/***********************************************************
* Macros
**********************************************************/
-#define GET_NTUPLES(x) ((int *)(x + sizeof(prefetchqelem_t)))
-#define GET_PTR_OID(x) ((unsigned int *)(x + sizeof(prefetchqelem_t) + sizeof(int)))
-#define GET_PTR_EOFF(x,n) ((short *)(x + sizeof(prefetchqelem_t) + sizeof(int) + (n*sizeof(unsigned int))))
-#define GET_PTR_ARRYFLD(x,n) ((short *)(x + sizeof(prefetchqelem_t) + sizeof(int) + (n*sizeof(unsigned int)) + (n*sizeof(short))))
+#define GET_SITEID(x) ((int *)(x))
+#define GET_NTUPLES(x) ((int *)(x + sizeof(int)))
+#define GET_PTR_OID(x) ((unsigned int *)(x + 2*sizeof(int)))
+#define GET_PTR_EOFF(x,n) ((short *)(x + 2*sizeof(int) + (n*sizeof(unsigned int))))
+#define GET_PTR_ARRYFLD(x,n) ((short *)(x + 2*sizeof(int) + (n*sizeof(unsigned int)) + (n*sizeof(short))))
+#define ENDEBUG(s) { printf("Inside %s()\n", s); fflush(stdout);}
+#define EXDEBUG(s) {printf("Outside %s()\n", s); fflush(stdout);}
/*****************************************
* Coordinator Messages
***************************************/
-#define READ_REQUEST 1
-#define READ_MULT_REQUEST 2
-#define MOVE_REQUEST 3
-#define MOVE_MULT_REQUEST 4
-#define TRANS_REQUEST 5
-#define TRANS_ABORT 6
-#define TRANS_COMMIT 7
-#define TRANS_PREFETCH 8
-#define TRANS_ABORT_BUT_RETRY_COMMIT_WITH_RELOCATING 9
+#define READ_REQUEST 1
+#define READ_MULT_REQUEST 2
+#define MOVE_REQUEST 3
+#define MOVE_MULT_REQUEST 4
+#define TRANS_REQUEST 5
+#define TRANS_ABORT 6
+#define TRANS_COMMIT 7
+#define TRANS_PREFETCH 8
+#define TRANS_ABORT_BUT_RETRY_COMMIT_WITH_RELOCATING 9
/*********************************
* Participant Messages
*******************************/
-#define OBJECT_FOUND 10
-#define OBJECT_NOT_FOUND 11
-#define OBJECTS_FOUND 12
-#define OBJECTS_NOT_FOUND 13
-#define TRANS_AGREE 17
-#define TRANS_DISAGREE 18
-#define TRANS_AGREE_BUT_MISSING_OBJECTS 19
-#define TRANS_SOFT_ABORT 20
-#define TRANS_SUCESSFUL 21
-#define TRANS_PREFETCH_RESPONSE 22
-#define START_REMOTE_THREAD 23
-#define THREAD_NOTIFY_REQUEST 24
-#define THREAD_NOTIFY_RESPONSE 25
-#define TRANS_UNSUCESSFUL 26
-#define CLOSE_CONNECTION 27
-
-//Max number of objects
+#define OBJECT_FOUND 10
+#define OBJECT_NOT_FOUND 11
+#define OBJECTS_FOUND 12
+#define OBJECTS_NOT_FOUND 13
+#define TRANS_AGREE 17
+#define TRANS_DISAGREE 18
+#define TRANS_AGREE_BUT_MISSING_OBJECTS 19
+#define TRANS_SOFT_ABORT 20
+#define TRANS_SUCESSFUL 21
+#define TRANS_PREFETCH_RESPONSE 22
+#define START_REMOTE_THREAD 23
+#define THREAD_NOTIFY_REQUEST 24
+#define THREAD_NOTIFY_RESPONSE 25
+#define TRANS_UNSUCESSFUL 26
+#define CLOSE_CONNECTION 27
+
+//Max number of objects
#define MAX_OBJECTS 20
-//Max remote-machine connections
-#define NUM_MACHINES 2
-#define LOADFACTOR 0.5
#define DEFAULT_OBJ_STORE_SIZE 1048510 //1MB
//Transaction id per machine
#define TID_LEN 20
#define LISTEN_PORT 2156
-
+#define UDP_PORT 2158
+//Prefetch tuning paramters
+#define RETRYINTERVAL 20 //N
+#define SHUTDOWNINTERVAL 3 //M
#include <stdlib.h>
#include <stdio.h>
#include "queue.h"
#include "mcpileq.h"
#include "threadnotify.h"
+#include <arpa/inet.h>
#include <sys/types.h>
#include <sys/socket.h>
+#include <sys/ioctl.h>
+#include <sys/time.h>
#include <netdb.h>
#include <netinet/in.h>
#include <sys/types.h>
#include <errno.h>
#include <time.h>
#include "sockpool.h"
+#include <signal.h>
+#include "plookup.h"
+#include "dsmdebug.h"
//bit designations for status field of objheader
#define DIRTY 0x01
#define LOCK 0x04
#define LOCAL 0x08
+/*******Global statistics *********/
+extern int numprefetchsites;
+
#ifdef COMPILER
#include "structdefs.h"
typedef struct objheader {
- threadlist_t *notifylist;
- unsigned short version;
- unsigned short rcount;
+ threadlist_t *notifylist;
