20,11 → 20,11 |
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/** |
------------ |
CVS : $Id: rr2.c,v 1.3 2002-11-11 08:32:06 pj Exp $ |
CVS : $Id: rr2.c,v 1.4 2003-01-07 17:07:50 pj Exp $ |
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File: $File$ |
Revision: $Revision: 1.3 $ |
Last update: $Date: 2002-11-11 08:32:06 $ |
Revision: $Revision: 1.4 $ |
Last update: $Date: 2003-01-07 17:07:50 $ |
------------ |
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This file contains the scheduling module RR2 (Round Robin) version 2 |
60,6 → 60,7 |
#include <kernel/descr.h> |
#include <kernel/var.h> |
#include <kernel/func.h> |
#include <kernel/trace.h> |
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/*+ Status used in the level +*/ |
#define RR2_READY MODULE_STATUS_BASE |
79,57 → 80,11 |
} RR2_level_des; |
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static char *RR2_status_to_a(WORD status) |
{ |
if (status < MODULE_STATUS_BASE) |
return status_to_a(status); |
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switch (status) { |
case RR2_READY: return "RR2_Ready"; |
default : return "RR2_Unknown"; |
} |
} |
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static int RR2_level_accept_task_model(LEVEL l, TASK_MODEL *m) |
{ |
if (m->pclass == NRT_PCLASS || m->pclass == (NRT_PCLASS | l)) |
return 0; |
else |
return -1; |
} |
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static int RR2_level_accept_guest_model(LEVEL l, TASK_MODEL *m) |
{ |
return -1; |
} |
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static void RR2_level_status(LEVEL l) |
{ |
RR2_level_des *lev = (RR2_level_des *)(level_table[l]); |
PID p = iq_query_first(&lev->ready); |
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kern_printf("Slice: %d \n", lev->slice); |
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while (p != NIL) { |
kern_printf("Pid: %d\t Name: %20s Status: %s\n",p,proc_table[p].name, |
RR2_status_to_a(proc_table[p].status)); |
p = iq_query_next(p, &lev->ready); |
} |
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for (p=0; p<MAX_PROC; p++) |
if (proc_table[p].task_level == l && proc_table[p].status != RR2_READY |
&& proc_table[p].status != FREE ) |
kern_printf("Pid: %d\t Name: %20s Status: %s\n",p,proc_table[p].name, |
RR2_status_to_a(proc_table[p].status)); |
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} |
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/* This is not efficient but very fair :-) |
The need of all this stuff is because if a task execute a long time |
due to (shadow!) priority inheritance, then the task shall go to the |
tail of the queue many times... */ |
static PID RR2_level_scheduler(LEVEL l) |
static PID RR2_public_scheduler(LEVEL l) |
{ |
RR2_level_des *lev = (RR2_level_des *)(level_table[l]); |
|
150,20 → 105,15 |
} |
} |
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static int RR2_level_guarantee(LEVEL l, bandwidth_t *freebandwidth) |
static int RR2_public_create(LEVEL l, PID p, TASK_MODEL *m) |
{ |
/* the RR2 level always guarantee... the function is defined because |
there can be an aperiodic server at a level with less priority than |
the RR2 that need guarantee (e.g., a TBS server) */ |
return 1; |
} |
RR2_level_des *lev = (RR2_level_des *)(level_table[l]); |
NRT_TASK_MODEL *nrt; |
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if (m->pclass != NRT_PCLASS) return -1; |
if (m->level != 0 && m->level != l) return -1; |
nrt = (NRT_TASK_MODEL *)m; |
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static int RR2_task_create(LEVEL l, PID p, TASK_MODEL *m) |
{ |
RR2_level_des *lev = (RR2_level_des *)(level_table[l]); |
NRT_TASK_MODEL *nrt = (NRT_TASK_MODEL *)m; |
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/* the task state is set at SLEEP by the general task_create |
the only thing to set remains the capacity stuffs that are set |
to the values passed in the model... */ |
189,20 → 139,8 |
return 0; /* OK */ |
} |
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static void RR2_task_detach(LEVEL l, PID p) |
static void RR2_public_dispatch(LEVEL l, PID p, int nostop) |
{ |
/* the RR2 level doesn't introduce any new field in the TASK_MODEL |
so, all detach stuffs are done by the task_create |
The task state is set at FREE by the general task_create */ |
} |
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static int RR2_task_eligible(LEVEL l, PID p) |
