+/*
+ * Code related to writing an iolog of what a thread is doing, and to
+ * later read that back and replay
+ */
#include <stdio.h>
#include <stdlib.h>
+#include <assert.h>
#include "list.h"
#include "fio.h"
-void write_iolog_put(struct thread_data *td, struct io_u *io_u)
+static const char iolog_ver2[] = "fio version 2 iolog";
+
+void queue_io_piece(struct thread_data *td, struct io_piece *ipo)
+{
+ list_add_tail(&ipo->list, &td->io_log_list);
+ td->total_io_size += ipo->len;
+}
+
+void log_io_u(struct thread_data *td, struct io_u *io_u)
+{
+ const char *act[] = { "read", "write", "sync" };
+
+ assert(io_u->ddir < 3);
+
+ if (!td->o.write_iolog_file)
+ return;
+
+ fprintf(td->iolog_f, "%s %s %llu %lu\n", io_u->file->file_name,
+ act[io_u->ddir], io_u->offset,
+ io_u->buflen);
+}
+
+void log_file(struct thread_data *td, struct fio_file *f,
+ enum file_log_act what)
+{
+ const char *act[] = { "add", "open", "close" };
+
+ assert(what < 3);
+
+ if (!td->o.write_iolog_file)
+ return;
+
+ fprintf(td->iolog_f, "%s %s\n", f->file_name, act[what]);
+}
+
+static void iolog_delay(struct thread_data *td, unsigned long delay)
{
- fprintf(td->iolog_f, "%d,%llu,%u\n", io_u->ddir, io_u->offset, io_u->buflen);
+ unsigned long usec = utime_since_now(&td->last_issue);
+
+ if (delay < usec)
+ return;
+
+ delay -= usec;
+
+ /*
+ * less than 100 usec delay, just regard it as noise
+ */
+ if (delay < 100)
+ return;
+
+ usec_sleep(td, delay);
+}
+
+static int ipo_special(struct thread_data *td, struct io_piece *ipo)
+{
+ struct fio_file *f;
+ int ret;
+
+ /*
+ * Not a special ipo
+ */
+ if (ipo->ddir != DDIR_INVAL)
+ return 0;
+
+ f = td->files[ipo->fileno];
+
+ switch (ipo->file_action) {
+ case FIO_LOG_OPEN_FILE:
+ ret = td_io_open_file(td, f);
+ if (!ret) {
+ free(ipo);
+ break;
+ }
+ td_verror(td, ret, "iolog open file");
+ return -1;
+ case FIO_LOG_CLOSE_FILE:
+ td_io_close_file(td, f);
+ break;
+ case FIO_LOG_UNLINK_FILE:
+ unlink(f->file_name);
+ break;
+ default:
+ log_err("fio: bad file action %d\n", ipo->file_action);
+ break;
+ }
+
+ return 1;
}
int read_iolog_get(struct thread_data *td, struct io_u *io_u)
{
struct io_piece *ipo;
- if (!list_empty(&td->io_log_list)) {
+ while (!list_empty(&td->io_log_list)) {
+ int ret;
+
ipo = list_entry(td->io_log_list.next, struct io_piece, list);
list_del(&ipo->list);
+
+ ret = ipo_special(td, ipo);
+ if (ret < 0) {
+ free(ipo);
+ break;
+ } else if (ret > 0) {
+ free(ipo);
+ continue;
+ }
+
io_u->offset = ipo->offset;
io_u->buflen = ipo->len;
io_u->ddir = ipo->ddir;
- io_u->file = ipo->file;
+ io_u->file = td->files[ipo->fileno];
+ get_file(io_u->file);
+
+ dprint(FD_IO, "iolog: get %llu/%lu/%s\n", io_u->offset,
+ io_u->buflen, io_u->file->file_name);
+
+ if (ipo->delay)
+ iolog_delay(td, ipo->delay);
+
free(ipo);
return 0;
}
+ td->done = 1;
return 1;
}
void prune_io_piece_log(struct thread_data *td)
{
struct io_piece *ipo;
+ struct rb_node *n;