+ unsigned short version;
+ unsigned short rcount;
} objheader_t;
-#define OID(x)\
- (*((unsigned int *)&((struct ___Object___ *)((unsigned int) x + sizeof(objheader_t)))->___nextobject___))
+#define OID(x) \
+ (*((unsigned int *)&((struct ___Object___ *)((unsigned int) x + sizeof(objheader_t)))->___nextobject___))
+
+#define COMPOID(x) \
+ ((void*)(((void *) x )!=NULL)?(*((unsigned int *)&((struct ___Object___ *) x)->___nextobject___))):0
-#define COMPOID(x)\
- (*((unsigned int *)&((struct ___Object___ *) x)->___nextobject___))
+#define STATUS(x) \
+ *((unsigned int *) &(((struct ___Object___ *)((unsigned int) x + sizeof(objheader_t)))->___localcopy___))
-#define STATUS(x)\
- *((unsigned int *) &(((struct ___Object___ *)((unsigned int) x + sizeof(objheader_t)))->___localcopy___))
+#define STATUSPTR(x) \
+ ((unsigned int *) &(((struct ___Object___ *)((unsigned int) x + sizeof(objheader_t)))->___localcopy___))
-#define TYPE(x)\
- ((struct ___Object___ *)((unsigned int) x + sizeof(objheader_t)))->type
+#define TYPE(x) \
+ ((struct ___Object___ *)((unsigned int) x + sizeof(objheader_t)))->type
-#define GETSIZE(size, x) {\
- int type=TYPE(x);\
- if (type<NUMCLASSES) {\
- size=classsize[type];\
- } else {\
- size=classsize[type]*((struct ArrayObject *)&((objheader_t *)x)[1])->___length___+sizeof(struct ArrayObject);\
- }\
+#define GETSIZE(size, x) { \
+ int type=TYPE(x); \
+ if (type<NUMCLASSES) { \
+ size=classsize[type]; \
+ } else { \
+ size=classsize[type]*((struct ArrayObject *)&((objheader_t *)x)[1])->___length___+sizeof(struct ArrayObject); \
+ } \
}
#else
typedef struct objheader {
- threadlist_t *notifylist;
- unsigned int oid;
- unsigned short type;
- unsigned short version;
- unsigned short rcount;
- char status;
+ threadlist_t *notifylist;
+ unsigned int oid;
+ unsigned short type;
+ unsigned short version;
+ unsigned short rcount;
+ char status;
} objheader_t;
#define OID(x) x->oid
#define TYPE(x) x->type
#define STATUS(x) x->status
+#define STATUSPTR(x) &x->status
#define GETSIZE(size, x) size=classsize[TYPE(x)]
#endif
-
typedef struct objstr {
- unsigned int size; //this many bytes are allocated after this header
- void *top;
- struct objstr *next;
+ unsigned int size; //this many bytes are allocated after this header
+ void *top;
+ struct objstr *next;
} objstr_t;
typedef struct oidmidpair {
- unsigned int oid;
- unsigned int mid;
+ unsigned int oid;
+ unsigned int mid;
} oidmidpair_t;
typedef struct transrecord {
// Structure that holds fixed data to be sent along with TRANS_REQUEST
typedef struct fixed_data {
- char control; /* control message */
- char trans_id[TID_LEN]; /* transaction id */
- int mcount; /* participant count */
- short numread; /* no of objects read */
- short nummod; /* no of objects modified */
- short numcreated; /* no of objects created */
- int sum_bytes; /* total bytes of modified objects in a transaction */
+ char control; /* control message */
+ char trans_id[TID_LEN]; /* transaction id */
+ int mcount; /* participant count */
+ unsigned int numread; /* no of objects read */
+ unsigned int nummod; /* no of objects modified */
+ unsigned int numcreated; /* no of objects created */
+ int sum_bytes; /* total bytes of modified objects in a transaction */
} fixed_data_t;
/* Structure that holds trans request information for each participant */
typedef struct trans_req_data {
- fixed_data_t f; /* Holds first few fixed bytes of data sent during TRANS_REQUEST protcol*/
- unsigned int *listmid; /* Pointer to array holding list of participants */
- char *objread; /* Pointer to array holding oid and version number of objects that are only read */
- unsigned int *oidmod; /* Pointer to array holding oids of objects that are modified */
- unsigned int *oidcreated; /* Pointer to array holding oids of objects that are newly created */
