source: trunk/kernel/kern/cluster.c @ 574

Last change on this file since 574 was 564, checked in by alain, 6 years ago

Complete restructuration of kernel locks.
File size: 22.4 KB
Line 
1/*
2 * cluster.c - Cluster-Manager related operations
3 *
4 * Author  Ghassan Almaless (2008,2009,2010,2011,2012)
5 *         Mohamed Lamine Karaoui (2015)
6 *         Alain Greiner (2016,2017,2018)
7 *
8 * Copyright (c) UPMC Sorbonne Universites
9 *
10 * This file is part of ALMOS-MKH..
11 *
12 * ALMOS-MKH. is free software; you can redistribute it and/or modify it
13 * under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; version 2.0 of the License.
15 *
16 * ALMOS-MKH. is distributed in the hope that it will be useful, but
17 * WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
19 * General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with ALMOS-MKH.; if not, write to the Free Software Foundation,
23 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
24 */
25
26#include <kernel_config.h>
27#include <hal_kernel_types.h>
28#include <hal_atomic.h>
29#include <hal_special.h>
30#include <hal_ppm.h>
31#include <hal_macros.h>
32#include <remote_fifo.h>
33#include <printk.h>
34#include <errno.h>
35#include <queuelock.h>
36#include <core.h>
37#include <chdev.h>
38#include <scheduler.h>
39#include <list.h>
40#include <cluster.h>
41#include <boot_info.h>
42#include <bits.h>
43#include <ppm.h>
44#include <thread.h>
45#include <kmem.h>
46#include <process.h>
47#include <dqdt.h>
48
49/////////////////////////////////////////////////////////////////////////////////////
50// Extern global variables
51/////////////////////////////////////////////////////////////////////////////////////
52
53extern process_t           process_zero;     // allocated in kernel_init.c
54extern chdev_directory_t   chdev_dir;        // allocated in kernel_init.c
55
56
57
58///////////////////////////////////////////////////
59void cluster_info_init( struct boot_info_s * info )
60{
61    boot_device_t * dev;      // pointer on external peripheral
62    uint32_t        func;     // external peripheral functionnal type
63    uint32_t        x;
64    uint32_t        y;
65    uint32_t        i;   
66
67        cluster_t * cluster = LOCAL_CLUSTER;
68
69    // initialize cluster global parameters
70        cluster->paddr_width     = info->paddr_width;
71        cluster->x_width         = info->x_width;
72        cluster->y_width         = info->y_width;
73        cluster->x_size          = info->x_size;
74        cluster->y_size          = info->y_size;
75        cluster->io_cxy          = info->io_cxy;
76
77    // initialize the cluster_info[][] array
78    for (x = 0; x < CONFIG_MAX_CLUSTERS_X; x++) 
79    {
80        for (y = 0; y < CONFIG_MAX_CLUSTERS_Y;y++) 
81        {
82            cluster->cluster_info[x][y] = info->cluster_info[x][y];
83        }
84    }
85
86    // initialize external peripherals channels
87    for( i = 0 ; i < info->ext_dev_nr ; i++ )
88    {
89        dev  = &info->ext_dev[i];
90        func = FUNC_FROM_TYPE( dev->type );   
91        if( func == DEV_FUNC_TXT ) cluster->nb_txt_channels = dev->channels;
92        if( func == DEV_FUNC_NIC ) cluster->nb_nic_channels = dev->channels;
93        if( func == DEV_FUNC_IOC ) cluster->nb_ioc_channels = dev->channels;
94        if( func == DEV_FUNC_FBF ) cluster->nb_fbf_channels = dev->channels;
95    }
96
97    // initialize number of cores
98        cluster->cores_nr  = info->cores_nr;
99
100}  // end cluster_info_init()
101
102/////////////////////////////////////////////////////////
