From 069bf2e2ae96a03d3bdcaa1934b6fcd43d372850 Mon Sep 17 00:00:00 2001 From: "Bjoern B. Brandenburg" Date: Thu, 24 Sep 2009 15:14:22 -0400 Subject: Release 2008.3. --- doc/changes.html | 84 +++++++++++++++++++++++++++++++++++++++++++++++++ doc/changes.txt | 95 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 179 insertions(+) create mode 100644 doc/changes.html create mode 100644 doc/changes.txt (limited to 'doc') diff --git a/doc/changes.html b/doc/changes.html new file mode 100644 index 0000000..1c2a941 --- /dev/null +++ b/doc/changes.html @@ -0,0 +1,84 @@ + + + + + + + + changes.txt + + +

LITMUSRT Change Log

+ +
+This document is part of the documentation of the LITMUSRT project. +
+ +

2008.2 -> 2008.3

+ + + +

Change History

+ + + + + + diff --git a/doc/changes.txt b/doc/changes.txt new file mode 100644 index 0000000..2b40e90 --- /dev/null +++ b/doc/changes.txt @@ -0,0 +1,95 @@ +LITMUSRT Change Log +============================== + +
+This document is part of the documentation of the LITMUSRT project. +
+ +2008.2 -> 2008.3 +---------------- + +- New feature: `sys_null_call()`, a dummy system call that simplifies the process + of determining system call overheads [`litmus/litmus.c`]. + +- New feature: support for starting timers on remote CPUs via + `hrtimer_start_on()` [`kernel/hrtimer.c`]. + +- New feature: support dedicated release handling in GSN-EDF and a + corresponding `/proc` interface [`litmus/rt_domain.c`, `litmus/sched_gsn_edf.c`, + `litmus/litmus.c`]. + +- New feature: support IPI latency tracing [`litmus/trace.c`]. + +- Warn if a task's priority is compared against itself [`litmus/edf_common.c`]. + +- Remove duplicated code in heap_node allocation and allocate heap_node structs + from a dedicated slab [`litmus/litmus.c`]. + +- Avoid memory allocation/de-allocation in the release queue handling hot-path + [`litmus/rt_domain.c`] + +- Use per-event hrtimers instead of multiplexing all future releases onto a + single timer. Linux's hrtimers are cheap enough to do this, and it removes + complexity. + +- Uninline binomial heap implementation to reduce code size [`litmus/heap.c`]. + +- Assorted minor debugging improvements. + +- Minor code cleanups. + +- Bugfix: use `is_running()` in `litmus_schedule()` to test for task state change + race; otherwise plugins might get confused due to unexpected + `task_block()`/`wake_up()` calls. + +- Bugfix: avoid deadlock in `hrtimer_cancel()`; use `hrtimer_try_to_cancel()` + instead [`litmus/rt_domain.c`]. + +- Bugfix: avoid race that lead to arming the same timer twice + [`litmus/rt_domain.c`]. + +- Bugfix: avoid use-after-free race in `release_heap` [`litmus/rt_domain.c`]. + +- Bugfix: avoid rare deadlock between timer base lock and release lock + [`litmus/rt_domain.c`]. + +- Bugfix: fix compilation with `CONFIG_SCHED_TASK_TRACE` on `sparc64` + [`include/litmus/sched_trace.h`]. + +- Bugfix: fix Linux execution time accounting in Litmus scheduling class so + that `top(1)` and `ps(1)` work again [`litmus/sched_litmus.c`]. + +- Bugfix: make sure magic sysrq hotkeys do not collide [`litmus/litmus.c`]. + +- `liblitmus`: switch to `scons` build system. + +- `liblitmus`: support `x86-64`->`i386` cross compilation. + +- `liblitmus`: add `cycles` tools to simplify measuring of CPU cycles per + second. + +- `liblitmus`: support `null_call()` system call and add `null_call` tool (for + system call overhead measurements). + +- `liblitmus`: improved diagnostic output if `setsched` fails. + +- `liblitmus`: support fractional costs and periods in `rtspin`. + +- `liblitmus`: improve `release_ts` with `-w` (wait for all tasks) and `-f` + (wait for specified number of tasks) options. + +- `liblitmus`: remove outdated tests (`mode_test`, `np_test`, and `wait_test`). + +- `liblitmus`: remove `sched_trace` support. The removed code will be part of a + future standalone `sched_trace` library. + +- `ft_tools`: switch to `scons` build system. + +- `ft_tools`: support `x86-64`->`i386` cross compilation. + +- `ft_tools`: support for IPI latency measurements (`SEND_RESCHED`). + + +Change History +-------------- +- Initially created by Bjoern B. Brandenburg (bbb at cs.unc.edu) on 09/24/2009. -- cgit v1.2.2