+
+ while ((n = rb_first(&td->io_hist_tree)) != NULL) {
+ ipo = rb_entry(n, struct io_piece, rb_node);
+ rb_erase(n, &td->io_hist_tree);
+ free(ipo);
+ }
while (!list_empty(&td->io_hist_list)) {
ipo = list_entry(td->io_hist_list.next, struct io_piece, list);
-
list_del(&ipo->list);
free(ipo);
}
}
/*
- * log a succesful write, so we can unwind the log for verify
+ * log a successful write, so we can unwind the log for verify
*/
void log_io_piece(struct thread_data *td, struct io_u *io_u)
{
- struct io_piece *ipo = malloc(sizeof(struct io_piece));
- struct list_head *entry;
+ struct rb_node **p, *parent;
+ struct io_piece *ipo, *__ipo;
- INIT_LIST_HEAD(&ipo->list);
+ ipo = malloc(sizeof(struct io_piece));
ipo->file = io_u->file;
ipo->offset = io_u->offset;
ipo->len = io_u->buflen;
/*
- * for random io where the writes extend the file, it will typically
- * be laid out with the block scattered as written. it's faster to
- * read them in in that order again, so don't sort
+ * We don't need to sort the entries, if:
+ *
+ * Sequential writes, or
+ * Random writes that lay out the file as it goes along
+ *
+ * For both these cases, just reading back data in the order we
+ * wrote it out is the fastest.
*/
- if (td->sequential || !td->overwrite) {
+ if (!td_random(td) || !td->o.overwrite) {
+ INIT_LIST_HEAD(&ipo->list);
list_add_tail(&ipo->list, &td->io_hist_list);
return;
}
+ RB_CLEAR_NODE(&ipo->rb_node);
+ p = &td->io_hist_tree.rb_node;
+ parent = NULL;
+
/*
- * for random io, sort the list so verify will run faster
+ * Sort the entry into the verification list
*/
- entry = &td->io_hist_list;
- while ((entry = entry->prev) != &td->io_hist_list) {
- struct io_piece *__ipo = list_entry(entry, struct io_piece, list);
-
- if (__ipo->offset < ipo->offset)
- break;
+ while (*p) {
+ parent = *p;
+
+ __ipo = rb_entry(parent, struct io_piece, rb_node);
+ if (ipo->offset <= __ipo->offset)
+ p = &(*p)->rb_left;
+ else
+ p = &(*p)->rb_right;
}
- list_add(&ipo->list, entry);
+ rb_link_node(&ipo->rb_node, parent, p);
+ rb_insert_color(&ipo->rb_node, &td->io_hist_tree);
}
void write_iolog_close(struct thread_data *td)
fflush(td->iolog_f);
fclose(td->iolog_f);
free(td->iolog_buf);
+ td->iolog_f = NULL;
+ td->iolog_buf = NULL;
}
/*
- * Open a stored log and read in the entries.
+ * Read version 2 iolog data. It is enhanced to include per-file logging,
+ * syncs, etc.
*/
-static int init_iolog_read(struct thread_data *td)
+static int read_iolog2(struct thread_data *td, FILE *f)
{
unsigned long long offset;
unsigned int bytes;
+ int reads, writes, fileno = 0, file_action = 0; /* stupid gcc */
+ char *fname, *act;
char *str, *p;
- FILE *f;
- int rw, reads, writes;
+ enum fio_ddir rw;
- f = fopen(td->read_iolog_file, "r");
- if (!f) {
- perror("fopen read iolog");
- return 1;
- }
+ free_release_files(td);
/*
* Read in the read iolog and store it, reuse the infrastructure
* for doing verifications.
