blob: fce9d01ed2c6be655d2bda50db76c951b74c0bd5 [file] [log] [blame]
* Copyright (C) 2012 Fusion-io
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public
* License v2 as published by the Free Software Foundation.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* GNU General Public License for more details.
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
* Parts of this file were imported from Jens Axboe's blktrace sources (also GPL)
#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)
struct dev_info {
u32 device;
u64 min;
u64 max;
u64 map;
struct trace {
int fd;
u64 len;
char *start;
char *cur;
struct blk_io_trace *io;
u64 start_timestamp;
struct timespec abs_start_time;
* flags for the things we find in the stream
* we prefer different events for different things
int found_issue;
int found_completion;
int found_queue;
char *mpstat_start;
char *mpstat_cur;
u64 mpstat_len;
int mpstat_fd;
int mpstat_seconds;
int mpstat_num_cpus;
char *fio_start;
char *fio_cur;
u64 fio_len;
int fio_fd;
int fio_seconds;
int num_devices;
struct dev_info devices[MAX_DEVICES_PER_TRACE];
struct trace_file {
struct list_head list;
char *filename;
char *label;
struct trace *trace;
unsigned int stop_seconds; /* Time when trace stops */
unsigned int min_seconds; /* Beginning of the interval we should plot */
unsigned int max_seconds; /* End of the interval we should plot */
u64 min_offset;
u64 max_offset;
char *reads_color;
char *writes_color;
char *line_color;
struct graph_line_data *tput_writes_gld;
struct graph_line_data *tput_reads_gld;
struct graph_line_data *iop_gld;
struct graph_line_data *latency_gld;
struct graph_line_data *queue_depth_gld;
int fio_trace;
struct graph_line_data *fio_gld;
/* Number of entries in gdd_writes / gdd_reads */
int io_plots;
/* Allocated array size for gdd_writes / gdd_reads */
int io_plots_allocated;
struct graph_dot_data **gdd_writes;
struct graph_dot_data **gdd_reads;
unsigned int mpstat_min_seconds;
unsigned int mpstat_max_seconds;
unsigned int mpstat_stop_seconds;
struct graph_line_data **mpstat_gld;
static inline unsigned int MAJOR(unsigned int dev)
return dev >> MINORBITS;
static inline unsigned int MINOR(unsigned int dev)
return dev & MINORMASK;
void init_io_hash_table(void);
void init_process_hash_table(void);
struct trace *open_trace(char *filename);
u64 find_last_time(struct trace *trace);
void find_extreme_offsets(struct trace *trace, u64 *min_ret, u64 *max_ret,
u64 *max_bank_ret, u64 *max_offset_ret);
int filter_outliers(struct trace *trace, u64 min_offset, u64 max_offset,
u64 *yzoom_min, u64 *yzoom_max);
int action_char_to_num(char action);
void add_iop(struct trace *trace, struct graph_line_data *gld);
void check_record(struct trace *trace);
void add_completed_io(struct trace *trace,
struct graph_line_data *latency_gld);
void add_io(struct trace *trace, struct trace_file *tf);
void add_tput(struct trace *trace, struct graph_line_data *writes_gld,
struct graph_line_data *reads_gld);
void add_pending_io(struct trace *trace, struct graph_line_data *gld);
int next_record(struct trace *trace);
u64 get_record_time(struct trace *trace);
void first_record(struct trace *trace);