo_buffer);
value_writer.insert(DelAdd::Addition, &self.cbo_buffer)?;
}
DelAddRoaringBitmap { del: None, add: None } => return Ok(()),
@ -173,78 +175,125 @@ impl<MF: MergeFunction> CboCachedSorter<MF> {
}
pub fn into_sorter(mut self) -> grenad::Result<Sorter<MF>, MF::Error> {
let mut all_n_containers = Vec::new();
let mut all_n_array_containers = Vec::new();
let mut all_n_bitset_containers = Vec::new();
let mut all_n_values_array_containers = Vec::new();
let mut all_n_values_bitset_containers = Vec::new();
let mut all_cardinality = Vec::new();
let default_arc = Lru::new(NonZeroUsize::MIN);
for (key, deladd) in mem::replace(&mut self.cache, default_arc) {
for bitmap in [&deladd.del, &deladd.add].into_iter().flatten() {
let Statistics {
n_containers,
n_array_containers,
n_bitset_containers,
n_values_array_containers,
n_values_bitset_containers,
cardinality,
..
} = bitmap.statistics();
all_n_containers.push(n_containers);
all_n_array_containers.push(n_array_containers);
all_n_bitset_containers.push(n_bitset_containers);
all_n_values_array_containers.push(n_values_array_containers);
all_n_values_bitset_containers.push(n_values_bitset_containers);
all_cardinality.push(cardinality as u32);
}
self.write_entry(key, deladd)?;
}
eprintln!(
let mut output = String::new();
for (name, mut slice) in [
("n_containers", all_n_containers),
("n_array_containers", all_n_array_containers),
("n_bitset_containers", all_n_bitset_containers),
("n_values_array_containers", all_n_values_array_containers),
("n_values_bitset_containers", all_n_values_bitset_containers),
("cardinality", all_cardinality),
] {
let _ = writeln!(&mut output, "{name} (p100) {:?}", Stats::from_slice(&mut slice));
// let _ = writeln!(&mut output, "{name} (p99) {:?}", Stats::from_slice_p99(&mut slice));
}
let _ = writeln!(
&mut output,
"LruCache stats: {} <= {KEY_SIZE} bytes ({}%) on a total of {} insertions",
self.fitted_in_key,
(self.fitted_in_key as f32 / self.total_insertions as f32) * 100.0,
self.total_insertions,
);
eprintln!("{output}");
Ok(self.sorter)
}
}
#[derive(Default, Debug)]
struct Stats {
pub len: usize,
pub average: f32,
pub mean: u32,
pub min: u32,
pub max: u32,
}
impl Stats {
fn from_slice(slice: &mut [u32]) -> Stats {
slice.sort_unstable();
Self::from_sorted_slice(slice)
}
fn from_slice_p99(slice: &mut [u32]) -> Stats {
slice.sort_unstable();
let new_len = slice.len() - (slice.len() as f32 / 100.0) as usize;
match slice.get(..new_len) {
Some(slice) => Self::from_sorted_slice(slice),
None => Stats::default(),
}
}
fn from_sorted_slice(slice: &[u32]) -> Stats {
let sum: f64 = slice.iter().map(|i| *i as f64).sum();
let average = (sum / slice.len() as f64) as f32;
let mean = *slice.len().checked_div(2).and_then(|middle| slice.get(middle)).unwrap_or(&0);
let min = *slice.first().unwrap_or(&0);
let max = *slice.last().unwrap_or(&0);
Stats { len: slice.len(), average, mean, min, max }
}
}
#[derive(Debug, Clone)]
pub struct DelAddRoaringBitmap {
pub(crate) del: Option<PushOptimizedBitmap>,
pub(crate) add: Option<PushOptimizedBitmap>,
pub(crate) del: Option<RoaringBitmap>,
pub(crate) add: Option<RoaringBitmap>,
}
impl DelAddRoaringBitmap {
fn new_del_add_u32(n: u32) -> Self {
DelAddRoaringBitmap {
del: Some(PushOptimizedBitmap::from_single(n)),
add: Some(PushOptimizedBitmap::from_single(n)),
del: Some(RoaringBitmap::from([n])),
add: Some(RoaringBitmap::from([n])),
}
}
fn new_del(bitmap: RoaringBitmap) -> Self {
DelAddRoaringBitmap { del: Some(PushOptimizedBitmap::from_bitmap(bitmap)), add: None }
DelAddRoaringBitmap { del: Some(bitmap), add: None }
}
fn new_del_u32(n: u32) -> Self {
DelAddRoaringBitmap { del: Some(PushOptimizedBitmap::from_single(n)), add: None }
DelAddRoaringBitmap { del: Some(RoaringBitmap::from([n])), add: None }
}
fn new_add(bitmap: RoaringBitmap) -> Self {
DelAddRoaringBitmap { del: None, add: Some(PushOptimizedBitmap::from_bitmap(bitmap)) }
DelAddRoaringBitmap { del: None, add: Some(bitmap) }
}
fn new_add_u32(n: u32) -> Self {
DelAddRoaringBitmap { del: None, add: Some(PushOptimizedBitmap::from_single(n)) }
}
}
#[derive(Debug, Clone, Default)]
struct PushOptimizedBitmap {
bitmap: RoaringBitmap,
}
impl PushOptimizedBitmap {
#[inline]
fn from_bitmap(bitmap: RoaringBitmap) -> PushOptimizedBitmap {
PushOptimizedBitmap { bitmap }
}
#[inline]
fn from_single(single: u32) -> PushOptimizedBitmap {
PushOptimizedBitmap { bitmap: RoaringBitmap::from([single]) }
}
#[inline]
fn insert(&mut self, n: u32) {
if !self.bitmap.push(n) {
self.bitmap.insert(n);
}
}
#[inline]
fn union_with_bitmap(&mut self, bitmap: RoaringBitmap) {
self.bitmap |= bitmap;
DelAddRoaringBitmap { del: None, add: Some(RoaringBitmap::from([n])) }
}
}