model-net-mpi-replay.c 49.7 KB
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/*
 * Copyright (C) 2014 University of Chicago.
 * See COPYRIGHT notice in top-level directory.
 *
 */
#include <ross.h>
#include <inttypes.h>

#include "codes/codes-workload.h"
#include "codes/codes.h"
#include "codes/configuration.h"
#include "codes/codes_mapping.h"
#include "codes/model-net.h"
#include "codes/rc-stack.h"
#include "codes/quicklist.h"
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#include "codes/codes-jobmap.h"
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/* turning on track lp will generate a lot of output messages */
#define TRACK_LP -1
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#define TRACE -1
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#define MAX_WAIT_REQS 512
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#define CS_LP_DBG 0
#define lprintf(_fmt, ...) \
        do {if (CS_LP_DBG) printf(_fmt, __VA_ARGS__);} while (0)
#define MAX_STATS 65536
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char workload_type[128];
char workload_file[8192];
char offset_file[8192];
static int wrkld_id;
static int num_net_traces = 0;
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static int alloc_spec = 0;
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/* Doing LP IO*/
static char lp_io_dir[256] = {'\0'};
static lp_io_handle io_handle;
static unsigned int lp_io_use_suffix = 0;
static int do_lp_io = 0;

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/* variables for loading multiple applications */
/* Xu's additions start */
char workloads_conf_file[8192];
char alloc_file[8192];
int num_traces_of_job[5];
char file_name_of_job[5][8192];

struct codes_jobmap_ctx *jobmap_ctx;
struct codes_jobmap_params_list jobmap_p;
/* Xu's additions end */

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typedef struct nw_state nw_state;
typedef struct nw_message nw_message;
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typedef int32_t dumpi_req_id;
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static int net_id = 0;
static float noise = 5.0;
static int num_net_lps, num_nw_lps;

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FILE * workload_log = NULL;
FILE * workload_agg_log = NULL;
FILE * workload_meta_log = NULL;

static uint64_t sample_bytes_written = 0;
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long long num_bytes_sent=0;
long long num_bytes_recvd=0;

double max_time = 0,  max_comm_time = 0, max_wait_time = 0, max_send_time = 0, max_recv_time = 0;
double avg_time = 0, avg_comm_time = 0, avg_wait_time = 0, avg_send_time = 0, avg_recv_time = 0;

/* global variables for codes mapping */
static char lp_group_name[MAX_NAME_LENGTH], lp_type_name[MAX_NAME_LENGTH], annotation[MAX_NAME_LENGTH];
static int mapping_grp_id, mapping_type_id, mapping_rep_id, mapping_offset;

/* runtime option for disabling computation time simulation */
static int disable_delay = 0;
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static int enable_sampling = 0;
static double sampling_interval = 5000000;
static double sampling_end_time = 3000000000;
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static int enable_debug = 1;
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/* MPI_OP_GET_NEXT is for getting next MPI operation when the previous operation completes.
* MPI_SEND_ARRIVED is issued when a MPI message arrives at its destination (the message is transported by model-net and an event is invoked when it arrives. 
* MPI_SEND_POSTED is issued when a MPI message has left the source LP (message is transported via model-net). */
enum MPI_NW_EVENTS
{
	MPI_OP_GET_NEXT=1,
	MPI_SEND_ARRIVED,
    MPI_SEND_ARRIVED_CB, // for tracking message times on sender
	MPI_SEND_POSTED,
};

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struct mpi_workload_sample
{
    /* Sampling data */
    int nw_id;
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    int app_id;
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    unsigned long num_sends_sample;
    unsigned long num_bytes_sample;
    unsigned long num_waits_sample;
    double sample_end_time;
};
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/* stores pointers of pending MPI operations to be matched with their respective sends/receives. */
struct mpi_msgs_queue
{
    int op_type;
    int tag;
    int source_rank;
    int dest_rank;
    int num_bytes;
    tw_stime req_init_time;
	dumpi_req_id req_id;
    struct qlist_head ql;
};

/* stores request IDs of completed MPI operations (Isends or Irecvs) */
struct completed_requests
{
	dumpi_req_id req_id;
    struct qlist_head ql;
};

/* for wait operations, store the pending operation and number of completed waits so far. */
struct pending_waits
{
    int op_type;
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    int32_t req_ids[MAX_WAIT_REQS];
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	int num_completed;
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	int count;
    tw_stime start_time;
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    struct qlist_head ql;
};

typedef struct mpi_msgs_queue mpi_msgs_queue;
typedef struct completed_requests completed_requests;
typedef struct pending_waits pending_waits;