{ |
return 0; /* if the task p is chosen, it is always eligible */ |
} |
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static void RR2_task_dispatch(LEVEL l, PID p, int nostop) |
{ |
RR2_level_des *lev = (RR2_level_des *)(level_table[l]); |
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/* the task state is set EXE by the scheduler() |
211,7 → 149,7 |
iq_extract(p, &lev->ready); |
} |
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static void RR2_task_epilogue(LEVEL l, PID p) |
static void RR2_public_epilogue(LEVEL l, PID p) |
{ |
RR2_level_des *lev = (RR2_level_des *)(level_table[l]); |
|
228,7 → 166,7 |
proc_table[p].status = RR2_READY; |
} |
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static void RR2_task_activate(LEVEL l, PID p) |
static void RR2_public_activate(LEVEL l, PID p) |
{ |
RR2_level_des *lev = (RR2_level_des *)(level_table[l]); |
|
240,19 → 178,17 |
return; |
} |
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ll_gettime(TIME_EXACT, &proc_table[p].request_time); |
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/* Insert task in the coRR2ect position */ |
proc_table[p].status = RR2_READY; |
iq_insertlast(p,&lev->ready); |
} |
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static void RR2_task_insert(LEVEL l, PID p) |
static void RR2_public_unblock(LEVEL l, PID p) |
{ |
RR2_level_des *lev = (RR2_level_des *)(level_table[l]); |
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/* Similar to RR2_task_activate, but we don't check in what state |
the task is and we don't set the request_time */ |
/* Similar to RR2_task_activate, |
but we don't check in what state the task is */ |
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/* Insert task in the coRR2ect position */ |
proc_table[p].status = RR2_READY; |
259,7 → 195,7 |
iq_insertlast(p,&lev->ready); |
} |
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static void RR2_task_extract(LEVEL l, PID p) |
static void RR2_public_block(LEVEL l, PID p) |
{ |
/* Extract the running task from the level |
. we have already extract it from the ready queue at the dispatch time. |
271,13 → 207,12 |
*/ |
} |
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static void RR2_task_endcycle(LEVEL l, PID p) |
static int RR2_public_message(LEVEL l, PID p, void *m) |
{ |
RR2_level_des *lev = (RR2_level_des *)(level_table[l]); |
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if (lev->nact[p] > 0) { |
/* continue!!!! */ |
ll_gettime(TIME_EXACT, &proc_table[p].request_time); |
lev->nact[p]--; |
iq_insertfirst(p,&lev->ready); |
proc_table[p].status = RR2_READY; |
284,9 → 219,14 |
} |
else |
proc_table[p].status = SLEEP; |
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jet_update_endcycle(); /* Update the Jet data... */ |
trc_logevent(TRC_ENDCYCLE,&exec_shadow); /* tracer stuff */ |
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return 0; |
} |
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static void RR2_task_end(LEVEL l, PID p) |
static void RR2_public_end(LEVEL l, PID p) |
{ |
RR2_level_des *lev = (RR2_level_des *)(level_table[l]); |
|
297,46 → 237,6 |
iq_insertlast(p,&freedesc); |
} |
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static void RR2_task_sleep(LEVEL l, PID p) |
{ |
RR2_level_des *lev = (RR2_level_des *)(level_table[l]); |
if (lev->nact[p] >= 0) lev->nact[p] = 0; |
proc_table[p].status = SLEEP; |
} |
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static int RR2_guest_create(LEVEL l, PID p, TASK_MODEL *m) |
{ kern_raise(XINVALID_GUEST,exec_shadow); return 0; } |
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static void RR2_guest_detach(LEVEL l, PID p) |
{ kern_raise(XINVALID_GUEST,exec_shadow); } |
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static void RR2_guest_dispatch(LEVEL l, PID p, int nostop) |
{ kern_raise(XINVALID_GUEST,exec_shadow); } |
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static void RR2_guest_epilogue(LEVEL l, PID p) |
{ kern_raise(XINVALID_GUEST,exec_shadow); } |
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static void RR2_guest_activate(LEVEL l, PID p) |
{ kern_raise(XINVALID_GUEST,exec_shadow); } |
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static void RR2_guest_insert(LEVEL l, PID p) |
{ kern_raise(XINVALID_GUEST,exec_shadow); } |
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static void RR2_guest_extract(LEVEL l, PID p) |
