litmus-rt.git, branch wip-fmlp-dequeue The LITMUS^RT kernel. Improve FMLP queue management. 2011-03-31T14:47:01+00:00 Glenn Elliott gelliott@cs.unc.edu 2011-03-31T14:47:01+00:00 0f6a8e02773f8c23b5b6a3dbfa044e50c9d7d811 The next owner of a FMLP-protected resource is dequeued from the FMLP FIFO queue by unlock() (when the resource is freed by the previous owner) instead of performing the dequeue by the next owner immediately after it has been woken up. This simplifies the code a little bit and also reduces potential spinlock contention. 
The next owner of a FMLP-protected resource is dequeued from
the FMLP FIFO queue by unlock() (when the resource is freed by
the previous owner) instead of performing the dequeue by the next
owner immediately after it has been woken up.

This simplifies the code a little bit and also reduces potential
spinlock contention.
Pfair: remove sporadic_release flag 2011-02-01T22:00:28+00:00 Bjoern B. Brandenburg bbb@cs.unc.edu 2011-01-28T01:11:59+00:00 c05eaa8091d2cadc20363d44a85ee454262f4bc2 Instead of having an extra flag, Pfair should just infer sporadic release based on deadlines like other plugins, too. 
Instead of having an extra flag, Pfair should just infer sporadic
release based on deadlines like other plugins, too.
Pfair: support clustered scheduling 2011-02-01T22:00:27+00:00 Bjoern B. Brandenburg bbb@cs.unc.edu 2011-01-07T22:37:01+00:00 71efbc5459ef95ed902a6980eae646197529364e Just like C-EDF is a global scheduler that is split across several clusters, Pfair can be applied on a per-cluster basis. This patch changes the Pfair implementation to enable clustering based on the recently added generic clustering support. 
Just like C-EDF is a global scheduler that is split across several
clusters, Pfair can be applied on a per-cluster basis. This patch
changes the Pfair implementation to enable clustering based on the
recently added generic clustering support.
Litmus core: add generic clustering support 2011-02-01T22:00:27+00:00 Bjoern B. Brandenburg bbb@cs.unc.edu 2011-01-27T21:23:46+00:00 343d4ead3b12992f494134114cf50e4f37c656c5 Inspired by the existing C-EDF code, this generic version will build clusters of CPUs based on a given cache level. 
Inspired by the existing C-EDF code, this generic version will build
clusters of CPUs based on a given cache level.
Litmus core: extract userspace interface from C-EDF 2011-02-01T22:00:26+00:00 Bjoern B. Brandenburg bbb@cs.unc.edu 2011-01-27T01:42:49+00:00 4ce37704ec0bedb28b5708d32964fca471e793d0 Make the cluster size configuration in C-EDF generic so that it can be used by other clustered schedulers. 
Make the cluster size configuration in C-EDF generic so that it can be
used by other clustered schedulers.
Feather-Trace: rename locking trace points 2011-02-01T21:54:35+00:00 Bjoern B. Brandenburg bbb@cs.unc.edu 2011-01-29T19:45:49+00:00 963fd846e36b48d5338ef2a134d3ee8d208abc07 Since we don't expect to trace more than one lock type at a time, having protocol-specific trace points is not required. 
Since we don't expect to trace more than one lock type at a time,
having protocol-specific trace points is not required.
fdso: pass userpsace config argument to object constructor 2011-02-01T21:53:21+00:00 Bjoern B. Brandenburg bbb@cs.unc.edu 2011-01-29T20:50:52+00:00 7f0bd4c213ff8dca0eb3bdd887f5c62c8d30fab5 As Glenn pointed out, it is useful for some protocols (e.g., k-exclusion protocols) to know the userspace configuration at object creation time. This patch changes the fdso API to pass the parameter to the object constructor, which is then in turn passed to the lock allocater. The return code from the lock allocater is passed to userspace in return. This also fixes some null pointer dereferences in the FDSO code found by the test suite in liblitmus. 
As Glenn pointed out, it is useful for some protocols (e.g.,
k-exclusion protocols) to know the userspace configuration at object
creation time. This patch changes the fdso API to pass the parameter
to the object constructor, which is then in turn passed to the lock
allocater. The return code from the lock allocater is passed to
userspace in return.

This also fixes some null pointer dereferences in the FDSO code found
by the test suite in liblitmus.
GSN-EDF: re-implement FMLP support 2011-02-01T21:30:43+00:00 Bjoern B. Brandenburg bbb@cs.unc.edu 2011-01-29T18:38:24+00:00 fab768a4cdc49ad7886cac0d0361f8432965a817 This introduces the global FMLP based on the generic locking layer. 
This introduces the global FMLP based on the generic locking layer.
PSN-EDF: re-implement FMLP support 2011-02-01T21:30:42+00:00 Bjoern B. Brandenburg bbb@cs.unc.edu 2011-01-29T00:06:11+00:00 e705aa52df711112d434ccc87ee5fb5838c205a2 Implement the partitioned FMLP with priority boosting based on the generic lock API. 
Implement the partitioned FMLP with priority boosting based on the
generic lock API.
EDF: support priority boosting 2011-02-01T21:30:41+00:00 Bjoern B. Brandenburg bbb@cs.unc.edu 2011-01-29T00:04:08+00:00 e593c9dbe858c82e284ff85e625837ae3ab32f1c While we are at it, simplify edf_higher_prio() a bit. 
While we are at it, simplify edf_higher_prio() a bit.