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flowop_library.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.
*
* Portions Copyright 2008 Denis Cheng
*/
#include "config.h"
#include <sys/types.h>
#include <stddef.h>
#include <sys/ipc.h>
#include <sys/sem.h>
#include <sys/errno.h>
#include <sys/time.h>
#include <inttypes.h>
#include <fcntl.h>
#include <math.h>
#include <dirent.h>
#ifndef HAVE_SYSV_SEM
#include <semaphore.h>
#endif /* HAVE_SYSV_SEM */
#include "filebench.h"
#include "flowop.h"
#include "fileset.h"
#include "fb_random.h"
#include "utils.h"
#include "fsplug.h"
/*
* These routines implement the flowops from the f language. Each
* flowop has has a name such as "read", and a set of function pointers
* to call for initialization, execution and destruction of the flowop.
* The table flowoplib_funcs[] contains a flowoplib struct for each
* implemented flowop. Most flowops use a generic initialization function
* and all currently use a generic destruction function. All flowop
* functions referenced from the table are in this file, though, of
* course, they often call functions from other files.
*
* The flowop_init() routine uses the flowoplib_funcs[] table to
* create an initial set of "instance 0" flowops, one for each type of
* flowop, from which all other flowops are derived. These "instance 0"
* flowops are initialized with information from the table including
* pointers for their fo_init, fo_func and fo_destroy functions. When
* a flowop definition is encountered in an f language script, the
* "type" of flowop, such as "read" is used to search for the
* "instance 0" flowop named "read", then a new flowop is allocated
* which inherits its function pointers and other initial properties
* from the instance 0 flowop, and is given a new name as specified
* by the "name=" attribute.
*/
static void flowoplib_destruct_noop(flowop_t *flowop);
static int flowoplib_fdnum(threadflow_t *threadflow, flowop_t *flowop);
static int flowoplib_print(threadflow_t *threadflow, flowop_t *flowop);
static int flowoplib_write(threadflow_t *threadflow, flowop_t *flowop);
static int flowoplib_read(threadflow_t *threadflow, flowop_t *flowop);
static int flowoplib_block_init(flowop_t *flowop);
static int flowoplib_block(threadflow_t *threadflow, flowop_t *flowop);
static int flowoplib_wakeup(threadflow_t *threadflow, flowop_t *flowop);
static int flowoplib_hog(threadflow_t *threadflow, flowop_t *flowop);
static int flowoplib_delay(threadflow_t *threadflow, flowop_t *flowop);
static int flowoplib_sempost(threadflow_t *threadflow, flowop_t *flowop);
static int flowoplib_sempost_init(flowop_t *flowop);
static int flowoplib_semblock(threadflow_t *threadflow, flowop_t *flowop);
static int flowoplib_semblock_init(flowop_t *flowop);
static void flowoplib_semblock_destruct(flowop_t *flowop);
static int flowoplib_eventlimit(threadflow_t *, flowop_t *flowop);
static int flowoplib_bwlimit(threadflow_t *, flowop_t *flowop);
static int flowoplib_iopslimit(threadflow_t *, flowop_t *flowop);
static int flowoplib_opslimit(threadflow_t *, flowop_t *flowop);
static int flowoplib_openfile(threadflow_t *, flowop_t *flowop);
static int flowoplib_openfile_common(threadflow_t *, flowop_t *flowop, int fd);
static int flowoplib_createfile(threadflow_t *, flowop_t *flowop);
static int flowoplib_closefile(threadflow_t *, flowop_t *flowop);
static int flowoplib_makedir(threadflow_t *, flowop_t *flowop);
static int flowoplib_removedir(threadflow_t *, flowop_t *flowop);
static int flowoplib_listdir(threadflow_t *, flowop_t *flowop);
static int flowoplib_fsync(threadflow_t *, flowop_t *flowop);
static int flowoplib_readwholefile(threadflow_t *, flowop_t *flowop);
static int flowoplib_writewholefile(threadflow_t *, flowop_t *flowop);
static int flowoplib_appendfile(threadflow_t *threadflow, flowop_t *flowop);
static int flowoplib_appendfilerand(threadflow_t *threadflow, flowop_t *flowop);
static int flowoplib_deletefile(threadflow_t *threadflow, flowop_t *flowop);