/* state of the network LP. It contains the pointers to send/receive lists */
struct nw_state
{
	long num_events_per_lp;
	tw_lpid nw_id;
	short wrkld_end;
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    int app_id;
    int local_rank;
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    struct rc_stack * processed_ops;
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    struct rc_stack * matched_reqs;
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    /* count of sends, receives, collectives and delays */
	unsigned long num_sends;
	unsigned long num_recvs;
	unsigned long num_cols;
	unsigned long num_delays;
	unsigned long num_wait;
	unsigned long num_waitall;
	unsigned long num_waitsome;

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	/* time spent by the LP in executing the app trace*/
	double start_time;
	double elapsed_time;
	/* time spent in compute operations */
	double compute_time;
	/* time spent in message send/isend */
	double send_time;
	/* time spent in message receive */
	double recv_time;
	/* time spent in wait operation */
	double wait_time;
	/* FIFO for isend messages arrived on destination */
	struct qlist_head arrival_queue;
	/* FIFO for irecv messages posted but not yet matched with send operations */
	struct qlist_head pending_recvs_queue;
	/* List of completed send/receive requests */
	struct qlist_head completed_reqs;
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    tw_stime cur_interval_end;

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    /* Pending wait operation */
    struct pending_waits * wait_op;
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    unsigned long num_bytes_sent;
    unsigned long num_bytes_recvd;

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    /* For sampling data */
    int sampling_indx;
    int max_arr_size;
    struct mpi_workload_sample * mpi_wkld_samples;
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    char output_buf[512];
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};

/* data for handling reverse computation.
* saved_matched_req holds the request ID of matched receives/sends for wait operations.
* ptr_match_op holds the matched MPI operation which are removed from the queues when a send is matched with the receive in forward event handler. 
* network event being sent. op is the MPI operation issued by the network workloads API. rv_data holds the data for reverse computation (TODO: Fill this data structure only when the simulation runs in optimistic mode). */
struct nw_message
{
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   // forward message handler 
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   int msg_type;
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   int op_type;
   
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   struct
   {
       tw_lpid src_rank;
       tw_lpid dest_rank;
       int num_bytes;
       int num_matched;
       int data_type;
       double sim_start_time;
       // for callbacks - time message was received
       double msg_send_time;
       int16_t req_id;   
       int tag;
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       int app_id;
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       int found_match;
       short wait_completed;
   } fwd;
   struct
   {
       double saved_send_time;
       double saved_recv_time;
       double saved_wait_time;
       double saved_delay;
       int saved_num_bytes;
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       struct codes_workload_op * saved_op;
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   } rc;
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};

/* executes MPI isend and send operations */
static void codes_exec_mpi_send(
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        nw_state* s, tw_bf * bf, nw_message * m, tw_lp* lp, struct codes_workload_op * mpi_op);
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/* execute MPI irecv operation */
static void codes_exec_mpi_recv(
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        nw_state* s, tw_bf * bf, nw_message * m, tw_lp * lp, struct codes_workload_op * mpi_op);
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/* reverse of mpi recv function. */
static void codes_exec_mpi_recv_rc(
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        nw_state* s, tw_bf * bf, nw_message* m, tw_lp* lp);
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/* execute the computational delay */
static void codes_exec_comp_delay(
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        nw_state* s, nw_message * m, tw_lp* lp, struct codes_workload_op * mpi_op);
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/* gets the next MPI operation from the network-workloads API. */
static void get_next_mpi_operation(
        nw_state* s, tw_bf * bf, nw_message * m, tw_lp * lp);
/* reverse handler of get next mpi operation. */
static void get_next_mpi_operation_rc(
        nw_state* s, tw_bf * bf, nw_message * m, tw_lp * lp);
/* Makes a call to get_next_mpi_operation. */
static void codes_issue_next_event(tw_lp* lp);
/* reverse handler of next operation */
static void codes_issue_next_event_rc(tw_lp* lp);


///////////////////// HELPER FUNCTIONS FOR MPI MESSAGE QUEUE HANDLING ///////////////
/* upon arrival of local completion message, inserts operation in completed send queue */
/* upon arrival of an isend operation, updates the arrival queue of the network */
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static void update_completed_queue(
        nw_state * s, tw_bf * bf, nw_message * m, tw_lp * lp, dumpi_req_id req_id);
/* reverse of the above function */
static void update_completed_queue_rc(
        nw_state*s,
        tw_bf * bf,
        nw_message * m,
        tw_lp * lp);
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static void update_arrival_queue(
        nw_state*s, tw_bf* bf, nw_message* m, tw_lp * lp);
/* reverse of the above function */
static void update_arrival_queue_rc(
        nw_state*s, tw_bf* bf, nw_message* m, tw_lp * lp);
/* callback to a message sender for computing message time */
static void update_message_time(
        nw_state*s, tw_bf* bf, nw_message* m, tw_lp * lp);
/* reverse for computing message time */
static void update_message_time_rc(
        nw_state*s, tw_bf* bf, nw_message* m, tw_lp * lp);

