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/* $Source: bitbucket.org:berkeleylab/gasnet.git/tests/testcontend.c $
*
* Description: GASNet threaded contention tester.
* The test initializes GASNet and forks off up to 256 threads.
* The test measures the level of inter-thread contention for local
* network resources with various different usage patterns.
*
* Copyright 2004, Dan Bonachea <bonachea@cs.berkeley.edu>
* Terms of use are as specified in license.txt
*/
#include "test.h"
#ifndef GASNET_PAR
#error This test can only be built for GASNet PAR configuration
#endif
static gex_Client_t myclient;
static gex_EP_t myep;
static gex_TM_t myteam;
static gex_Segment_t mysegment;
static gex_Rank_t myrank;
static gex_Rank_t numranks;
typedef struct {
int activecnt;
int passivecnt;
} threadcnt_t;
typedef gex_AM_Arg_t harg_t;
/* configurable parameters */
#define DEFAULT_ITERS 50
int iters = DEFAULT_ITERS;
int amactive;
int peer = -1;
char *peerseg = NULL;
int threads;
struct {
char pad0[GASNETT_CACHE_LINE_BYTES];
gasnett_atomic_t _pong;
char pad1[GASNETT_CACHE_LINE_BYTES - sizeof(gasnett_atomic_t)];
volatile int _signal_done;
char pad2[GASNETT_CACHE_LINE_BYTES - sizeof(int)];
} globals = {{0}, gasnett_atomic_init(0), {0}, 0, {0}};
#define pong globals._pong
#define signal_done globals._signal_done
#define thread_barrier() PTHREAD_BARRIER(threads)
int revthreads = 0;
#define ARG2THREAD(arg) (revthreads?(threads-1)-(int)(intptr_t)args:(int)(intptr_t)args)
typedef void * (*threadmain_t)(void *args);
/* AM Handlers */
void ping_shorthandler(gex_Token_t token);
void pong_shorthandler(gex_Token_t token);
void markdone_shorthandler(gex_Token_t token);
#define hidx_ping_shorthandler 201
#define hidx_pong_shorthandler 202
#define hidx_markdone_shorthandler 203
gex_AM_Entry_t htable[] = {
{ hidx_ping_shorthandler, (gex_AM_Fn_t)ping_shorthandler, GEX_FLAG_AM_REQUEST|GEX_FLAG_AM_SHORT, 0 },
{ hidx_pong_shorthandler, (gex_AM_Fn_t)pong_shorthandler, GEX_FLAG_AM_REPLY|GEX_FLAG_AM_SHORT, 0 },
{ hidx_markdone_shorthandler, (gex_AM_Fn_t)markdone_shorthandler, GEX_FLAG_AM_REQUEST|GEX_FLAG_AM_SHORT, 0 },
};
#define HANDLER_TABLE_SIZE (sizeof(htable)/sizeof(gex_AM_Entry_t))
#define SPINPOLL_UNTIL(cond) do { while (!(cond)) gasnet_AMPoll(); } while (0)
#define BARRIER_UNTIL(cond) do { \
if (mythread == 0) SPINPOLL_UNTIL(cond); \
else if (mythread == 1) { \
/* one thread sits in barrier during test */ \
gasnet_barrier_notify(0,GASNET_BARRIERFLAG_ANONYMOUS); \
GASNET_Safe(gasnet_barrier_wait(0,GASNET_BARRIERFLAG_ANONYMOUS)); \
} \
} while (0)
int _havereport = 0;
char _reportstr[644];
static gasnett_atomic_t pgcounter = gasnett_atomic_init(0);
const char *getreport(void) {
if (_havereport) {
_havereport = 0;
return _reportstr;
} else return NULL;
}
void report(gasnett_tick_t ticks) {
double timeus = (double)gasnett_ticks_to_ns(ticks)/1000;
char pgcount[32] = {0};
gasnett_atomic_val_t count = gasnett_atomic_swap(&pgcounter,0,0);
if (count && (timeus > 0.)) snprintf(pgcount, sizeof(pgcount), "%12lu ops/s", (unsigned long)(count/(timeus*1e-6)));
snprintf(_reportstr, sizeof(_reportstr),
"%7.3f us\t%5.3f sec%s",
timeus/iters, timeus/1000000, pgcount);
_havereport = 1;
}
/* testing functions */
#define AMPINGPONG(fnname, POLLUNTIL) \
void * fnname(void *args) { \
int mythread = ARG2THREAD(args); \
static int nonzero_present = 0; \
