From: Bakul Shah <bakul@bitblocks.com>
To: Fans of the OS Plan 9 from Bell Labs <9fans@9fans.net>
Subject: Re: [9fans] syscall 53
Date: Mon, 19 May 2014 12:50:16 -0700 [thread overview]
Message-ID: <20140519195016.B21E6B827@mail.bitblocks.com> (raw)
In-Reply-To: Your message of "Mon, 19 May 2014 13:25:42 EDT." <36c5eca0f06e9acbe2fac19067f457d8@ladd.quanstro.net>
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On Mon, 19 May 2014 13:25:42 EDT erik quanstrom <quanstro@quanstro.net> wrote:
>
> i would be very surprised if there were any gain in accuracy. the
> accuracy is going to be dominated by the most inaccurate term, and
> that's likely going to be timesync, and on the order of milliseconds.
Speaking of time and accuracy....
I am adding some logic to synchronize with the PPS signal from
the GPS device that I hooked up to a RaspberryPi. With this
change the TOD clock should be accurate to within 10 to 20 µs.
So I for one welcome the new syscall! [Though its introduction
could've been better managed]
But using a TOD clock for measuring performance seems wrong
since it will also have to account for leapseconds (at the
moment timesync happily ignores leapseconds).
next prev parent reply other threads:[~2014-05-19 19:50 UTC|newest]
Thread overview: 117+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-17 19:11 goo
2014-05-17 21:17 ` Jeff Sickel
2014-05-17 22:21 ` Jeff Sickel
2014-05-17 22:45 ` Skip Tavakkolian
2014-05-18 4:34 ` lucio
2014-05-18 8:29 ` David du Colombier
2014-05-18 15:28 ` Jeff Sickel
2014-05-18 15:32 ` Skip Tavakkolian
2014-05-18 15:34 ` Skip Tavakkolian
2014-05-18 15:38 ` Jeff Sickel
2014-05-18 16:03 ` Skip Tavakkolian
2014-05-18 22:55 ` Skip Tavakkolian
2014-05-19 1:54 ` erik quanstrom
2014-05-19 2:27 ` Jeff Sickel
2014-05-19 4:18 ` lucio
2014-05-19 12:50 ` erik quanstrom
2014-05-19 14:01 ` lucio
2014-05-19 16:24 ` erik quanstrom
2014-05-19 16:54 ` erik quanstrom
2014-05-19 17:16 ` lucio
2014-05-19 17:22 ` erik quanstrom
2014-05-19 17:13 ` lucio
2014-05-19 17:25 ` erik quanstrom
2014-05-19 19:50 ` Bakul Shah [this message]
2014-05-19 19:59 ` erik quanstrom
2014-05-19 20:54 ` ron minnich
2014-05-19 21:30 ` Charles Forsyth
2014-05-19 21:41 ` ron minnich
2014-05-19 23:02 ` Kurt H Maier
2014-05-19 23:06 ` andrey mirtchovski
2014-05-19 23:12 ` Kurt H Maier
2014-05-19 23:17 ` andrey mirtchovski
2014-05-20 0:09 ` Jeff Sickel
2014-05-19 21:34 ` Anthony Sorace
2014-05-20 14:04 ` erik quanstrom
2014-05-20 16:41 ` ron minnich
2014-05-20 17:14 ` erik quanstrom
2014-05-20 18:32 ` Kurt H Maier
2014-05-20 19:49 ` ron minnich
2014-05-20 19:54 ` erik quanstrom
2014-05-20 20:06 ` Kurt H Maier
2014-05-21 10:23 ` hiro
2014-05-20 20:33 ` Jeff Sickel
2014-05-21 1:37 ` Skip Tavakkolian
2014-05-21 15:40 ` lucio
2014-05-21 16:25 ` erik quanstrom
2014-05-21 16:56 ` Skip Tavakkolian
2014-05-21 20:05 ` Steffen Nurpmeso
2014-05-22 0:13 ` Bakul Shah
2014-05-22 3:25 ` [9fans] CMS/MMS (VCS/SCM/DSCM) [was: syscall 53] Jeff Sickel
2014-05-22 5:03 ` lucio
2014-05-22 5:07 ` lucio
2014-05-22 13:29 ` erik quanstrom
2014-05-22 13:50 ` lucio
2014-05-22 5:11 ` Bakul Shah
2014-05-22 5:26 ` lucio
2014-05-22 12:57 ` erik quanstrom
2014-05-22 13:43 ` lucio
2014-05-22 13:57 ` erik quanstrom
2014-05-22 5:28 ` lucio
2014-05-22 5:36 ` lucio
2014-05-22 6:00 ` Bakul Shah
2014-05-22 6:18 ` lucio
2014-05-22 12:45 ` erik quanstrom
2014-05-22 20:05 ` Bakul Shah
2014-05-22 20:11 ` erik quanstrom
2014-05-23 20:07 ` Steve Simon
2014-05-22 9:52 ` Aram Hăvărneanu
2014-05-22 10:29 ` lucio
2014-05-22 10:46 ` Aram Hăvărneanu
2014-05-22 13:03 ` erik quanstrom
2014-05-22 5:23 ` Skip Tavakkolian
2014-05-22 5:47 ` lucio
2014-05-22 12:49 ` erik quanstrom
2014-05-22 7:49 ` Alex Jordan
2014-05-22 12:49 ` Riddler
2014-05-22 3:43 ` [9fans] syscall 53 Kurt H Maier
2014-05-22 5:12 ` lucio
2014-05-22 16:15 ` Kurt H Maier
2014-05-22 5:36 ` Bakul Shah
2014-05-22 10:50 ` Aram Hăvărneanu
2014-05-21 17:01 ` lucio
2014-05-21 17:41 ` erik quanstrom
2014-05-21 19:08 ` lucio
2014-05-21 20:36 ` erik quanstrom
2014-05-22 4:46 ` lucio
2014-05-22 13:18 ` erik quanstrom
2014-05-22 13:39 ` lucio
2014-05-22 14:22 ` Riddler
2014-05-22 4:54 ` lucio
2014-05-22 13:07 ` erik quanstrom
2014-05-21 1:21 ` Skip Tavakkolian
2014-05-21 15:36 ` lucio
2014-05-21 15:57 ` erik quanstrom
2014-05-21 17:03 ` lucio
2014-05-21 16:50 ` Kurt H Maier
2014-05-21 18:02 ` hiro
2014-05-20 17:05 ` Bakul Shah
2014-05-20 17:28 ` erik quanstrom
2014-05-19 17:26 ` Charles Forsyth
2014-05-19 17:29 ` erik quanstrom
2014-05-19 19:15 ` Aram Hăvărneanu
2014-05-19 19:44 ` Charles Forsyth
2014-05-19 20:51 ` erik quanstrom
2014-05-20 3:52 ` cinap_lenrek
2014-05-19 4:15 ` lucio
2014-05-18 0:34 ` erik quanstrom
-- strict thread matches above, loose matches on Subject: below --
2014-05-21 18:26 sl
2014-05-21 18:31 ` erik quanstrom
2014-05-18 7:35 goo
2014-05-17 16:54 goo
2014-05-17 13:53 goo
2014-05-17 14:56 ` erik quanstrom
2014-05-17 10:23 goo
2014-05-17 12:11 ` erik quanstrom
2014-05-17 12:23 ` David du Colombier
2014-05-17 12:12 ` erik quanstrom
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