model-net-lp.c 9.05 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11
/*
 * Copyright (C) 2014 University of Chicago.
 * See COPYRIGHT notice in top-level directory.
 *
 */

#include <stddef.h>
#include <assert.h>
#include "codes/model-net.h"
#include "codes/model-net-method.h"
#include "codes/model-net-lp.h"
12
#include "codes/model-net-sched.h"
13 14 15 16 17 18 19 20 21 22 23 24 25 26 27
#include "codes/codes_mapping.h"
#include "codes/jenkins-hash.h"

#define MN_NAME "model_net_base"

/**** BEGIN SIMULATION DATA STRUCTURES ****/

int model_net_base_magic;

// message-type specific offsets - don't want to get bitten later by alignment
// issues...
static int msg_offsets[MAX_NETS];

typedef struct model_net_base_state {
    int net_id;
28 29 30 31
    // whether scheduler loop is running
    int in_sched_loop;
    // model-net scheduler
    model_net_sched *sched;
32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133
    // lp type and state of underlying model net method - cache here so we
    // don't have to constantly look up
    const tw_lptype *sub_type;
    void *sub_state;
} model_net_base_state;

/**** END SIMULATION DATA STRUCTURES ****/

/**** BEGIN LP, EVENT PROCESSING FUNCTION DECLS ****/

/* ROSS LP processing functions */  
static void model_net_base_lp_init(
        model_net_base_state * ns,
        tw_lp * lp);
static void model_net_base_event(
        model_net_base_state * ns,
        tw_bf * b,
        model_net_wrap_msg * m,
        tw_lp * lp);
static void model_net_base_event_rc(
        model_net_base_state * ns,
        tw_bf * b,
        model_net_wrap_msg * m,
        tw_lp * lp);
static void model_net_base_finalize(
        model_net_base_state * ns,
        tw_lp * lp);

/* event type handlers */
static void handle_new_msg(
        model_net_base_state * ns,
        tw_bf *b,
        model_net_wrap_msg * m,
        tw_lp * lp);
static void handle_sched_next(
        model_net_base_state * ns,
        tw_bf *b,
        model_net_wrap_msg * m,
        tw_lp * lp);
static void handle_new_msg_rc(
        model_net_base_state * ns,
        tw_bf *b,
        model_net_wrap_msg * m,
        tw_lp * lp);
static void handle_sched_next_rc(
        model_net_base_state * ns,
        tw_bf *b,
        model_net_wrap_msg * m,
        tw_lp * lp);

/* ROSS function pointer table for this LP */
tw_lptype model_net_base_lp = {
     (init_f) model_net_base_lp_init,
     (event_f) model_net_base_event,
     (revent_f) model_net_base_event_rc,
     (final_f)  model_net_base_finalize, 
     (map_f) codes_mapping,
     sizeof(model_net_base_state),
};

/**** END LP, EVENT PROCESSING FUNCTION DECLS ****/

/**** BEGIN IMPLEMENTATIONS ****/

void model_net_base_init(){
    uint32_t h1=0, h2=0;

    bj_hashlittle2(MN_NAME, strlen(MN_NAME), &h1, &h2);
    model_net_base_magic = h1+h2;

    // here, we initialize ALL lp types to use the base type
    // TODO: only initialize ones that are actually used
    for (int i = 0; i < MAX_NETS; i++){
        lp_type_register(model_net_lp_config_names[i], &model_net_base_lp);
    }

    // initialize the msg-specific offsets
    msg_offsets[SIMPLENET] = offsetof(model_net_wrap_msg, msg.m_snet);
    msg_offsets[SIMPLEWAN] = offsetof(model_net_wrap_msg, msg.m_swan);
    msg_offsets[TORUS] = offsetof(model_net_wrap_msg, msg.m_torus);
    msg_offsets[DRAGONFLY] = offsetof(model_net_wrap_msg, msg.m_dfly);
    msg_offsets[LOGGP] = offsetof(model_net_wrap_msg, msg.m_loggp);
}

void model_net_base_lp_init(
        model_net_base_state * ns,
        tw_lp * lp){
    // obtain the underlying lp type through codes-mapping
    char grp_name[MAX_NAME_LENGTH], lp_type_name[MAX_NAME_LENGTH];
    int grp_id, lp_type_id, grp_rep_id, offset;

    codes_mapping_get_lp_info(lp->gid, grp_name, &grp_id, &lp_type_id,
            lp_type_name, &grp_rep_id, &offset);

    // find the corresponding method name / index
    for (int i = 0; i < MAX_NETS; i++){
        if (strcmp(model_net_lp_config_names[i], lp_type_name) == 0){
            ns->net_id = i;
            break;
        }
    }

134 135
    // TODO: parameterize scheduler type
    ns->sched = malloc(sizeof(model_net_sched));
136
    model_net_sched_init(mn_sched_type, method_array[ns->net_id], ns->sched);
137

138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203
    ns->sub_type = model_net_get_lp_type(ns->net_id);
    // NOTE: some models actually expect LP state to be 0 initialized...
    // *cough anything that uses mn_stats_array cough*
    ns->sub_state = calloc(1, ns->sub_type->state_sz);

