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flowop.c
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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#include "config.h"
#ifdef HAVE_LWPS
#include <sys/lwp.h>
#endif
#include <fcntl.h>
#include "filebench.h"
#include "flowop.h"
#include "stats.h"
#include "ioprio.h"
static flowop_t *flowop_define_common(threadflow_t *threadflow, char *name,
flowop_t *inherit, flowop_t **flowoplist_hdp, int instance, int type);
static int flowop_composite(threadflow_t *threadflow, flowop_t *flowop);
static int flowop_composite_init(flowop_t *flowop);
static void flowop_composite_destruct(flowop_t *flowop);
/*
* A collection of flowop support functions. The actual code that
* implements the various flowops is in flowop_library.c.
*
* Routines for defining, creating, initializing and destroying
* flowops, cyclically invoking the flowops on each threadflow's flowop
* list, collecting statistics about flowop execution, and other
* housekeeping duties are included in this file.
*
* User Defined Composite Flowops
* The ability to define new flowops as lists of built-in or previously
* defined flowops has been added to Filebench. In a sense they are like
* in-line subroutines, which can have default attributes set at definition
* time and passed arguments at invocation time. Like other flowops (and
* unlike conventional subroutines) you can invoke them with an iteration
* count (the "iter" attribute), and they will loop through their associated
* list of flowops for "iter" number of times each time they are encountered
* in the thread or outer composite flowop which invokes them.
*
* Composite flowops are created with a "define" command, are given a name,
* optional default attributes, and local variable definitions on the
* "define" command line, followed by a brace enclosed list of flowops
* to execute. The enclosed flowops may include attributes that reference
* the local variables, as well as constants and global variables.
*
* Composite flowops are used pretty much like regular flowops, but you can
* also set local variables to constants or global variables ($local_var =
* [$var | $random_var | string | boolean | integer | double]) as part of
* the invocation. Thus each invocation can pass customized values to its
* inner flowops, greatly increasing their generality.
*
* All flowops are placed on a global, singly linked list, with fo_next
* being the link pointer for this list. The are also placed on a private
* list for the thread or composite flowop they are part of. The tf_thrd_fops
* pointer in the thread will point to the list of top level flowops in the
* thread, which are linked together by fo_exec_next. If any of these flowops
* are composite flowops, they will have a list of second level flowops rooted
* at the composite flowop's fo_comp_fops pointer. So, there is one big list
* of all flowops, and an n-arry tree of threads, composite flowops, and
* flowops, with composite flowops being the branch nodes in the tree.
*
* To illustrate, if we have three first level flowops, the first of which is
* a composite flowop consisting of two other flowops, we get:
*
* Thread->tf_thrd_fops -> flowop->fo_exec_next -> flowop->fo_exec_next
* flowop->fo_comp_fops |
* | V
* | flowop->fo_exec_next
* |
* V
* flowop->fo_exec_next -> flowop->fo_exec_next
*
* And all five flowops (plus others from any other threads) are on a global
* list linked with fo_next.
*/
/*
* Prints the name and instance number of each flowop in
* the supplied list to the filebench log.
*/
int
flowop_printlist(flowop_t *list)
{
flowop_t *flowop = list;
while (flowop) {
filebench_log(LOG_DEBUG_IMPL, "flowop-list %s-%d",
flowop->fo_name, flowop->fo_instance);
flowop = flowop->fo_exec_next;
}
return (0);
}
/*
* Prints the name and instance number of all flowops on
* the master flowop list to the console and the filebench log.
*/
void
flowop_printall(void)
{
flowop_t *flowop = filebench_shm->shm_flowoplist;
while (flowop) {
filebench_log(LOG_VERBOSE, "flowop-list %s-%d",
flowop->fo_name, flowop->fo_instance);
flowop = flowop->fo_next;
}
}
#define TIMESPEC_TO_HRTIME(s, e) (((e.tv_sec - s.tv_sec) * 1000000000LL) + \
(e.tv_nsec - s.tv_nsec))
/*
* Puts current high resolution time in start time entry
* for threadflow and may also calculate running filebench
* overhead statistics.
