From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 334A9386F02B; Tue, 12 May 2020 15:41:52 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 334A9386F02B From: "fche at redhat dot com" To: elfutils-devel@sourceware.org Subject: [Bug debuginfod/25978] New: improve debuginfod prefetching / fdcache-management logic Date: Tue, 12 May 2020 15:41:51 +0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: elfutils X-Bugzilla-Component: debuginfod X-Bugzilla-Version: unspecified X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: fche at redhat dot com X-Bugzilla-Status: NEW X-Bugzilla-Resolution: X-Bugzilla-Priority: P2 X-Bugzilla-Assigned-To: unassigned at sourceware dot org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_id short_desc product version bug_status bug_severity priority component assigned_to reporter cc target_milestone Message-ID: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://sourceware.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: elfutils-devel@sourceware.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Elfutils-devel mailing list List-Unsubscribe: , List-Archive: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 12 May 2020 15:41:52 -0000 https://sourceware.org/bugzilla/show_bug.cgi?id=3D25978 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, a= nd freshly prefetched archive elements are put at the back of lru[], each evic= tion 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. --=20 You are receiving this mail because: You are on the CC list for the bug.=