gasnett_tick_t start, end; \
signal_done = 0; \
if (mythread != 0) nonzero_present = 1; \
thread_barrier(); \
if (mythread == 0) { \
int i; \
gasnett_atomic_set(&pong,0,0); \
start = gasnett_ticks_now(); \
for (i = 0; i < iters; i++) { \
gex_AM_RequestShort0(myteam, peer, hidx_ping_shorthandler, 0); \
POLLUNTIL(gasnett_atomic_read(&pong,0) > i); \
} \
end = gasnett_ticks_now(); \
gex_AM_RequestShort0(myteam, peer, hidx_markdone_shorthandler, 0); \
gex_AM_RequestShort0(myteam, myrank, hidx_markdone_shorthandler, 0); \
if (!nonzero_present) { \
mythread = 1; /* ensure it runs once, impersonating thread1 */ \
POLLUNTIL(signal_done); \
mythread = 0; \
} \
} else { \
POLLUNTIL(signal_done); \
} \
thread_barrier(); \
nonzero_present = 0; \
if (mythread == 0 && amactive) report(end-start); \
return NULL; \
}
AMPINGPONG(ampingpong_poll_active, SPINPOLL_UNTIL)
AMPINGPONG(ampingpong_block_active, GASNET_BLOCKUNTIL)
AMPINGPONG(ampingpong_barrier_active, BARRIER_UNTIL)
#define PUTGETPINGPONG(fnname, POLLUNTIL, putgetstmt) \
void * fnname(void *args) { \
struct { \
char pad0[GASNETT_CACHE_LINE_BYTES]; \
int64_t datum; \
char pad1[GASNETT_CACHE_LINE_BYTES-sizeof(int64_t)]; \
} locals = {{0}, 0, {0}}; \
int mythread = ARG2THREAD(args); \
static int nonzero_present = 0; \
gasnett_tick_t start, end; \
signal_done = 0; \
if (mythread != 0) nonzero_present = 1; \
thread_barrier(); \
if (mythread == 0) { \
int i; \
gasnett_atomic_set(&pong,0,0); \
start = gasnett_ticks_now(); \
for (i = 0; i < iters; i++) { \
putgetstmt; \
} \
end = gasnett_ticks_now(); \
gex_AM_RequestShort0(myteam, peer, hidx_markdone_shorthandler, 0); \
gex_AM_RequestShort0(myteam, myrank, hidx_markdone_shorthandler, 0); \
if (!nonzero_present) { \
mythread = 1; /* ensure it runs once, impersonating thread1 */ \
POLLUNTIL(signal_done); \
mythread = 0; \
} \
} else { \
POLLUNTIL(signal_done); \
} \
thread_barrier(); \
nonzero_present = 0; \
if (mythread == 0 && amactive) report(end-start); \
return NULL; \
}
PUTGETPINGPONG(put_poll_active, SPINPOLL_UNTIL, gex_RMA_PutBlocking(myteam, peer, peerseg, &locals.datum, 8, 0))
PUTGETPINGPONG(get_poll_active, SPINPOLL_UNTIL, gex_RMA_GetBlocking(myteam, &locals.datum, peer, peerseg, 8, 0))
PUTGETPINGPONG(put_block_active, GASNET_BLOCKUNTIL, gex_RMA_PutBlocking(myteam, peer, peerseg, &locals.datum, 8, 0))
PUTGETPINGPONG(get_block_active, GASNET_BLOCKUNTIL, gex_RMA_GetBlocking(myteam, &locals.datum, peer, peerseg, 8, 0))
PUTGETPINGPONG(put_barrier_active, BARRIER_UNTIL, gex_RMA_PutBlocking(myteam, peer, peerseg, &locals.datum, 8, 0))
PUTGETPINGPONG(get_barrier_active, BARRIER_UNTIL, gex_RMA_GetBlocking(myteam, &locals.datum, peer, peerseg, 8, 0))
#define PGFIGHT(fnname, putgetstmt_loner, putgetstmt_rest) \
void * fnname(void *args) { \
struct { \
char pad0[GASNETT_CACHE_LINE_BYTES]; \
int64_t datum; \
char pad1[GASNETT_CACHE_LINE_BYTES-sizeof(int64_t)]; \
} locals = {{0}, 0, {0}}; \
int mythread = ARG2THREAD(args); \
gasnett_tick_t start, end; \
signal_done = 0; \
if (mythread == 0) gasnett_atomic_set(&pgcounter,0,0); \
thread_barrier(); \
if (mythread == 0) { \
int i; \
start = gasnett_ticks_now(); \
for (i = 0; i < iters; i++) { \
putgetstmt_loner; \
} \
end = gasnett_ticks_now(); \
gex_AM_RequestShort0(myteam, peer, hidx_markdone_shorthandler, 0); \
gex_AM_RequestShort0(myteam, myrank, hidx_markdone_shorthandler, 0); \
