451a6890d6
- Currently the cpu time quantum is timer-ticks based. Thus the remaining quantum is decreased only if the processes is interrupted by a timer tick. As processes block a lot this typically does not happen for normal user processes. Also the quantum depends on the frequency of the timer. - This change makes the quantum miliseconds based. Internally the miliseconds are translated into cpu cycles. Everytime userspace execution is interrupted by kernel the cycles just consumed by the current process are deducted from the remaining quantum. - It makes the quantum system timer frequency independent. - The boot processes quantum is loosely derived from the tick-based quantas and 60Hz timer and subject to future change - the 64bit arithmetics is a little ugly, will be changes once we have compiler support for 64bit integers (soon)
39 lines
1.2 KiB
C
39 lines
1.2 KiB
C
#ifndef TYPE_H
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#define TYPE_H
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#include <minix/com.h>
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#include <machine/interrupt.h>
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/* Process table and system property related types. */
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typedef int proc_nr_t; /* process table entry number */
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typedef short sys_id_t; /* system process index */
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typedef struct { /* bitmap for system indexes */
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bitchunk_t chunk[BITMAP_CHUNKS(NR_SYS_PROCS)];
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} sys_map_t;
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struct boot_image {
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proc_nr_t proc_nr; /* process number to use */
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int flags; /* process flags */
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unsigned quantum; /* time quantum in ms */
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int priority; /* scheduling priority */
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int stksize; /* stack size for tasks */
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char proc_name[P_NAME_LEN]; /* name in process table */
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endpoint_t endpoint; /* endpoint number when started */
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};
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typedef unsigned long irq_policy_t;
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typedef unsigned long irq_id_t;
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typedef struct irq_hook {
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struct irq_hook *next; /* next hook in chain */
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int (*handler)(struct irq_hook *); /* interrupt handler */
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int irq; /* IRQ vector number */
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int id; /* id of this hook */
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endpoint_t proc_nr_e; /* (endpoint) NONE if not in use */
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irq_id_t notify_id; /* id to return on interrupt */
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irq_policy_t policy; /* bit mask for policy */
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} irq_hook_t;
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typedef int (*irq_handler_t)(struct irq_hook *);
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#endif /* TYPE_H */
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