I want to know the operating costs of a canister that I am developing. Initially, I tried to estimate the costs using this table but besides the obvious ones like canister creation and storage, it turned out to be very difficult since I do not know the number of Wasm instructions of each function. I…

Is ic0.performance_counter implemented already?

I don’t think so, yet I think it’s quite easy to implement it as it’s available internally…

[image] chenyan: 5: We didn’t count the cycle transfer amount here, so inter-canister call is just 1 Wasm instruction. Once the replica exposes the real instruction counter, we can track the number more precisely. Could you elaborate on this? Does the entire operation of the function invoked …

To be precise, we only count Wasm instructions on the caller side. It takes a few system API calls to make an inter-canister call. We are not tracking cycles consumed by the callee, which is paid by the caller.

We are not tracking cycles consumed by the callee, which is paid by the caller. Wait so are you saying that during intercanister calls, the caller pays for the full execution of the called method on the called canisters behalf? Or are you saying the caller pays cycles just to “hit play” and tran…

hey all, Two small updates: The documentation now has a note saying: Note: System API calls are just like normal function calls from the WebAssembly stand point. The number of instructions each call takes depends on the work done. The first iteration of the performance counter specification was…

Not yet. We will wait for the replica change to land on dfx. I also need to adjust the Candid UI code to interpret the new format.

[image] berestovskyy: The first iteration of the performance counter specification was just merged, so it should be available on the main net once the new release is rolled out (~1-2 weeks). Interesting! Is that a link to internal docs? I don’t seem to be able to access it but would love to …

Got it, thanks for letting me know.

Programmatically measure cycles consumption

Developers

gabe May 19, 2022, 10:02am 16

Hi chenyan, are you aware if it is currently possible to locally enable canister profiling in Candid UI with the new (0.10.x) dfx release?

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Programmatically measure cycles consumption

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