#include "flist.h"
#include "fio.h"
#include "blktrace_api.h"
+#include "lib/linux-dev-lookup.h"
#define TRACE_FIFO_SIZE 8192
* Check if this is a blktrace binary data file. We read a single trace
* into memory and check for the magic signature.
*/
-int is_blktrace(const char *filename)
+int is_blktrace(const char *filename, int *need_swap)
{
struct blk_io_trace t;
int fd, ret;
return 0;
}
- if ((t.magic & 0xffffff00) == BLK_IO_TRACE_MAGIC)
+ if ((t.magic & 0xffffff00) == BLK_IO_TRACE_MAGIC) {
+ *need_swap = 0;
return 1;
+ }
- return 0;
-}
-
-static int lookup_device(struct thread_data *td, char *path, unsigned int maj,
- unsigned int min)
-{
- struct dirent *dir;
- struct stat st;
- int found = 0;
- DIR *D;
-
- D = opendir(path);
- if (!D)
- return 0;
-
- while ((dir = readdir(D)) != NULL) {
- char full_path[256];
-
- if (!strcmp(dir->d_name, ".") || !strcmp(dir->d_name, ".."))
- continue;
-
- sprintf(full_path, "%s%s%s", path, FIO_OS_PATH_SEPARATOR, dir->d_name);
- if (lstat(full_path, &st) == -1) {
- perror("lstat");
- break;
- }
-
- if (S_ISDIR(st.st_mode)) {
- found = lookup_device(td, full_path, maj, min);
- if (found) {
- strcpy(path, full_path);
- break;
- }
- }
-
- if (!S_ISBLK(st.st_mode))
- continue;
-
- /*
- * If replay_redirect is set then always return this device
- * upon lookup which overrides the device lookup based on
- * major minor in the actual blktrace
- */
- if (td->o.replay_redirect) {
- dprint(FD_BLKTRACE, "device lookup: %d/%d\n overridden"
- " with: %s", maj, min,
- td->o.replay_redirect);
- strcpy(path, td->o.replay_redirect);
- found = 1;
- break;
- }
-
- if (maj == major(st.st_rdev) && min == minor(st.st_rdev)) {
- dprint(FD_BLKTRACE, "device lookup: %d/%d\n", maj, min);
- strcpy(path, full_path);
- found = 1;
- break;
- }
+ /*
+ * Maybe it needs to be endian swapped...
+ */
+ t.magic = fio_swap32(t.magic);
+ if ((t.magic & 0xffffff00) == BLK_IO_TRACE_MAGIC) {
+ *need_swap = 1;
+ return 1;
}
- closedir(D);
- return found;
+ return 0;
}
#define FMINORBITS 20
}
strcpy(dev, "/dev");
- if (lookup_device(td, dev, maj, min)) {
+ if (blktrace_lookup_device(td->o.replay_redirect, dev, maj, min)) {
int fileno;
+ if (td->o.replay_redirect)
+ dprint(FD_BLKTRACE, "device lookup: %d/%d\n overridden"
+ " with: %s\n", maj, min,
+ td->o.replay_redirect);
+ else
+ dprint(FD_BLKTRACE, "device lookup: %d/%d\n", maj, min);
+
dprint(FD_BLKTRACE, "add devices %s\n", dev);
fileno = add_file_exclusive(td, dev);
+ td->o.open_files++;
+ td->files[fileno]->major = maj;
+ td->files[fileno]->minor = min;
trace_add_open_close_event(td, fileno, FIO_LOG_OPEN_FILE);
last_fileno = fileno;
}
+
return last_fileno;
}
{
switch (t->action) {
case BLK_TN_PROCESS:
- printf("got process notify: %x, %d\n", t->action, t->pid);
+ dprint(FD_BLKTRACE, "got process notify: %x, %d\n",
+ t->action, t->pid);
break;
case BLK_TN_TIMESTAMP:
- printf("got timestamp notify: %x, %d\n", t->action, t->pid);
+ dprint(FD_BLKTRACE, "got timestamp notify: %x, %d\n",
+ t->action, t->pid);
break;
case BLK_TN_MESSAGE:
break;
}
}
-static void handle_trace_discard(struct thread_data *td, struct blk_io_trace *t,
- unsigned long long ttime, unsigned long *ios)
+static void handle_trace_discard(struct thread_data *td,
+ struct blk_io_trace *t,
+ unsigned long long ttime,
+ unsigned long *ios, unsigned int *bs)
{
struct io_piece *ipo = malloc(sizeof(*ipo));
int fileno;
init_ipo(ipo);
fileno = trace_add_file(td, t->device);
- ios[DDIR_WRITE]++;
+ ios[DDIR_TRIM]++;
+ if (t->bytes > bs[DDIR_TRIM])
+ bs[DDIR_TRIM] = t->bytes;
+
td->o.size += t->bytes;
memset(ipo, 0, sizeof(*ipo));
* due to internal workings of the block layer.