*/
void
flowop_beginop(threadflow_t *threadflow, flowop_t *flowop)
{
#ifdef HAVE_PROC_PID_LWP
if ((filebench_shm->shm_mmode & FILEBENCH_MODE_NOUSAGE) == 0) {
if (threadflow->tf_lwpusagefd == 0) {
char procname[128];
(void) snprintf(procname, sizeof (procname),
"/proc/%d/lwp/%d/lwpusage", (int)my_pid, _lwp_self());
threadflow->tf_lwpusagefd = open(procname, O_RDONLY);
}
(void) pread(threadflow->tf_lwpusagefd,
&threadflow->tf_susage,
sizeof (struct prusage), 0);
/* Compute overhead time in this thread around op */
if (threadflow->tf_eusage.pr_stime.tv_nsec) {
flowop->fo_stats.fs_mstate[FLOW_MSTATE_OHEAD] +=
TIMESPEC_TO_HRTIME(threadflow->tf_eusage.pr_utime,
threadflow->tf_susage.pr_utime) +
TIMESPEC_TO_HRTIME(threadflow->tf_eusage.pr_ttime,
threadflow->tf_susage.pr_ttime) +
TIMESPEC_TO_HRTIME(threadflow->tf_eusage.pr_stime,
threadflow->tf_susage.pr_stime);
}
}
#elif defined(HAVE_PROC_PID_STAT)
int tid;
char fname[128], dummy_str[64];
unsigned long utime, stime;
FILE *filep;
int ret;
tid = gettid();
filebench_log(LOG_DEBUG_SCRIPT, "proc/pid/stat called ==> tid = %d", tid);
sprintf(fname,"/proc/%d/stat", tid);
filep = fopen(fname, "r");
if (filep) {
ret = fscanf(filep, "%s %s %s %s %s %s %s %s %s %s %s %s %s %lu %lu", \
dummy_str, dummy_str, dummy_str, dummy_str,
dummy_str, dummy_str, dummy_str, dummy_str,
dummy_str, dummy_str, dummy_str, dummy_str,
dummy_str, &utime, &stime);
flowop->fo_start_usage = (utime + stime) * 10000000;
fclose(filep);
} else {
filebench_log(LOG_ERROR, "Unable to open proc/<pid>/stat file for given thread (errno=%d)", errno);
}
#endif
/* Start of op for this thread */
threadflow->tf_stime = gethrtime();
}
struct flowstats controlstats;
pthread_mutex_t controlstats_lock;
static int controlstats_zeroed = 0;
static void
flowop_populate_distribution(flowop_t *flowop, unsigned long long ll_delay)
{
unsigned int i, iii;
iii = 1;
for (i = 0; i < 32; i++) {
if (ll_delay < iii)
break;
iii <<= 1;
}
flowop->fo_stats.fs_distribution[i]++;
}
/*
* Updates flowop's latency statistics, using saved start
* time and current high resolution time. Updates flowop's
* io count and transferred bytes statistics. Also updates
* threadflow's and flowop's cumulative read or write byte
* and io count statistics.