-} trans_req_data_t;
+ fixed_data_t f; /* Holds first few fixed bytes of data sent during TRANS_REQUEST protcol*/
+ unsigned int *listmid; /* Pointer to array holding list of participants */
+ char *objread; /* Pointer to array holding oid and version number of objects that are only read */
+ unsigned int *oidmod; /* Pointer to array holding oids of objects that are modified */
+ unsigned int *oidcreated; /* Pointer to array holding oids of objects that are newly created */
+} trans_req_data_t;
/* Structure that holds information of objects that are not found in the participant
* and objs locked within a transaction during commit process */
-typedef struct trans_commit_data{
- unsigned int *objlocked; /* Pointer to array holding oids of objects locked inside a transaction */
+typedef struct trans_commit_data {
+ unsigned int *objlocked; /* Pointer to array holding oids of objects locked inside a transaction */
unsigned int *objnotfound; /* Pointer to array holding oids of objects not found on the participant machine */
- void *modptr; /* Pointer to the address in the mainobject store of the participant that holds all modified objects */
- int numlocked; /* no of objects locked */
- int numnotfound; /* no of objects not found */
+ unsigned int *objvernotmatch; /* Pointer to array holding oids whose version doesn't match on the participant machine */
+ void *modptr; /* Pointer to the address in the mainobject store of the participant that holds all modified objects */
+ int numlocked; /* no of objects locked */
+ int numnotfound; /* no of objects not found */
+ int numvernotmatch; /* no of objects whose version doesn't match */
} trans_commit_data_t;
/* Structure for passing multiple arguments to a thread
* spawned to process each transaction on a machine */
typedef struct thread_data_array {
- int thread_id;
- int mid;
- trans_req_data_t *buffer; /* Holds trans request information sent to participants */
- thread_response_t *recvmsg; /* Shared datastructure to keep track of the participants response to a trans request */
+ int thread_id;
+ int mid;
+ trans_req_data_t *buffer; /* Holds trans request information sent to a participant, based on threadid */
+ thread_response_t *recvmsg; /* Shared datastructure to keep track of the participants response to a trans request */
pthread_cond_t *threshold; /* Condition var to waking up a thread */
- pthread_mutex_t *lock; /* Lock for counting participants response */
- int *count; /* Variable to count responses from all participants to the TRANS_REQUEST protocol */
- char *replyctrl; /* Shared ctrl message that stores the reply to be sent to participants, filled by decideResponse() */
- char *replyretry; /* Shared variable that keep track if coordinator needs retry */
- transrecord_t *rec; /* To send modified objects */
+ pthread_mutex_t *lock; /* Lock for counting participants response */
+ int *count; /* Variable to count responses from all participants to the TRANS_REQUEST protocol */
+ char *replyctrl; /* Shared ctrl message that stores the reply to be sent to participants, filled by decideResponse() */
+ char *replyretry; /* Shared variable that keep track if coordinator needs retry */
+ transrecord_t *rec; /* Shared variable transaction record send to all thread data */
} thread_data_array_t;
//Structure for passing arguments to the local m/c thread
typedef struct local_thread_data_array {
- thread_data_array_t *tdata; /* Holds all the arguments send to a thread that is spawned when transaction commits */
- trans_commit_data_t *transinfo; /* Holds information of objects locked and not found in the participant */
+ thread_data_array_t *tdata; /* Holds all the arguments send to a thread that is spawned when transaction commits */
