Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Pallet parameters account for all parameters read weight #8

Merged
Merged
Show file tree
Hide file tree
Changes from 5 commits
Commits
File filter

Filter by extension

Filter by extension


Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
1 change: 1 addition & 0 deletions Cargo.lock

Some generated files are not rendered by default. Learn more about how customized files appear on GitHub.

2 changes: 2 additions & 0 deletions substrate/frame/parameters/Cargo.toml
Original file line number Diff line number Diff line change
Expand Up @@ -19,6 +19,7 @@ frame-system = { path = "../system", default-features = false }
sp-core = { path = "../../primitives/core", default-features = false }
sp-runtime = { path = "../../primitives/runtime", default-features = false }
sp-std = { path = "../../primitives/std", default-features = false }
cumulus-primitives-storage-weight-reclaim = { path = "../../../cumulus/primitives/storage-weight-reclaim", default-features = false}
frame-benchmarking = { path = "../benchmarking", default-features = false, optional = true }

[dev-dependencies]
Expand All @@ -39,6 +40,7 @@ std = [
"sp-core/std",
"sp-runtime/std",
"sp-std/std",
"cumulus-primitives-storage-weight-reclaim/std",
]
runtime-benchmarks = [
"frame-benchmarking/runtime-benchmarks",
Expand Down
18 changes: 18 additions & 0 deletions substrate/frame/parameters/src/lib.rs
Original file line number Diff line number Diff line change
Expand Up @@ -125,6 +125,7 @@ use frame_support::traits::{
dynamic_params::{AggregatedKeyValue, IntoKey, Key, RuntimeParameterStore, TryIntoKey},
EnsureOriginWithArg,
};
use cumulus_primitives_storage_weight_reclaim::get_proof_size;

mod benchmarking;
#[cfg(test)]
Expand Down Expand Up @@ -167,6 +168,23 @@ pub mod pallet {
type WeightInfo: WeightInfo;
}

#[pallet::hooks]
impl<T: Config> Hooks<BlockNumberFor<T>> for Pallet<T> {
fn on_initialize(_: BlockNumberFor<T>) -> Weight {
let proof_size_before: u64 = get_proof_size().unwrap_or(0);

let items = Parameters::<T>::iter().count() as u64;
Copy link

@RomarQ RomarQ Aug 2, 2024

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Looking at the support/procedural/src/dynamic_params.rs in polkadot-sdk, I do not see any storage being set for the initial values (it fallbacks to the defaults when storage is not present). Instead we should get the length from T::RuntimeParameters::default(), because the storage will be empty in the benchmarks.

impl #scrate::__private::Get<#value_types> for #key_names {

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

I do not see any insert for the initial values

We don't need to insert initial values in production, only in benchmark setup (for the on_initialize benchmark scenario that still need to be added in this PR)

Copy link

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

I still do not agree with the need for a on_initialize hook here. Also Parameters::<T>::iter() will be empty until set_parameter is called.

Copy link
Author

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Not all parameter usage is captured by our benchmarks. For instance, some parameters may be read within xcm or in other unaccounted areas. As a result, we can't rely solely on benchmark coverage to determine parameter impact.
To mitigate potential issues, we should assume that all parameters stored in each block will be read.

This approach helps us avoid hitting the proof size limit and prevents our chain from stalling, which would otherwise require recovery through relay chain governance.

Copy link
Author

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Parameters::<T>::iter() initially will be empty, but as we add more and more parameters it will report all the stored ones


let proof_size_after: u64 = get_proof_size().unwrap_or(0);

let proof_size_diff = proof_size_after.saturating_sub(proof_size_before);

Weight::zero()
.saturating_add(T::DbWeight::get().reads(items))
.saturating_add(Weight::from_parts(0, proof_size_diff))
TarekkMA marked this conversation as resolved.
Show resolved Hide resolved
}
}

#[pallet::event]
#[pallet::generate_deposit(pub(crate) fn deposit_event)]
pub enum Event<T: Config> {
Expand Down
Loading