/* conversion from seconds to eanaoseconds */
static tw_stime s_to_ns(tw_stime ns);

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/* Debugging functions, may generate unused function warning */
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static void print_waiting_reqs(int32_t * reqs, int count)
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{
    printf("\n Waiting reqs: ");
    int i;
    for(i = 0; i < count; i++ )
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        printf(" %d ", reqs[i]);
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}
static void print_completed_queue(struct qlist_head * head)
{
    printf("\n Completed queue: ");
      struct qlist_head * ent = NULL;
      struct completed_requests* current = NULL;
      qlist_for_each(ent, head)
       {
            current = qlist_entry(ent, completed_requests, ql);
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            printf(" %d ", current->req_id);
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       }
}
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static int clear_completed_reqs(nw_state * s,
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        tw_lp * lp,
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        int32_t * reqs, int count)
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{
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    int i, matched = 0;
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    for( i = 0; i < count; i++)
    {
      struct qlist_head * ent = NULL;
      qlist_for_each(ent, &s->completed_reqs)
       {
            struct completed_requests* current = 
                qlist_entry(ent, completed_requests, ql);
            if(current->req_id == reqs[i])
            {
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                ++matched;
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                qlist_del(&current->ql);
                rc_stack_push(lp, current, free, s->matched_reqs);
            }
       }
    }
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    return matched;
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}
static void add_completed_reqs(nw_state * s, 
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        tw_lp * lp,
        int count)
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{
    int i;
    for( i = 0; i < count; i++)
    {
       struct completed_requests * req = rc_stack_pop(s->matched_reqs); 
       qlist_add(&req->ql, &s->completed_reqs); 
    }
}
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/* helper function - maps an MPI rank to an LP id */
static tw_lpid rank_to_lpid(int rank)
{
    return codes_mapping_get_lpid_from_relative(rank, NULL, "nw-lp", NULL, 0);
}

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static int notify_posted_wait(nw_state* s,
        tw_bf * bf, nw_message * m, tw_lp * lp, 
        dumpi_req_id completed_req)
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{
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    struct pending_waits* wait_elem = s->wait_op;
    int wait_completed = 0;
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    m->fwd.wait_completed = 0;
    
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    if(!wait_elem)
        return 0;
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    int op_type = wait_elem->op_type;
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    if(op_type == CODES_WK_WAIT &&
            (wait_elem->req_ids[0] == completed_req))
    {
            wait_completed = 1;
    }
    else if(op_type == CODES_WK_WAITALL 
            || op_type == CODES_WK_WAITANY 
            || op_type == CODES_WK_WAITSOME)
    {
        int i;
        for(i = 0; i < wait_elem->count; i++)
        {
            if(wait_elem->req_ids[i] == completed_req)
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            {
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                wait_elem->num_completed++;
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                if(wait_elem->num_completed > wait_elem->count)
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                    printf("\n Num completed %d count %d LP %llu ",
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                            wait_elem->num_completed,
                            wait_elem->count,
                            lp->gid);
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                assert(wait_elem->num_completed <= wait_elem->count);
                if(wait_elem->num_completed == wait_elem->count)
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                {
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                    if(enable_debug)
                        fprintf(workload_log, "\n(%lf) APP ID %d MPI WAITALL COMPLETED AT %ld ", s->app_id, tw_now(lp), s->nw_id);
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                    wait_completed = 1;
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                }
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                m->fwd.wait_completed = 1;
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            }
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        }
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    }
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    return wait_completed;
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}
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/* reverse handler of MPI wait operation */
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static void codes_exec_mpi_wait_rc(nw_state* s, tw_lp* lp)
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{
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    if(s->wait_op)
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     {
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         struct pending_waits * wait_op = s->wait_op;
         free(wait_op);
         s->wait_op = NULL;
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     }
   else
    {
        codes_issue_next_event_rc(lp);
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        completed_requests * qi = rc_stack_pop(s->processed_ops);
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        qlist_add(&qi->ql, &s->completed_reqs);
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    }
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    return;
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}
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/* execute MPI wait operation */
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static void codes_exec_mpi_wait(nw_state* s, tw_lp* lp, struct codes_workload_op * mpi_op)
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{
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    /* check in the completed receives queue if the request ID has already been completed.*/
    assert(!s->wait_op);
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    dumpi_req_id req_id = mpi_op->u.wait.req_id;
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    struct completed_requests* current = NULL;
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    struct qlist_head * ent = NULL;
    qlist_for_each(ent, &s->completed_reqs)
    {
        current = qlist_entry(ent, completed_requests, ql);
        if(current->req_id == req_id)
        {
            qlist_del(&current->ql);
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            rc_stack_push(lp, current, free, s->processed_ops);
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            codes_issue_next_event(lp);
            return;
        }
    }
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    /* If not, add the wait operation in the pending 'waits' list. */
    struct pending_waits* wait_op = malloc(sizeof(struct pending_waits));
    wait_op->op_type = mpi_op->op_type;
    wait_op->req_ids[0] = req_id;
    wait_op->count = 1;
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    wait_op->num_completed = 0;
    wait_op->start_time = tw_now(lp);
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    s->wait_op = wait_op;
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    return;
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}