*/
str = malloc(4096);
+ fname = malloc(256+16);
+ act = malloc(256+16);
+
reads = writes = 0;
while ((p = fgets(str, 4096, f)) != NULL) {
struct io_piece *ipo;
-
- if (sscanf(p, "%d,%llu,%u", &rw, &offset, &bytes) != 3) {
- log_err("bad iolog: %s\n", p);
+ int r;
+
+ r = sscanf(p, "%256s %256s %llu %u", fname, act, &offset,
+ &bytes);
+ if (r == 4) {
+ /*
+ * Check action first
+ */
+ if (!strcmp(act, "read"))
+ rw = DDIR_READ;
+ else if (!strcmp(act, "write"))
+ rw = DDIR_WRITE;
+ else if (!strcmp(act, "sync"))
+ rw = DDIR_SYNC;
+ else {
+ log_err("fio: bad iolog file action: %s\n",
+ act);
+ continue;
+ }
+ } else if (r == 2) {
+ rw = DDIR_INVAL;
+ if (!strcmp(act, "add")) {
+ td->o.nr_files++;
+ fileno = add_file(td, fname);
+ file_action = FIO_LOG_ADD_FILE;
+ continue;
+ } else if (!strcmp(act, "open")) {
+ fileno = get_fileno(td, fname);
+ file_action = FIO_LOG_OPEN_FILE;
+ } else if (!strcmp(act, "close")) {
+ fileno = get_fileno(td, fname);
+ file_action = FIO_LOG_CLOSE_FILE;
+ } else {
+ log_err("fio: bad iolog file action: %s\n",
+ act);
+ continue;
+ }
+ } else {
+ log_err("bad iolog2: %s", p);
continue;
}
+
if (rw == DDIR_READ)
reads++;
- else if (rw == DDIR_WRITE)
+ else if (rw == DDIR_WRITE) {
+ /*
+ * Don't add a write for ro mode
+ */
+ if (read_only)
+ continue;
writes++;
- else {
+ } else if (rw != DDIR_SYNC && rw != DDIR_INVAL) {
log_err("bad ddir: %d\n", rw);
continue;
}
+ /*
+ * Make note of file
+ */
ipo = malloc(sizeof(*ipo));
+ memset(ipo, 0, sizeof(*ipo));
INIT_LIST_HEAD(&ipo->list);
ipo->offset = offset;
ipo->len = bytes;
- if (bytes > td->max_bs)
- td->max_bs = bytes;
ipo->ddir = rw;
- list_add_tail(&ipo->list, &td->io_log_list);
+ if (bytes > td->o.max_bs[rw])
+ td->o.max_bs[rw] = bytes;
+ if (rw == DDIR_INVAL) {
+ ipo->fileno = fileno;
+ ipo->file_action = file_action;
+ }
+ queue_io_piece(td, ipo);
}
free(str);
- fclose(f);
+ free(act);
+ free(fname);
+
+ if (writes && read_only) {
+ log_err("fio: <%s> skips replay of %d writes due to"
+ " read-only\n", td->o.name, writes);
+ writes = 0;
+ }
if (!reads && !writes)
return 1;
else if (reads && !writes)
- td->ddir = DDIR_READ;
+ td->o.td_ddir = TD_DDIR_READ;
else if (!reads && writes)
- td->ddir = DDIR_READ;
+ td->o.td_ddir = TD_DDIR_WRITE;
else
- td->iomix = 1;
+ td->o.td_ddir = TD_DDIR_RW;
return 0;
}
+/*
+ * open iolog, check version, and call appropriate parser
+ */
+static int init_iolog_read(struct thread_data *td)
+{
+ char buffer[256], *p;
+ FILE *f;
+ int ret;
+
+ f = fopen(td->o.read_iolog_file, "r");
+ if (!f) {
+ perror("fopen read iolog");
+ return 1;
+ }
+
+ p = fgets(buffer, sizeof(buffer), f);
+ if (!p) {
+ td_verror(td, errno, "iolog read");
+ log_err("fio: unable to read iolog\n");
+ return 1;
+ }
+
+ /*
+ * version 2 of the iolog stores a specific string as the
+ * first line, check for that
+ */
+ if (!strncmp(iolog_ver2, buffer, strlen(iolog_ver2)))
+ ret = read_iolog2(td, f);
+ else {
+ log_err("fio: iolog version 1 is no longer supported\n");
+ ret = 1;
+ }
+
+ fclose(f);
+ return ret;
+}
+
/*
* Setup a log for storing io patterns.
