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Measure LocalLayoutContexts in LayoutTask and LayoutWorkers.

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The FreeType instances in layout workers are reasonably large and worth
measuring. The one in LayoutTask is smaller but it's easy to measure at the
same time. Sample output:
```
|    8.33 MiB -- pages
|       8.33 MiB -- url(file:///home/njn/moz/servo/../servo-static-suite/wikipedia/Guardians%20of%20the%20Galaxy%20(film)%20-%20Wikipedia,%20the%20free%20encyclopedia.html)
|          1.32 MiB -- layout-worker-0-local-context
|          1.31 MiB -- layout-worker-1-local-context
|          1.24 MiB -- layout-worker-3-local-context
|          1.17 MiB -- layout-worker-4-local-context
|          1.08 MiB -- layout-worker-2-local-context
|          1.06 MiB -- layout-worker-5-local-context
|          0.78 MiB -- paint-task
|             0.78 MiB -- buffer-map
|          0.38 MiB -- layout-task
|             0.30 MiB -- display-list
|             0.07 MiB -- local-context
```
This required adding a mechanism to WorkQueue to measure worker TLSes.
This commit is contained in:
Nicholas Nethercote 2015-06-10 17:31:28 -07:00
parent fdeebf86a1
commit 48a0725c01
5 changed files with 70 additions and 3 deletions
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22
components/layout/layout_task.rs
View file

@ -9,7 +9,7 @@
use animation;
use construct::ConstructionResult;
use context::{SharedLayoutContext, SharedLayoutContextWrapper};
use context::{SharedLayoutContext, SharedLayoutContextWrapper, heap_size_of_local_context};
use css::node_style::StyledNode;
use data::{LayoutDataAccess, LayoutDataWrapper};
use display_list_builder::ToGfxColor;
@ -575,10 +575,28 @@ impl LayoutTask {
let rw_data = self.lock_rw_data(possibly_locked_rw_data);
let stacking_context = rw_data.stacking_context.as_ref();
reports.push(Report {
path: path!["pages", format!("url({})", self.url), "display-list"],
path: path!["pages", format!("url({})", self.url), "layout-task", "display-list"],
size: stacking_context.map_or(0, |sc| sc.heap_size_of_children()),
});
// The LayoutTask has a context in TLS...
reports.push(Report {
path: path!["pages", format!("url({})", self.url), "layout-task", "local-context"],
size: heap_size_of_local_context(),
});
// ... as do each of the LayoutWorkers, if present.
if let Some(ref traversal) = rw_data.parallel_traversal {
let sizes = traversal.heap_size_of_tls(heap_size_of_local_context);
for (i, size) in sizes.iter().enumerate() {
reports.push(Report {
path: path!["pages", format!("url({})", self.url),
format!("layout-worker-{}-local-context", i)],
size: *size
});
}
}
reports_chan.send(reports);
}