103error_t cluster_manager_init( struct boot_info_s * info )
104{
105    error_t         error;
106    lpid_t          lpid;     // local process_index
107    lid_t           lid;      // local core index
108
109        cluster_t * cluster = LOCAL_CLUSTER;
110
111    // initialize the lock protecting the embedded kcm allocator
112        busylock_init( &cluster->kcm_lock , LOCK_CLUSTER_KCM );
113
114#if DEBUG_CLUSTER_INIT
115uint32_t cycle = (uint32_t)hal_get_cycles();
116if( DEBUG_CLUSTER_INIT < cycle )
117printk("\n[DBG] %s : thread %x in process %x enters for cluster %x / cycle %d\n",
118__FUNCTION__, CURRENT_THREAD->trdid, CURRENT_THREAD->process->pid, local_cxy , cycle );
119#endif
120
121    // initialises DQDT
122    cluster->dqdt_root_level = dqdt_init( info->x_size,
123                                          info->y_size ) - 1;
124
125#if( DEBUG_CLUSTER_INIT & 1 )
126cycle = (uint32_t)hal_get_cycles();
127if( DEBUG_CLUSTER_INIT < cycle )
128printk("\n[DBG] %s : DQDT initialized in cluster %x / cycle %d\n",
129__FUNCTION__ , local_cxy , cycle );
130#endif
131
132    // initialises embedded PPM
133        error = hal_ppm_init( info );
134
135    if( error )
136    {
137        printk("\n[ERROR] in %s : cannot initialize PPM in cluster %x\n",
138               __FUNCTION__ , local_cxy );
139        return ENOMEM;
140    }
141
142#if( DEBUG_CLUSTER_INIT & 1 )
143cycle = (uint32_t)hal_get_cycles();
144if( DEBUG_CLUSTER_INIT < cycle )
145printk("\n[DBG] %s : PPM initialized in cluster %x / cycle %d\n",
146__FUNCTION__ , local_cxy , cycle );
147#endif
148
149    // initialises embedded KHM
150        khm_init( &cluster->khm );
151
152#if( DEBUG_CLUSTER_INIT & 1 )
153cycle = (uint32_t)hal_get_cycles();
154if( DEBUG_CLUSTER_INIT < cycle )
155printk("\n[DBG] %s : KHM initialized in cluster %x at cycle %d\n",
156__FUNCTION__ , local_cxy , hal_get_cycles() );
157#endif
158
159    // initialises embedded KCM
160        kcm_init( &cluster->kcm , KMEM_KCM );
161
162#if( DEBUG_CLUSTER_INIT & 1 )
163cycle = (uint32_t)hal_get_cycles();
164if( DEBUG_CLUSTER_INIT < cycle )
165printk("\n[DBG] %s : KCM initialized in cluster %x at cycle %d\n",
166__FUNCTION__ , local_cxy , hal_get_cycles() );
167#endif
168
169    // initialises all cores descriptors
170        for( lid = 0 ; lid < cluster->cores_nr; lid++ )
171        {
172                core_init( &cluster->core_tbl[lid],    // target core descriptor
173                       lid,                        // local core index
174                       info->core[lid].gid );      // gid from boot_info_t
175        }
176
177#if( DEBUG_CLUSTER_INIT & 1 )
178cycle = (uint32_t)hal_get_cycles();
179if( DEBUG_CLUSTER_INIT < cycle )
180printk("\n[DBG] %s : cores initialized in cluster %x / cycle %d\n",
181__FUNCTION__ , local_cxy , cycle );
182#endif
183
184    // initialises RPC FIFOs
185        for( lid = 0 ; lid < cluster->cores_nr; lid++ )
186    {
187            remote_fifo_init( &cluster->rpc_fifo[lid] );
188        cluster->rpc_threads[lid] = 0;
189    }
190
191#if( DEBUG_CLUSTER_INIT & 1 )
192cycle = (uint32_t)hal_get_cycles();
193if( DEBUG_CLUSTER_INIT < cycle )
194printk("\n[DBG] %s : RPC fifo inialized in cluster %x at cycle %d\n",
195__FUNCTION__ , local_cxy , hal_get_cycles() );
196#endif
197
198    // initialise pref_tbl[] in process manager
199        queuelock_init( &cluster->pmgr.pref_lock , LOCK_CLUSTER_PREFTBL );
200    cluster->pmgr.pref_nr = 0;
201    cluster->pmgr.pref_tbl[0] = XPTR( local_cxy , &process_zero );
202    for( lpid = 1 ; lpid < CONFIG_MAX_PROCESS_PER_CLUSTER ; lpid++ )
203    {