*/
void
flowop_endop(threadflow_t *threadflow, flowop_t *flowop, int64_t bytes)
{
unsigned long long ll_delay;
#if defined(HAVE_PROC_PID_LWP) || defined(HAVE_PROC_PID_STAT)
hrtime_t t = 0;
#endif
ll_delay = (gethrtime() - threadflow->tf_stime);
/* setting minimum and maximum latencies for this flowop */
if (!flowop->fo_stats.fs_minlat || ll_delay < flowop->fo_stats.fs_minlat)
flowop->fo_stats.fs_minlat = ll_delay;
if (ll_delay > flowop->fo_stats.fs_maxlat)
flowop->fo_stats.fs_maxlat = ll_delay;
flowop->fo_stats.fs_mstate[FLOW_MSTATE_LAT] += ll_delay;
#ifdef HAVE_PROC_PID_LWP
if ((filebench_shm->shm_mmode & FILEBENCH_MODE_NOUSAGE) == 0) {
if ((pread(threadflow->tf_lwpusagefd, &threadflow->tf_eusage,
sizeof (struct prusage), 0)) != sizeof (struct prusage))
filebench_log(LOG_ERROR, "cannot read /proc");
t =
TIMESPEC_TO_HRTIME(threadflow->tf_susage.pr_utime,
threadflow->tf_eusage.pr_utime) +
TIMESPEC_TO_HRTIME(threadflow->tf_susage.pr_ttime,
threadflow->tf_eusage.pr_ttime) +
TIMESPEC_TO_HRTIME(threadflow->tf_susage.pr_stime,
threadflow->tf_eusage.pr_stime);
flowop->fo_stats.fs_mstate[FLOW_MSTATE_CPU] += t;
flowop->fo_stats.fs_mstate[FLOW_MSTATE_WAIT] +=
TIMESPEC_TO_HRTIME(threadflow->tf_susage.pr_tftime,
threadflow->tf_eusage.pr_tftime) +
TIMESPEC_TO_HRTIME(threadflow->tf_susage.pr_dftime,
threadflow->tf_eusage.pr_dftime) +
TIMESPEC_TO_HRTIME(threadflow->tf_susage.pr_kftime,
threadflow->tf_eusage.pr_kftime) +
TIMESPEC_TO_HRTIME(threadflow->tf_susage.pr_kftime,
threadflow->tf_eusage.pr_kftime) +
TIMESPEC_TO_HRTIME(threadflow->tf_susage.pr_slptime,
threadflow->tf_eusage.pr_slptime);
}
#elif defined(HAVE_PROC_PID_STAT)
int tid;
char fname[128], dummy_str[64];
unsigned long utime, stime;
FILE *filep;
int ret;
if ((filebench_shm->shm_mmode & FILEBENCH_MODE_NOUSAGE) == 0) {
tid = gettid();
filebench_log(LOG_DEBUG_SCRIPT, "proc/pid/stat called ==> tid = %d", tid);
sprintf(fname,"/proc/%d/stat", tid);
filep = fopen(fname, "r");
if (filep) {
ret = fscanf(filep, "%s %s %s %s %s %s %s %s %s %s %s %s %s %lu %lu", \
dummy_str, dummy_str, dummy_str, dummy_str,
dummy_str, dummy_str, dummy_str, dummy_str,
dummy_str, dummy_str, dummy_str, dummy_str,
dummy_str, &utime, &stime);
t = utime + stime;
t = (t * 10000000) - flowop->fo_start_usage;
flowop->fo_stats.fs_mstate[FLOW_MSTATE_CPU] += t;
fclose(filep);
} else {
filebench_log(LOG_ERROR, "Unable to open proc/<pid>/stat file for given thread (errno=%d)", errno);
}
}
#endif
flowop->fo_stats.fs_count++;
flowop->fo_stats.fs_bytes += bytes;
(void) ipc_mutex_lock(&controlstats_lock);
if ((flowop->fo_type & FLOW_TYPE_IO) ||
(flowop->fo_type & FLOW_TYPE_AIO)) {
controlstats.fs_count++;
controlstats.fs_bytes += bytes;
}
if (flowop->fo_attrs & FLOW_ATTR_READ) {
threadflow->tf_stats.fs_rbytes += bytes;
threadflow->tf_stats.fs_rcount++;
flowop->fo_stats.fs_rcount++;
controlstats.fs_rbytes += bytes;
controlstats.fs_rcount++;
} else if (flowop->fo_attrs & FLOW_ATTR_WRITE) {
threadflow->tf_stats.fs_wbytes += bytes;
threadflow->tf_stats.fs_wcount++;
flowop->fo_stats.fs_wcount++;
controlstats.fs_wbytes += bytes;
controlstats.fs_wcount++;
}
if (filebench_shm->osprof_enabled)
flowop_populate_distribution(flowop, ll_delay);
(void) ipc_mutex_unlock(&controlstats_lock);
}
/*
* Calls the flowop's initialization function, pointed to by
* flowop->fo_init.
