65 messages in org.freebsd.freebsd-smpRe: SMP meeting summary| From | Sent On | Attachments |
|---|---|---|
| Jason Evans | Jun 24, 2000 11:56 pm | |
| Daniel Eischen | Jun 25, 2000 6:58 am | |
| Terry Lambert | Jun 25, 2000 10:12 am | |
| Terry Lambert | Jun 25, 2000 10:36 am | |
| Julian Elischer | Jun 25, 2000 10:41 am | |
| Poul-Henning Kamp | Jun 25, 2000 11:07 am | |
| Nate Williams | Jun 25, 2000 9:41 pm | |
| Frank Mayhar | Jun 25, 2000 11:27 pm | |
| Frank Mayhar | Jun 25, 2000 11:31 pm | |
| Luoqi Chen | Jun 26, 2000 9:46 am | |
| Arun Sharma | Jun 26, 2000 9:47 am | |
| Jason Evans | Jun 26, 2000 11:06 am | |
| Matthew Dillon | Jun 26, 2000 12:26 pm | |
| Matthew Dillon | Jun 26, 2000 12:48 pm | |
| John Sconiers | Jun 26, 2000 12:56 pm | |
| Matthew Dillon | Jun 26, 2000 1:07 pm | |
| Luoqi Chen | Jun 26, 2000 1:13 pm | |
| Doug Rabson | Jun 26, 2000 1:26 pm | |
| Jason Evans | Jun 26, 2000 2:56 pm | |
| Jason Evans | Jun 26, 2000 3:14 pm | |
| Daniel Eischen | Jun 26, 2000 4:59 pm | |
| Luoqi Chen | Jun 26, 2000 7:14 pm | |
| Jason Evans | Jun 26, 2000 7:55 pm | |
| Joe Eykholt | Jun 26, 2000 8:09 pm | |
| Greg Lehey | Jun 27, 2000 8:00 pm | |
| Jason Evans | Jun 27, 2000 8:25 pm | |
| Daniel Eischen | Jun 27, 2000 8:26 pm | |
| Greg Lehey | Jun 27, 2000 9:59 pm | |
| Greg Lehey | Jun 27, 2000 10:11 pm | |
| Terry Lambert | Jun 28, 2000 4:15 pm | |
| Terry Lambert | Jun 28, 2000 4:18 pm | |
| Terry Lambert | Jun 28, 2000 4:37 pm | |
| Terry Lambert | Jun 28, 2000 4:51 pm | |
| Arun Sharma | Jun 28, 2000 9:43 pm | |
| Greg Lehey | Jul 2, 2000 7:15 pm | |
| Daniel Eischen | Jul 3, 2000 3:23 am | |
| Greg Lehey | Jul 3, 2000 3:30 am | |
| Jeroen C. van Gelderen | Jul 3, 2000 7:55 am | |
| Chuck Paterson | Jul 3, 2000 8:28 am | |
| Chuck Paterson | Jul 3, 2000 8:47 am | |
| Frank Mayhar | Jul 3, 2000 8:49 am | |
| Greg Lehey | Jul 3, 2000 4:08 pm | |
| David Scheidt | Jul 3, 2000 4:35 pm | |
| Joe Eykholt | Jul 3, 2000 4:47 pm | |
| Greg Lehey | Jul 3, 2000 4:52 pm | |
| Joe Eykholt | Jul 3, 2000 4:58 pm | |
| Greg Lehey | Jul 3, 2000 5:26 pm | |
| Joe Eykholt | Jul 3, 2000 5:41 pm | |
| Chuck Paterson | Jul 3, 2000 7:17 pm | |
| Daniel Eischen | Jul 3, 2000 7:25 pm | |
| Daniel Eischen | Jul 3, 2000 7:35 pm | |
| Greg Lehey | Jul 3, 2000 7:39 pm | |
| Daniel Eischen | Jul 3, 2000 7:41 pm | |
| Chuck Paterson | Jul 3, 2000 8:40 pm | |
| Alfred Perlstein | Jul 3, 2000 10:08 pm | |
| Greg Lehey | Jul 3, 2000 10:37 pm | |
| Peter Wemm | Jul 4, 2000 2:43 pm | |
| Greg Lehey | Jul 4, 2000 3:58 pm | |
| Peter Wemm | Jul 4, 2000 4:06 pm | |
| Terry Lambert | Jul 5, 2000 3:38 pm | |
| Terry Lambert | Jul 5, 2000 4:00 pm | |
| Terry Lambert | Jul 5, 2000 4:06 pm | |
| Terry Lambert | Jul 5, 2000 4:10 pm | |
| Alfred Perlstein | Jul 5, 2000 4:29 pm | |
| Terry Lambert | Jul 6, 2000 4:50 pm |
| Subject: | Re: SMP meeting summary | |
|---|---|---|
| From: | Luoqi Chen (luo...@watermarkgroup.com) | |
| Date: | Jun 26, 2000 7:14:37 pm | |
| List: | org.freebsd.freebsd-smp | |
In regards to turnstiles, each kernel thread is born with its own turnstile. When it blocks on a mutex that doesn't have any waiters (no turnstile allocated to it), it uses the threads turnstile. If the mutex already has a turnstile (there are other waiters), then the threads turnstile is added to the system (per-CPU?) pool of turnstiles. When the thread wakes up and acquires the mutex, it takes a turnstile back from the turnstile pool. Turnstiles are also used for read/write locks.
-- Dan Eischen
Does anyone know why a turnstile structure is used, instead of a sleep queue embedded in the mutex structure? With cache line size of 16/32 bytes, the latter seems to be more advantageous.
-lq
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