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static void codes_exec_mpi_wait_all_rc(
        nw_state* s, 
        tw_bf * bf,
        nw_message * m,
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        tw_lp* lp)
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{
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  if(bf->c1)
  {
    int sampling_indx = s->sampling_indx;
    s->mpi_wkld_samples[sampling_indx].num_waits_sample--;

    if(bf->c2)
    {
        s->cur_interval_end -= sampling_interval;
        s->sampling_indx--;
    }
  }
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  if(s->wait_op)
  {
      struct pending_waits * wait_op = s->wait_op;
      free(wait_op);
      s->wait_op = NULL;
  }
  else
  {
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      add_completed_reqs(s, lp, m->fwd.num_matched);
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      codes_issue_next_event_rc(lp);
  }
  return;
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}
static void codes_exec_mpi_wait_all(
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        nw_state* s, 
        tw_bf * bf,
        nw_message * m,
        tw_lp* lp, 
        struct codes_workload_op * mpi_op)
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{
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  if(enable_debug)
    fprintf(workload_log, "\n MPI WAITALL POSTED AT %ld ", s->nw_id);
  
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  if(enable_sampling)
  {
    bf->c1 = 1;
    if(tw_now(lp) >= s->cur_interval_end)
    {
        bf->c2 = 1;
        int indx = s->sampling_indx;
        s->mpi_wkld_samples[indx].nw_id = s->nw_id;
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        s->mpi_wkld_samples[indx].app_id = s->app_id;
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        s->mpi_wkld_samples[indx].sample_end_time = s->cur_interval_end;
        s->cur_interval_end += sampling_interval;
        s->sampling_indx++;
    }
    if(s->sampling_indx >= MAX_STATS)
    {
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        struct mpi_workload_sample * tmp = calloc((MAX_STATS + s->max_arr_size), sizeof(struct mpi_workload_sample));
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        memcpy(tmp, s->mpi_wkld_samples, s->sampling_indx);
        free(s->mpi_wkld_samples);
        s->mpi_wkld_samples = tmp;
        s->max_arr_size += MAX_STATS;
    }
    int indx = s->sampling_indx;
    s->mpi_wkld_samples[indx].num_waits_sample++;
  }
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  int count = mpi_op->u.waits.count;
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  /* If the count is not less than max wait reqs then stop */
  assert(count < MAX_WAIT_REQS);
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  int i = 0, num_matched = 0;
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  m->fwd.num_matched = 0;
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  /*if(lp->gid == TRACK)
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  {
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      printf("\n MPI Wait all posted ");
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      print_waiting_reqs(mpi_op->u.waits.req_ids, count);
      print_completed_queue(&s->completed_reqs);
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  }*/
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      /* check number of completed irecvs in the completion queue */ 
  for(i = 0; i < count; i++)
  {
      dumpi_req_id req_id = mpi_op->u.waits.req_ids[i];
      struct qlist_head * ent = NULL;
      struct completed_requests* current = NULL;
      qlist_for_each(ent, &s->completed_reqs)
       {
            current = qlist_entry(ent, completed_requests, ql);
            if(current->req_id == req_id)
                num_matched++;
       }
  }
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  m->fwd.found_match = num_matched;
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  if(num_matched == count)
  {
    /* No need to post a MPI Wait all then, issue next event */
      /* Remove all completed requests from the list */
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      m->fwd.num_matched = clear_completed_reqs(s, lp, mpi_op->u.waits.req_ids, count);
      struct pending_waits* wait_op = s->wait_op;
      free(wait_op);
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      s->wait_op = NULL;
      codes_issue_next_event(lp);
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  }
  else
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  {
      /* If not, add the wait operation in the pending 'waits' list. */
	  struct pending_waits* wait_op = malloc(sizeof(struct pending_waits));
	  wait_op->count = count;
      wait_op->op_type = mpi_op->op_type;
      assert(count < MAX_WAIT_REQS);