*/
static int
flowop_initflow(flowop_t *flowop)
{
/*
* save static copies of two items, in case they are supplied
* from random variables
*/
if (!AVD_IS_STRING(flowop->fo_value))
flowop->fo_constvalue = avd_get_int(flowop->fo_value);
flowop->fo_constwss = avd_get_int(flowop->fo_wss);
if ((*flowop->fo_init)(flowop) < 0) {
filebench_log(LOG_ERROR, "flowop %s-%d init failed",
flowop->fo_name, flowop->fo_instance);
return (-1);
}
return (0);
}
static int
flowop_create_runtime_flowops(threadflow_t *threadflow, flowop_t **ops_list_ptr)
{
flowop_t *flowop = *ops_list_ptr;
char *name;
while (flowop) {
flowop_t *newflowop;
if (flowop == *ops_list_ptr)
*ops_list_ptr = NULL;
newflowop = flowop_define_common(threadflow, flowop->fo_name,
flowop, ops_list_ptr, 1, 0);
if (newflowop == NULL)
return (FILEBENCH_ERROR);
/* check for fo_filename attribute, and resolve if present */
if (flowop->fo_filename) {
name = avd_get_str(flowop->fo_filename);
newflowop->fo_fileset = fileset_find(name);
if (newflowop->fo_fileset == NULL) {
filebench_log(LOG_ERROR,
"flowop %s: file %s not found",
newflowop->fo_name, name);
filebench_shutdown(1);
}
}
/* check for fo_possetname attribute, and resolve if present */
if (flowop->fo_possetname) {
name = avd_get_str(flowop->fo_possetname);
newflowop->fo_posset = posset_find(name);
if (newflowop->fo_posset == NULL) {
filebench_log(LOG_ERROR,
"flowop %s: posset %s not found",
newflowop->fo_name, name);
filebench_shutdown(1);
}
}
if (flowop_initflow(newflowop) < 0) {
filebench_log(LOG_ERROR, "Flowop init of %s failed",
newflowop->fo_name);
}
flowop = flowop->fo_exec_next;
}
return (FILEBENCH_OK);
}
/*
* Calls the flowop's destruct function, pointed to by
* flowop->fo_destruct.
*/
static void
flowop_destructflow(flowop_t *flowop)
{
(*flowop->fo_destruct)(flowop);
}
/*
* call the destruct funtions of all the threadflow's flowops,
* if it is still flagged as "running".
*/
void
flowop_destruct_all_flows(threadflow_t *threadflow)
{
flowop_t *flowop;
/* wait a moment to give other threads a chance to stop too */
(void) sleep(1);
(void) ipc_mutex_lock(&threadflow->tf_lock);
/* prepare to call destruct flow routines, if necessary */
if (threadflow->tf_running == 0) {
/* allready destroyed */
(void) ipc_mutex_unlock(&threadflow->tf_lock);
return;
}
flowop = threadflow->tf_thrd_fops;
threadflow->tf_running = 0;
(void) ipc_mutex_unlock(&threadflow->tf_lock);
while (flowop) {
flowop_destructflow(flowop);
flowop = flowop->fo_exec_next;
}
}
/*
* The final initialization and main execution loop for the
* worker threads. Sets threadflow and flowop start times,
* waits for all process to start, then creates the runtime
* flowops from those defined by the F language workload
* script. It does some more initialization, then enters a
* loop to repeatedly execute the flowops on the flowop list
* until an abort condition is detected, at which time it exits.
* This is the starting routine for the new worker thread
* created by threadflow_createthread(), and is not currently
* called from anywhere else.