*/
static void handle_trace(struct thread_data *td, struct blk_io_trace *t,
- unsigned long long ttime, unsigned long *ios,
- unsigned int *bs)
+ unsigned long *ios, unsigned int *bs)
{
+ static unsigned long long last_ttime;
+ unsigned long long delay;
+
if ((t->action & 0xffff) != __BLK_TA_QUEUE)
return;
- if (t->action & BLK_TC_ACT(BLK_TC_PC))
- return;
+
+ if (!(t->action & BLK_TC_ACT(BLK_TC_NOTIFY))) {
+ if (!last_ttime || td->o.no_stall) {
+ last_ttime = t->time;
+ delay = 0;
+ } else {
+ delay = t->time - last_ttime;
+ last_ttime = t->time;
+ }
+ }
if (t->action & BLK_TC_ACT(BLK_TC_NOTIFY))
handle_trace_notify(t);
else if (t->action & BLK_TC_ACT(BLK_TC_DISCARD))
- handle_trace_discard(td, t, ttime, ios);
+ handle_trace_discard(td, t, delay, ios, bs);
else
- handle_trace_fs(td, t, ttime, ios, bs);
+ handle_trace_fs(td, t, delay, ios, bs);
+}
+
+static void byteswap_trace(struct blk_io_trace *t)
+{
+ t->magic = fio_swap32(t->magic);
+ t->sequence = fio_swap32(t->sequence);
+ t->time = fio_swap64(t->time);
+ t->sector = fio_swap64(t->sector);
+ t->bytes = fio_swap32(t->bytes);
+ t->action = fio_swap32(t->action);
+ t->pid = fio_swap32(t->pid);
+ t->device = fio_swap32(t->device);
+ t->cpu = fio_swap32(t->cpu);
+ t->error = fio_swap16(t->error);
+ t->pdu_len = fio_swap16(t->pdu_len);
+}
+
+static int t_is_write(struct blk_io_trace *t)
+{
+ return (t->action & BLK_TC_ACT(BLK_TC_WRITE | BLK_TC_DISCARD)) != 0;
}
/*
* Load a blktrace file by reading all the blk_io_trace entries, and storing
* them as io_pieces like the fio text version would do.