      for(i = 0; i < count; i++)
          wait_op->req_ids[i] =  mpi_op->u.waits.req_ids[i];

	  wait_op->num_completed = num_matched;
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	  wait_op->start_time = tw_now(lp);
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      s->wait_op = wait_op;
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  }
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  return;
}
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/* search for a matching mpi operation and remove it from the list. 
 * Record the index in the list from where the element got deleted. 
 * Index is used for inserting the element once again in the queue for reverse computation. */
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static int rm_matching_rcv(nw_state * ns, 
        tw_bf * bf,
        nw_message * m, 
        tw_lp * lp, 
        mpi_msgs_queue * qitem)
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{
    int matched = 0;
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    int index = 0;
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    struct qlist_head *ent = NULL;
    mpi_msgs_queue * qi = NULL;
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    qlist_for_each(ent, &ns->pending_recvs_queue){
        qi = qlist_entry(ent, mpi_msgs_queue, ql);
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        if((qi->num_bytes == qitem->num_bytes)
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                && ((qi->tag == qitem->tag) || qi->tag == -1)
                && ((qi->source_rank == qitem->source_rank) || qi->source_rank == -1))
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        {
            matched = 1;
            break;
        }
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        ++index;
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    }
    
    if(matched)
    {
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        m->rc.saved_recv_time = ns->recv_time;
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        ns->recv_time += (tw_now(lp) - qi->req_init_time);
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        if(qi->op_type == CODES_WK_IRECV)
            update_completed_queue(ns, bf, m, lp, qi->req_id);
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        qlist_del(&qi->ql);
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        rc_stack_push(lp, qi, free, ns->processed_ops);
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        return index;
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    }
    return -1;
}

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static int rm_matching_send(nw_state * ns, 
        tw_bf * bf,
        nw_message * m,
        tw_lp * lp, mpi_msgs_queue * qitem)
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{
    int matched = 0;
    struct qlist_head *ent = NULL;
    mpi_msgs_queue * qi = NULL;

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    int index = 0;
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    qlist_for_each(ent, &ns->arrival_queue){
        qi = qlist_entry(ent, mpi_msgs_queue, ql);
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        if((qi->num_bytes == qitem->num_bytes) 
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                && (qi->tag == qitem->tag || qitem->tag == -1)
                && ((qi->source_rank == qitem->source_rank) || qitem->source_rank == -1))
        {
            matched = 1;
            break;
        }
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        ++index;
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    }

    if(matched)
    {
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        m->rc.saved_recv_time = ns->recv_time;
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        ns->recv_time += (tw_now(lp) - qitem->req_init_time);

        if(qitem->op_type == CODES_WK_IRECV)
            update_completed_queue(ns, bf, m, lp, qitem->req_id);

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        qlist_del(&qi->ql);
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        return index;
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    }
    return -1;
}
static void codes_issue_next_event_rc(tw_lp * lp)
{
	    tw_rand_reverse_unif(lp->rng);	
}

/* Trigger getting next event at LP */
static void codes_issue_next_event(tw_lp* lp)
{
   tw_event *e;
   nw_message* msg;

   tw_stime ts;

   ts = g_tw_lookahead + 0.1 + tw_rand_exponential(lp->rng, noise);
   e = tw_event_new( lp->gid, ts, lp );
   msg = tw_event_data(e);

   msg->msg_type = MPI_OP_GET_NEXT;
   tw_event_send(e);
}

/* Simulate delays between MPI operations */
static void codes_exec_comp_delay(
659
        nw_state* s, nw_message * m, tw_lp* lp, struct codes_workload_op * mpi_op)
660 661 662 663 664
{
	tw_event* e;
	tw_stime ts;
	nw_message* msg;

665
    m->rc.saved_delay = s->compute_time;
666 667
    s->compute_time += s_to_ns(mpi_op->u.delay.seconds);
    ts = s_to_ns(mpi_op->u.delay.seconds);
668 669 670 671 672 673 674 675 676 677 678

	ts += g_tw_lookahead + 0.1 + tw_rand_exponential(lp->rng, noise);
	
	e = tw_event_new( lp->gid, ts , lp );
	msg = tw_event_data(e);
	msg->msg_type = MPI_OP_GET_NEXT;
	tw_event_send(e); 
                
