From: "hunt at redhat dot com" <sourceware-bugzilla@sourceware.org>
To: systemtap@sources.redhat.com
Subject: [Bug translator/2293] confirm preemption/interrupt blocking in systemtap probes
Date: Mon, 27 Feb 2006 17:32:00 -0000 [thread overview]
Message-ID: <20060227173251.10706.qmail@sourceware.org> (raw)
In-Reply-To: <20060207171449.2293.fche@redhat.com>
------- Additional Comments From hunt at redhat dot com 2006-02-27 17:32 -------
(In reply to comment #3)
> Other runtime protective measure still exist though: get_cpu/put_cpu can simply
> be smp_processor_id.
Yeah, I forgot about those.
I've been trying to solve a problem created by this change. The problem is with
scripts that collect a large amount of data then dump it all at probe end. You
have now disabled interrupts, so the data fills the buffers but stpd cannot
empty them. So we have effectively limited systemtap output to whatever space is
remaining in buffer when "probe end" is hit. Which might not be much.
That's fine for little test scripts, but a real solution is needed. Ideas?
--
http://sourceware.org/bugzilla/show_bug.cgi?id=2293
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next prev parent reply other threads:[~2006-02-27 17:32 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-02-07 17:14 [Bug translator/2293] New: " fche at redhat dot com
2006-02-22 15:06 ` [Bug translator/2293] " fche at redhat dot com
2006-02-22 20:07 ` hunt at redhat dot com
2006-02-23 20:42 ` fche at redhat dot com
2006-02-27 17:32 ` hunt at redhat dot com [this message]
2006-02-27 18:56 ` disabled interrupts (Was bug #2293 Frank Ch. Eigler
2006-02-27 19:16 ` Martin Hunt
2006-02-27 20:01 ` Frank Ch. Eigler
2006-02-27 21:10 ` Martin Hunt
2006-03-29 7:06 ` [Bug translator/2293] confirm preemption/interrupt blocking in systemtap probes hunt at redhat dot com
2006-03-29 11:55 ` fche at redhat dot com
2006-03-29 18:05 ` Martin Hunt
2006-03-29 20:18 ` Frank Ch. Eigler
2006-05-05 16:09 ` Vara Prasad
2006-03-29 18:05 ` hunt at redhat dot com
2006-05-01 14:20 ` fche at redhat dot com
2006-05-05 16:10 ` prasadav at us dot ibm dot com
[not found] ` <20060505160951.1801.qmail@sourceware.org>
2006-05-05 16:38 ` Frank Ch. Eigler
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