*/
static int init_iolog_write(struct thread_data *td)
{
+ struct fio_file *ff;
FILE *f;
+ unsigned int i;
- f = fopen(td->write_iolog_file, "w+");
+ f = fopen(td->o.write_iolog_file, "w+");
if (!f) {
perror("fopen write iolog");
return 1;
td->iolog_f = f;
td->iolog_buf = malloc(8192);
setvbuf(f, td->iolog_buf, _IOFBF, 8192);
- return 0;
-}
-
-int init_iolog(struct thread_data *td)
-{
- int ret = 0;
- if (td->io_ops->flags & FIO_CPUIO)
- return 0;
+ /*
+ * write our version line
+ */
+ if (fprintf(f, "%s\n", iolog_ver2) < 0) {
+ perror("iolog init\n");
+ return 1;
+ }
- if (td->read_iolog_file)
- ret = init_iolog_read(td);
- else if (td->write_iolog_file)
- ret = init_iolog_write(td);
+ /*
+ * add all known files
+ */
+ for_each_file(td, ff, i)
+ log_file(td, ff, FIO_LOG_ADD_FILE);
return 0;
}
-int setup_rate(struct thread_data *td)
+int init_iolog(struct thread_data *td)
{
- int nr_reads_per_sec;
+ int ret = 0;
- if (!td->rate)
+ if (td->io_ops->flags & FIO_DISKLESSIO)
return 0;
- if (td->rate < td->ratemin) {
- log_err("min rate larger than nominal rate\n");
- return -1;
- }
+ if (td->o.read_iolog_file) {
+ /*
+ * Check if it's a blktrace file and load that if possible.
+ * Otherwise assume it's a normal log file and load that.
+ */
+ if (is_blktrace(td->o.read_iolog_file))
+ ret = load_blktrace(td, td->o.read_iolog_file);
+ else
+ ret = init_iolog_read(td);
+ } else if (td->o.write_iolog_file)
+ ret = init_iolog_write(td);
- nr_reads_per_sec = (td->rate * 1024) / td->min_bs;
- td->rate_usec_cycle = 1000000 / nr_reads_per_sec;
- td->rate_pending_usleep = 0;
- return 0;
+ return ret;
}
void setup_log(struct io_log **log)
*log = l;
}
-void finish_log(struct thread_data *td, struct io_log *log, const char *name)
+void __finish_log(struct io_log *log, const char *name)
{
- char file_name[256];
- FILE *f;
unsigned int i;
+ FILE *f;
- snprintf(file_name, 200, "client%d_%s.log", td->thread_number, name);
- f = fopen(file_name, "w");
+ f = fopen(name, "w");
if (!f) {
perror("fopen log");
return;
}
- for (i = 0; i < log->nr_samples; i++)
- fprintf(f, "%lu, %lu, %u\n", log->log[i].time, log->log[i].val, log->log[i].ddir);
+ for (i = 0; i < log->nr_samples; i++) {
+ fprintf(f, "%lu, %lu, %u\n", log->log[i].time, log->log[i].val,
+ log->log[i].ddir);
+ }
fclose(f);
free(log->log);
free(log);
}
+
+void finish_log(struct thread_data *td, struct io_log *log, const char *name)
+{
+ char file_name[256];
+
+ snprintf(file_name, 200, "%s_%s.log", td->o.name, name);
+ __finish_log(log, file_name);
+}
projects / fio.git / blobdiff