}

/* reverse computation operation for MPI irecv */
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static void codes_exec_mpi_recv_rc(
        nw_state* ns, 
        tw_bf * bf, 
        nw_message* m, 
683
        tw_lp* lp)
684
{
685
	num_bytes_recvd -= m->rc.saved_num_bytes;
686 687
	ns->recv_time = m->rc.saved_recv_time;
	if(m->fwd.found_match >= 0)
688
	  {
689
		ns->recv_time = m->rc.saved_recv_time;
690
        int queue_count = qlist_count(&ns->arrival_queue); 
691
        
692
        mpi_msgs_queue * qi = rc_stack_pop(ns->processed_ops);	
693
       
694
        if(!m->fwd.found_match)
695 696 697
        {
            qlist_add(&qi->ql, &ns->arrival_queue);
        }
698
        else if(m->fwd.found_match >= queue_count)
699 700 701
        {
            qlist_add_tail(&qi->ql, &ns->arrival_queue);
        }
702
        else if(m->fwd.found_match > 0 && m->fwd.found_match < queue_count) 
703
        {
704 705 706 707
            int index = 1;
            struct qlist_head * ent = NULL;
            qlist_for_each(ent, &ns->arrival_queue)
            {
708
               if(index == m->fwd.found_match)
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               {
                 qlist_add(&qi->ql, ent);
                 break;
               }
               index++; 
            }
715
        }
716
        if(qi->op_type == CODES_WK_IRECV)
717
        {
718
            update_completed_queue_rc(ns, bf, m, lp);
719
        }
720 721
        codes_issue_next_event_rc(lp);
      }
722
	else if(m->fwd.found_match < 0)
723
	    {
724 725 726 727
            struct qlist_head * ent = qlist_pop_back(&ns->pending_recvs_queue); 
            mpi_msgs_queue * qi = qlist_entry(ent, mpi_msgs_queue, ql);
            free(qi);
            
728
            if(m->op_type == CODES_WK_IRECV)
729
                codes_issue_next_event_rc(lp);
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	    }
}

/* Execute MPI Irecv operation (non-blocking receive) */ 
734 735 736 737 738 739
static void codes_exec_mpi_recv(
        nw_state* s, 
        tw_bf * bf,
        nw_message * m, 
        tw_lp* lp, 
        struct codes_workload_op * mpi_op)
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{
/* Once an irecv is posted, list of completed sends is checked to find a matching isend.
   If no matching isend is found, the receive operation is queued in the pending queue of
   receive operations. */

745
	m->rc.saved_recv_time = s->recv_time;
746 747
    m->rc.saved_num_bytes = mpi_op->u.recv.num_bytes;

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	num_bytes_recvd += mpi_op->u.recv.num_bytes;

    mpi_msgs_queue * recv_op = (mpi_msgs_queue*) malloc(sizeof(mpi_msgs_queue));
    recv_op->req_init_time = tw_now(lp);
    recv_op->op_type = mpi_op->op_type;
    recv_op->source_rank = mpi_op->u.recv.source_rank;
    recv_op->dest_rank = mpi_op->u.recv.dest_rank;
    recv_op->num_bytes = mpi_op->u.recv.num_bytes;
    recv_op->tag = mpi_op->u.recv.tag;
    recv_op->req_id = mpi_op->u.recv.req_id;

759 760 761 762
    if(s->nw_id == TRACK_LP)
        printf("\n Receive op posted num bytes %d source %d ", recv_op->num_bytes,
                recv_op->source_rank);

763
	int found_matching_sends = rm_matching_send(s, bf, m, lp, recv_op);
764 765 766 767

	/* save the req id inserted in the completed queue for reverse computation. */
	if(found_matching_sends < 0)
	  {
768
	   	  m->fwd.found_match = -1;
769
          qlist_add_tail(&recv_op->ql, &s->pending_recvs_queue);
770 771 772 773 774 775 776
	
	       /* for mpi irecvs, this is a non-blocking receive so just post it and move on with the trace read. */
		if(mpi_op->op_type == CODES_WK_IRECV)
		   {
			codes_issue_next_event(lp);	
			return;
		   }
777
      }
778 779
	else
	  {
780
        m->fwd.found_match = found_matching_sends;
781
        codes_issue_next_event(lp); 
782 783
	    rc_stack_push(lp, recv_op, free, s->processed_ops);
      }
784 785
}