static int flowoplib_statfile(threadflow_t *threadflow, flowop_t *flowop);
static int flowoplib_finishoncount(threadflow_t *threadflow, flowop_t *flowop);
static int flowoplib_finishonbytes(threadflow_t *threadflow, flowop_t *flowop);
static int flowoplib_fsyncset(threadflow_t *threadflow, flowop_t *flowop);
static int flowoplib_testrandvar(threadflow_t *threadflow, flowop_t *flowop);
static int flowoplib_testrandvar_init(flowop_t *flowop);
static void flowoplib_testrandvar_destruct(flowop_t *flowop);
static flowop_proto_t flowoplib_funcs[] = {
{FLOW_TYPE_IO, FLOW_ATTR_WRITE, "write", flowop_init_generic,
flowoplib_write, flowop_destruct_generic},
{FLOW_TYPE_IO, FLOW_ATTR_READ, "read", flowop_init_generic,
flowoplib_read, flowop_destruct_generic},
{FLOW_TYPE_SYNC, 0, "block", flowoplib_block_init,
flowoplib_block, flowop_destruct_generic},
{FLOW_TYPE_SYNC, 0, "wakeup", flowop_init_generic,
flowoplib_wakeup, flowop_destruct_generic},
{FLOW_TYPE_SYNC, 0, "semblock", flowoplib_semblock_init,
flowoplib_semblock, flowoplib_semblock_destruct},
{FLOW_TYPE_SYNC, 0, "sempost", flowoplib_sempost_init,
flowoplib_sempost, flowoplib_destruct_noop},
{FLOW_TYPE_OTHER, 0, "hog", flowop_init_generic,
flowoplib_hog, flowop_destruct_generic},
{FLOW_TYPE_OTHER, 0, "delay", flowop_init_generic,
flowoplib_delay, flowop_destruct_generic},
{FLOW_TYPE_OTHER, 0, "eventlimit", flowop_init_generic,
flowoplib_eventlimit, flowop_destruct_generic},
{FLOW_TYPE_OTHER, 0, "bwlimit", flowop_init_generic,
flowoplib_bwlimit, flowop_destruct_generic},
{FLOW_TYPE_OTHER, 0, "iopslimit", flowop_init_generic,
flowoplib_iopslimit, flowop_destruct_generic},
{FLOW_TYPE_OTHER, 0, "opslimit", flowop_init_generic,
flowoplib_opslimit, flowop_destruct_generic},
{FLOW_TYPE_OTHER, 0, "finishoncount", flowop_init_generic,
flowoplib_finishoncount, flowop_destruct_generic},
{FLOW_TYPE_OTHER, 0, "finishonbytes", flowop_init_generic,
flowoplib_finishonbytes, flowop_destruct_generic},
{FLOW_TYPE_IO, 0, "openfile", flowop_init_generic,
flowoplib_openfile, flowop_destruct_generic},
{FLOW_TYPE_IO, 0, "createfile", flowop_init_generic,
flowoplib_createfile, flowop_destruct_generic},
{FLOW_TYPE_IO, 0, "closefile", flowop_init_generic,
flowoplib_closefile, flowop_destruct_generic},
{FLOW_TYPE_IO, 0, "makedir", flowop_init_generic,
flowoplib_makedir, flowop_destruct_generic},
{FLOW_TYPE_IO, 0, "removedir", flowop_init_generic,
flowoplib_removedir, flowop_destruct_generic},
{FLOW_TYPE_IO, 0, "listdir", flowop_init_generic,
flowoplib_listdir, flowop_destruct_generic},
{FLOW_TYPE_IO, 0, "fsync", flowop_init_generic,
flowoplib_fsync, flowop_destruct_generic},
{FLOW_TYPE_IO, 0, "fsyncset", flowop_init_generic,
flowoplib_fsyncset, flowop_destruct_generic},
{FLOW_TYPE_IO, 0, "statfile", flowop_init_generic,
flowoplib_statfile, flowop_destruct_generic},
{FLOW_TYPE_IO, FLOW_ATTR_READ, "readwholefile", flowop_init_generic,
flowoplib_readwholefile, flowop_destruct_generic},
{FLOW_TYPE_IO, FLOW_ATTR_WRITE, "appendfile", flowop_init_generic,
flowoplib_appendfile, flowop_destruct_generic},
{FLOW_TYPE_IO, FLOW_ATTR_WRITE, "appendfilerand", flowop_init_generic,
flowoplib_appendfilerand, flowop_destruct_generic},
{FLOW_TYPE_IO, 0, "deletefile", flowop_init_generic,
flowoplib_deletefile, flowop_destruct_generic},
{FLOW_TYPE_IO, FLOW_ATTR_WRITE, "writewholefile", flowop_init_generic,
flowoplib_writewholefile, flowop_destruct_generic},
{FLOW_TYPE_OTHER, 0, "print", flowop_init_generic,
flowoplib_print, flowop_destruct_generic},
/* routine to calculate mean and stddev for output from a randvar */
{FLOW_TYPE_OTHER, 0, "testrandvar", flowoplib_testrandvar_init,
flowoplib_testrandvar, flowoplib_testrandvar_destruct}
};
/*
* Loops through the list of flowops defined in this
* module, and creates and initializes a flowop for each one
* by calling flowop_flow_init. As a side effect of calling
* flowop_flow_init, the created flowops are placed on the
* master flowop list. All created flowops are set to
* instance "0".