gasnett_atomic_add(&pgcounter,iters,0); \
} else { \
gasnett_atomic_val_t count = 0; \
while(!signal_done) { \
putgetstmt_rest; \
count++; \
} \
gasnett_atomic_add(&pgcounter,count,0); \
} \
thread_barrier(); \
if (mythread == 0 && amactive) report(end-start); \
return NULL; \
} \
PGFIGHT(put_put_active, gex_RMA_PutBlocking(myteam, peer, peerseg, &locals.datum, 8, 0), gex_RMA_PutBlocking(myteam, peer, peerseg, &locals.datum, 8, 0))
PGFIGHT(put_get_active, gex_RMA_PutBlocking(myteam, peer, peerseg, &locals.datum, 8, 0), gex_RMA_GetBlocking(myteam, &locals.datum, peer, peerseg, 8, 0))
PGFIGHT(get_put_active, gex_RMA_GetBlocking(myteam, &locals.datum, peer, peerseg, 8, 0), gex_RMA_PutBlocking(myteam, peer, peerseg, &locals.datum, 8, 0))
PGFIGHT(get_get_active, gex_RMA_GetBlocking(myteam, &locals.datum, peer, peerseg, 8, 0), gex_RMA_GetBlocking(myteam, &locals.datum, peer, peerseg, 8, 0))
void * poll_passive(void *args) {
int mythread = ARG2THREAD(args);
signal_done = 0;
thread_barrier();
while (!signal_done) gasnet_AMPoll();
thread_barrier();
return NULL;
}
void * block_passive(void *args) {
int mythread = ARG2THREAD(args);
signal_done = 0;
thread_barrier();
GASNET_BLOCKUNTIL(signal_done);
thread_barrier();
return NULL;
}
void * barrier_passive(void *args) {
int mythread = ARG2THREAD(args);
signal_done = 0;
thread_barrier();
while (!signal_done) gasnet_AMPoll();
if (mythread == 0) { /* match the barrier the active side is waiting for */
gasnet_barrier_notify(0,GASNET_BARRIERFLAG_ANONYMOUS);
GASNET_Safe(gasnet_barrier_wait(0,GASNET_BARRIERFLAG_ANONYMOUS));
}
thread_barrier();
return NULL;
}
typedef struct {
const char *desc;
threadmain_t activefunc;
threadmain_t passivefunc;
} fntable_t;
fntable_t fntable[] = {
{ "AM Ping-pong vs. spin-AMPoll()", ampingpong_poll_active, poll_passive },
{ "AM Ping-pong vs. BLOCKUNTIL", ampingpong_block_active, block_passive },
{ "gex_RMA_PutBlocking vs. spin-AMPoll()", put_poll_active, poll_passive },
{ "gex_RMA_PutBlocking vs. BLOCKUNTIL", put_block_active, block_passive },
{ "gex_RMA_GetBlocking vs. spin-AMPoll()", get_poll_active, poll_passive },
{ "gex_RMA_GetBlocking vs. BLOCKUNTIL", get_block_active, block_passive },
{ "gex_RMA_PutBlocking vs. gex_RMA_PutBlocking", put_put_active, poll_passive },
{ "gex_RMA_PutBlocking vs. gex_RMA_GetBlocking", put_get_active, poll_passive },
{ "gex_RMA_GetBlocking vs. gex_RMA_PutBlocking", get_put_active, poll_passive },
{ "gex_RMA_GetBlocking vs. gex_RMA_GetBlocking", get_get_active, poll_passive },
{ "AM Ping-pong vs. local barrier", ampingpong_barrier_active, barrier_passive },
{ "gex_RMA_PutBlocking vs. local barrier", put_barrier_active, barrier_passive },
{ "gex_RMA_GetBlocking vs. local barrier", get_barrier_active, barrier_passive },
};
#define NUM_FUNC (sizeof(fntable)/sizeof(fntable_t))
int tcountentries;
threadcnt_t *tcount;
void *workerthread(void *args) {
int fnidx;
int mythread = ARG2THREAD(args);
for (fnidx = 0; fnidx < NUM_FUNC; fnidx++) {
int tcountpos;
if (mythread == 0) TEST_SECTION_BEGIN();
thread_barrier();
if (!TEST_SECTION_ENABLED()) {
thread_barrier();
continue;
}
if (mythread == 0 && myrank == 0) {
MSG("%c: --------------------------------------------------------------------------",
TEST_SECTION_NAME());
MSG("%c: Running test %s", TEST_SECTION_NAME(), fntable[fnidx].desc);
