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View Code? Open in Web Editor NEWA Rust port of the ProgressLogger class from the DSI Utilities
License: Apache License 2.0
A Rust port of the ProgressLogger class from the DSI Utilities
License: Apache License 2.0
ProgressLogger prints the current resident memory (as "used").
However, because of how often we use it while working with large memory-mapped files, this is not very useful, as it includes the shared memory (ie. the parts of the mmaped files that are cached in memory).
Hi,
A pattern I find myself reusing when working with Rayon is the following:
let mut pl = ProgressLogger::default().display_memory();
pl.item_name = "arc";
pl.local_speed = true;
pl.expected_updates = Some(estimate_updates(&dataset_dir));
pl.start("Sorting arcs");
let pl = Mutex::new(pl);
let counters = thread_local::ThreadLocal::new();
let sorted_arc_lists: Vec<SortPairs<()>> = iter_arcs(&dataset_dir)
.inspect(|_| {
// This is safe because only this thread accesses this and only from
// here.
let counter = counters.get_or(|| UnsafeCell::new(0));
let counter: &mut usize = unsafe { &mut *counter.get() };
*counter += 1;
if *counter % 32768 == 0 {
// Update but avoid lock contention at the expense
// of precision (counts at most 32768 too many at the
// beginning of each iterator)
pl.lock().unwrap().update_with_count(32768);
*counter = 0
}
})
.map(|arc| {
// ...
})
.collect();
Is this something you think is worth documenting in this crate?
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