    // initialize the model-net method
    ns->sub_type->init(ns->sub_state, lp);
}

void model_net_base_event(
        model_net_base_state * ns,
        tw_bf * b,
        model_net_wrap_msg * m,
        tw_lp * lp){
    assert(m->magic == model_net_base_magic);
    
    switch (m->event_type){
        case MN_BASE_NEW_MSG:
            handle_new_msg(ns, b, m, lp);
            break;
        case MN_BASE_SCHED_NEXT:
            handle_sched_next(ns, b, m, lp);
            break;
        case MN_BASE_PASS: ;
            void * sub_msg = ((char*)m)+msg_offsets[ns->net_id];
            ns->sub_type->event(ns->sub_state, b, sub_msg, lp);
            break;
        /* ... */
        default:
            assert(!"model_net_base event type not known");
            break;
    }
}

void model_net_base_event_rc(
        model_net_base_state * ns,
        tw_bf * b,
        model_net_wrap_msg * m,
        tw_lp * lp){
    assert(m->magic == model_net_base_magic);
    
    switch (m->event_type){
        case MN_BASE_NEW_MSG:
            handle_new_msg_rc(ns, b, m, lp);
            break;
        case MN_BASE_SCHED_NEXT:
            handle_sched_next_rc(ns, b, m, lp);
            break;
        case MN_BASE_PASS: ;
            void * sub_msg = ((char*)m)+msg_offsets[ns->net_id];
            ns->sub_type->revent(ns->sub_state, b, sub_msg, lp);
            break;
        /* ... */
        default:
            assert(!"model_net_base event type not known");
            break;
    }
}

void model_net_base_finalize(
        model_net_base_state * ns,
        tw_lp * lp){
    ns->sub_type->final(ns->sub_state, lp);
    free(ns->sub_state);
}

204 205
/// bitfields used:
/// c0 - we initiated a sched_next event
206 207 208 209 210
void handle_new_msg(
        model_net_base_state * ns,
        tw_bf *b,
        model_net_wrap_msg * m,
        tw_lp * lp){
211
    // simply pass down to the scheduler
212
    model_net_request *r = &m->msg.m_base.u.req;
213 214
    void * m_data = m+1;
    void *remote = NULL, *local = NULL;
215
    if (r->remote_event_size > 0){
216 217
        remote = m_data;
        m_data = (char*)m_data + r->remote_event_size;
218 219
    }
    if (r->self_event_size > 0){
220
        local = m_data;
221
    }
222 223 224 225 226 227
    
    model_net_sched_add(r, r->remote_event_size, remote, r->self_event_size,
            local, ns->sched, &m->msg.m_base.rc, lp);
    
    if (ns->in_sched_loop == 0){
        b->c0 = 1;
228
        tw_event *e = codes_event_new(lp->gid, codes_local_latency(lp), lp);
229 230 231 232 233 234
        model_net_wrap_msg *m = tw_event_data(e);
        m->event_type = MN_BASE_SCHED_NEXT;
        m->magic = model_net_base_magic;
        // m_base not used in sched event
        tw_event_send(e);
        ns->in_sched_loop = 1;
235 236
    }
}
237 238 239

void handle_new_msg_rc(
        model_net_base_state *ns,
240
        tw_bf *b,
241 242 243 244 245 246 247
        model_net_wrap_msg *m,
        tw_lp *lp){
    model_net_sched_add_rc(ns->sched, &m->msg.m_base.rc, lp);
    if (b->c0){
        codes_local_latency_reverse(lp);
        ns->in_sched_loop = 0;
    }
248
}
249 250 251 252

/// bitfields used
/// c0 - scheduler loop is finished
void handle_sched_next(
253 254 255 256
        model_net_base_state * ns,
        tw_bf *b,
        model_net_wrap_msg * m,
        tw_lp * lp){
257
    tw_stime poffset;
258 259
    int ret = model_net_sched_next(&poffset, ns->sched, m+1, 
            &m->msg.m_base.rc, lp);
260 261 262 263 264 265 266 267
    // we only need to know whether scheduling is finished or not - if not,
    // go to the 'next iteration' of the loop
    if (ret == -1){
        b->c0 = 1;
        ns->in_sched_loop = 0;
    }
    else {
        tw_event *e = codes_event_new(lp->gid, 
268
                poffset+codes_local_latency(lp), lp);
269 270 271 272 273
        model_net_wrap_msg *m = tw_event_data(e);
        m->event_type = MN_BASE_SCHED_NEXT;
        m->magic = model_net_base_magic;
        // no need to set m_base here
        tw_event_send(e);
274 275
    }
}
276

277 278 279 280 281
void handle_sched_next_rc(
        model_net_base_state * ns,
        tw_bf *b,
        model_net_wrap_msg * m,
        tw_lp * lp){
282
    model_net_sched_next_rc(ns->sched, m+1, &m->msg.m_base.rc, lp);
283 284 285 286 287 288 289

    if (b->c0){
        ns->in_sched_loop = 1;
    }
    else{
        codes_local_latency_reverse(lp);
    }
290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324
}

/**** END IMPLEMENTATIONS ****/

tw_event * model_net_method_event_new(
        tw_lpid dest_gid,
        tw_stime offset_ts,
        tw_lp *sender,
        int net_id,
        void **msg_data,
        void **extra_data){
    tw_event *e = tw_event_new(dest_gid, offset_ts, sender);
    model_net_wrap_msg *m_wrap = tw_event_data(e);
    m_wrap->event_type = MN_BASE_PASS;
    m_wrap->magic = model_net_base_magic;
    *msg_data = ((char*)m_wrap)+msg_offsets[net_id];
    // extra_data is optional
    if (extra_data != NULL){
        *extra_data = m_wrap + 1;
    }
    return e;
}

void * model_net_method_get_edata(int net_id, void *msg){
    return (char*)msg + sizeof(model_net_wrap_msg) - msg_offsets[net_id];
}

/*
 * Local variables:
 *  c-indent-level: 4
 *  c-basic-offset: 4
 * End:
 *
 * vim: ft=c ts=8 sts=4 sw=4 expandtab
 */