Trying to run examples - "Error creating ring_buffer "

[sonthonaxrk]

Just trying to run the ping example.

Am I doing something wrong?

$ RUST_BACKTRACE=1 cargo run --example ping

    Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.04s
     Running `target/debug/examples/ping`
Subscribing Pong at aeron:udp?endpoint=localhost:40123 on Stream ID 1002
Publishing Ping at aeron:udp?endpoint=localhost:40123 on Stream ID 1002
Using CnC file: /var/folders/v4/j1g2wwrx7n7_x2yb646p8htw0000gr/T/aeron-rollokonig-brock/cnc.dat
thread 'main' panicked at src/aeron.rs:563:74:
Error creating ring_buffer: CapacityIsNotTwoPower { capacity: 1048960 }
stack backtrace:
   0: rust_begin_unwind
             at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/std/src/panicking.rs:665:5
   1: core::panicking::panic_fmt
             at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/core/src/panicking.rs:76:14
   2: core::result::unwrap_failed
             at /rustc/9fc6b43126469e3858e2fe86cafb4f0fd5068869/library/core/src/result.rs:1699:5
   3: core::result::Result<T,E>::expect
             at /Users/rollokonig-brock/.rustup/toolchains/stable-aarch64-apple-darwin/lib/rustlib/src/rust/library/core/src/result.rs:1061:23
   4: aeron_rs::aeron::Aeron::map_cnc_file
             at ./src/aeron.rs:563:31
   5: aeron_rs::aeron::Aeron::new
             at ./src/aeron.rs:90:23
   6: ping::main
             at ./examples/ping.rs:219:17
   7: core::ops::function::FnOnce::call_once
             at /Users/rollokonig-brock/.rustup/toolchains/stable-aarch64-apple-darwin/lib/rustlib/src/rust/library/core/src/ops/function.rs:250:5
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.

Running on:

ProductName:            macOS
ProductVersion:         15.1

Using

rustup show
Default host: aarch64-apple-darwin
rustup home:  /Users/rollokonig-brock/.rustup

installed toolchains
--------------------

stable-aarch64-apple-darwin (default)
nightly-aarch64-apple-darwin

installed targets for active toolchain
--------------------------------------

aarch64-apple-darwin
wasm32-unknown-unknown

active toolchain
----------------

stable-aarch64-apple-darwin (default)
rustc 1.84.0 (9fc6b4312 2025-01-07)

[sonthonaxrk]

Weird,

It's nearly a power of 2.

CapacityIsNotTwoPower { capacity: 1048960 }

1048960 / 2^7 == 2^13 - 1

[sonthonaxrk]

My driver context:

aeron_driver_context_t {
    ...
    to_driver_buffer_length=1049344
    to_clients_buffer_length=1048704
    counters_values_buffer_length=1048576
    error_buffer_length=1048576
    timer_interval_ns=1000000000
}

[B1GJ]

Same here.

[B1GJ]

fyi, setting pub const CACHE_LINE_LENGTH: Index = CACHE_LINE_SIZE as Index; to pub const CACHE_LINE_LENGTH: Index = 64 as Index; fixed it for me
in src/utils/misc.rs