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Commit eaf42812 authored by Dave Wells's avatar Dave Wells Committed by Yoni Fogel
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first working version of recovery stress test. Still incomplete. refs[t:1977] 

git-svn-id: file:///svn/toku/tokudb@14976 c7de825b-a66e-492c-adef-691d508d4ae1
parent c0eac18e
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src/tests/Makefile
View file @ eaf42812
...@@ -102,6 +102,7 @@ BDB_DONTRUN_TESTS = \ ...@@ -102,6 +102,7 @@ BDB_DONTRUN_TESTS = \
checkpoint_stress \ checkpoint_stress \
checkpoint_truncate_1 \ checkpoint_truncate_1 \
checkpoint_callback \ checkpoint_callback \
recovery_stress \
test_txn_nested1 \ test_txn_nested1 \
test_txn_nested2 \ test_txn_nested2 \
test_txn_nested3 \ test_txn_nested3 \
......
src/tests/recovery_stress.c 0 → 100644
View file @ eaf42812
/* -*- mode: C; c-basic-offset: 4 -*- */
#ident "Copyright (c) 2009 Tokutek Inc. All rights reserved."
#ident "$Id$"
#include "test.h"
#include "toku_pthread.h"
#include <db.h>
#include <sys/stat.h>
#include "checkpoint_test.h"
static const u_int64_t max_windows_cachesize = 256 << 20;
static const int NUM_DICTIONARIES = 1;
static const int OPER_STEPS = 6;
typedef enum __recovery_stress_steps
{
PRE_PRE_STEP = 0,
PRE_CP_STEP,
PRE_POST_STEP,
CP_CP_STEP,
CP_POST_STEP,
POST_POST_STEP
} STEP;
//const int OPER_PER_STEP = 331;
const int OPER_PER_STEP = 3;
#define OPER_PER_ITER ( OPER_STEPS * OPER_PER_STEP )
#define DBG(str) if (verbose) printf("%s:%25s: %s\n", __FILE__, __FUNCTION__, str)
#define iDBG(iter) if (verbose) printf("%s:%25s: iter = %d\n", __FILE__, __FUNCTION__, iter)
static int firstkey(int iter, STEP step) { return (iter * OPER_PER_ITER) + (step * OPER_PER_STEP); }
//static toku_pthread_t thread;
static void
drop_dead(void) {
// deliberate zerodivide or sigsegv
#if 0
fprintf(stderr, "HAPPY CRASH\n");
#endif
fflush(stdout);
fflush(stderr);
int zero = 0;
int infinity = 1/zero;
printf("Survived zerodivide!\n");
fflush(stdout);
printf("Infinity = %d\n", infinity);
fflush(stdout);
void * intothevoid = NULL;
(*(int*)intothevoid)++;
printf("intothevoid = %p, infinity = %d\n", intothevoid, infinity);
printf("This line should never be printed\n");
fflush(stdout);
}
static void verify (DICTIONARY dictionaries, int iter) {
int i, key;
DB *db;
// iDBG(iter);
for (i=0;i<NUM_DICTIONARIES;i++) {
db = dictionaries[i].db;
if (iter == 1) {
key = firstkey(iter - 1, 0);
verify_sequential_rows(db, key, OPER_PER_ITER);
}
else if (iter == 2) {
key = firstkey(iter - 2, 0);
verify_sequential_rows(db, key, OPER_PER_ITER * 2);
}
else if (iter == 3) {
key = firstkey(iter - 3, 0);
verify_sequential_rows(db, key, OPER_PER_ITER * 3);
}
else if (iter > 3) {
key = firstkey(iter - 4, 0);
verify_sequential_rows(db, key, OPER_PER_ITER * 4);
}
}
return;
}
struct iteration_spec {
int iter;
STEP step;
DB_TXN *pre_pre_insert_commit;
DB_TXN *pre_cp_insert_commit;
DB_TXN *pre_post_insert_commit;
DB_TXN *cp_cp_insert_commit;
DB_TXN *cp_post_insert_commit;
DB_TXN *post_post_insert_commit;
DB_TXN *pre_pre_insert_abort;
DB_TXN *pre_cp_insert_abort;
DB_TXN *pre_post_insert_abort;