*/
void
flowoplib_flowinit()
{
int nops = sizeof (flowoplib_funcs) / sizeof (flowop_proto_t);
flowop_flow_init(flowoplib_funcs, nops);
}
/*
* Special total noop destruct
*/
/* ARGSUSED */
static void
flowoplib_destruct_noop(flowop_t *flowop)
{
}
/*
* Generates a file attribute from flags in the supplied flowop.
* Sets FLOW_ATTR_DIRECTIO and/or FLOW_ATTR_DSYNC and advise for
* no random read (POSIX_FADV_RANDOM) as needed.
*/
static int
flowoplib_fileattrs(flowop_t *flowop)
{
int attrs = 0;
if (avd_get_bool(flowop->fo_directio))
attrs |= FLOW_ATTR_DIRECTIO;
if (avd_get_bool(flowop->fo_dsync))
attrs |= FLOW_ATTR_DSYNC;
if (avd_get_bool(flowop->fo_noreadahead))
attrs |= FLOW_ATTR_FADV_RANDOM;
return (attrs);
}
/*
* Obtain a filesetentry for a file. Result placed where filep points.
* Supply with a flowop and a flag to indicate whether an existent or
* non-existent file is required. Returns FILEBENCH_NORSC if all out
* of the appropriate type of directories, FILEBENCH_ERROR if the
* flowop does not point to a fileset, and FILEBENCH_OK otherwise.
*/
static int
flowoplib_pickfile(filesetentry_t **filep, flowop_t *flowop, int flags, int tid)
{
fileset_t *fileset;
int fileindex;
if ((fileset = flowop->fo_fileset) == NULL) {
filebench_log(LOG_ERROR, "flowop NO fileset");
return (FILEBENCH_ERROR);
}
if (flowop->fo_fileindex) {
fileindex = (int)(avd_get_dbl(flowop->fo_fileindex) *
((double)(fileset->fs_constentries / 2)));
fileindex = fileindex % fileset->fs_constentries;
flags |= FILESET_PICKBYINDEX;
} else {
fileindex = 0;
}
if ((*filep = fileset_pick(fileset, FILESET_PICKFILE | flags,
tid, fileindex)) == NULL) {
filebench_log(LOG_DEBUG_SCRIPT,
"flowop %s failed to pick file from fileset %s",
flowop->fo_name,
avd_get_str(fileset->fs_name));
return (FILEBENCH_NORSC);
}
return (FILEBENCH_OK);
}
/*
* Obtain a filesetentry for a leaf directory. Result placed where dirp
* points. Supply with flowop and a flag to indicate whether an existent
* or non-existent leaf directory is required. Returns FILEBENCH_NORSC
* if all out of the appropriate type of directories, FILEBENCH_ERROR
* if the flowop does not point to a fileset, and FILEBENCH_OK otherwise.
*/
static int
flowoplib_pickleafdir(filesetentry_t **dirp, flowop_t *flowop, int flags)
{
fileset_t *fileset;
int dirindex;
if ((fileset = flowop->fo_fileset) == NULL) {
filebench_log(LOG_ERROR, "flowop NO fileset");
return (FILEBENCH_ERROR);
}
if (flowop->fo_fileindex) {
dirindex = (int)(avd_get_dbl(flowop->fo_fileindex) *
((double)(fileset->fs_constleafdirs / 2)));
dirindex = dirindex % fileset->fs_constleafdirs;
flags |= FILESET_PICKBYINDEX;
} else {
dirindex = 0;
}
if ((*dirp = fileset_pick(fileset,
FILESET_PICKLEAFDIR | flags, 0, dirindex)) == NULL) {
filebench_log(LOG_DEBUG_SCRIPT,
"flowop %s failed to pick directory from fileset %s",
flowop->fo_name,
avd_get_str(fileset->fs_name));
return (FILEBENCH_NORSC);
}
return (FILEBENCH_OK);
}
/*
* Searches for a file descriptor. Tries the flowop's
* fo_fdnumber first and returns with it if it has been
* explicitly set (greater than 0). It next checks to
* see if a rotating file descriptor policy is in effect,
* and if not returns the fdnumber regardless of what
* it is. (note that if it is 0, it just selects to the
* default file descriptor in the threadflow's tf_fd
* array). If the rotating fd policy is in effect, it
* cycles from the end of the tf_fd array to one location
* beyond the maximum needed by the number of entries in
* the associated fileset on each invocation, then starts
* over from the end.
*
* The routine returns an index into the threadflow's
* tf_fd table where the actual file descriptor will be
* found. Note: the calling routine must not call this
* routine if the flowop does not have a fileset, and the
* flowop's fo_fdnumber is zero and fo_rotatefd is
* asserted, or an addressing fault may occur.
*/
static int
flowoplib_fdnum(threadflow_t *threadflow, flowop_t *flowop)
{
fbint_t entries;
int fdnumber = flowop->fo_fdnumber;
/* If the script sets the fd explicitly */
if (fdnumber > 0)
return (fdnumber);
/* If the flowop defaults to persistent fd */
if (!avd_get_bool(flowop->fo_rotatefd))
return (fdnumber);
if (flowop->fo_fileset == NULL) {
filebench_log(LOG_ERROR, "flowop NULL file");
return (FILEBENCH_ERROR);
}
entries = flowop->fo_fileset->fs_constentries;
/* Rotate the fd on each flowop invocation */
if (entries > (THREADFLOW_MAXFD / 2)) {
filebench_log(LOG_ERROR, "Out of file descriptors in flowop %s"
" (too many files : %llu",
flowop->fo_name, (u_longlong_t)entries);
return (FILEBENCH_ERROR);
}
/* First time around */
if (threadflow->tf_fdrotor == 0)
threadflow->tf_fdrotor = THREADFLOW_MAXFD;
/* One fd for every file in the set */
if (entries == (THREADFLOW_MAXFD - threadflow->tf_fdrotor))
threadflow->tf_fdrotor = THREADFLOW_MAXFD;
threadflow->tf_fdrotor--;
filebench_log(LOG_DEBUG_IMPL, "selected fd = %d",
threadflow->tf_fdrotor);
return (threadflow->tf_fdrotor);
}
/*
* Determines the file descriptor to use, and attempts to open
* the file if it is not already open. Also determines the wss
* value. Returns FILEBENCH_ERROR on errors, FILESET_NORSC if
* if flowop_openfile_common couldn't obtain an appropriate file
* from a the fileset, and FILEBENCH_OK otherwise.
*/
static int
flowoplib_filesetup(threadflow_t *threadflow, flowop_t *flowop,
fbint_t *wssp, fb_fdesc_t **fdescp)
{
int fd = flowoplib_fdnum(threadflow, flowop);
if (fd == -1)
return (FILEBENCH_ERROR);
/* check for conflicting fdnumber and file name */
if ((fd > 0) && (threadflow->tf_fse[fd] != NULL)) {
char *fd_based_name;
fd_based_name =
avd_get_str(threadflow->tf_fse[fd]->fse_fileset->fs_name);
if (flowop->fo_filename != NULL) {
char *fo_based_name;
fo_based_name = avd_get_str(flowop->fo_filename);
if (strcmp(fd_based_name, fo_based_name) != 0) {
filebench_log(LOG_ERROR, "Name of fd refer"
"enced fileset name (%s) CONFLICTS with"
" flowop supplied fileset name (%s)",
fd_based_name, fo_based_name);
filebench_shutdown(1);
return (FILEBENCH_ERROR);
}
}
}
if (threadflow->tf_fd[fd].fd_ptr == NULL) {
int ret;
if ((ret = flowoplib_openfile_common(
threadflow, flowop, fd)) != FILEBENCH_OK)
return (ret);
if (threadflow->tf_fse[fd]) {
filebench_log(LOG_DEBUG_IMPL, "opened file %s",
threadflow->tf_fse[fd]->fse_path);
} else {
filebench_log(LOG_DEBUG_IMPL,
"opened device %s/%s",
avd_get_str(flowop->fo_fileset->fs_path),
avd_get_str(flowop->fo_fileset->fs_name));
}
}
*fdescp = &(threadflow->tf_fd[fd]);
if ((*wssp = flowop->fo_constwss) == 0) {
if (threadflow->tf_fse[fd])
*wssp = threadflow->tf_fse[fd]->fse_size;
else
*wssp = avd_get_int(flowop->fo_fileset->fs_size);
}
return (FILEBENCH_OK);
}
/*
* Determines the io buffer or random offset into tf_mem for
* the IO operation. Returns FILEBENCH_ERROR on errors, FILEBENCH_OK otherwise.