786 787 788 789 790 791 792 793
int get_global_id_of_job_rank(tw_lpid job_rank, int app_id)
{
    struct codes_jobmap_id lid;
    lid.job = app_id;
    lid.rank = job_rank;
    int global_rank = codes_jobmap_to_global_id(lid, jobmap_ctx);
    return global_rank;
}
794
/* executes MPI send and isend operations */
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static void codes_exec_mpi_send(nw_state* s, 
        tw_bf * bf,
        nw_message * m,
        tw_lp* lp, 
        struct codes_workload_op * mpi_op)
800
{
801 802 803 804 805 806 807 808
	/* model-net event */
    int global_dest_rank = mpi_op->u.send.dest_rank;
    
    if(alloc_spec)
    {
        global_dest_rank = get_global_id_of_job_rank(mpi_op->u.send.dest_rank, s->app_id);
    }

809
    m->rc.saved_num_bytes = mpi_op->u.send.num_bytes;
810 811 812 813 814 815 816 817
	/* model-net event */
	tw_lpid dest_rank;
	codes_mapping_get_lp_info(lp->gid, lp_group_name, &mapping_grp_id, 
	    lp_type_name, &mapping_type_id, annotation, &mapping_rep_id, &mapping_offset);

	if(net_id == DRAGONFLY) /* special handling for the dragonfly case */
	{
		int num_routers, lps_per_rep, factor;
818 819
		num_routers = codes_mapping_get_lp_count(lp_group_name, 1,
                  "modelnet_dragonfly_router", NULL, 1);
820
	 	lps_per_rep = (2 * num_nw_lps) + num_routers;	
821 822
		factor = global_dest_rank / num_nw_lps;
		dest_rank = (lps_per_rep * factor) + (global_dest_rank % num_nw_lps);	
823 824 825 826 827
	}
	else
	{
		/* other cases like torus/simplenet/loggp etc. */
		codes_mapping_get_lp_id(lp_group_name, lp_type_name, NULL, 1,  
828
	    	  global_dest_rank, mapping_offset, &dest_rank);
829 830 831
	}

	num_bytes_sent += mpi_op->u.send.num_bytes;
832
    s->num_bytes_sent += mpi_op->u.send.num_bytes;
833

834 835 836 837 838 839 840
    if(enable_sampling)
    {
        if(tw_now(lp) >= s->cur_interval_end)
        {
            bf->c1 = 1;
            int indx = s->sampling_indx;
            s->mpi_wkld_samples[indx].nw_id = s->nw_id;
841
            s->mpi_wkld_samples[indx].app_id = s->app_id;
842 843 844 845 846 847
            s->mpi_wkld_samples[indx].sample_end_time = s->cur_interval_end;
            s->sampling_indx++;
            s->cur_interval_end += sampling_interval; 
        }
        if(s->sampling_indx >= MAX_STATS)
        {
848
            struct mpi_workload_sample * tmp = calloc((MAX_STATS + s->max_arr_size), sizeof(struct mpi_workload_sample));
849 850 851 852 853 854 855 856 857
            memcpy(tmp, s->mpi_wkld_samples, s->sampling_indx);
            free(s->mpi_wkld_samples);
            s->mpi_wkld_samples = tmp;
            s->max_arr_size += MAX_STATS;
        }
        int indx = s->sampling_indx;
        s->mpi_wkld_samples[indx].num_sends_sample++;
        s->mpi_wkld_samples[indx].num_bytes_sample += mpi_op->u.send.num_bytes;
    }
858 859 860
	nw_message local_m;
	nw_message remote_m;

861 862 863
    local_m.fwd.sim_start_time = tw_now(lp);
    local_m.fwd.dest_rank = mpi_op->u.send.dest_rank;
    local_m.fwd.src_rank = mpi_op->u.send.source_rank;
864
    local_m.op_type = mpi_op->op_type; 
865
    local_m.msg_type = MPI_SEND_POSTED;
866 867 868
    local_m.fwd.tag = mpi_op->u.send.tag;
    local_m.fwd.num_bytes = mpi_op->u.send.num_bytes;
    local_m.fwd.req_id = mpi_op->u.send.req_id;
869
    local_m.fwd.app_id = s->app_id;
870 871 872 873 874 875 876

    remote_m = local_m;
	remote_m.msg_type = MPI_SEND_ARRIVED;

	model_net_event(net_id, "test", dest_rank, mpi_op->u.send.num_bytes, 0.0, 
	    sizeof(nw_message), (const void*)&remote_m, sizeof(nw_message), (const void*)&local_m, lp);