DB_TXN *cp_cp_insert_abort;
DB_TXN *cp_post_insert_abort;
DB_TXN *post_post_insert_abort;
DB_TXN *pre_insert_incmplt;
DB_TXN *cp_insert_incmplt;
DB_TXN *post_insert_incmplt;
DB_TXN *pre_pre_delete_commit;
DB_TXN *pre_cp_delete_commit;
DB_TXN *pre_post_delete_commit;
DB_TXN *cp_cp_delete_commit;
DB_TXN *cp_post_delete_commit;
DB_TXN *post_post_delete_commit;
DB_TXN *pre_pre_delete_abort;
DB_TXN *pre_cp_delete_abort;
DB_TXN *pre_post_delete_abort;
DB_TXN *cp_cp_delete_abort;
DB_TXN *cp_post_delete_abort;
DB_TXN *post_post_delete_abort;
DB_TXN *pre_delete_incmplt;
DB_TXN *cp_delete_incmplt;
DB_TXN *post_delete_incmplt;
};
typedef struct iteration_spec *ITER_SPEC;
static void pre_checkpoint_acts(DICTIONARY dictionaries, ITER_SPEC spec) {
int i;
DB *db;
int iter = spec->iter;
assert(spec->step == PRE_PRE_STEP);
int key;
int r;
// iDBG(iter);
for (i=0;i<NUM_DICTIONARIES;i++) {
db = dictionaries[i].db;
// ---- GOOD INSERTIONS FOR THIS ITERATION ----
// begin pre, commit pre
key = firstkey(iter, PRE_PRE_STEP);
r = env->txn_begin(env, NULL, &spec->pre_pre_insert_commit, 0); CKERR(r);
insert_n_fixed(db, NULL, spec->pre_pre_insert_commit, key, OPER_PER_STEP);
r = spec->pre_pre_insert_commit->commit(spec->pre_pre_insert_commit, 0); CKERR(r);
// begin pre, commit cp, post
key = firstkey(iter, PRE_CP_STEP);
r = env->txn_begin(env, NULL, &spec->pre_cp_insert_commit, 0); CKERR(r);
insert_n_fixed(db, NULL, spec->pre_cp_insert_commit, key, OPER_PER_STEP);
key = firstkey(iter, PRE_POST_STEP);
r = env->txn_begin(env, NULL, &spec->pre_post_insert_commit, 0); CKERR(r);
insert_n_fixed(db, NULL, spec->pre_post_insert_commit, key, OPER_PER_STEP);
// ---- ABORTED INSERTIONS THAT WOULD OVERWRITE PREVIOUS ITERATION ----
if ( iter > 0 ) {
// begin pre, abort pre
key = firstkey(iter - 1, PRE_PRE_STEP);
r = env->txn_begin(env, NULL, &spec->pre_pre_insert_abort, 0); CKERR(r);
insert_n_broken(db, NULL, spec->pre_pre_insert_abort, key, OPER_PER_STEP);
r = spec->pre_pre_insert_abort->abort(spec->pre_pre_insert_abort); CKERR(r);
// begin pre, abort cp, post
key = firstkey(iter - 1, PRE_CP_STEP);
r = env->txn_begin(env, NULL, &spec->pre_cp_insert_abort, 0); CKERR(r);
insert_n_broken(db, NULL, spec->pre_cp_insert_abort, key, OPER_PER_STEP);
key = firstkey(iter - 1, PRE_POST_STEP);
r = env->txn_begin(env, NULL, &spec->pre_post_insert_abort, 0); CKERR(r);
insert_n_broken(db, NULL, spec->pre_post_insert_abort, key, OPER_PER_STEP);
}
// ---- INCOMPLETE INSERTIONS THAT WOULD OVERWRITE I-2 ITERATIONS AGO ----
if ( iter > 1 ) {
// begin pre, incomplete
key = firstkey(iter - 2, PRE_PRE_STEP);
r = env->txn_begin(env, NULL, &spec->pre_insert_incmplt, 0); CKERR(r);
insert_n_broken(db, NULL, spec->pre_insert_incmplt, key, OPER_PER_STEP);
}
// ---- ABORTED DELETES THAT WOULD DELETE I-3 ITERATIONS AGO ----
if ( iter > 2 ) {
// begin pre, abort pre
key = firstkey(iter - 3, PRE_PRE_STEP);
r = env->txn_begin(env, NULL, &spec->pre_pre_delete_abort, 0); CKERR(r);
delete_n(db, NULL, spec->pre_pre_delete_abort, key, OPER_PER_STEP, 0);
r = spec->pre_pre_delete_abort->abort(spec->pre_pre_delete_abort); CKERR(r);
// begin pre, abort cp, post
key = firstkey(iter - 3, PRE_CP_STEP);
