From: Andi Kleen <andi@firstfloor.org>
To: Robert Richter <robert.richter@amd.com>
Cc: Ingo Molnar <mingo@elte.hu>, LKML <linux-kernel@vger.kernel.org>,
oprofile-list <oprofile-list@lists.sourceforge.net>
Subject: Re: [PATCH 0/26] oprofile: Performance counter multiplexing
Date: Tue, 28 Jul 2009 20:45:06 +0200 [thread overview]
Message-ID: <87ljm8hcjx.fsf@basil.nowhere.org> (raw)
In-Reply-To: <1248800846-25422-1-git-send-email-robert.richter@amd.com> (Robert Richter's message of "Tue, 28 Jul 2009 19:07:00 +0200")
Robert Richter <robert.richter@amd.com> writes:
> If unsure, say N.
>
> +config OPROFILE_EVENT_MULTIPLEX
> + bool "OProfile multiplexing support (EXPERIMENTAL)"
> + default n
> + depends on OPROFILE && X86
> + help
> + The number of hardware counters is limited. The multiplexing
> + feature enables OProfile to gather more events than counters
> + are provided by the hardware. This is realized by switching
> + between events at an user specified time interval.
> +
I would suggest to drop that CONFIG and have the code unconditional.
It's not a lot code and should be always available.
Will do more detailed review later and will look at Intel P6 support.
Where's the userland support for this?
-Andi
--
ak@linux.intel.com -- Speaking for myself only.
next prev parent reply other threads:[~2009-07-28 18:45 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-07-28 17:07 [PATCH 0/26] oprofile: Performance counter multiplexing Robert Richter
2009-07-28 17:07 ` [PATCH 01/26] x86/oprofile: Rework and simplify nmi_cpu_setup() Robert Richter
2009-07-28 17:07 ` [PATCH 02/26] x86/oprofile: Whitespaces changes only Robert Richter
2009-07-28 17:07 ` [PATCH 03/26] oprofile: Implement performance counter multiplexing Robert Richter
2009-07-28 17:07 ` [PATCH 04/26] x86/oprofile: Fix usage of NUM_CONTROLS/NUM_COUNTERS macros Robert Richter
2009-07-28 17:07 ` [PATCH 05/26] x86/oprofile: Use per_cpu() instead of __get_cpu_var() Robert Richter
2009-07-28 17:07 ` [PATCH 06/26] x86/oprofile: Fix initialization of switch_index Robert Richter
2009-07-28 17:07 ` [PATCH 07/26] oprofile: oprofile_set_timeout(), return with error for invalid args Robert Richter
2009-07-28 17:07 ` [PATCH 08/26] oprofile: Rename variable timeout_jiffies and move to oprofile_files.c Robert Richter
2009-07-28 17:07 ` [PATCH 09/26] oprofile: Remove oprofile_multiplexing_init() Robert Richter
2009-07-28 17:07 ` [PATCH 10/26] oprofile: Grouping multiplexing code in oprof.c Robert Richter
2009-07-28 17:07 ` [PATCH 11/26] oprofile: Introduce op_x86_phys_to_virt() Robert Richter
2009-07-28 17:07 ` [PATCH 12/26] oprofile: Grouping multiplexing code in op_model_amd.c Robert Richter
2009-07-28 17:07 ` [PATCH 13/26] x86/oprofile: Implement multiplexing setup/shutdown functions Robert Richter
2009-07-28 17:07 ` [PATCH 14/26] x86/oprofile: Moving nmi_setup_cpu_mux() in nmi_int.c Robert Richter
2009-07-28 17:07 ` [PATCH 15/26] x86/oprofile: Moving nmi_cpu_save/restore_mpx_registers() " Robert Richter
2009-07-28 17:07 ` [PATCH 16/26] x86/oprofile: Moving nmi_cpu_switch() " Robert Richter
2009-07-28 17:07 ` [PATCH 17/26] x86/oprofile: Remove const qualifier from struct op_x86_model_spec Robert Richter
2009-07-28 17:07 ` [PATCH 18/26] x86/oprofile: Remove unused num_virt_controls " Robert Richter
2009-07-28 17:07 ` [PATCH 19/26] x86/oprofile: Modify initialization of num_virt_counters Robert Richter
2009-07-28 17:07 ` [PATCH 20/26] x86/oprofile: Add function has_mux() to check multiplexing support Robert Richter
2009-07-28 17:07 ` [PATCH 21/26] x86/oprofile: Enable multiplexing only if the model supports it Robert Richter
2009-07-28 17:07 ` [PATCH 22/26] x86/oprofile: Implement mux_clone() Robert Richter
2009-07-28 17:07 ` [PATCH 23/26] oprofile: Adding switch counter to oprofile statistic variables Robert Richter
2009-07-28 17:07 ` [PATCH 24/26] x86/oprofile: Implement op_x86_virt_to_phys() Robert Richter
2009-07-28 17:07 ` [PATCH 25/26] x86/oprofile: Add counter reservation check for virtual counters Robert Richter
2009-07-28 17:07 ` [PATCH 26/26] x86/oprofile: Small coding style fixes Robert Richter
2009-07-28 18:45 ` Andi Kleen [this message]
2009-07-28 22:18 ` [PATCH 0/26] oprofile: Performance counter multiplexing Suthikulpanit, Suravee
2009-08-03 11:22 ` Ingo Molnar
2009-08-03 14:25 ` Arjan van de Ven
2009-08-04 20:11 ` Ingo Molnar
2009-08-05 12:35 ` Robert Richter
2009-08-06 7:31 ` Pekka Enberg
2009-08-06 10:51 ` Ingo Molnar
2009-08-13 16:13 ` Robert Richter
[not found] ` <20090806105134.GD11236__37984.4768475325$1249556453$gmane$org@elte.hu>
2010-02-26 14:51 ` Andi Kleen
2010-03-05 16:46 ` Robert Richter
2010-03-05 17:01 ` Steven Rostedt
2010-03-08 3:51 ` Andi Kleen
2009-08-03 16:30 ` Robert Richter
2009-08-04 17:05 ` Ingo Molnar
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=87ljm8hcjx.fsf@basil.nowhere.org \
--to=andi@firstfloor.org \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@elte.hu \
--cc=oprofile-list@lists.sourceforge.net \
--cc=robert.richter@amd.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox