From: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
To: tony.luck@intel.com
Cc: peterz@infradead.org, linux-kernel@vger.kernel.org
Subject: Does Itanium permit speculative stores?
Date: Mon, 11 Nov 2013 09:13:08 -0800 [thread overview]
Message-ID: <20131111171307.GA27002@linux.vnet.ibm.com> (raw)
Hello, Tony,
Does Itanium permit speculative stores? For example, on Itanium what are
the permitted outcomes of the following litmus test, where both x and y
are initially zero?
CPU 0 CPU 1
r1 = ACCESS_ONCE(x); r2 = ACCESS_ONCE(y);
if (r1) if (r2)
ACCESS_ONCE(y) = 1; ACCESS_ONCE(x) = 1;
In particular, is the outcome (r1 == 1 && r2 == 1) possible on Itanium
given this litmus test?
Thanx, Paul
next reply other threads:[~2013-11-11 17:38 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-11-11 17:13 Paul E. McKenney [this message]
2013-11-12 18:00 ` Does Itanium permit speculative stores? Luck, Tony
2013-11-12 18:26 ` Peter Zijlstra
2013-11-12 18:46 ` Luck, Tony
2013-11-12 18:49 ` Peter Zijlstra
2013-11-12 21:29 ` Paul E. McKenney
2013-11-12 21:30 ` Paul E. McKenney
2013-11-12 18:31 ` Paul E. McKenney
2013-11-12 18:34 ` Peter Zijlstra
2013-11-27 4:55 ` Jon Masters
2013-11-27 17:19 ` Paul E. McKenney
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