r = env->txn_begin(env, NULL, &spec->pre_cp_delete_abort, 0); CKERR(r);
insert_n_broken(db, NULL, spec->pre_cp_delete_abort, key, OPER_PER_STEP);
key = firstkey(iter - 3, PRE_POST_STEP);
r = env->txn_begin(env, NULL, &spec->pre_post_delete_abort, 0); CKERR(r);
insert_n_broken(db, NULL, spec->pre_post_delete_abort, key, OPER_PER_STEP);
}
// ---- INCOMPLETE DELETES THAT WOULD DELETE I-4 ITERATIONS AGO ----
if ( iter > 3 ) {
// begin pre, incomplete
key = firstkey(iter - 4, PRE_PRE_STEP);
r = env->txn_begin(env, NULL, &spec->pre_delete_incmplt, 0); CKERR(r);
delete_n(db, NULL, spec->pre_delete_incmplt, key, OPER_PER_STEP, 0);
}
// ---- GOOD DELETES THAT REMOVE I-5 ITERATIONS AGO ----
if ( iter > 4 ) {
// begin pre, commit pre
key = firstkey(iter - 5, PRE_PRE_STEP);
r = env->txn_begin(env, NULL, &spec->pre_pre_delete_commit, 0); CKERR(r);
delete_n(db, NULL, spec->pre_pre_delete_commit, key, OPER_PER_STEP, 0);
r = spec->pre_pre_delete_commit->commit(spec->pre_pre_delete_commit, 0); CKERR(r);
// begin pre, commit cp, post
key = firstkey(iter - 5, PRE_CP_STEP);
r = env->txn_begin(env, NULL, &spec->pre_cp_delete_commit, 0); CKERR(r);
delete_n(db, NULL, spec->pre_cp_delete_commit, key, OPER_PER_STEP, 0);
key = firstkey(iter - 5, PRE_POST_STEP);
r = env->txn_begin(env, NULL, &spec->pre_post_delete_commit, 0); CKERR(r);
delete_n(db, NULL, spec->pre_post_delete_commit, key, OPER_PER_STEP, 0);
}
}
return;
}
static void checkpoint_acts(DICTIONARY dictionaries, ITER_SPEC spec) {
int i, r, key;
DB *db;
int iter = spec->iter;
assert(spec->step == CP_CP_STEP);
// iDBG(iter);
for (i=0;i<NUM_DICTIONARIES;i++) {
db = dictionaries[i].db;
// ---- GOOD INSERTIONS FOR THIS ITERATION ----
// begin pre, commit cp
r = spec->pre_cp_insert_commit->commit(spec->pre_cp_insert_commit, 0); CKERR(r);
// begin cp, commit cp
key = firstkey(iter, CP_CP_STEP);
r = env->txn_begin(env, NULL, &spec->cp_cp_insert_commit, 0); CKERR(r);
insert_n_fixed(db, NULL, spec->cp_cp_insert_commit, key, OPER_PER_STEP);
r = spec->cp_cp_insert_commit->commit(spec->cp_cp_insert_commit, 0); CKERR(r);
// begin cp, commit post
key = firstkey(iter, CP_POST_STEP);
r = env->txn_begin(env, NULL, &spec->cp_post_insert_commit, 0); CKERR(r);
insert_n_fixed(db, NULL, spec->cp_post_insert_commit, key, OPER_PER_STEP);
// ---- ABORTED INSERTIONS THAT WOULD OVERWRITE PREVIOUS ITERATION ----
if ( iter > 0 ) {
// begin pre, abort cp
r = spec->pre_cp_insert_abort->abort(spec->pre_cp_insert_abort); CKERR(r);
// begin cp, abort cp
key = firstkey(iter - 1, CP_CP_STEP);
r = env->txn_begin(env, NULL, &spec->cp_cp_insert_abort, 0); CKERR(r);
insert_n_broken(db, NULL, spec->cp_cp_insert_abort, key, OPER_PER_STEP);
r = spec->cp_cp_insert_abort->abort(spec->cp_cp_insert_abort); CKERR(r);
// begin cp, abort post
key = firstkey(iter - 1, CP_POST_STEP);
r = env->txn_begin(env, NULL, &spec->cp_post_insert_abort, 0); CKERR(r);
insert_n_broken(db, NULL, spec->cp_post_insert_abort, key, OPER_PER_STEP);
}
// ---- INCOMPLETE INSERTIONS THAT WOULD OVERWRITE I-2 ITERATIONS AGO ----
if ( iter > 1 ) {
// begin cp, incomplete
key = firstkey(iter - 2, CP_CP_STEP);
