From: Roland McGrath <roland@redhat.com>
To: george@mvista.com
Cc: tglx@linutronix.de, Ingo Molnar <mingo@elte.hu>,
Oleg Nesterov <oleg@tv-sign.ru>,
linux-kernel@vger.kernel.org,
Steven Rostedt <rostedt@goodmis.org>,
"Paul E. McKenney" <paulmck@us.ibm.com>,
"'high-res-timers-discourse@lists.sourceforge.net'"
<high-res-timers-discourse@lists.sourceforge.net>
Subject: Re: [PATCH 2.6.13-rc6-rt9] PI aware dynamic priority adjustment
Date: Mon, 26 Sep 2005 14:03:34 -0700 (PDT) [thread overview]
Message-ID: <20050926210334.65BC7180E1F@magilla.sf.frob.com> (raw)
In-Reply-To: George Anzinger's message of Friday, 19 August 2005 18:36:30 -0700 <4306891E.9060409@mvista.com>
> On another issue along this line, I have been thinking of changing the
> x86 TSC arch cycle size to 1ns. (NOT the resolution, the units for the
> arch cycle.) The reason to do this is to correctly track changes in cpu
> frequency as it is today, we would need to track down and update all
> pending HR timers when ever the frequency changed. By using a common
> unit all we need to do is change the conversion constants (well I guess
> they would not be constants any more :). I REALLY don't want to do this
> as it does add conversion overhead, but I can not think of another clean
> way to track TSC frequency changes.
sched_clock does this conversion at sampling time, too.
next prev parent reply other threads:[~2005-09-26 21:03 UTC|newest]
Thread overview: 63+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-08-18 6:01 2.6.13-rc6-rt9 Ingo Molnar
2005-08-18 15:24 ` 2.6.13-rc6-rt9 Thomas Gleixner
2005-08-18 16:08 ` 2.6.13-rc6-rt9 Thomas Gleixner
2005-08-18 21:17 ` 2.6.13-rc6-rt9 Thomas Gleixner
2005-08-18 22:54 ` [2.6.13-rc6-rt9 patch] fix DECNET_ROUTER=y compile Adrian Bunk
2005-08-22 7:59 ` Ingo Molnar
2005-08-18 22:54 ` 2.6.13-rc6-rt9: compile errors Adrian Bunk
2005-08-22 8:44 ` Ingo Molnar
2005-08-19 0:05 ` 2.6.13-rc6-rt9 Chuck Harding
2005-08-19 6:39 ` 2.6.13-rc6-rt9 Steven Rostedt
2005-08-19 13:00 ` 2.6.13-rc6-rt9 Steven Rostedt
2005-08-19 15:36 ` 2.6.13-rc6-rt9 Steven Rostedt
2005-08-22 7:57 ` 2.6.13-rc6-rt9 Ingo Molnar
2005-08-22 7:58 ` 2.6.13-rc6-rt9 Ingo Molnar
2005-08-23 12:36 ` 2.6.13-rc6-rt9 Ingo Molnar
2005-08-23 12:50 ` 2.6.13-rc6-rt9 Steven Rostedt
2005-08-23 12:56 ` 2.6.13-rc6-rt9 Ingo Molnar
2005-08-19 16:56 ` 2.6.13-rc6-rt9 Peter Zijlstra
2005-08-19 18:30 ` 2.6.13-rc6-rt9 Peter Zijlstra
2005-08-19 18:43 ` 2.6.13-rc6-rt9 Paul E. McKenney
2005-08-20 19:27 ` 2.6.13-rc6-rt9 Peter Zijlstra
2005-08-20 21:24 ` 2.6.13-rc6-rt9 Jeff Dike
2005-09-29 7:54 ` 2.6.13-rc6-rt9 Peter Zijlstra
2005-09-30 1:00 ` 2.6.13-rc6-rt9 Paul E. McKenney
2005-09-30 1:07 ` 2.6.13-rc6-rt9 Thomas Gleixner
2005-09-30 1:46 ` 2.6.13-rc6-rt9 Paul E. McKenney
2005-09-30 6:17 ` 2.6.13-rc6-rt9 Thomas Gleixner
2005-08-19 21:50 ` 2.6.13-rc6-rt9 Darren Hart
2005-08-25 6:24 ` 2.6.13-rc6-rt9 Ingo Molnar
2005-08-19 22:13 ` 2.6.13-rc6-rt9 Darren Hart
2005-08-19 23:00 ` 2.6.13-rc6-rt9 Thomas Gleixner
2005-08-20 15:13 ` 2.6.13-rc6-rt9 Darren Hart
2005-08-19 23:48 ` [PATCH 2.6.13-rc6-rt9] PI aware dynamic priority adjustment Thomas Gleixner
2005-08-20 0:19 ` George Anzinger
2005-08-20 0:36 ` Thomas Gleixner
2005-08-20 1:36 ` George Anzinger
2005-09-26 21:03 ` Roland McGrath [this message]
2005-08-20 14:10 ` Oleg Nesterov
2005-08-20 16:04 ` Thomas Gleixner
2005-08-20 17:50 ` Oleg Nesterov
2005-08-22 21:37 ` George Anzinger
2005-08-20 16:58 ` [PATCH] fix send_sigqueue() vs thread exit race Oleg Nesterov
2005-08-21 9:44 ` Thomas Gleixner
2005-08-21 10:41 ` Oleg Nesterov
2005-08-21 12:38 ` Thomas Gleixner
2005-08-21 10:59 ` Oleg Nesterov
2005-08-21 21:24 ` Thomas Gleixner
2005-08-21 21:50 ` Thomas Gleixner
2005-08-22 6:39 ` Oleg Nesterov
2005-08-22 8:08 ` Thomas Gleixner
2005-08-22 8:52 ` Oleg Nesterov
2005-08-22 10:06 ` Thomas Gleixner
2005-08-22 16:45 ` Oleg Nesterov
2005-08-23 10:13 ` Thomas Gleixner
2005-08-23 16:17 ` Oleg Nesterov
2005-08-23 18:29 ` Thomas Gleixner
2005-09-24 13:42 ` [PATCH] fix exit_itimers() vs posix_timer_event() AB-BA deadlock Oleg Nesterov
2005-09-25 5:44 ` Andrew Morton
2005-09-25 14:07 ` [PATCH] fix exit_itimers() vs posix_timer_event() AB-BAdeadlock Oleg Nesterov
2005-10-23 16:50 ` Oleg Nesterov
2005-08-23 10:42 ` [PATCH] fix send_sigqueue() vs thread exit race Thomas Gleixner
2005-08-22 7:38 ` [PATCH 2.6.13-rc6-rt9] PI aware dynamic priority adjustment Ingo Molnar
2005-08-22 7:41 ` Ingo Molnar
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