*/
void
flowop_start(threadflow_t *threadflow)
{
flowop_t *flowop;
size_t memsize;
int ret = FILEBENCH_OK;
set_thread_ioprio(threadflow);
#ifdef HAVE_PROC_PID_LWP
char procname[128];
long ctl[2] = {PCSET, PR_MSACCT};
int pfd;
(void) snprintf(procname, sizeof (procname),
"/proc/%d/lwp/%d/lwpctl", (int)my_pid, _lwp_self());
pfd = open(procname, O_WRONLY);
(void) pwrite(pfd, &ctl, sizeof (ctl), 0);
(void) close(pfd);
#endif
(void) ipc_mutex_lock(&controlstats_lock);
if (!controlstats_zeroed) {
(void) memset(&controlstats, 0, sizeof (controlstats));
controlstats_zeroed = 1;
}
(void) ipc_mutex_unlock(&controlstats_lock);
flowop = threadflow->tf_thrd_fops;
/* Hold the flowop find lock as reader to prevent lookups */
(void) pthread_rwlock_rdlock(&filebench_shm->shm_flowop_find_lock);
/* Create the runtime flowops from those defined by the script */
(void) ipc_mutex_lock(&filebench_shm->shm_flowop_lock);
if (flowop_create_runtime_flowops(threadflow, &threadflow->tf_thrd_fops)
!= FILEBENCH_OK) {
(void) ipc_mutex_unlock(&filebench_shm->shm_flowop_lock);
filebench_shutdown(1);
return;
}
(void) ipc_mutex_unlock(&filebench_shm->shm_flowop_lock);
/* Release the find lock as reader to allow lookups */
(void) pthread_rwlock_unlock(&filebench_shm->shm_flowop_find_lock);
/* Set to the start of the new flowop list */
flowop = threadflow->tf_thrd_fops;
memsize = (size_t)threadflow->tf_constmemsize;
/* If we are going to use ISM, allocate later */
if (threadflow->tf_attrs & THREADFLOW_USEISM) {
threadflow->tf_mem =
ipc_ismmalloc(memsize);
} else {
threadflow->tf_mem =
malloc(memsize);
}
(void) memset(threadflow->tf_mem, 0, memsize);
filebench_log(LOG_DEBUG_SCRIPT, "Thread allocated %d bytes", memsize);
#ifdef HAVE_LWPS
filebench_log(LOG_DEBUG_SCRIPT, "Thread %zx (%d) started",
threadflow,
_lwp_self());
#endif
/*
* Now we set tf_running flag to indicate to the main process
* that the worker thread is running. However, the thread is
* still not executing the workload, as it is blocked by the
* shm_run_lock. Main thread will release this lock when all
* threads set their tf_running flag to 1.
*/
threadflow->tf_abort = 0;
threadflow->tf_running = 1;
/*
* Block until all processes have started, acting like
* a barrier. The original filebench process initially
* holds the run_lock as a reader, preventing any of the
* threads from obtaining the writer lock, and hence
* passing this point. Once all processes and threads
* have been created, the original process unlocks
* run_lock, allowing each waiting thread to lock
* and then immediately unlock it, then begin running.
*/
(void) pthread_rwlock_wrlock(&filebench_shm->shm_run_lock);
(void) pthread_rwlock_unlock(&filebench_shm->shm_run_lock);
/* Main filebench worker loop */
while (ret == FILEBENCH_OK) {
int i, count;
/* Abort if asked */
if (threadflow->tf_abort || filebench_shm->shm_f_abort)
break;
/* Be quiet while stats are gathered */
if (filebench_shm->shm_bequiet) {
(void) sleep(1);
continue;
}
/* Take it easy until everyone is ready to go */
if (!filebench_shm->shm_procs_running) {
(void) sleep(1);
continue;
}
if (flowop == NULL) {
filebench_log(LOG_ERROR, "flowop_read null flowop");
return;
}
/* Execute the flowop for fo_iters times */