*/
-int load_blktrace(struct thread_data *td, const char *filename)
+int load_blktrace(struct thread_data *td, const char *filename, int need_swap)
{
- unsigned long long ttime, delay;
struct blk_io_trace t;
- unsigned long ios[2], skipped_writes;
- unsigned int cpu;
- unsigned int rw_bs[2];
+ unsigned long ios[DDIR_RWDIR_CNT], skipped_writes;
+ unsigned int rw_bs[DDIR_RWDIR_CNT];
struct fifo *fifo;
- int fd, i;
+ int fd, i, old_state;
struct fio_file *f;
+ int this_depth, depth;
fd = open(filename, O_RDONLY);
if (fd < 0) {
fifo = fifo_alloc(TRACE_FIFO_SIZE);
+ old_state = td_bump_runstate(td, TD_SETTING_UP);
+
td->o.size = 0;
- cpu = 0;
- ttime = 0;
ios[0] = ios[1] = 0;
rw_bs[0] = rw_bs[1] = 0;
skipped_writes = 0;
+ this_depth = depth = 0;
do {
int ret = trace_fifo_get(td, fifo, fd, &t, sizeof(t));
break;
}
+ if (need_swap)
+ byteswap_trace(&t);
+
if ((t.magic & 0xffffff00) != BLK_IO_TRACE_MAGIC) {
log_err("fio: bad magic in blktrace data: %x\n",
t.magic);
goto err;
}
if ((t.action & BLK_TC_ACT(BLK_TC_NOTIFY)) == 0) {
- if (!ttime) {
- ttime = t.time;
- cpu = t.cpu;
+ if ((t.action & 0xffff) == __BLK_TA_QUEUE)
+ this_depth++;
+ else if ((t.action & 0xffff) == __BLK_TA_COMPLETE) {
+ depth = max(depth, this_depth);
+ this_depth = 0;
}
- delay = 0;
- if (cpu == t.cpu)
- delay = t.time - ttime;
- if ((t.action & BLK_TC_ACT(BLK_TC_WRITE)) && read_only)
+ if (t_is_write(&t) && read_only) {
skipped_writes++;
- else {
- /*
- * set delay to zero if no_stall enabled for
- * fast replay
- */
- if (td->o.no_stall)
- delay = 0;
-
- handle_trace(td, &t, delay, ios, rw_bs);
+ continue;
}
-
- ttime = t.time;
- cpu = t.cpu;
- } else {
- delay = 0;
- handle_trace(td, &t, delay, ios, rw_bs);
}
+
+ handle_trace(td, &t, ios, rw_bs);
} while (1);
- for_each_file(td, f, i)
+ for (i = 0; i < td->files_index; i++) {
+ f = td->files[i];
trace_add_open_close_event(td, f->fileno, FIO_LOG_CLOSE_FILE);
+ }
fifo_free(fifo);
close(fd);
+ td_restore_runstate(td, old_state);
+
+ if (!td->files_index) {
+ log_err("fio: did not find replay device(s)\n");
+ return 1;
+ }
+
+ /*
+ * For stacked devices, we don't always get a COMPLETE event so
+ * the depth grows to insane values. Limit it to something sane(r).
+ */
+ if (!depth || depth > 1024)
+ depth = 1024;
+
if (skipped_writes)
log_err("fio: %s skips replay of %lu writes due to read-only\n",
td->o.name, skipped_writes);
if (!ios[DDIR_READ] && !ios[DDIR_WRITE]) {
log_err("fio: found no ios in blktrace data\n");
return 1;
- } else if (ios[DDIR_READ] && !ios[DDIR_READ]) {
+ } else if (ios[DDIR_READ] && !ios[DDIR_WRITE]) {
td->o.td_ddir = TD_DDIR_READ;
td->o.max_bs[DDIR_READ] = rw_bs[DDIR_READ];
} else if (!ios[DDIR_READ] && ios[DDIR_WRITE]) {
td->o.td_ddir = TD_DDIR_RW;
td->o.max_bs[DDIR_READ] = rw_bs[DDIR_READ];
td->o.max_bs[DDIR_WRITE] = rw_bs[DDIR_WRITE];
+ td->o.max_bs[DDIR_TRIM] = rw_bs[DDIR_TRIM];
}
/*
*/
td->o.odirect = 1;
+ /*
+ * we don't know if this option was set or not. it defaults to 1,
+ * so we'll just guess that we should override it if it's still 1
+ */
+ if (td->o.iodepth == 1)
+ td->o.iodepth = td->o.iodepth_low = depth;
+
return 0;
err:
close(fd);
projects / fio.git / blobdiff