877 878 879 880 881 882 883 884 885 886 887
    if(enable_debug)
    {
        if(mpi_op->op_type == CODES_WK_ISEND)
        {
            fprintf(workload_log, "\n (%lf) APP %d MPI ISEND SOURCE %ld DEST %ld BYTES %ld ", 
                    tw_now(lp), s->app_id, s->nw_id, mpi_op->u.send.dest_rank, mpi_op->u.send.num_bytes);
        }
        else
            fprintf(workload_log, "\n (%lf) APP ID %d MPI SEND SOURCE %ld DEST %ld BYTES %ld ", 
                    tw_now(lp), s->app_id, s->nw_id, mpi_op->u.send.dest_rank, mpi_op->u.send.num_bytes);
        }
888 889 890 891 892 893 894 895 896 897 898
	/* isend executed, now get next MPI operation from the queue */ 
	if(mpi_op->op_type == CODES_WK_ISEND)
	   codes_issue_next_event(lp);
}

/* convert seconds to ns */
static tw_stime s_to_ns(tw_stime ns)
{
    return(ns * (1000.0 * 1000.0 * 1000.0));
}

899 900
static void update_completed_queue_rc(nw_state * s, tw_bf * bf, nw_message * m, tw_lp * lp)
{
901
   
902 903 904
    if(bf->c0)
    {
       struct qlist_head * ent = qlist_pop_back(&s->completed_reqs);
905 906 907 908 909 910 911

        completed_requests * req = qlist_entry(ent, completed_requests, ql);
      /*if(lp->gid == TRACK)
      {
          printf("\n After popping %ld ", req->req_id);
        print_completed_queue(&s->completed_reqs);
      }*/
912 913 914 915
       free(req);
    }
    else if(bf->c1)
    {
916
       struct pending_waits* wait_elem = rc_stack_pop(s->processed_ops); 
917
       s->wait_op = wait_elem;
918 919
       s->wait_time = m->rc.saved_wait_time;
       add_completed_reqs(s, lp, m->fwd.num_matched);
920 921
       codes_issue_next_event_rc(lp); 
    }
922 923
    if(m->fwd.wait_completed > 0)
           s->wait_op->num_completed--;
924 925 926 927 928 929 930 931 932 933
}

static void update_completed_queue(nw_state* s, 
        tw_bf * bf,
        nw_message * m,
        tw_lp * lp,
        dumpi_req_id req_id)
{
    bf->c0 = 0;
    bf->c1 = 0;
934
    m->fwd.num_matched = 0; 
935

936 937
    int waiting = 0;
    waiting = notify_posted_wait(s, bf, m, lp, req_id);
938 939 940 941 942 943 944
 
    if(!waiting)
    {
        bf->c0 = 1;
        completed_requests * req = malloc(sizeof(completed_requests));
        req->req_id = req_id;
        qlist_add_tail(&req->ql, &s->completed_reqs);
945 946 947 948 949 950
       
        /*if(lp->gid == TRACK)
        {
            printf("\n Forward mode adding %ld ", req_id);
            print_completed_queue(&s->completed_reqs);
        }*/
951 952 953 954
    }
    else 
     {
            bf->c1 = 1;
955 956
            m->fwd.num_matched = clear_completed_reqs(s, lp, s->wait_op->req_ids, s->wait_op->count);
            m->rc.saved_wait_time = s->wait_time;
957
            s->wait_time += (tw_now(lp) - s->wait_op->start_time);  
958 959 960

            struct pending_waits* wait_elem = s->wait_op;
            rc_stack_push(lp, wait_elem, free, s->processed_ops);
961 962 963 964 965
            s->wait_op = NULL;
            codes_issue_next_event(lp); 
     }
}

966
/* reverse handler for updating arrival queue function */
967 968 969
static void update_arrival_queue_rc(nw_state* s, 
        tw_bf * bf, 
        nw_message * m, tw_lp * lp)
970
{
971
	s->recv_time = m->rc.saved_recv_time;
972 973
    s->num_bytes_recvd -= m->fwd.num_bytes;

974
    codes_local_latency_reverse(lp);
975
  
976
    if(m->fwd.found_match >= 0)
977
	{
978
        mpi_msgs_queue * qi = rc_stack_pop(s->processed_ops);
979 980
        int queue_count = qlist_count(&s->pending_recvs_queue); 

981
        if(!m->fwd.found_match)
982 983 984
        {
            qlist_add(&qi->ql, &s->pending_recvs_queue);
        }
985
        else if(m->fwd.found_match >= queue_count)
986
        {
987 988
            qlist_add_tail(&qi->ql, &s->pending_recvs_queue);
        }
989
        else if(m->fwd.found_match > 0 && m->fwd.found_match < queue_count)
990 991 992 993 994
        {
            int index = 1;
            struct qlist_head * ent = NULL;
            qlist_for_each(ent, &s->pending_recvs_queue)
            {
995
               if(index == m->fwd.found_match)
996 997