*/
static int
flowoplib_iobufsetup(threadflow_t *threadflow, flowop_t *flowop,
caddr_t *iobufp, fbint_t iosize)
{
long memsize;
size_t memoffset;
if (iosize == 0) {
filebench_log(LOG_ERROR, "zero iosize for thread %s",
flowop->fo_name);
return (FILEBENCH_ERROR);
}
/* If directio, we need to align buffer address by sector */
if (flowoplib_fileattrs(flowop) & FLOW_ATTR_DIRECTIO)
iosize = iosize + 512;
if ((memsize = threadflow->tf_constmemsize) != 0) {
/* use tf_mem for I/O with random offset */
if (memsize < iosize) {
filebench_log(LOG_ERROR,
"tf_memsize smaller than IO size for thread %s",
flowop->fo_name);
return (FILEBENCH_ERROR);
}
fb_urandom(&memoffset, memsize, iosize, NULL);
*iobufp = threadflow->tf_mem + memoffset;
} else {
/* use private I/O buffer */
if ((flowop->fo_buf != NULL) &&
(flowop->fo_buf_size < iosize)) {
/* too small, so free up and re-allocate */
free(flowop->fo_buf);
flowop->fo_buf = NULL;
}
/*
* Allocate memory for the buffer. The memory is freed
* by flowop_destruct_generic() or by this routine if more
* memory is needed for the buffer.
*/
if ((flowop->fo_buf == NULL) && ((flowop->fo_buf
= (char *)malloc(iosize)) == NULL))
return (FILEBENCH_ERROR);
flowop->fo_buf_size = iosize;
*iobufp = flowop->fo_buf;
}
if (flowoplib_fileattrs(flowop) & FLOW_ATTR_DIRECTIO)
*iobufp = (caddr_t)((((unsigned long)(*iobufp)) / 512) * 512);
return (FILEBENCH_OK);
}
/*
* Determines the file descriptor to use, opens it if necessary, the
* io buffer or random offset into tf_mem for IO operation and the wss
* value. Returns FILEBENCH_ERROR on errors, FILEBENCH_OK otherwise.
*/
int
flowoplib_iosetup(threadflow_t *threadflow, flowop_t *flowop,
fbint_t *wssp, caddr_t *iobufp, fb_fdesc_t **filedescp, fbint_t iosize)
{
int ret;
if ((ret = flowoplib_filesetup(threadflow, flowop, wssp, filedescp)) !=
FILEBENCH_OK)
return (ret);
if ((ret = flowoplib_iobufsetup(threadflow, flowop, iobufp, iosize)) !=
FILEBENCH_OK)
return (ret);
return (FILEBENCH_OK);
}
/*
* Emulate posix read / pread. If the flowop has a fileset,
* a file descriptor number index is fetched, otherwise a
* supplied fileobj file is used. In either case the specified
* file will be opened if not already open. If the flowop has
* neither a fileset or fileobj, an error is logged and FILEBENCH_ERROR
* returned.
*
* The actual read is done to a random offset in the
* threadflow's thread memory (tf_mem), with a size set by
* fo_iosize and at either a random disk offset within the
* working set size, or at the next sequential location. If
* any errors are encountered, FILEBENCH_ERROR is returned,
* if no appropriate file can be obtained from the fileset then
* FILEBENCH_NORSC is returned, otherise FILEBENCH_OK is returned.
*/
static int
flowoplib_read(threadflow_t *threadflow, flowop_t *flowop)
{
caddr_t iobuf;
fbint_t wss;
fbint_t iosize;
fb_fdesc_t *fdesc;
uint32_t pos_idx;
struct posset *ps;
int ret;
iosize = avd_get_int(flowop->fo_iosize);
if ((ret = flowoplib_iosetup(threadflow, flowop, &wss, &iobuf,
&fdesc, iosize)) != FILEBENCH_OK)
return (ret);
if (avd_get_bool(flowop->fo_random)) {
uint64_t fileoffset;
if (iosize > wss) {
filebench_log(LOG_ERROR,
"file size smaller than IO size for thread %s",
flowop->fo_name);
return (FILEBENCH_ERROR);
}
/* select randomly from a possition set */
if (flowop->fo_posset) {
ps = flowop->fo_posset;
fb_urandom32(&pos_idx,
avd_get_int(ps->ps_entries), 0, NULL);
fileoffset = ps->ps_positions[pos_idx];
} else {
fb_urandom64(&fileoffset, wss, iosize, NULL);
}
(void) flowop_beginop(threadflow, flowop);
if ((ret = FB_PREAD(fdesc, iobuf,
iosize, (off64_t)fileoffset)) == -1) {
(void) flowop_endop(threadflow, flowop, 0);
filebench_log(LOG_ERROR,
"read file %s failed, offset %llu "
"io buffer %zd: %s",
avd_get_str(flowop->fo_fileset->fs_name),
(u_longlong_t)fileoffset, iobuf, strerror(errno));
flowop_endop(threadflow, flowop, 0);
return (FILEBENCH_ERROR);
}
(void) flowop_endop(threadflow, flowop, ret);
if ((ret == 0))
(void) FB_LSEEK(fdesc, 0, SEEK_SET);
} else {
(void) flowop_beginop(threadflow, flowop);
if ((ret = FB_READ(fdesc, iobuf, iosize)) == -1) {
(void) flowop_endop(threadflow, flowop, 0);
filebench_log(LOG_ERROR,
"read file %s failed, io buffer %zd: %s",
avd_get_str(flowop->fo_fileset->fs_name),
iobuf, strerror(errno));
(void) flowop_endop(threadflow, flowop, 0);
return (FILEBENCH_ERROR);
}
(void) flowop_endop(threadflow, flowop, ret);
if ((ret == 0))
(void) FB_LSEEK(fdesc, 0, SEEK_SET);
}
return (FILEBENCH_OK);
}
/*
* Initializes a "flowop_block" flowop. Specifically, it
* initializes the flowop's fo_cv and unlocks the fo_lock.