204        cluster->pmgr.pref_tbl[lpid] = XPTR_NULL;
205    }
206
207    // initialise local_list in process manager
208    xlist_root_init( XPTR( local_cxy , &cluster->pmgr.local_root ) );
209    cluster->pmgr.local_nr = 0;
210        remote_queuelock_init( XPTR( local_cxy , &cluster->pmgr.local_lock ) ,
211                           LOCK_CLUSTER_LOCALS );
212
213    // initialise copies_lists in process manager
214    for( lpid = 0 ; lpid < CONFIG_MAX_PROCESS_PER_CLUSTER ; lpid++ )
215    {
216        cluster->pmgr.copies_nr[lpid] = 0;
217        xlist_root_init( XPTR( local_cxy , &cluster->pmgr.copies_root[lpid] ) );
218            remote_queuelock_init( XPTR( local_cxy , &cluster->pmgr.copies_lock[lpid] ),
219                               LOCK_CLUSTER_COPIES );
220    }
221
222#if DEBUG_CLUSTER_INIT
223cycle = (uint32_t)hal_get_cycles();
224if( DEBUG_CLUSTER_INIT < cycle )
225printk("\n[DBG] %s : thread %x in process %x exit for cluster %x / cycle %d\n",
226__FUNCTION__, CURRENT_THREAD->trdid, CURRENT_THREAD->process->pid , local_cxy , cycle );
227#endif
228
229    hal_fence();
230
231        return 0;
232} // end cluster_manager_init()
233
234///////////////////////////////////
235cxy_t cluster_random_select( void )
236{
237    uint32_t  index;
238    uint32_t  x;   
239    uint32_t  y;
240    cxy_t     cxy;
241
242    uint32_t  x_size    = LOCAL_CLUSTER->x_size;
243    uint32_t  y_size    = LOCAL_CLUSTER->y_size;
244
245    do 
246    {
247        index     = ( hal_get_cycles() + hal_get_gid() ) % (x_size * y_size);
248        x         = index / y_size;
249        y         = index % y_size;
250        cxy       = HAL_CXY_FROM_XY( x , y );
251    }
252    while ( cluster_is_active( cxy ) == false );
253
254    return ( cxy );
255}
256
257////////////////////////////////////////
258bool_t cluster_is_undefined( cxy_t cxy )
259{
260    uint32_t  x_size = LOCAL_CLUSTER->x_size;
261    uint32_t  y_size = LOCAL_CLUSTER->y_size;
262
263    uint32_t  x      = HAL_X_FROM_CXY( cxy );
264    uint32_t  y      = HAL_Y_FROM_CXY( cxy );
265
266    if( x >= x_size ) return true;
267    if( y >= y_size ) return true;
268
269    return false;
270}
271
272//////////////////////////////////////
273bool_t cluster_is_active ( cxy_t cxy )
274{
275    uint32_t x = HAL_X_FROM_CXY( cxy );
276    uint32_t y = HAL_Y_FROM_CXY( cxy );
277
278    return ( LOCAL_CLUSTER->cluster_info[x][y] != 0 );
279}
280
281////////////////////////////////////////////////////////////////////////////////////
282//  Cores related functions
283////////////////////////////////////////////////////////////////////////////////////
284
285/////////////////////////////////
286lid_t cluster_select_local_core( void )
287{
288    uint32_t      min = 1000;
289    lid_t         sel = 0;
290    uint32_t      nthreads;
291    lid_t         lid;
292    scheduler_t * sched;
293
294    cluster_t * cluster = LOCAL_CLUSTER;
295
296    for( lid = 0 ; lid < cluster->cores_nr ; lid++ )
297    {
298        sched    = &cluster->core_tbl[lid].scheduler;
299        nthreads = sched->u_threads_nr + sched->k_threads_nr;
300
301        if( nthreads < min )
302        {
303            min = nthreads;
304            sel = lid;
305        }
306    }
307    return sel;
308}
309
310////////////////////////////////////////////////////////////////////////////////////
311//  Process related functions
312////////////////////////////////////////////////////////////////////////////////////
313
314
315//////////////////////////////////////////////////////
316xptr_t cluster_get_process_from_pid_in_cxy( cxy_t cxy,
317                                            pid_t pid )
