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 for Android: free password hash cracker in your pocket
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <CABPqkBT8eQM0WVcEqE-wKO06tVtYAF02Wn_r3eKs3j9vW53m8Q@mail.gmail.com>
Date:	Mon, 30 Mar 2015 12:43:25 -0700
From:	Stephane Eranian <eranian@...gle.com>
To:	David Ahern <dsahern@...il.com>
Cc:	Peter Zijlstra <peterz@...radead.org>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Jiri Olsa <jolsa@...hat.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>,
	John Stultz <john.stultz@...aro.org>,
	"H. Peter Anvin" <hpa@...or.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Ingo Molnar <mingo@...nel.org>
Subject: Re: [PATCH] perf, record: Add clockid parameter

On Mon, Mar 30, 2015 at 12:41 PM, David Ahern <dsahern@...il.com> wrote:
> On 3/30/15 1:33 PM, Peter Zijlstra wrote:
>>
>> On Mon, Mar 30, 2015 at 11:24:12AM -0600, David Ahern wrote:
>>>
>>> This works but the result is not always intuitive as to why it failed.
>>>
>>> On a kernel that does not support the clock id you get:
>>>      $ perf sched record -k mono -- sleep 1
>>>      Error:
>>>      clockid not supported.
>>>
>>> And on a kernel that supports clockid but not for NMI:
>>>
>>>      $ perf record -k realtime -a -- sleep 1
>>>      Error:
>>>      clockid not supported.
>>>
>>>      --> H/W counters so realtime is not allowed
>>>
>>> Same message though different root causes.
>>
>>
>> Heh, ok I can fudge that :-)
>>
>
> What about having the kernel return 'not supported' error for the latter --
> H/W counters with unsafe clock?

I have reassembled all the pieces from Peter's patch. I will post it
with V6 of the JIT patches today.
--
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/

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux Powered by OpenVZ