*/
static int
flowoplib_block_init(flowop_t *flowop)
{
filebench_log(LOG_DEBUG_IMPL, "flow %s-%d block init address %zx",
flowop->fo_name, flowop->fo_instance, &flowop->fo_cv);
(void) pthread_cond_init(&flowop->fo_cv, ipc_condattr());
(void) ipc_mutex_unlock(&flowop->fo_lock);
return (FILEBENCH_OK);
}
/*
* Blocks the threadflow until woken up by flowoplib_wakeup.
* The routine blocks on the flowop's fo_cv condition variable.
*/
static int
flowoplib_block(threadflow_t *threadflow, flowop_t *flowop)
{
filebench_log(LOG_DEBUG_IMPL, "flow %s-%d blocking at address %zx",
flowop->fo_name, flowop->fo_instance, &flowop->fo_cv);
(void) ipc_mutex_lock(&flowop->fo_lock);
flowop_beginop(threadflow, flowop);
(void) pthread_cond_wait(&flowop->fo_cv, &flowop->fo_lock);
flowop_endop(threadflow, flowop, 0);
filebench_log(LOG_DEBUG_IMPL, "flow %s-%d unblocking",
flowop->fo_name, flowop->fo_instance);
(void) ipc_mutex_unlock(&flowop->fo_lock);
return (FILEBENCH_OK);
}
/*
* Wakes up one or more target blocking flowops.
* Sends broadcasts on the fo_cv condition variables of all
* flowops on the target list, except those that are
* FLOW_MASTER flowops. The target list consists of all
* flowops whose name matches this flowop's "fo_targetname"
* attribute. The target list is generated on the first
* invocation, and the run will be shutdown if no targets
* are found. Otherwise the routine always returns FILEBENCH_OK.
*/
static int
flowoplib_wakeup(threadflow_t *threadflow, flowop_t *flowop)
{
flowop_t *target;
/* if this is the first wakeup, create the wakeup list */
if (flowop->fo_targets == NULL) {
flowop_t *result = flowop_find(flowop->fo_targetname);
flowop->fo_targets = result;
if (result == NULL) {
filebench_log(LOG_ERROR,
"wakeup: could not find op %s for thread %s",
flowop->fo_targetname,
threadflow->tf_name);
filebench_shutdown(1);
}
while (result) {
result->fo_targetnext =
result->fo_resultnext;
result = result->fo_resultnext;
}
}
target = flowop->fo_targets;
/* wakeup the targets */
while (target) {
if (target->fo_instance == FLOW_MASTER) {
target = target->fo_targetnext;
continue;
}
filebench_log(LOG_DEBUG_IMPL,
"wakeup flow %s-%d at address %zx",
target->fo_name,
target->fo_instance,
&target->fo_cv);
flowop_beginop(threadflow, flowop);
(void) ipc_mutex_lock(&target->fo_lock);
(void) pthread_cond_broadcast(&target->fo_cv);
(void) ipc_mutex_unlock(&target->fo_lock);
flowop_endop(threadflow, flowop, 0);
target = target->fo_targetnext;
}
return (FILEBENCH_OK);
}
/*
* "think time" routines. the "hog" routine consumes cpu cycles as
* it "thinks", while the "delay" flowop simply calls sleep() to delay
* for a given number of seconds without consuming cpu cycles.
*/
/*
* Consumes CPU cycles and memory bandwidth by looping for
* flowop->fo_value times. With each loop sets memory location
* threadflow->tf_mem to 1.
