*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* Parts of this file were imported from Jens Axboe's blktrace sources (also GPL)
*/
#include <sys/mman.h>
#include <time.h>
#include <math.h>
+#include <dirent.h>
#include "plot.h"
#include "blkparse.h"
extern int plot_io_action;
extern int io_per_process;
+static const int line_len = 1024;
+static char line[1024];
+
/*
* Trace categories
*/
/* sector offset of this IO */
u64 sector;
+ /* dev_t for this IO */
+ u32 device;
+
/* time this IO was dispatched */
u64 dispatch_time;
/* time this IO was finished */
char name[0];
};
-#define MINORBITS 20
-#define MINORMASK ((1 << MINORBITS) - 1)
-#define SECONDS(x) ((unsigned long long)(x) / 1000000000)
-#define NANO_SECONDS(x) ((unsigned long long)(x) % 1000000000)
-#define DOUBLE_TO_NANO_ULL(d) ((unsigned long long)((d) * 1000000000))
-#define CHECK_MAGIC(t) (((t)->magic & 0xffffff00) == BLK_IO_TRACE_MAGIC)
+u64 get_record_time(struct trace *trace)
+{
+ return trace->io->time;
+}
void init_io_hash_table(void)
{
static int io_hash_table_insert(struct pending_io *ins_pio)
{
u64 sector = ins_pio->sector;
+ u32 dev = ins_pio->device;
int slot = hash_sector(sector);
struct list_head *head;
struct pending_io *pio;
head = io_hash_table + slot;
list_for_each_entry(pio, head, hash_list) {
- if (pio->sector == sector)
+ if (pio->sector == sector && pio->device == dev)
return -EEXIST;
}
list_add_tail(&ins_pio->hash_list, head);
return 0;
}
-static struct pending_io *io_hash_table_search(u64 sector)
+static struct pending_io *io_hash_table_search(u64 sector, u32 dev)
{
int slot = hash_sector(sector);
struct list_head *head;
head = io_hash_table + slot;
list_for_each_entry(pio, head, hash_list) {
- if (pio->sector == sector)
+ if (pio->sector == sector && pio->device == dev)
return pio;
}
return NULL;
pio = calloc(1, sizeof(*pio));
pio->sector = io->sector;
+ pio->device = io->device;
pio->pid = io->pid;
ret = io_hash_table_insert(pio);
{
struct pending_io *pio;
- pio = io_hash_table_search(io->sector);
+ pio = io_hash_table_search(io->sector, io->device);
if (!pio) {
pio = hash_queued_io(io);
if (!pio)
{
struct pending_io *pio;
- pio = io_hash_table_search(io->sector);
+ pio = io_hash_table_search(io->sector, io->device);
if (!pio)
return NULL;
return -1;
}
+static struct dev_info *lookup_dev(struct trace *trace, struct blk_io_trace *io)
+{
+ u32 dev = io->device;
+ int i;
+ struct dev_info *di = NULL;
+
+ for (i = 0; i < trace->num_devices; i++) {
+ if (trace->devices[i].device == dev) {
+ di = trace->devices + i;
+ goto found;
+ }
+ }
+ i = trace->num_devices++;
+ if (i >= MAX_DEVICES_PER_TRACE) {
+ fprintf(stderr, "Trace contains too many devices (%d)\n", i);
+ exit(1);
+ }
+ di = trace->devices + i;
+ di->device = dev;
+found:
+ return di;
+}
+
+static void map_devices(struct trace *trace)
+{
+ struct dev_info *di;
+ u64 found;
+ u64 map_start = 0;
+ int i;
+
+ first_record(trace);
+ while (1) {
+ if (!(trace->io->action & BLK_TC_ACT(BLK_TC_NOTIFY))) {
+ di = lookup_dev(trace, trace->io);
+ found = trace->io->sector << 9;
+ if (found < di->min)
+ di->min = found;
+
+ found += trace->io->bytes;
+ if (di->max < found)
+ di->max = found;
+ }
+ if (next_record(trace))
+ break;
+ }
+ first_record(trace);
+ for (i = 0; i < trace->num_devices; i++) {
+ di = trace->devices + i;
+ di->map = map_start;
+ map_start += di->max - di->min;
+ }
+}
+
+u64 map_io(struct trace *trace, struct blk_io_trace *io)
+{
+ struct dev_info *di = lookup_dev(trace, io);
+ u64 val = trace->io->sector << 9;
+ return di->map + val - di->min;
+}
+
void find_extreme_offsets(struct trace *trace, u64 *min_ret, u64 *max_ret, u64 *max_bank_ret,
u64 *max_offset_ret)
{
u64 max_bank = 0;
u64 max_bank_offset = 0;
u64 num_banks = 0;
+
+ map_devices(trace);
+
first_record(trace);
while (1) {
if (!(trace->io->action & BLK_TC_ACT(BLK_TC_NOTIFY))) {
- found = trace->io->sector << 9;
+ found = map_io(trace, trace->io);
if (found < min)
min = found;
check_io_types(trace);
if (!(trace->io->action & BLK_TC_ACT(BLK_TC_NOTIFY)) &&
(trace->io->action & BLK_TA_MASK) == __BLK_TA_QUEUE) {
- u64 off = (trace->io->sector << 9) - min_offset;
+ u64 off = map_io(trace, trace->io) - min_offset;
slot = (int)(off / bytes_per_bucket);
hits[slot]++;
return 0;
}
+static char footer[] = ".blktrace.0";
+static int footer_len = sizeof(footer);
+