count = (int)avd_get_int(flowop->fo_iters);
for (i = 0; i < count; i++) {
filebench_log(LOG_DEBUG_SCRIPT, "%s: executing flowop "
"%s-%d", threadflow->tf_name, flowop->fo_name,
flowop->fo_instance);
ret = (*flowop->fo_func)(threadflow, flowop);
/*
* Return value FILEBENCH_ERROR means "flowop
* failed, stop the filebench run"
*/
if (ret == FILEBENCH_ERROR) {
filebench_log(LOG_ERROR,
"%s-%d: flowop %s-%d failed",
threadflow->tf_name,
threadflow->tf_instance,
flowop->fo_name,
flowop->fo_instance);
(void) ipc_mutex_lock(&threadflow->tf_lock);
threadflow->tf_abort = 1;
filebench_shm->shm_f_abort =
FILEBENCH_ABORT_ERROR;
(void) ipc_mutex_unlock(&threadflow->tf_lock);
break;
}
/*
* Return value of FILEBENCH_NORSC means "stop
* the filebench run" if in "end on no work mode",
* otherwise it indicates an error
*/
if (ret == FILEBENCH_NORSC) {
(void) ipc_mutex_lock(&threadflow->tf_lock);
threadflow->tf_abort = FILEBENCH_DONE;
if (filebench_shm->shm_rmode ==
FILEBENCH_MODE_Q1STDONE) {
filebench_shm->shm_f_abort =
FILEBENCH_ABORT_RSRC;
} else if (filebench_shm->shm_rmode !=
FILEBENCH_MODE_QALLDONE) {
filebench_log(LOG_ERROR1,
"WARNING! Run stopped early:\n "
" flowop %s-%d could "
"not obtain a file. Please\n "
" reduce runtime, "
"increase fileset entries "
"($nfiles), or switch modes.",
flowop->fo_name,
flowop->fo_instance);
filebench_shm->shm_f_abort =
FILEBENCH_ABORT_ERROR;
}
(void) ipc_mutex_unlock(&threadflow->tf_lock);
break;
}
/*
* Return value of FILEBENCH_DONE means "stop
* the filebench run without error"
*/
if (ret == FILEBENCH_DONE) {
(void) ipc_mutex_lock(&threadflow->tf_lock);
threadflow->tf_abort = FILEBENCH_DONE;
filebench_shm->shm_f_abort =
FILEBENCH_ABORT_DONE;
(void) ipc_mutex_unlock(&threadflow->tf_lock);
break;
}
/*
* If we get here and the return is something other
* than FILEBENCH_OK, it means a spurious code
* was returned, so treat as major error. This
* probably indicates a bug in the flowop.
*/
if (ret != FILEBENCH_OK) {
filebench_log(LOG_ERROR,
"Flowop %s unexpected return value = %d\n",
flowop->fo_name, ret);
filebench_shm->shm_f_abort =
FILEBENCH_ABORT_ERROR;
break;
}
}
/* advance to next flowop */
flowop = flowop->fo_exec_next;
/* but if at end of list, start over from the beginning */
if (flowop == NULL) {
flowop = threadflow->tf_thrd_fops;
threadflow->tf_stats.fs_count++;
}
}
#ifdef HAVE_LWPS
filebench_log(LOG_DEBUG_SCRIPT, "Thread %d exiting",
_lwp_self());
#endif
/* Tell flowops to destroy locally acquired state */
flowop_destruct_all_flows(threadflow);
pthread_exit(&threadflow->tf_abort);
}
void flowoplib_flowinit(void);
void fb_lfs_flowinit(void);
void
flowop_init(void)
{
(void) pthread_mutex_init(&controlstats_lock,
ipc_mutexattr(IPC_MUTEX_NORMAL));
flowoplib_flowinit();
}
static int plugin_flowinit_done = FALSE;
/*
* Initialize any "plug-in" flowops. Called when the first "create fileset"
* command is encountered.
*/
void
flowop_plugin_flowinit(void)
{
if (plugin_flowinit_done)
return;
plugin_flowinit_done = TRUE;
switch (filebench_shm->shm_filesys_type) {
case LOCAL_FS_PLUG:
fb_lfs_flowinit();
break;
case NFS3_PLUG:
case NFS4_PLUG:
case CIFS_PLUG:
break;
}
}
/*
* Delete the designated flowop from the thread's flowop list.