*/
static int
flowoplib_hog(threadflow_t *threadflow, flowop_t *flowop)
{
uint64_t value = avd_get_int(flowop->fo_value);
int i;
filebench_log(LOG_DEBUG_IMPL, "hog enter");
flowop_beginop(threadflow, flowop);
if (threadflow->tf_mem != NULL) {
for (i = 0; i < value; i++)
*(threadflow->tf_mem) = 1;
}
flowop_endop(threadflow, flowop, 0);
filebench_log(LOG_DEBUG_IMPL, "hog exit");
return (FILEBENCH_OK);
}
/*
* Delays for fo_value seconds.
*/
static int
flowoplib_delay(threadflow_t *threadflow, flowop_t *flowop)
{
int value = avd_get_int(flowop->fo_value);
flowop_beginop(threadflow, flowop);
(void) sleep(value);
flowop_endop(threadflow, flowop, 0);
return (FILEBENCH_OK);
}
/*
* Rate limiting routines. This is the event consuming half of the
* event system. Each of the four following routines will limit the rate
* to one unit of either calls, issued I/O operations, issued filebench
* operations, or I/O bandwidth. Since there is only one event generator,
* the events will be divided amoung multiple instances of an event
* consumer, and further divided among different consumers if more than
* one has been defined. There is no mechanism to enforce equal sharing
* of events.
*/
/*
* Completes one invocation per posted event. If eventgen_q
* has an event count greater than zero, one will be removed
* (count decremented), otherwise the calling thread will
* block until another event has been posted. Always returns 0
*/
static int
flowoplib_eventlimit(threadflow_t *threadflow, flowop_t *flowop)
{
/* Immediately bail if not set/enabled */
if (!filebench_shm->shm_eventgen_enabled)
return (FILEBENCH_OK);
if (flowop->fo_initted == 0) {
filebench_log(LOG_DEBUG_IMPL, "rate %zx %s-%d locking",
flowop, threadflow->tf_name, threadflow->tf_instance);
flowop->fo_initted = 1;
}
flowop_beginop(threadflow, flowop);
while (filebench_shm->shm_eventgen_enabled) {
(void) ipc_mutex_lock(&filebench_shm->shm_eventgen_lock);
if (filebench_shm->shm_eventgen_q > 0) {
filebench_shm->shm_eventgen_q--;
(void) ipc_mutex_unlock(
&filebench_shm->shm_eventgen_lock);
break;
}
(void) pthread_cond_wait(&filebench_shm->shm_eventgen_cv,
&filebench_shm->shm_eventgen_lock);
(void) ipc_mutex_unlock(&filebench_shm->shm_eventgen_lock);
}
flowop_endop(threadflow, flowop, 0);
return (FILEBENCH_OK);
}
static int
flowoplib_event_find_target(threadflow_t *threadflow, flowop_t *flowop)
{
if (flowop->fo_targetname[0] != '\0') {
/* Try to use statistics from specific flowop */
flowop->fo_targets =
flowop_find_from_list(flowop->fo_targetname,
threadflow->tf_thrd_fops);
if (flowop->fo_targets == NULL) {
filebench_log(LOG_ERROR,
"limit target: could not find flowop %s",
flowop->fo_targetname);
filebench_shutdown(1);
return (FILEBENCH_ERROR);
}
} else {
/* use total workload statistics */
flowop->fo_targets = NULL;
}
return (FILEBENCH_OK);
}
/*
* Blocks the calling thread if the number of issued I/O
* operations exceeds the number of posted events, thus
* limiting the average I/O operation rate to the rate
* specified by eventgen_hz. Always returns FILEBENCH_OK.
*/
static int
flowoplib_iopslimit(threadflow_t *threadflow, flowop_t *flowop)
{
uint64_t iops;
uint64_t delta;
uint64_t events;
/* Immediately bail if not set/enabled */
if (!filebench_shm->shm_eventgen_enabled)
return (FILEBENCH_OK);
if (flowop->fo_initted == 0) {
filebench_log(LOG_DEBUG_IMPL, "rate %zx %s-%d locking",
flowop, threadflow->tf_name, threadflow->tf_instance);
flowop->fo_initted = 1;
if (flowoplib_event_find_target(threadflow, flowop)
== FILEBENCH_ERROR)
return (FILEBENCH_ERROR);
if (flowop->fo_targets && ((flowop->fo_targets->fo_attrs &
(FLOW_ATTR_READ | FLOW_ATTR_WRITE)) == 0)) {
filebench_log(LOG_ERROR,
"WARNING: Flowop %s does no IO",
flowop->fo_targets->fo_name);
filebench_shutdown(1);
return (FILEBENCH_ERROR);
}
}
if (flowop->fo_targets) {
/*
* Note that fs_count is already the sum of fs_rcount
* and fs_wcount if looking at a single flowop.
