From: Paolo Carlini <paolo.carlini@oracle.com>
To: Ulrich Drepper <drepper@gmail.com>
Cc: Ed Smith-Rowland <3dw4rd@verizon.net>,
gcc-patches <gcc-patches@gcc.gnu.org>
Subject: Re: [PATCH] libstdc++: add uniform on sphere distribution
Date: Sun, 13 Jul 2014 16:56:00 -0000 [thread overview]
Message-ID: <53C2B942.5060502@oracle.com> (raw)
In-Reply-To: <CAOPLpQcSV+U1E6f8g+MWizeB=Ec0_ZJg4gFwTSOErf76BxLeZw@mail.gmail.com>
Hi,
On 07/13/2014 06:44 PM, Ulrich Drepper wrote:
> But your 4th and 7th call example by itself is not a reason. Again,
> the input exclusively determined by the random numbers. Here, of
> course, the 4th and 7th use will produce different results. But this
> is not what the state of the distribution is supposed to capture. For
> that you'll have to save the state of the RNG as well.
Yes, you are right. Saving the full state of the distribution solves
only half of my hypothetical problem, but certainly you have to save it
if you want to, say, reset the RNGs to a common state and get the same
sequences of numbers after the os << x and is >> y pair.
Paolo.
next prev parent reply other threads:[~2014-07-13 16:56 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-13 13:55 Ed Smith-Rowland
2014-07-13 14:12 ` Ulrich Drepper
2014-07-13 14:48 ` Ed Smith-Rowland
2014-07-13 15:47 ` Paolo Carlini
2014-07-13 16:04 ` Ulrich Drepper
2014-07-13 16:12 ` Paolo Carlini
2014-07-13 16:18 ` Ulrich Drepper
2014-07-13 16:29 ` Paolo Carlini
2014-07-13 16:45 ` Ulrich Drepper
2014-07-13 16:56 ` Paolo Carlini [this message]
2014-07-14 7:58 ` Andreas Schwab
2014-07-14 8:18 ` Paolo Carlini
2014-07-16 11:30 ` Ed Smith-Rowland
2014-07-16 15:03 ` Paolo Carlini
2014-07-16 17:38 ` Ulrich Drepper
-- strict thread matches above, loose matches on Subject: below --
2014-07-14 10:31 Dominique Dhumieres
2014-07-13 2:01 Ulrich Drepper
2014-07-13 2:06 ` Ulrich Drepper
2014-07-13 9:28 ` Paolo Carlini
2014-07-13 10:04 ` Ulrich Drepper
2014-07-13 10:40 ` Paolo Carlini
2014-07-23 10:05 ` Marc Glisse
2014-07-23 10:44 ` Jonathan Wakely
2014-07-24 22:14 ` Ulrich Drepper
2014-07-24 23:19 ` Jonathan Wakely
2014-08-08 23:24 ` Ulrich Drepper
2014-08-09 7:15 ` Marc Glisse
2014-08-09 11:55 ` Ulrich Drepper
2014-08-09 12:34 ` Marc Glisse
2014-08-09 15:24 ` Ulrich Drepper
2014-08-09 15:33 ` Marc Glisse
2014-08-09 16:55 ` Ed Smith-Rowland
2014-08-09 16:56 ` Ulrich Drepper
2014-08-09 17:40 ` Marc Glisse
2014-08-09 18:00 ` Ulrich Drepper
2014-08-13 7:36 ` Bin.Cheng
2014-08-13 7:43 ` Bin.Cheng
2014-08-13 8:41 ` Paolo Carlini
2014-08-13 11:25 ` Paolo Carlini
2014-08-13 11:32 ` Marc Glisse
2014-08-13 11:40 ` Paolo Carlini
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