*/
static void
flowop_delete(flowop_t **flowoplist, flowop_t *flowop)
{
flowop_t *entry = *flowoplist;
int found = 0;
filebench_log(LOG_DEBUG_IMPL, "Deleting flowop (%s-%d)",
flowop->fo_name,
flowop->fo_instance);
/* Delete from thread's flowop list */
if (flowop == *flowoplist) {
/* First on list */
*flowoplist = flowop->fo_exec_next;
filebench_log(LOG_DEBUG_IMPL,
"Delete0 flowop: (%s-%d)",
flowop->fo_name,
flowop->fo_instance);
} else {
while (entry->fo_exec_next) {
filebench_log(LOG_DEBUG_IMPL,
"Delete0 flowop: (%s-%d) == (%s-%d)",
entry->fo_exec_next->fo_name,
entry->fo_exec_next->fo_instance,
flowop->fo_name,
flowop->fo_instance);
if (flowop == entry->fo_exec_next) {
/* Delete */
filebench_log(LOG_DEBUG_IMPL,
"Deleted0 flowop: (%s-%d)",
entry->fo_exec_next->fo_name,
entry->fo_exec_next->fo_instance);
entry->fo_exec_next =
entry->fo_exec_next->fo_exec_next;
break;
}
entry = entry->fo_exec_next;
}
}
#ifdef HAVE_PROC_PID_LWP
/* Close /proc stats */
if (flowop->fo_thread)
(void) close(flowop->fo_thread->tf_lwpusagefd);
#endif
/* Delete from global list */
entry = filebench_shm->shm_flowoplist;
if (flowop == filebench_shm->shm_flowoplist) {
/* First on list */
filebench_shm->shm_flowoplist = flowop->fo_next;
found = 1;
} else {
while (entry->fo_next) {
filebench_log(LOG_DEBUG_IMPL,
"Delete flowop: (%s-%d) == (%s-%d)",
entry->fo_next->fo_name,
entry->fo_next->fo_instance,
flowop->fo_name,
flowop->fo_instance);
if (flowop == entry->fo_next) {
/* Delete */
entry->fo_next = entry->fo_next->fo_next;
found = 1;
break;
}
entry = entry->fo_next;
}
}
if (found) {
filebench_log(LOG_DEBUG_IMPL,
"Deleted flowop: (%s-%d)",
flowop->fo_name,
flowop->fo_instance);
ipc_free(FILEBENCH_FLOWOP, (char *)flowop);
} else {
filebench_log(LOG_DEBUG_IMPL, "Flowop %s-%d not found!",
flowop->fo_name,
flowop->fo_instance);
}
}
/*
* Deletes all the flowops from a flowop list.
*/
void
flowop_delete_all(flowop_t **flowoplist)
{
flowop_t *flowop = *flowoplist;
flowop_t *next_flowop;
(void) ipc_mutex_lock(&filebench_shm->shm_flowop_lock);
while (flowop) {
filebench_log(LOG_DEBUG_IMPL, "Deleting flowop (%s-%d)",
flowop->fo_name, flowop->fo_instance);
if (flowop->fo_instance &&
(flowop->fo_instance == FLOW_MASTER)) {
flowop = flowop->fo_exec_next;
continue;
}
next_flowop = flowop->fo_exec_next;
flowop_delete(flowoplist, flowop);
flowop = next_flowop;
}
(void) ipc_mutex_unlock(&filebench_shm->shm_flowop_lock);
}
/*
* Allocates a flowop entity and initializes it with inherited
* contents from the "inherit" flowop, if it is supplied, or
* with zeros otherwise. In either case the fo_next and fo_exec_next
* pointers are set to NULL, and fo_thread is set to point to
* the owning threadflow. The initialized flowop is placed at
* the head of the global flowop list, and also placed on the
* tail of the supplied local flowop list, which will either
* be a threadflow's tf_thrd_fops list or a composite flowop's
* fo_comp_fops list. The routine locks the flowop's fo_lock and
* leaves it held on return. If successful, it returns a pointer
* to the allocated and initialized flowop, otherwise it returns NULL.
*
* filebench_shm->shm_flowop_lock must be held by caller.