r = env->txn_begin(env, NULL, &spec->cp_insert_incmplt, 0); CKERR(r);
insert_n_broken(db, NULL, spec->cp_insert_incmplt, key, OPER_PER_STEP);
}
// ---- ABORTED DELETES THAT WOULD DELETE I-3 ITERATIONS AGO ----
if ( iter > 2 ) {
// begin pre, abort cp
r = spec->pre_cp_delete_abort->abort(spec->pre_cp_delete_abort); CKERR(r);
// begin cp, abort cp
key = firstkey(iter - 3, CP_CP_STEP);
r = env->txn_begin(env, NULL, &spec->cp_cp_delete_abort, 0); CKERR(r);
delete_n(db, NULL, spec->cp_cp_delete_abort, key, OPER_PER_STEP, 0);
r = spec->cp_cp_delete_abort->abort(spec->cp_cp_delete_abort); CKERR(r);
// begin cp, abort post
key = firstkey(iter - 3, CP_POST_STEP);
r = env->txn_begin(env, NULL, &spec->cp_post_delete_abort, 0); CKERR(r);
insert_n_broken(db, NULL, spec->cp_post_delete_abort, key, OPER_PER_STEP);
}
// ---- INCOMPLETE DELETES THAT WOULD DELETE I-4 ITERATIONS AGO ----
if ( iter > 3 ) {
// begin pre, incomplete
key = firstkey(iter - 4, CP_CP_STEP);
r = env->txn_begin(env, NULL, &spec->cp_delete_incmplt, 0); CKERR(r);
delete_n(db, NULL, spec->cp_delete_incmplt, key, OPER_PER_STEP, 0);
}
// ---- GOOD DELETES THAT REMOVE I-5 ITERATIONS AGO ----
if ( iter > 4 ) {
// begin pre, commit cp
r = spec->pre_cp_delete_commit->commit(spec->pre_cp_delete_commit, 0); CKERR(r);
// begin cp, commit cp
key = firstkey(iter - 5, CP_CP_STEP);
r = env->txn_begin(env, NULL, &spec->cp_cp_delete_commit, 0); CKERR(r);
delete_n(db, NULL, spec->cp_cp_delete_commit, key, OPER_PER_STEP, 0);
r = spec->cp_cp_delete_commit->commit(spec->cp_cp_delete_commit, 0); CKERR(r);
// begin cp, commit post
key = firstkey(iter - 5, CP_POST_STEP);
r = env->txn_begin(env, NULL, &spec->cp_post_delete_commit, 0); CKERR(r);
delete_n(db, NULL, spec->cp_post_delete_commit, key, OPER_PER_STEP, 0);
}
}
return;
}
static void post_checkpoint_acts(DICTIONARY dictionaries, ITER_SPEC spec) {
int i, r, key;
DB *db;
int iter = spec->iter;
assert(spec->step == POST_POST_STEP);
// iDBG(iter);
for (i=0;i<NUM_DICTIONARIES;i++) {
db = dictionaries[i].db;
// ---- GOOD INSERTIONS FOR THIS ITERATION ----
// begin pre, commit post
r = spec->pre_post_insert_commit->commit(spec->pre_post_insert_commit, 0); CKERR(r);
// begin cp, commit post
r = spec->cp_post_insert_commit->commit(spec->cp_post_insert_commit, 0); CKERR(r);
// begin post, commit post
key = firstkey(iter, POST_POST_STEP);
r = env->txn_begin(env, NULL, &spec->post_post_insert_commit, 0); CKERR(r);
insert_n_fixed(db, NULL, spec->post_post_insert_commit, key, OPER_PER_STEP);
r = spec->post_post_insert_commit->commit(spec->post_post_insert_commit, 0); CKERR(r);
// ---- ABORTED INSERTIONS THAT WOULD OVERWRITE PREVIOUS ITERATION ----
if ( iter > 0 ) {
// begin pre, abort post
r = spec->pre_post_insert_abort->abort(spec->pre_post_insert_abort); CKERR(r);
// begin cp, abort post
r = spec->cp_post_insert_abort->abort(spec->cp_post_insert_abort); CKERR(r);
// begin post, abort post
key = firstkey(iter - 1, POST_POST_STEP);
r = env->txn_begin(env, NULL, &spec->post_post_insert_abort, 0); CKERR(r);
insert_n_broken(db, NULL, spec->post_post_insert_abort, key, OPER_PER_STEP);
r = spec->post_post_insert_abort->abort(spec->post_post_insert_abort); CKERR(r);
