linux-kernel - Re: [PATCH 3/6] perf record: add time-of-day option

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <1298995250.5226.882.camel@laptop>
Date:	Tue, 01 Mar 2011 17:00:50 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	David Ahern <daahern@...co.com>
Cc:	linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org,
	acme@...stprotocols.net, mingo@...e.hu, fweisbec@...il.com,
	paulus@...ba.org, tglx@...utronix.de
Subject: Re: [PATCH 3/6] perf record: add time-of-day option

On Tue, 2011-03-01 at 08:41 -0700, David Ahern wrote:

> realtime-clock counter is created with a period N. How do you correlate
> perf_clock to time-of-day until now + N? 

You scan fwd? Since its at most N time ahead you're scanning fwd its
still constant time.

Thing is, I'm really not convinced this is a very useful ioctl() in
generic, and ioctl()s really need a good justification to add.

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/