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rtiow: default thread count to half the cores.

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This seems to be faster than using both HT buddies.
This commit is contained in:
Bill Thiede 2023-02-01 14:18:21 -08:00
parent 739b38b4ed
commit d213e04c11
1 changed files with 2 additions and 1 deletions
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rtiow/renderer/src/renderer.rs
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@ -501,7 +501,8 @@ fn render_worker(
} }
pub fn render(scene: Scene, output_dir: &Path) -> std::result::Result<(), std::io::Error> { pub fn render(scene: Scene, output_dir: &Path) -> std::result::Result<(), std::io::Error> {
let num_threads = scene.num_threads.unwrap_or_else(num_cpus::get); // Default to half the cores to disable hyperthreading.
let num_threads = scene.num_threads.unwrap_or_else(|| num_cpus::get() / 2);
let (pixel_req_tx, pixel_req_rx) = sync_channel(2 * num_threads); let (pixel_req_tx, pixel_req_rx) = sync_channel(2 * num_threads);
let (pixel_resp_tx, pixel_resp_rx) = sync_channel(2 * num_threads); let (pixel_resp_tx, pixel_resp_rx) = sync_channel(2 * num_threads);