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%****************************************************************************
%
\section[Sysman.lc]{GUM Sysman Program}
%
% (c) The Parade/AQUA Projects, Glasgow University, 1994-1995.
% P. Trinder, November 30th. 1994.
%
%****************************************************************************
The Sysman task controls initiation, termination, global GC
synchronisation and statistics gathering. Based on K. Hammond's SysMan.lc
in Graph for PVM.
\begin{code}
#define NON_POSIX_SOURCE /* so says Solaris */
#include "rtsdefs.h"
#include "LLC.h"
\end{code}
\begin{code}
static GLOBAL_TASK_ID gtids[MAX_PES], IOTask = 0, StatsTask = 0;
static long PEbuffer[MAX_PES];
static int nPEs = 0;
\end{code}
\begin{code}
static GLOBAL_TASK_ID sysman_id, sender_id;
GLOBAL_TASK_ID mytid;
static unsigned PEsTerminated = 0;
static rtsBool Finishing = rtsFalse;
\end{code}
\begin{code}
#define checkerr(c) do {if((c)<0) { pvm_perror("Sysman"); EXIT(EXIT_FAILURE); }} while(0)
\end{code}
This Function not yet implemented for GUM
\begin{code}
static void
DoGlobalGC(STG_NO_ARGS)
{}
/*
static void
HandleException(STG_NO_ARGS)
{}
*/
\end{code}
\begin{code}
main(argc, argv)
int argc;
char **argv;
{
int rbufid;
int opcode, nbytes;
char **pargv;
int i;
#if 0
int status;
#endif
int spawn_flag = PvmTaskDefault;
char *petask;
setbuf(stdout, NULL);
setbuf(stderr, NULL);
if (argc > 1) {
if (*argv[1] == '-') {
spawn_flag = PvmTaskDebug;
argv[1] = argv[0];
argv++; argc--;
}
sysman_id = pvm_mytid();/* This must be the first PVM call */
checkerr(sysman_id);
nPEs = atoi(argv[1]);
if ((petask = getenv(PETASK)) == NULL)
petask = PETASK;
#if 1
fprintf(stderr, "nPEs (%s) = %d\n", petask, nPEs);
#endif
/* Check that we can create the number of PE and IMU tasks requested */
if (nPEs > MAX_PES) {
fprintf(stderr, "No more than %d PEs allowed (%d requested)\n", MAX_PES, nPEs);
EXIT(EXIT_FAILURE);
}
/* Create the PE Tasks */
if (nPEs > 0) {
/* Initialise the PE task arguments from Sysman's arguments */
pargv = argv + 1;
#if 0
fprintf(stderr, "Spawning %d PEs(%s) ...\n", nPEs, petask);
fprintf(stderr, " args: ");
for (i = 0; pargv[i]; ++i)
fprintf(stderr, "%s, ", pargv[i]);
fprintf(stderr, "\n");
#endif
checkerr(pvm_spawn(petask, pargv, spawn_flag, "", nPEs, gtids));
for (i = 0; i < nPEs; i++)
PEbuffer[i] = (long) gtids[i];
#if 0
fprintf(stderr, "Spawned /* PWT */\n");
#endif
}
/* Join the PE sysman groups in order to allow barrier synchronisation */
checkerr(pvm_joingroup(PECTLGROUP));
#if 0
fprintf(stderr, "Joined PECTLGROUP /* PWT */\n");
#endif
/* Wait for all the PEs and IMUs to arrive */
checkerr(pvm_barrier(PECTLGROUP, nPEs + 1));
#if 0
fprintf(stderr, "PECTLGROUP barrier passed /* HWL */\n");
#endif
/* Broadcast Global Task Ids of all PEs */
pvm_initsend(PvmDataDefault);
PutArgs(PEbuffer, nPEs);
pvm_bcast(PEGROUP, PP_PETIDS);
#if 0
/* Find an IO task */
for (i = 0; IOTask <= 0 || status != PvmOk; ++i) {
IOTask = pvm_gettid(PEGROUP, i);
status = pvm_pstat(IOTask);
fprintf(stderr, "Task %x, Status %x\n", IOTask, status);
}
#endif
IOTask = gtids[0];
#if 0
fprintf(stderr, "IO Task is [t%x]\n", IOTask);
#endif
pvm_initsend(PvmDataDefault);
pvm_send(IOTask, PP_IO_INIT);
pvm_initsend(PvmDataDefault);
pvm_bcast(PEGROUP, PP_INIT);
#if 0
fprintf(stderr, "Broadcast PP_INIT to all PEs\n");
#endif
/* HWL-DEBUG */
#if 0
fprintf(stderr, "Sysman successfully initialized!\n");
#endif
/* Process incoming messages */
while (1) {
if ((rbufid = pvm_recv(ANY_TASK, ANY_OPCODE)) < 0)
pvm_perror("Sysman: Receiving Message");
else {
pvm_bufinfo(rbufid, &nbytes, &opcode, &sender_id);
#if 0
fprintf(stderr, "HWL-DBG(SysMan; main loop): rbufid=%x, nbytes = %d, opcode = %x, sender_id = %x\n",
rbufid, nbytes, opcode, sender_id);
#endif
switch (opcode) {
case PP_GC_INIT:
/* This Function not yet implemented for GUM */
fprintf(stderr, "Global GC from %x Not yet implemented for GUM!\n", sender_id);
sync(PECTLGROUP, PP_FULL_SYSTEM);
broadcast(PEGROUP, PP_GC_INIT);
DoGlobalGC();
broadcast(PEGROUP, PP_INIT);
break;
case PP_STATS_ON:
case PP_STATS_OFF:
/* This Function not yet implemented for GUM */
break;
case PP_FINISH:
fprintf(stderr, "Finish from %x\n", sender_id);
if (!Finishing) {
long buf = (long) StatsTask;
Finishing = rtsTrue;
pvm_initsend(PvmDataDefault);
pvm_pklong(&buf, 1, 1);
pvm_bcast(PEGROUP, PP_FINISH);
} else {
++PEsTerminated;
}
if (PEsTerminated >= nPEs) {
broadcast(PEGROUP, PP_FINISH);
broadcast(MGRGROUP, PP_FINISH);
pvm_lvgroup(PEGROUP);
pvm_lvgroup(PECTLGROUP);
pvm_lvgroup(MGRGROUP);
pvm_exit();
EXIT(EXIT_SUCCESS);
}
break;
case PP_FAIL:
fprintf(stderr, "Fail from %x\n", sender_id);
if (!Finishing) {
Finishing = rtsTrue;
broadcast(PEGROUP, PP_FAIL);
}
break;
default:
{
/* char *opname = GetOpName(opcode);
fprintf(stderr,"Sysman: Unrecognised opcode %s (%x)\n",
opname,opcode); */
fprintf(stderr, "Sysman: Unrecognised opcode (%x)\n",
opcode);
}
break;
}
}
}
}
}
\end{code}
@myexit@ for the system manager.
\begin{code}
void
myexit(n)
I_ n;
{
#ifdef exit
#undef exit
#endif
exit(n);
}
\end{code}
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