}
// ---- INCOMPLETE INSERTIONS THAT WOULD OVERWRITE I-2 ITERATIONS AGO ----
if ( iter > 1 ) {
// begin post, incomplete
key = firstkey(iter - 2, POST_POST_STEP);
r = env->txn_begin(env, NULL, &spec->post_insert_incmplt, 0); CKERR(r);
insert_n_broken(db, NULL, spec->post_insert_incmplt, key, OPER_PER_STEP);
}
// ---- ABORTED DELETES THAT WOULD DELETE I-3 ITERATIONS AGO ----
if ( iter > 2 ) {
// begin pre, abort post
r = spec->pre_post_delete_abort->abort(spec->pre_post_delete_abort); CKERR(r);
// begin cp, abort post
r = spec->cp_post_delete_abort->abort(spec->cp_post_delete_abort); CKERR(r);
// begin post, abort post
key = firstkey(iter - 3, POST_POST_STEP);
r = env->txn_begin(env, NULL, &spec->post_post_delete_abort, 0); CKERR(r);
delete_n(db, NULL, spec->post_post_delete_abort, key, OPER_PER_STEP, 0);
r = spec->post_post_delete_abort->abort(spec->post_post_delete_abort); CKERR(r);
}
// ---- INCOMPLETE DELETES THAT WOULD DELETE I-4 ITERATIONS AGO ----
if ( iter > 3 ) {
// begin post, incomplete
key = firstkey(iter - 4, POST_POST_STEP);
r = env->txn_begin(env, NULL, &spec->post_delete_incmplt, 0); CKERR(r);
delete_n(db, NULL, spec->post_delete_incmplt, key, OPER_PER_STEP, 0);
}
// ---- GOOD DELETES THAT REMOVE I-5 ITERATIONS AGO ----
if ( iter > 4 ) {
// begin pre, commit post
r = spec->pre_post_delete_commit->commit(spec->pre_post_delete_commit, 0); CKERR(r);
// begin cp, commit post
r = spec->cp_post_delete_commit->commit(spec->cp_post_delete_commit, 0); CKERR(r);
// begin post, commit post
key = firstkey(iter - 5, CP_CP_STEP);
r = env->txn_begin(env, NULL, &spec->post_post_delete_commit, 0); CKERR(r);
delete_n(db, NULL, spec->post_post_delete_commit, key, OPER_PER_STEP, 0);
r = spec->post_post_delete_commit->commit(spec->post_post_delete_commit, 0); CKERR(r);
}
}
return;
}
static void run_test (int iter, int die UU()) {
u_int32_t flags = DB_DUP|DB_DUPSORT;
int i, r;
if (iter == 0)
dir_create(); // create directory if first time through
// Run with cachesize of 256 bytes per iteration
// to force lots of disk I/O
// (each iteration inserts about 4K rows/dictionary, 16 bytes/row, 4 dictionaries = 256K bytes inserted per iteration)
u_int64_t cachebytes = 0; // 0 => use default size
const int32_t K256 = 256 * 1024;
cachebytes = K256 * (iter + 1) - (128 * 1024);
if (cachebytes > max_windows_cachesize)
cachebytes = 0;
if (iter & 2) cachebytes = 0; // use default cachesize half the time
if (verbose) printf("%s: iter = %d\n", __FILE__, iter);
int recovery_flags = DB_INIT_LOG;
if ( iter != 0 )
recovery_flags += DB_RECOVER;
env_startup(cachebytes, recovery_flags);
// create array of dictionaries
// for each dictionary verify previous iterations and perform new inserts
DICTIONARY_S dictionaries[NUM_DICTIONARIES];
for (i = 0; i < NUM_DICTIONARIES; i++) {
char name[32];
sprintf(name, "stress_%d", i);
init_dictionary(&dictionaries[i], flags, name);
db_startup(&dictionaries[i], NULL);
}
// verify previous results
verify(dictionaries, iter);
struct iteration_spec spec;
spec.iter = iter;
spec.step = PRE_PRE_STEP;
// perform pre-checkpoint actions
pre_checkpoint_acts(dictionaries, &spec);
