* [Bug debuginfod/25978] New: improve debuginfod prefetching / fdcache-management logic
@ 2020-05-12 15:41 fche at redhat dot com
2021-06-08 12:21 ` [Bug debuginfod/25978] " nsanci at redhat dot com
2021-07-14 17:41 ` mark at klomp dot org
0 siblings, 2 replies; 3+ messages in thread
From: fche at redhat dot com @ 2020-05-12 15:41 UTC (permalink / raw)
To: elfutils-devel
https://sourceware.org/bugzilla/show_bug.cgi?id=25978
Bug ID: 25978
Summary: improve debuginfod prefetching / fdcache-management
logic
Product: elfutils
Version: unspecified
Status: NEW
Severity: normal
Priority: P2
Component: debuginfod
Assignee: unassigned at sourceware dot org
Reporter: fche at redhat dot com
CC: elfutils-devel at sourceware dot org
Target Milestone: ---
The debuginfod fdcache-prefetch logic has been observed to show some
degeneraacies in operation. Since fdcache evictions are done frequently, and
freshly prefetched archive elements are put at the back of lru[], each eviction
round can summarily nuke things that were just prefetched .... and are just
going to be prefetched again. It would be better to have two lru lists, or
being able to insert newly prefetched entries somewhere in the middle of the
list rather than at the very very end.
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^ permalink raw reply [flat|nested] 3+ messages in thread* [Bug debuginfod/25978] improve debuginfod prefetching / fdcache-management logic 2020-05-12 15:41 [Bug debuginfod/25978] New: improve debuginfod prefetching / fdcache-management logic fche at redhat dot com @ 2021-06-08 12:21 ` nsanci at redhat dot com 2021-07-14 17:41 ` mark at klomp dot org 1 sibling, 0 replies; 3+ messages in thread From: nsanci at redhat dot com @ 2021-06-08 12:21 UTC (permalink / raw) To: elfutils-devel https://sourceware.org/bugzilla/show_bug.cgi?id=25978 Noah Sanci <nsanci at redhat dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- Assignee|unassigned at sourceware dot org |nsanci at redhat dot com CC| |nsanci at redhat dot com -- You are receiving this mail because: You are on the CC list for the bug. ^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug debuginfod/25978] improve debuginfod prefetching / fdcache-management logic 2020-05-12 15:41 [Bug debuginfod/25978] New: improve debuginfod prefetching / fdcache-management logic fche at redhat dot com 2021-06-08 12:21 ` [Bug debuginfod/25978] " nsanci at redhat dot com @ 2021-07-14 17:41 ` mark at klomp dot org 1 sibling, 0 replies; 3+ messages in thread From: mark at klomp dot org @ 2021-07-14 17:41 UTC (permalink / raw) To: elfutils-devel https://sourceware.org/bugzilla/show_bug.cgi?id=25978 Mark Wielaard <mark at klomp dot org> changed: What |Removed |Added ---------------------------------------------------------------------------- Resolution|--- |FIXED Status|NEW |RESOLVED CC| |mark at klomp dot org --- Comment #1 from Mark Wielaard <mark at klomp dot org> --- commit fddaa57358c53ab86856d9ed0089d1b4ec1b7a1e Author: Noah <nsanci@redhat.com> Date: Thu Jun 10 10:29:45 2021 -0400 debuginfod: PR25978 - Created the prefetch fdcache The debuginfod fdcache-prefetch logic has been observed to show some degeneracies in operation. Since fdcache evictions are done frequently, and freshly prefetched archive elements are put at the back of lru[], each eviction round can summarily nuke things that were just prefetched .... and are just going to be prefetched again. It would be better to have two lru lists, or being able to insert newly prefetched entries somewhere in the middle of the list rather than at the very very end. https://sourceware.org/bugzilla/show_bug.cgi?id=25978 Signed-off-by: Noah Sanci <nsanci@redhat.com> -- You are receiving this mail because: You are on the CC list for the bug. ^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2021-07-14 17:41 UTC | newest] Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2020-05-12 15:41 [Bug debuginfod/25978] New: improve debuginfod prefetching / fdcache-management logic fche at redhat dot com 2021-06-08 12:21 ` [Bug debuginfod/25978] " nsanci at redhat dot com 2021-07-14 17:41 ` mark at klomp dot org
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