*/
static flowop_t *
flowop_define_common(threadflow_t *threadflow, char *name, flowop_t *inherit,
flowop_t **flowoplist_hdp, int instance, int type)
{
flowop_t *flowop;
if (name == NULL)
return (NULL);
if ((flowop = (flowop_t *)ipc_malloc(FILEBENCH_FLOWOP)) == NULL) {
filebench_log(LOG_ERROR,
"flowop_define: Can't malloc flowop");
return (NULL);
}
filebench_log(LOG_DEBUG_IMPL, "defining flowops %s-%d, addr %zx",
name, instance, flowop);
if (flowop == NULL)
return (NULL);
if (inherit) {
(void) memcpy(flowop, inherit, sizeof (flowop_t));
(void) pthread_mutex_init(&flowop->fo_lock,
ipc_mutexattr(IPC_MUTEX_PRI_ROB));
(void) ipc_mutex_lock(&flowop->fo_lock);
flowop->fo_next = NULL;
flowop->fo_exec_next = NULL;
filebench_log(LOG_DEBUG_IMPL,
"flowop %s-%d calling init", name, instance);
} else {
(void) memset(flowop, 0, sizeof (flowop_t));
flowop->fo_iters = avd_int_alloc(1);
flowop->fo_type = type;
(void) pthread_mutex_init(&flowop->fo_lock,
ipc_mutexattr(IPC_MUTEX_PRI_ROB));
(void) ipc_mutex_lock(&flowop->fo_lock);
}
/* Create backpointer to thread */
flowop->fo_thread = threadflow;
/* Add flowop to global list */
if (filebench_shm->shm_flowoplist == NULL) {
filebench_shm->shm_flowoplist = flowop;
flowop->fo_next = NULL;
} else {
flowop->fo_next = filebench_shm->shm_flowoplist;
filebench_shm->shm_flowoplist = flowop;
}
(void) strcpy(flowop->fo_name, name);
flowop->fo_instance = instance;
if (flowoplist_hdp == NULL)
return (flowop);
/* Add flowop to thread op list */
if (*flowoplist_hdp == NULL) {
*flowoplist_hdp = flowop;
flowop->fo_exec_next = NULL;
} else {
flowop_t *flowend;
/* Find the end of the thread list */
flowend = *flowoplist_hdp;
while (flowend->fo_exec_next != NULL)
flowend = flowend->fo_exec_next;
flowend->fo_exec_next = flowop;
flowop->fo_exec_next = NULL;
}
return (flowop);
}
/*
* Calls flowop_define_common() to allocate and initialize a
* flowop, and holds the shared flowop_lock during the call.
* It releases the created flowop's fo_lock when done.
*/
flowop_t *
flowop_define(threadflow_t *threadflow, char *name, flowop_t *inherit,
flowop_t **flowoplist_hdp, int instance, int type)
{
flowop_t *flowop;
(void) ipc_mutex_lock(&filebench_shm->shm_flowop_lock);
flowop = flowop_define_common(threadflow, name,
inherit, flowoplist_hdp, instance, type);
(void) ipc_mutex_unlock(&filebench_shm->shm_flowop_lock);
if (flowop == NULL)
return (NULL);
(void) ipc_mutex_unlock(&flowop->fo_lock);
return (flowop);
}
/*
* Calls flowop_define_common() to allocate and initialize a
* composite flowop, and holds the shared flowop_lock during the call.
* It releases the created flowop's fo_lock when done.
*/
flowop_t *
flowop_new_composite_define(char *name)
{
flowop_t *flowop;
(void) ipc_mutex_lock(&filebench_shm->shm_flowop_lock);
flowop = flowop_define_common(NULL, name,
NULL, NULL, 0, FLOW_TYPE_COMPOSITE);
(void) ipc_mutex_unlock(&filebench_shm->shm_flowop_lock);
if (flowop == NULL)
return (NULL);
flowop->fo_func = flowop_composite;
flowop->fo_init = flowop_composite_init;
flowop->fo_destruct = flowop_composite_destruct;
(void) ipc_mutex_unlock(&flowop->fo_lock);
return (flowop);
}
/*
* Attempts to take a write lock on the flowop_find_lock that is
* defined in interprocess shared memory. Since each call to
* flowop_start() holds a read lock on flowop_find_lock, this
* routine effectively blocks until all instances of
* flowop_start() have finished. The flowop_find() routine calls
* this routine so that flowops won't be searched for until all
* flowops have been created by flowop_start.
*/
static void
flowop_find_barrier(void)
{
/* Block on wrlock to ensure find waits for all creates */
(void) pthread_rwlock_wrlock(&filebench_shm->shm_flowop_find_lock);
(void) pthread_rwlock_unlock(&filebench_shm->shm_flowop_find_lock);
}
/*
* Returns a list of flowops named "name" from the master
* flowop list.
*/
flowop_t *
flowop_find(char *name)
{
flowop_t *flowop;
flowop_t *result = NULL;