// take checkpoint (all dictionaries)
spec.step = CP_CP_STEP;
checkpoint_acts(dictionaries, &spec); // not correct - placeholder for now
snapshot(NULL, 1);
// post checkpoint acts
spec.step = POST_POST_STEP;
post_checkpoint_acts(dictionaries, &spec);
// if requesting crash, randomly do other non-committed acts, then "drop_dead"
if (die && (iter > 0)) {
if (verbose) printf("dying\n");
#if 0
// separate thread will perform random acts on other dictionaries (not 0)
r = toku_pthread_create(&thread, 0, random_acts, (void *) dictionaries);
CKERR(r);
// this thead will scribble over dictionary 0 before crash to verify that
// post-checkpoint inserts are not in the database
DB* db = dictionaries[0].db;
if (iter & 1)
scribble(db, iter);
else
thin_out(db, iter);
#endif
u_int32_t delay = myrandom();
delay &= 0xFFF; // select lower 12 bits, shifted up 8 for random number ...
delay = delay << 8; // ... uniformly distributed between 0 and 1M ...
usleep(delay); // ... to sleep up to one second (1M usec)
drop_dead();
}
for (i = 0; i < NUM_DICTIONARIES; i++) {
db_shutdown(&dictionaries[i]);
}
r = env->close(env, 0);
assert((r == 0) || (r == EINVAL)); // OK to have open transactions prior to close
}
// ------------ infrastructure ----------
static void do_args(int argc, char *argv[]);
static int iter_arg = 0;
static int do_crash = 0;
int test_main(int argc, char **argv) {
do_args(argc, argv);
run_test(iter_arg,do_crash);
return 0;
}
static void do_args(int argc, char *argv[]) {
int resultcode;
char *cmd = argv[0];
argc--; argv++;
while (argc>0) {
if (strcmp(argv[0], "-v") == 0) {
verbose++;
} else if (strcmp(argv[0],"-q")==0) {
verbose--;
if (verbose<0) verbose=0;
} else if (strcmp(argv[0], "-h")==0) {
resultcode=0;
do_usage:
fprintf(stderr, "Usage:\n%s [-v|-q]* [-h] [-i] [-C] \n", cmd);
exit(resultcode);
} else if (strcmp(argv[0], "-i")==0) {
argc--; argv++;
iter_arg = atoi(argv[0]);
} else if (strcmp(argv[0], "-C")==0) {
do_crash = 1;
} else {
fprintf(stderr, "Unknown arg: %s\n", argv[0]);
resultcode=1;
goto do_usage;
}
argc--;
argv++;
}
}
src/tests/recovery_stress.py 0 → 100755
View file @ eaf42812
#!/usr/local/bin/python2.6
#
# Copyright (C) 2009 Tokutek, Inc.
#
import sys
import os
import optparse
# options
parser = optparse.OptionParser()
parser.add_option('--iterations', dest='iterations', type='int', default=1, help="Number of test iterations (default = 1)")
parser.add_option('--crash', dest='crash', action="store_true", default=False, help="Crash the DB every iteration (default = FALSE)")
parser.add_option('--verbose', dest='verbose', action="store_true", default=False, help="Verbose printing (default = FALSE)")
options, remainder = parser.parse_args()
def run_test():
cmd = 'recovery_stress.tdb'
if ( options.verbose ): cmd += ' -v'
if ( options.crash ): cmd += ' -C'
for i in range(options.iterations):
os.system(cmd + ' -i %d' % (i))
def main(argv):
run_test()
return 0
if __name__ == '__main__':
usage = sys.modules["__main__"].__doc__
parser.set_usage(usage)
unused_flags, new_argv = parser.parse_args(args=sys.argv[1:], values=options)
sys.exit(main([sys.argv[0]] + new_argv))
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