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71 commits

Author SHA1 Message Date
Stefan Lankes
c6339bfd2d by leaving the interrupt handler, we check if an urgent task is ready 
if yes, the kernel switchs to this task
 2011-09-06 06:46:52 -07:00
Stefan Lankes
27e652f81d if a task exists with a higher priority, we start a rescheduling in check_workqueues. 2011-09-02 13:57:11 -07:00
Stefan Lankes
e6fb99beb4 add inline assembler functions to determine the MSB and LSB 2011-09-01 13:31:41 -07:00
Stefan Lankes
426c06193b remove bug in the timer queue 2011-08-28 23:56:29 -07:00
Stefan Lankes
81d384b1b0 minor changes in the code style 2011-08-28 08:54:18 -07:00
Stefan Lankes
4fe2562839 fine tuning by using the irq fast lane 2011-08-28 01:24:28 -07:00
Stefan Lankes
771db80f26 remove merge error => scheduler has to call "finish_task_switch" 2011-08-27 06:57:21 -07:00
Stefan Lankes
7e3c06f47b if required, the waken task will remove from the timer queue 2011-08-26 21:55:16 +02:00
Stefan Lankes
1e1e77351a first approach to determine the cpu load 2011-08-24 09:32:36 +02:00
Stefan Lankes
35621d72d1 first try to realize task stealing 2011-08-18 12:16:31 +02:00
Stefan Lankes
93257508ee wakeup a blocked task on the core, which the task used during the last time slice 2011-08-17 15:09:59 +02:00
Stefan Lankes
296e8e98f4 the idle priority doesn't longer possess an own runqueue 
only the idle task uses this priority class
 2011-08-17 14:49:12 +02:00
Stefan Lankes
4c9855c83a redesign of the scheduler, defining of a runqueue per core 
=> Currently, we work stealing isn't supported
 2011-08-17 13:51:19 +02:00
Stefan Lankes
20b074d81c add additional error messages 2011-08-10 09:55:59 -07:00
Stefan Lankes
5d9f361174 add system calls to map the user-level socket library to LwIP sockets 2011-08-10 08:15:53 +02:00
Stefan Lankes
a179ded21b redesign of the timers, support of timeouts in mailboxes and semaphores 2011-08-06 15:55:34 +02:00
Stefan Lankes
452aa3b1d1 cosmetic changes and add some scheduling statistics 2011-08-03 19:37:05 +02:00
Stefan Lankes
22dab59699 minor changes in the scheduler routine to relalize a fair round-robin scheduling 2011-08-03 15:10:58 +02:00
Stefan Lankes
026d5e264c use table_lock to avoid GPs during a task switch 2011-08-02 10:24:17 +02:00
Stefan Lankes
744abc36c8 minor optimization on single core systems 2011-08-02 07:07:16 +02:00
Stefan Lankes
d5bfc4f28c avoid races on SMP systems 
=> signalizes with a new flag, that a task switch is finished
 2011-08-01 22:01:39 +02:00
Stefan Lankes
f76f4ac70d fix wrong initialization of current_task 2011-07-30 17:36:21 +02:00
Stefan Lankes
ab37b024b0 simply the scheduler => move code from entry.asm to timer.c 2011-07-21 09:59:29 +02:00
Stefan Lankes
e57a447fda minor changes in using the per_core macro, add additional output messages by an exception & cosmetic changes 2011-07-20 09:47:46 +02:00
Stefan Lankes
20c944b099 avoid a task migration during the calculation of the current task 
=> temporary clearing the IF flag
 2011-07-20 08:24:24 +02:00
Stefan Lankes
dfa928de78 reduce the number of function calls to determine the core id 2011-07-19 21:22:54 +02:00
Stefan Lankes
e595fae384 add SMP support 
- this is experimental version
- by setting MAX_CORES to 1, you are to disable the SMP support
 2011-07-18 09:14:28 +02:00
Stefan Lankes
08f5153257 add the support of inter core interrupts 2011-05-17 08:13:20 -07:00
Stefan Lankes
29ab43f289 First steps to realize Inter-Core-Communication via RCCE 2011-04-23 00:13:12 -07:00
Stefan Lankes
f3b620a9be add rudimental support of the system call times 
- no full support of the POSIX API
- however, the libc function clock works correctly
 2011-04-21 10:13:58 +02:00
Stefan Lankes
0c411fd702 add basic support of sbrk and fix bug in saving of the fpu context 2011-04-21 07:32:20 +02:00
Stefan Lankes
7cb05d8f4a first version to support the FPU 
- seems to work
- currently, we didn't support SIMD instructions
 2011-04-21 07:32:10 +02:00
Stefan Lankes
bd703f6be4 avoid compiler errors by using MAX_CORES = 1 2011-04-18 06:44:17 -07:00
Stefan Lankes
68564c3238 Merge branch 'tests' 
Conflicts:
	include/metalsvm/spinlock.h
	include/metalsvm/spinlock_types.h
	kernel/tasks.c
 2011-04-18 15:36:22 +02:00
Stefan Lankes
e94c31d03b add a new IRQ save spinlock implementation 
- avoids a deadlock
- usable in a interrupt handler
 2011-04-18 15:12:18 +02:00
Stefan Lankes
b5908af744 Merge branch 'master' of git.lfbs.rwth-aachen.de:metalsvm into doxygen 
Conflicts:
	.gitignore
	arch/x86/include/asm/apic.h
	arch/x86/include/asm/page.h
	arch/x86/include/asm/processor.h
	arch/x86/kernel/idt.c
 2011-04-14 08:40:52 +02:00
Stefan Lankes
c43efee104 use HALT instead of NOP 2011-04-08 16:02:18 +02:00
Jacek Galowicz
6c6d77cfa6 Committed the rest. There is only few stuff missing. 
Embedded nice pictures.
 2011-04-05 14:44:42 +02:00
Stefan Lankes
604670c981 now, the system call "execve" sets also the environment 2011-03-10 09:10:12 +01:00
Stefan Lankes
2d9ba6ae70 forwarding arguments to the new tasks 2011-03-08 23:12:38 +01:00
Stefan Lankes
d201c4d1bc - add the support of the system call execve 2011-03-07 20:26:55 +01:00
Stefan Lankes
6f092641ba remove memory leak and redesign of the internal memory accounting 2011-03-04 22:44:53 +01:00
Stefan Lankes
56ee331596 add nested spinlocks 
- required to avoid deadlocks
 2011-03-04 11:38:40 +01:00
Stefan Lankes
a27150b923 Fix bug in system call "fork" 
- issues: memory leak
 2011-03-02 23:08:01 +01:00
Stefan Lankes
5ce3ed9338 First steps to support the system calls "fork" and "wait" 
- Currently, the system call "fork" doesn't work and has a memory leak
- However, it is a good starting point for further developments.
 2011-03-02 13:49:36 +01:00
Stefan Lankes
17193475bb use a spinlock for each PGD 
increases also the useability of vm_alloc and vm_free
 2011-02-24 19:06:32 +01:00
Stefan Lankes
e157f93104 create also for kernel tasks a new PGD 2011-02-24 18:44:11 +01:00
Stefan Lankes
54d636d25c after process termination, the PGD and its PGTs will be freed 2011-02-24 18:32:58 +01:00
Stefan Lankes
16efb49204 remove obsolete function arguments 2011-02-24 10:15:58 +01:00
Stefan Lankes
c5b650fc32 add the support of the VMA list into the kernel 
- after process termination, this list is used to free the allocated memory regions
 2011-02-24 09:37:31 +01:00