318{
319    xptr_t      root_xp;       // xptr on root of list of processes in owner cluster
320    xptr_t      lock_xp;       // xptr on lock protecting this list
321    xptr_t      iter_xp;       // iterator
322    xptr_t      current_xp;    // xptr on current process descriptor
323    bool_t      found;
324
325    cluster_t * cluster = LOCAL_CLUSTER;
326
327    // get owner cluster and lpid
328    cxy_t   owner_cxy = CXY_FROM_PID( pid );
329    lpid_t  lpid      = LPID_FROM_PID( pid );
330
331    // get lock & root of list of copies from owner cluster
332    root_xp = XPTR( owner_cxy , &cluster->pmgr.copies_root[lpid] );
333    lock_xp = XPTR( owner_cxy , &cluster->pmgr.copies_lock[lpid] );
334
335    // take the lock protecting the list of processes
336    remote_queuelock_acquire( lock_xp );
337
338    // scan list of processes
339    found = false;
340    XLIST_FOREACH( root_xp , iter_xp )
341    {
342        current_xp  = XLIST_ELEMENT( iter_xp , process_t , copies_list );
343
344        if( GET_CXY( current_xp ) == cxy )
345        {
346            found = true;
347            break;
348        }
349    }
350
351    // release the lock protecting the list of processes
352    remote_queuelock_release( lock_xp );
353
354    // return extended pointer on process descriptor in owner cluster
355    if( found ) return current_xp;
356    else        return XPTR_NULL;
357
358}  // end cluster_get_process_from_pid_in_cxy()
359
360
361//////////////////////////////////////////////////////
362xptr_t cluster_get_owner_process_from_pid( pid_t pid )
363{
364    xptr_t      root_xp;       // xptr on root of list of processes in owner cluster
365    xptr_t      lock_xp;       // xptr on lock protecting this list
366    xptr_t      iter_xp;       // iterator
367    xptr_t      current_xp;    // xptr on current process descriptor
368    process_t * current_ptr;   // local pointer on current process
369    pid_t       current_pid;   // current process identifier
370    bool_t      found;
371
372    cluster_t * cluster = LOCAL_CLUSTER;
373
374    // get owner cluster and lpid
375    cxy_t  owner_cxy = CXY_FROM_PID( pid );
376
377    // get lock & root of list of process in owner cluster
378    root_xp = XPTR( owner_cxy , &cluster->pmgr.local_root );
379    lock_xp = XPTR( owner_cxy , &cluster->pmgr.local_lock );
380
381    // take the lock protecting the list of processes
382    remote_queuelock_acquire( lock_xp );
383
384    // scan list of processes in owner cluster
385    found = false;
386    XLIST_FOREACH( root_xp , iter_xp )
387    {
388        current_xp  = XLIST_ELEMENT( iter_xp , process_t , local_list );
389        current_ptr = GET_PTR( current_xp );
390        current_pid = hal_remote_l32( XPTR( owner_cxy , &current_ptr->pid ) );
391
392        if( current_pid == pid )
393        {
394            found = true;
395            break;
396        }
397    }
398
399    // release the lock protecting the list of processes
400    remote_queuelock_release( lock_xp );
401
402    // return extended pointer on process descriptor in owner cluster
403    if( found ) return current_xp;
404    else        return XPTR_NULL;
405
406}  // end cluster_get_owner_process_from_pid()
407
408
409//////////////////////////////////////////////////////////
410xptr_t cluster_get_reference_process_from_pid( pid_t pid )
411{
412    xptr_t ref_xp;   // extended pointer on reference process descriptor
413
414    cluster_t * cluster = LOCAL_CLUSTER;
415
416    // get owner cluster and lpid
417    cxy_t  owner_cxy = CXY_FROM_PID( pid );