*/
iops = flowop->fo_targets->fo_stats.fs_count;
} else {
(void) ipc_mutex_lock(&controlstats_lock);
iops = (controlstats.fs_rcount +
controlstats.fs_wcount);
(void) ipc_mutex_unlock(&controlstats_lock);
}
/* Is this the first time around */
if (flowop->fo_tputlast == 0) {
flowop->fo_tputlast = iops;
return (FILEBENCH_OK);
}
delta = iops - flowop->fo_tputlast;
flowop->fo_tputbucket -= delta;
flowop->fo_tputlast = iops;
/* No need to block if the q isn't empty */
if (flowop->fo_tputbucket >= 0LL) {
flowop_endop(threadflow, flowop, 0);
return (FILEBENCH_OK);
}
iops = flowop->fo_tputbucket * -1;
events = iops;
flowop_beginop(threadflow, flowop);
while (filebench_shm->shm_eventgen_enabled) {
(void) ipc_mutex_lock(&filebench_shm->shm_eventgen_lock);
if (filebench_shm->shm_eventgen_q >= events) {
filebench_shm->shm_eventgen_q -= events;
(void) ipc_mutex_unlock(
&filebench_shm->shm_eventgen_lock);
flowop->fo_tputbucket += events;
break;
}
(void) pthread_cond_wait(&filebench_shm->shm_eventgen_cv,
&filebench_shm->shm_eventgen_lock);
(void) ipc_mutex_unlock(&filebench_shm->shm_eventgen_lock);
}
flowop_endop(threadflow, flowop, 0);
return (FILEBENCH_OK);
}
/*
* Blocks the calling thread if the number of issued filebench
* operations exceeds the number of posted events, thus limiting
* the average filebench operation rate to the rate specified by
* eventgen_hz. Always returns FILEBENCH_OK.
*/
static int
flowoplib_opslimit(threadflow_t *threadflow, flowop_t *flowop)
{
uint64_t ops;
uint64_t delta;
uint64_t events;
/* Immediately bail if not set/enabled */
if (!filebench_shm->shm_eventgen_enabled)
return (FILEBENCH_OK);
if (flowop->fo_initted == 0) {
filebench_log(LOG_DEBUG_IMPL, "rate %zx %s-%d locking",
flowop, threadflow->tf_name, threadflow->tf_instance);
flowop->fo_initted = 1;
if (flowoplib_event_find_target(threadflow, flowop)
== FILEBENCH_ERROR)
return (FILEBENCH_ERROR);
}
if (flowop->fo_targets) {
ops = flowop->fo_targets->fo_stats.fs_count;
} else {
(void) ipc_mutex_lock(&controlstats_lock);
ops = controlstats.fs_count;
(void) ipc_mutex_unlock(&controlstats_lock);
}
/* Is this the first time around */
if (flowop->fo_tputlast == 0) {
flowop->fo_tputlast = ops;
return (FILEBENCH_OK);
}
delta = ops - flowop->fo_tputlast;
flowop->fo_tputbucket -= delta;
flowop->fo_tputlast = ops;
/* No need to block if the q isn't empty */
if (flowop->fo_tputbucket >= 0LL) {
flowop_endop(threadflow, flowop, 0);
return (FILEBENCH_OK);
}
ops = flowop->fo_tputbucket * -1;
events = ops;
flowop_beginop(threadflow, flowop);
while (filebench_shm->shm_eventgen_enabled) {
(void) ipc_mutex_lock(&filebench_shm->shm_eventgen_lock);
if (filebench_shm->shm_eventgen_q >= events) {
filebench_shm->shm_eventgen_q -= events;
(void) ipc_mutex_unlock(
&filebench_shm->shm_eventgen_lock);
flowop->fo_tputbucket += events;
break;
}
(void) pthread_cond_wait(&filebench_shm->shm_eventgen_cv,
&filebench_shm->shm_eventgen_lock);
(void) ipc_mutex_unlock(&filebench_shm->shm_eventgen_lock);
}
flowop_endop(threadflow, flowop, 0);
return (FILEBENCH_OK);
}
/*
* Blocks the calling thread if the number of bytes of I/O
* issued exceeds one megabyte times the number of posted
* events, thus limiting the average I/O byte rate to one
* megabyte times the event rate as set by eventgen_hz.
* Always retuns FILEBENCH_OK.
*/
static int
flowoplib_bwlimit(threadflow_t *threadflow, flowop_t *flowop)
{
uint64_t bytes;
uint64_t delta;
uint64_t events;
/* Immediately bail if not set/enabled */
if (!filebench_shm->shm_eventgen_enabled)