e720764a9b
When sigma0 runs on a lower priority than the rest of the threads in the system it might come to the point that while answering a page fault or I/O memory area request the timeslice of the caller (core-pager) gets fully consumed. As long as other threads are still executable and don't block sigma0 won't do progress anymore, because it runs at the lowest priority. This commit simply sets sigma0's priority to the highest in the system. Was: 'sigma0_prio.patch'
85 lines
2.1 KiB
C++
85 lines
2.1 KiB
C++
/*
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* (c) 2008-2009 Adam Lackorzynski <adam@os.inf.tu-dresden.de>,
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* Alexander Warg <warg@os.inf.tu-dresden.de>
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* economic rights: Technische Universität Dresden (Germany)
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*
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* This file is part of TUD:OS and distributed under the terms of the
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* GNU General Public License 2.
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* Please see the COPYING-GPL-2 file for details.
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*/
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/* startup stuff */
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/* it should be possible to throw away the text/data/bss of the object
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file resulting from this source -- so, we don't define here
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anything we could still use at a later time. instead, globals are
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defined in globals.c */
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#include <l4/sys/ipc.h>
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#include <l4/cxx/iostream>
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#include "globals.h"
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#include "mem_man.h"
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#include "page_alloc.h"
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#include "memmap.h"
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#include "init.h"
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#include "init_mem.h"
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#include "ioports.h"
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#include "mem_man_test.h"
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#include <l4/sys/debugger.h>
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#include <l4/sys/scheduler.h>
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/* started as the L4 sigma0 task from crt0.S */
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extern "C" void _init(void);
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typedef void Ctor();
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extern Ctor *__preinit_array_start[];
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extern Ctor *__preinit_array_end [];
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extern Ctor *__init_array_start [];
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extern Ctor *__init_array_end [];
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static void call_init_array(Ctor **start, Ctor **end)
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{
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for (; start < end; ++start)
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if (*start)
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(*start)();
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}
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void
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init(l4_kernel_info_t *info)
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{
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call_init_array(__preinit_array_start, __preinit_array_end);
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_init();
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call_init_array(__init_array_start, __init_array_end);
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l4_info = info;
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L4::cout << PROG_NAME": Hello!\n";
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L4::cout << " KIP @ " << info << '\n';
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l4_debugger_set_object_name(L4_BASE_TASK_CAP, "sigma0");
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l4_debugger_set_object_name(L4_BASE_FACTORY_CAP, "root factory");
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l4_debugger_set_object_name(L4_BASE_THREAD_CAP, "sigma0");
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l4_sched_param_t params = l4_sched_param(255);
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l4_scheduler_run_thread(L4_BASE_SCHEDULER_CAP, L4_BASE_THREAD_CAP, ¶ms);
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Page_alloc_base::init();
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init_memory(info);
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init_io_ports(info);
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//mem_man_test();
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L4::cout << " allocated " << Page_alloc_base::total()/1024
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<< "KB for maintenance structures\n";
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if (debug_memory_maps)
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dump_all();
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/* now start the memory manager */
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pager();
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}
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