418    lpid_t lpid      = LPID_FROM_PID( pid );
419
420    // Check valid PID
421    if( lpid >= CONFIG_MAX_PROCESS_PER_CLUSTER )  return XPTR_NULL;
422
423    if( local_cxy == owner_cxy )   // local cluster is owner cluster
424    {
425        ref_xp = cluster->pmgr.pref_tbl[lpid];
426    }
427    else                              // use a remote_lwd to access owner cluster
428    {
429        ref_xp = (xptr_t)hal_remote_l64( XPTR( owner_cxy , &cluster->pmgr.pref_tbl[lpid] ) );
430    }
431
432    return ref_xp;
433}
434
435///////////////////////////////////////////////
436error_t cluster_pid_alloc( process_t * process,
437                           pid_t     * pid )
438{
439    lpid_t      lpid;
440    bool_t      found;
441
442#if DEBUG_CLUSTER_PID_ALLOC
443uint32_t cycle = (uint32_t)hal_get_cycles();
444if( DEBUG_CLUSTER_PID_ALLOC < cycle )
445printk("\n[DBG] %s : thread %x enters in cluster %x / cycle %d\n",
446__FUNCTION__ , CURRENT_THREAD , local_cxy , cycle );
447#endif
448
449    pmgr_t    * pm         = &LOCAL_CLUSTER->pmgr;
450
451    // get the lock protecting pref_tbl
452    queuelock_acquire( &pm->pref_lock );
453
454    // search an empty slot
455    found = false;
456    for( lpid = 0 ; lpid < CONFIG_MAX_PROCESS_PER_CLUSTER ; lpid++ )
457    {
458        if( pm->pref_tbl[lpid] == XPTR_NULL )
459        {
460            found = true;
461            break;
462        }
463    }
464
465    if( found )
466    {
467        // register process in pref_tbl[]
468        pm->pref_tbl[lpid] = XPTR( local_cxy , process );
469        pm->pref_nr++;
470
471        // returns pid
472        *pid = PID( local_cxy , lpid );
473
474        // release the processs_manager lock
475        queuelock_release( &pm->pref_lock );
476
477        return 0;
478    }
479    else
480    {
481        // release the lock
482        queuelock_release( &pm->pref_lock );
483
484        return 0xFFFFFFFF;
485    }
486
487#if DEBUG_CLUSTER_PID_ALLOC
488cycle = (uint32_t)hal_get_cycles();
489if( DEBUG_CLUSTER_PID_ALLOC < cycle )
490printk("\n[DBG] %s : thread %x exit in cluster %x / pid %x / cycle %d\n",
491__FUNCTION__ , CURRENT_THREAD , local_cxy , *pid , cycle );
492#endif
493
494} // end cluster_pid_alloc()
495
496/////////////////////////////////////
497void cluster_pid_release( pid_t pid )
498{
499
500#if DEBUG_CLUSTER_PID_RELEASE
501uint32_t cycle = (uint32_t)hal_get_cycles();
502if( DEBUG_CLUSTER_PID_RELEASE < cycle )
503printk("\n[DBG] %s : thread %x enters in cluster %x / pid %x / cycle %d\n",
504__FUNCTION__ , CURRENT_THREAD , local_cxy , pid , cycle );
505#endif
506
507    cxy_t  owner_cxy  = CXY_FROM_PID( pid );
508    lpid_t lpid       = LPID_FROM_PID( pid );
509
510    pmgr_t  * pm = &LOCAL_CLUSTER->pmgr;
511
512    // check lpid
513    assert( (lpid < CONFIG_MAX_PROCESS_PER_CLUSTER),
514    "illegal LPID = %d" , lpid );
515
516    // check owner cluster
517    assert( (owner_cxy == local_cxy) ,
518    "local_cluster %x !=  owner_cluster %x" , local_cxy , owner_cxy );
519
520    // get the lock protecting pref_tbl
521    queuelock_acquire( &pm->pref_lock );
522
523    // remove process from pref_tbl[]
524    pm->pref_tbl[lpid] = XPTR_NULL;
525    pm->pref_nr--;
526
527    // release the processs_manager lock
528    queuelock_release( &pm->pref_lock );
529
530#if DEBUG_CLUSTER_PID_RELEASE
531cycle = (uint32_t)hal_get_cycles();
532if( DEBUG_CLUSTER_PID_RELEASE < cycle )
533printk("\n[DBG] %s : thread %x exit in cluster %x / cycle %d\n",
534__FUNCTION__ , CURRENT_THREAD , local_cxy , cycle );
535#endif
536
537} // end cluster_pid_release()
538