{ kern_raise(XINVALID_GUEST,exec_shadow); } |
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static void RR2_guest_endcycle(LEVEL l, PID p) |
{ kern_raise(XINVALID_GUEST,exec_shadow); } |
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static void RR2_guest_end(LEVEL l, PID p) |
{ kern_raise(XINVALID_GUEST,exec_shadow); } |
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static void RR2_guest_sleep(LEVEL l, PID p) |
{ kern_raise(XINVALID_GUEST,exec_shadow); } |
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/* Registration functions */ |
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/*+ This init function install the "main" task +*/ |
364,7 → 264,7 |
if (p == NIL) |
printk("\nPanic!!! can't create main task...\n"); |
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RR2_task_activate(lev,p); |
RR2_public_activate(lev,p); |
} |
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372,11 → 272,11 |
TIME slice the slice for the Round Robin queue |
int createmain 1 if the level creates the main task 0 otherwise |
struct multiboot_info *mb used if createmain specified +*/ |
void RR2_register_level(TIME slice, |
LEVEL RR2_register_level(TIME slice, |
int createmain, |
struct multiboot_info *mb) |
{ |
LEVEL l; /* the level that we register */ |
LEVEL l; /* the level that we register */ |
RR2_level_des *lev; /* for readableness only */ |
PID i; |
|
383,50 → 283,23 |
printk("RR2_register_level\n"); |
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/* request an entry in the level_table */ |
l = level_alloc_descriptor(); |
l = level_alloc_descriptor(sizeof(RR2_level_des)); |
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/* alloc the space needed for the RR2_level_des */ |
lev = (RR2_level_des *)kern_alloc(sizeof(RR2_level_des)); |
lev = (RR2_level_des *)level_table[l]; |
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printk(" lev=%d\n",(int)lev); |
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/* update the level_table with the new entry */ |
level_table[l] = (level_des *)lev; |
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/* fill the standard descriptor */ |
strncpy(lev->l.level_name, RR2_LEVELNAME, MAX_LEVELNAME); |
lev->l.level_code = RR2_LEVEL_CODE; |
lev->l.level_version = RR2_LEVEL_VERSION; |
lev->l.public_scheduler = RR2_public_scheduler; |
lev->l.public_create = RR2_public_create; |
lev->l.public_end = RR2_public_end; |
lev->l.public_dispatch = RR2_public_dispatch; |
lev->l.public_epilogue = RR2_public_epilogue; |
lev->l.public_activate = RR2_public_activate; |
lev->l.public_unblock = RR2_public_unblock; |
lev->l.public_block = RR2_public_block; |
lev->l.public_message = RR2_public_message; |
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lev->l.level_accept_task_model = RR2_level_accept_task_model; |
lev->l.level_accept_guest_model = RR2_level_accept_guest_model; |
lev->l.level_status = RR2_level_status; |
lev->l.level_scheduler = RR2_level_scheduler; |
lev->l.level_guarantee = RR2_level_guarantee; |
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lev->l.task_create = RR2_task_create; |
lev->l.task_detach = RR2_task_detach; |
lev->l.task_eligible = RR2_task_eligible; |
lev->l.task_dispatch = RR2_task_dispatch; |
lev->l.task_epilogue = RR2_task_epilogue; |
lev->l.task_activate = RR2_task_activate; |
lev->l.task_insert = RR2_task_insert; |
lev->l.task_extract = RR2_task_extract; |
lev->l.task_endcycle = RR2_task_endcycle; |
lev->l.task_end = RR2_task_end; |
lev->l.task_sleep = RR2_task_sleep; |
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lev->l.guest_create = RR2_guest_create; |
lev->l.guest_detach = RR2_guest_detach; |
lev->l.guest_dispatch = RR2_guest_dispatch; |
lev->l.guest_epilogue = RR2_guest_epilogue; |
lev->l.guest_activate = RR2_guest_activate; |
lev->l.guest_insert = RR2_guest_insert; |
lev->l.guest_extract = RR2_guest_extract; |
lev->l.guest_endcycle = RR2_guest_endcycle; |
lev->l.guest_end = RR2_guest_end; |
lev->l.guest_sleep = RR2_guest_sleep; |
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/* fill the RR2 descriptor part */ |
for (i = 0; i < MAX_PROC; i++) |
lev->nact[i] = -1; |
441,6 → 314,8 |
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if (createmain) |
sys_atrunlevel(RR2_call_main,(void *) l, RUNLEVEL_INIT); |
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return l; |
} |
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