+static void match_trace(char *name, char **traces)
+{
+ int match_len;
+ char *match;
+ int footer_start;
+
+ match_len = strlen(name);
+ if (match_len <= footer_len)
+ return;
+
+ footer_start = match_len - footer_len;
+ if (strcmp(name + footer_start + 1, footer) != 0)
+ return;
+
+ match = strdup(name);
+ if (!match)
+ goto enomem;
+
+ match[footer_start + 1] = '\0';
+ snprintf(line, line_len, "%s -i '%s'", *traces ? *traces : "", match);
+ free(match);
+
+ match = strdup(line);
+ if (!match)
+ goto enomem;
+
+ free(*traces);
+ *traces = match;
+ return;
+
+enomem:
+ perror("memory allocation failed");
+ exit(1);
+ return;
+}
+
+static char *combine_blktrace_devs(char *dir_name)
+{
+ DIR *dir;
+ char *traces = NULL;
+ struct dirent *d;
+ int len;
+ int ret;
+
+ dir = opendir(dir_name);
+ if (!dir)
+ return NULL;
+
+ while (1) {
+ d = readdir(dir);
+ if (!d)
+ break;
+
+ len = strlen(d->d_name);
+ if (len > footer_len)
+ match_trace(d->d_name, &traces);
+ }
+
+ closedir(dir);
+
+ if (!traces)
+ return NULL;
+
+ snprintf(line, line_len, "blkparse -O %s -D %s -d '%s.%s'",
+ traces, dir_name, dir_name, "dump");
+
+ ret = system(line);
+ if (ret) {
+ fprintf(stderr, "blkparse failure %s\n", line);
+ exit(1);
+ }
+ snprintf(line, line_len, "%s.%s", dir_name, "dump");
+ return strdup(line);
+}
+
static char *find_trace_file(char *filename)
{
int ret;
struct stat st;
- char line[1024];
char *dot;
char *try;
+ int found_dir = 0;
+ /* look for an exact match of whatever they pass in.
+ * If it is a file, assume it is the dump file.
+ * If a directory, remember that it existed so we
+ * can combine traces in that directory later
+ */
ret = stat(filename, &st);
- if (ret == 0)
- return strdup(filename);
+ if (ret == 0) {
+ if (S_ISREG(st.st_mode))
+ return strdup(filename);
- snprintf(line, 1024, "%s.%s", filename, "dump");
+ if (S_ISDIR(st.st_mode))
+ found_dir = 1;
+ }
+
+ /*
+ * try tacking .dump onto the end and see if that already
+ * has been generated
+ */
+ snprintf(line, line_len, "%s.%s", filename, "dump");
ret = stat(line, &st);
if (ret == 0)
return strdup(line);
+ /*
+ * try to generate the .dump from all the traces in
+ * a single dir.
+ */
+ if (found_dir) {
+ try = combine_blktrace_devs(filename);
+ if (try)
+ return try;
+ }
+
+ /*
+ * try to generate the .dump from all the blktrace
+ * files for a named trace
+ */
try = strdup(filename);
dot = strrchr(try, '.');
if (!dot || strcmp(".dump", dot) != 0) {
if (dot && dot != try)
*dot = '\0';
- snprintf(line, 1024, "%s%s", try, ".blktrace.0");
+ snprintf(line, line_len, "%s%s", try, ".blktrace.0");
ret = stat(line, &st);
if (ret == 0) {
blktrace_to_dump(try);
- snprintf(line, 1024, "%s.%s", try, "dump");
+ snprintf(line, line_len, "%s.%s", try, "dump");
ret = stat(line, &st);
if (ret == 0) {
free(try);
return __BLK_TA_COMPLETE;
}
-void add_tput(struct trace *trace, struct graph_line_data *gld)
+void add_tput(struct trace *trace, struct graph_line_data *writes_gld,
+ struct graph_line_data *reads_gld)
{
struct blk_io_trace *io = trace->io;
+ struct graph_line_data *gld;
int action = io->action & BLK_TA_MASK;
int seconds;
if (action != tput_event(trace))
return;
- seconds = SECONDS(io->time);
- if (seconds > gld->max_seconds)
- return;
+ if (BLK_DATADIR(io->action) & BLK_TC_READ)
+ gld = reads_gld;
+ else
+ gld = writes_gld;
+ seconds = SECONDS(io->time);
gld->data[seconds].sum += io->bytes;
+
gld->data[seconds].count = 1;
if (gld->data[seconds].sum > gld->max)
gld->max = gld->data[seconds].sum;
if (action != io_event(trace))
return;
- offset = io->sector << 9;
+ offset = map_io(trace, io);
pm = get_pid_map(tf, io->pid);
if (!pm) {
void add_pending_io(struct trace *trace, struct graph_line_data *gld)
{
- int seconds;
+ unsigned int seconds;
struct blk_io_trace *io = trace->io;
int action = io->action & BLK_TA_MASK;
double avg;
if (action != __BLK_TA_ISSUE)
return;
- seconds = SECONDS(io->time);
- if (seconds > gld->max_seconds)
- return;
-
pio = hash_dispatched_io(trace->io);
if (!pio)
return;
ios_in_flight++;
+ seconds = SECONDS(io->time);
gld->data[seconds].sum += ios_in_flight;
gld->data[seconds].count++;
return;
seconds = SECONDS(io->time);
- if (seconds > gld->max_seconds)
- return;
-
gld->data[seconds].sum += 1;
gld->data[seconds].count = 1;
if (gld->data[seconds].sum > gld->max)
projects / blktrace.git / blobdiff