+ trans_commit_data_t *transinfo; /* Holds information of objects locked and not found in the participant */
} local_thread_data_array_t;
//Structure to store mid and socketid information
typedef struct midSocketInfo {
- unsigned int mid; /* To communicate with mid use sockid in this data structure*/
- int sockid;
+ unsigned int mid; /* To communicate with mid use sockid in this data structure */
+ int sockid;
} midSocketInfo_t;
/* Initialize main object store and lookup tables, start server thread. */
objstr_t *objstrCreate(unsigned int size); //size in bytes
void objstrDelete(objstr_t *store); //traverse and free entire list
void *objstrAlloc(objstr_t *store, unsigned int size); //size in bytes
+void clearObjStore(); // TODO:currently only clears the prefetch cache object store
/* end object store */
/* Prototypes for server portion */
-void *dstmListen();
+void *dstmListen(void *);
+int startlistening();
void *dstmAccept(void *);
int readClientReq(trans_commit_data_t *, int);
int processClientReq(fixed_data_t *, trans_commit_data_t *,unsigned int *, char *, void *, unsigned int *, int);
objheader_t *transRead(transrecord_t *, unsigned int);
objheader_t *transCreateObj(transrecord_t *, unsigned int); //returns oid header
int transCommit(transrecord_t *record); //return 0 if successful
-void *transRequest(void *); //the C routine that the thread will execute when TRANS_REQUEST begins
-void decideResponse(thread_data_array_t *);// Coordinator decides what response to send to the participant
+void *transRequest(void *); //the C routine that the thread will execute when TRANS_REQUEST begins
+void decideResponse(thread_data_array_t *); // Coordinator decides what response to send to the participant
char sendResponse(thread_data_array_t *, int); //Sends control message back to Participants
-void *getRemoteObj(transrecord_t *, unsigned int, unsigned int);// returns object header from main object store after object is copied into it from remote machine
-void *handleLocalReq(void *);//handles Local requests
+void *getRemoteObj(transrecord_t *, unsigned int, unsigned int); // returns object header from main object store after object is copied into it from remote machine
+void *handleLocalReq(void *); //handles Local requests
int transComProcess(local_thread_data_array_t *);
int transAbortProcess(local_thread_data_array_t *);
void transAbort(transrecord_t *trans);
-
-void prefetch(int, unsigned int *, unsigned short *, short*);
+void sendPrefetchResponse(int sd, char *control, char *sendbuffer, int *size);
+void prefetch(int, int, unsigned int *, unsigned short *, short*);
void *transPrefetch(void *);
void *mcqProcess(void *);
-void checkPrefetchTuples(prefetchqelem_t *);
-prefetchpile_t *foundLocal(prefetchqelem_t *);// returns node with prefetch elements(oids, offsets)
-prefetchpile_t *makePreGroups(prefetchqelem_t *, int *);// returns node with prefetch elements(oids, offsets)
-void checkPreCache(prefetchqelem_t *, int *, unsigned int, int);
+prefetchpile_t *foundLocal(char *); // returns node with prefetch elements(oids, offsets)
+int lookupObject(unsigned int * oid, short offset);
int transPrefetchProcess(transrecord_t *, int **, short);
void sendPrefetchReq(prefetchpile_t*, int);
+void sendPrefetchReqnew(prefetchpile_t*, int);
int getPrefetchResponse(int);
unsigned short getObjType(unsigned int oid);
int startRemoteThread(unsigned int oid, unsigned int mid);
+plistnode_t *pInsert(plistnode_t *pile, objheader_t *headeraddr, unsigned int mid, int num_objs);
+
/* Sends notification request for thread join, if sucessful returns 0 else returns -1 */
int reqNotify(unsigned int *oidarry, unsigned short *versionarry, unsigned int numoid);
void threadNotify(unsigned int oid, unsigned short version, unsigned int tid);
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