539///////////////////////////////////////////////////////////
540process_t * cluster_get_local_process_from_pid( pid_t pid )
541{
542    xptr_t         process_xp;
543    process_t    * process_ptr;
544    xptr_t         root_xp;
545    xptr_t         iter_xp;
546    bool_t         found;
547
548    found   = false;
549    root_xp = XPTR( local_cxy , &LOCAL_CLUSTER->pmgr.local_root );
550
551    XLIST_FOREACH( root_xp , iter_xp )
552    {
553        process_xp  = XLIST_ELEMENT( iter_xp , process_t , local_list );
554        process_ptr = (process_t *)GET_PTR( process_xp );
555        if( process_ptr->pid == pid )
556        {
557            found = true;
558            break;
559        }
560    }
561
562    if (found ) return process_ptr;
563    else        return NULL;
564
565}  // end cluster_get_local_process_from_pid()
566
567//////////////////////////////////////////////////////
568void cluster_process_local_link( process_t * process )
569{
570    pmgr_t * pm = &LOCAL_CLUSTER->pmgr;
571
572    // get extended pointers on local process list root & lock
573    xptr_t root_xp = XPTR( local_cxy , &pm->local_root );
574    xptr_t lock_xp = XPTR( local_cxy , &pm->local_lock );
575
576    // get lock protecting the local list
577    remote_queuelock_acquire( lock_xp );
578
579    // register process in local list
580    xlist_add_last( root_xp , XPTR( local_cxy , &process->local_list ) );
581    pm->local_nr++;
582
583    // release lock protecting the local list
584    remote_queuelock_release( lock_xp );
585}
586
587////////////////////////////////////////////////////////
588void cluster_process_local_unlink( process_t * process )
589{
590    pmgr_t * pm = &LOCAL_CLUSTER->pmgr;
591
592    // get extended pointers on local process list lock
593    xptr_t lock_xp = XPTR( local_cxy , &pm->local_lock );
594
595    // get lock protecting the local list
596    remote_queuelock_acquire( lock_xp );
597
598    // remove process from local list
599    xlist_unlink( XPTR( local_cxy , &process->local_list ) );
600    pm->local_nr--;
601
602    // release lock protecting the local list
603    remote_queuelock_release( lock_xp );
604}
605
606///////////////////////////////////////////////////////
607void cluster_process_copies_link( process_t * process )
608{
609    pmgr_t * pm = &LOCAL_CLUSTER->pmgr;
610
611#if DEBUG_CLUSTER_PROCESS_COPIES
612uint32_t cycle = (uint32_t)hal_get_cycles();
613if( DEBUG_CLUSTER_PROCESS_COPIES < cycle )
614printk("\n[DBG] %s enters / cluster %x / process %x / cycle %d\n",
615__FUNCTION__ , local_cxy , process , cycle );
616#endif
617
618    // get owner cluster identifier CXY and process LPID
619    pid_t    pid        = process->pid;
620    cxy_t    owner_cxy  = CXY_FROM_PID( pid );
621    lpid_t   lpid       = LPID_FROM_PID( pid );
622
623    // get extended pointer on lock protecting copies_list[lpid]
624    xptr_t copies_lock  = XPTR( owner_cxy , &pm->copies_lock[lpid] );
625
626    // get extended pointer on the copies_list[lpid] root
627    xptr_t copies_root  = XPTR( owner_cxy , &pm->copies_root[lpid] );
628
629    // get extended pointer on the local copies_list entry
630    xptr_t copies_entry = XPTR( local_cxy , &process->copies_list );
631
632    // get lock protecting copies_list[lpid]
633    remote_queuelock_acquire( copies_lock );
634
635    // add copy to copies_list
636    xlist_add_first( copies_root , copies_entry );
637    hal_remote_atomic_add( XPTR( owner_cxy , &pm->copies_nr[lpid] ) , 1 );
638
639    // release lock protecting copies_list[lpid]
640    remote_queuelock_release( copies_lock );
641
642#if DEBUG_CLUSTER_PROCESS_COPIES
