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configurable dynamic stream concurrency scalar

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Signed-off-by: Jason Volk <jason@zemos.net>
This commit is contained in:
Jason Volk 2024-12-23 04:32:28 +00:00 • committed by strawberry
parent b195107053
commit 7a6d657558
9 changed files with 144 additions and 20 deletions
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34
src/database/pool/configure.rs
View file

@ -1,8 +1,11 @@
use std::{ffi::OsStr, sync::Arc};
use conduwuit::{
debug_info,
debug, debug_info, expected,
utils::{
math::usize_from_f64,
stream,
stream::WIDTH_LIMIT,
sys::{compute::is_core_available, storage},
BoolExt,
},
@ -91,6 +94,13 @@ pub(super) fn configure(server: &Arc<Server>) -> (usize, Vec<usize>, Vec<usize>)
.sum::<usize>()
.clamp(WORKER_LIMIT.0, max_workers);
// After computing all of the above we can update the global automatic stream
// width, hopefully with a better value tailored to this system.
if config.stream_width_scale > 0.0 {
let num_queues = queue_sizes.len();
update_stream_width(server, num_queues, total_workers);
}
debug_info!(
device_name = ?device_name
.as_deref()
@ -99,8 +109,30 @@ pub(super) fn configure(server: &Arc<Server>) -> (usize, Vec<usize>, Vec<usize>)
?worker_counts,
?queue_sizes,
?total_workers,
stream_width = ?stream::automatic_width(),
"Frontend topology",
);
(total_workers, queue_sizes, topology)
}
#[allow(clippy::as_conversions, clippy::cast_precision_loss)]
fn update_stream_width(server: &Arc<Server>, num_queues: usize, total_workers: usize) {
let config = &server.config;
let scale: f64 = config.stream_width_scale.min(100.0).into();
let req_width = expected!(total_workers / num_queues).next_multiple_of(2);
let req_width = req_width as f64;
let req_width = usize_from_f64(req_width * scale)
.expect("failed to convert f64 to usize")
.clamp(WIDTH_LIMIT.0, WIDTH_LIMIT.1);
let (old_width, new_width) = stream::set_width(req_width);
debug!(
scale = ?config.stream_width_scale,
?num_queues,
?req_width,
?old_width,
?new_width,
"Updated global stream width"
);
}