MSG("%c: --------------------------------------------------------------------------",
TEST_SECTION_NAME());
MSG("%c: Active-end threads\tPassive-end threads\t IterTime\tTotalTime",
TEST_SECTION_NAME());
MSG("%c: --------------------------------------------------------------------------",
TEST_SECTION_NAME());
}
for (tcountpos = 0; tcountpos < tcountentries; tcountpos++) {
threadmain_t mainfn = amactive ? fntable[fnidx].activefunc : fntable[fnidx].passivefunc;
int participating_threads = amactive ? tcount[tcountpos].activecnt : tcount[tcountpos].passivecnt;
thread_barrier();
if (mythread < participating_threads) mainfn(args);
else { /* match barriers */
thread_barrier();
thread_barrier();
}
thread_barrier();
if (mythread == 0 && amactive) {
const char *rpt = getreport();
if (rpt) MSG("%c:\t %d\t\t\t %d\t\t%s", TEST_SECTION_NAME(),
tcount[tcountpos].activecnt, tcount[tcountpos].passivecnt, rpt);
}
}
}
return NULL;
}
int main(int argc, char **argv) {
int maxthreads = 4;
int i;
int arg;
int help = 0;
threadcnt_t *ptcount;
GASNET_Safe(gex_Client_Init(&myclient, &myep, &myteam, "testcontend", &argc, &argv, 0));
GASNET_Safe(gex_Segment_Attach(&mysegment, myteam, TEST_SEGSZ_REQUEST));
GASNET_Safe(gex_EP_RegisterHandlers(myep, htable, HANDLER_TABLE_SIZE));
myrank = gex_TM_QueryRank(myteam);
numranks = gex_TM_QuerySize(myteam);
test_init("testcontend",1,"[options] (maxthreads) (iters) (test_sections)\n"
" The -rev option reverses thread numbering");
arg = 1;
while (argc > arg) {
if (!strcmp(argv[arg], "-rev")) {
revthreads = 1;
++arg;
} else if (argv[arg][0] == '-') {
help = 1;
++arg;
} else break;
}
if (argc > arg) { maxthreads = atoi(argv[arg]); ++arg; }
if (argc > arg) { iters = atoi(argv[arg]); ++arg; }
if (argc > arg) { TEST_SECTION_PARSE(argv[arg]); ++arg; }
if (argc > arg || help) test_usage();
if (maxthreads > TEST_MAXTHREADS || maxthreads < 1) {
printf("Threads must be between 1 and %i\n", TEST_MAXTHREADS);
gasnet_exit(-1);
}
maxthreads = test_thread_limit(maxthreads);
if (numranks % 2 != 0) {
MSG0("WARNING: This test requires an even number of nodes. Test skipped.\n");
gasnet_exit(0); /* exit 0 to prevent false negatives in test harnesses for smp-conduit */
}
if (myrank == 0) {
MSG("Running testcontend with 1..%i threads and %i iterations", maxthreads, iters);
}
tcountentries = 3 * maxthreads;
tcount = test_malloc(tcountentries * sizeof(threadcnt_t));
ptcount = tcount;
for (i = 1; i <= maxthreads; i++) { ptcount->activecnt = i; ptcount->passivecnt = 1; ptcount++; }
for (i = 1; i <= maxthreads; i++) { ptcount->activecnt = 1; ptcount->passivecnt = i; ptcount++; }
for (i = 1; i <= maxthreads; i++) { ptcount->activecnt = i; ptcount->passivecnt = i; ptcount++; }
peer = (myrank + 1) % numranks;
amactive = (myrank % 2 == 0);
peerseg = TEST_SEG(peer);
/* create all worker threads */
threads = maxthreads;
test_createandjoin_pthreads(maxthreads, &workerthread, NULL, 0);
BARRIER();
if (myrank == 0) MSG("Tests complete");
BARRIER();
gasnet_exit(0);
return 0;
}
/****************************************************************/
/* AM Handlers */
void ping_shorthandler(gex_Token_t token) {
gex_AM_ReplyShort0(token, hidx_pong_shorthandler, 0);
}
void pong_shorthandler(gex_Token_t token) {
gasnett_atomic_increment(&pong,0);
}
void markdone_shorthandler(gex_Token_t token) {
signal_done = 1;
}
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