643cycle = (uint32_t)hal_get_cycles();
644if( DEBUG_CLUSTER_PROCESS_COPIES < cycle )
645printk("\n[DBG] %s exit / cluster %x / process %x / cycle %d\n",
646__FUNCTION__ , local_cxy , process , cycle );
647#endif
648
649}  // end cluster_process_copies_link()
650
651/////////////////////////////////////////////////////////
652void cluster_process_copies_unlink( process_t * process )
653{
654    pmgr_t * pm = &LOCAL_CLUSTER->pmgr;
655
656#if DEBUG_CLUSTER_PROCESS_COPIES
657uint32_t cycle = (uint32_t)hal_get_cycles();
658if( DEBUG_CLUSTER_PROCESS_COPIES < cycle )
659printk("\n[DBG] %s enters / cluster %x / process %x / cycle %d\n",
660__FUNCTION__ , local_cxy , process , cycle );
661#endif
662
663    // get owner cluster identifier CXY and process LPID
664    pid_t    pid        = process->pid;
665    cxy_t    owner_cxy  = CXY_FROM_PID( pid );
666    lpid_t   lpid       = LPID_FROM_PID( pid );
667
668    // get extended pointer on lock protecting copies_list[lpid]
669    xptr_t copies_lock  = XPTR( owner_cxy , &pm->copies_lock[lpid] );
670
671    // get extended pointer on the local copies_list entry
672    xptr_t copies_entry = XPTR( local_cxy , &process->copies_list );
673
674    // get lock protecting copies_list[lpid]
675    remote_queuelock_acquire( copies_lock );
676
677    // remove copy from copies_list
678    xlist_unlink( copies_entry );
679    hal_remote_atomic_add( XPTR( owner_cxy , &pm->copies_nr[lpid] ) , -1 );
680
681    // release lock protecting copies_list[lpid]
682    remote_queuelock_release( copies_lock );
683
684#if DEBUG_CLUSTER_PROCESS_COPIES
685cycle = (uint32_t)hal_get_cycles();
686if( DEBUG_CLUSTER_PROCESS_COPIES < cycle )
687printk("\n[DBG] %s exit / cluster %x / process %x / cycle %d\n",
688__FUNCTION__ , local_cxy , process , cycle );
689#endif
690
691}  // end cluster_process_copies_unlink()
692
693///////////////////////////////////////////
694void cluster_processes_display( cxy_t cxy )
695{
696    xptr_t        root_xp;
697    xptr_t        lock_xp;
698    xptr_t        iter_xp;
699    xptr_t        process_xp;
700    cxy_t         txt0_cxy;
701    chdev_t     * txt0_ptr;
702    xptr_t        txt0_xp;
703    xptr_t        txt0_lock_xp;
704
705    assert( (cluster_is_undefined( cxy ) == false),
706    "illegal cluster index" );
707
708    // get extended pointer on root and lock for local process list in cluster
709    root_xp = XPTR( cxy , &LOCAL_CLUSTER->pmgr.local_root );
710    lock_xp = XPTR( cxy , &LOCAL_CLUSTER->pmgr.local_lock );
711
712    // get pointers on TXT0 chdev
713    txt0_xp  = chdev_dir.txt_tx[0];
714    txt0_cxy = GET_CXY( txt0_xp );
715    txt0_ptr = GET_PTR( txt0_xp );
716
717    // get extended pointer on TXT0 lock
718    txt0_lock_xp = XPTR( txt0_cxy , &txt0_ptr->wait_lock );
719
720    // get lock on local process list
721    remote_queuelock_acquire( lock_xp );
722
723    // get TXT0 lock
724    remote_busylock_acquire( txt0_lock_xp );
725     
726    // display header
727    nolock_printk("\n***** processes in cluster %x / cycle %d\n",
728    cxy , (uint32_t)hal_get_cycles() );
729
730    // loop on all processes in cluster cxy
731    XLIST_FOREACH( root_xp , iter_xp )
732    {
733        process_xp = XLIST_ELEMENT( iter_xp , process_t , local_list );
734        process_display( process_xp );
735    }
736
737    // release TXT0 lock
738    remote_busylock_release( txt0_lock_xp );
739
740    // release lock on local process list
741    remote_queuelock_release( lock_xp );
742
743}  // end cluster_processes_display()
744
745
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