Date: Tue, 7 May 2013 05:04:21 GMT From: Adam Nowacki <nowak@tepeserwery.pl> To: freebsd-gnats-submit@FreeBSD.org Subject: kern/178385: 'ktrace -t f' (page faults) generates gigabytes of unused data Message-ID: <201305070504.r4754Lhs062824@oldred.FreeBSD.org> Resent-Message-ID: <201305070510.r475A053043213@freefall.freebsd.org>
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>Number: 178385
>Category: kern
>Synopsis: 'ktrace -t f' (page faults) generates gigabytes of unused data
>Confidential: no
>Severity: non-critical
>Priority: low
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Tue May 07 05:10:00 UTC 2013
>Closed-Date:
>Last-Modified:
>Originator: Adam Nowacki
>Release: 9.1-STABLE
>Organization:
>Environment:
FreeBSD storage 9.1-STABLE FreeBSD 9.1-STABLE #2 r250290M: Mon May 6 16:46:02 UTC 2013 root@storage:/usr/obj/usr/src/sys/GENERIC amd64
>Description:
Tracing page faults with ktrace seems to produce disproportionate amount of data in ktrace.out.
>How-To-Repeat:
$ echo "int main() { return 0; }" | clang -x c -o test -
$ ktrace -t f ./test
-- WARNING: this will take a few minutes and generate ~76GB ktrace.out file
$ kdump
-- outputs a few lines, most of ktrace.out ignored?
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
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