This is generic enough that it can be applied to all ic-cdk-based canisters that use ic-metrics-encoder to expose Prometheus metrics.

Usage

Suppose you already have a main canister file that does this:

use ic_cdk::update;

To apply this throughout that canister, you would simply replace that line with this:

use ic_nervous_system_instruction_stats_update_attribute::update;

Once you do that, instruction stats will be collected for all of your canister methods. To expose that data, you simply need add this call to your encode_metrics function:

ic_instruction_stats::encode_instruction_stats(&mut metrics_encoder)?;

Future Work

In later PRs, the intention is for this to be gradually applied to all NNS and SNS canisters.

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