+/*
+ * block queue tracing parse application
+ *
+ * Copyright (C) 2005 Jens Axboe <axboe@suse.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <fcntl.h>
#include <stdlib.h>
#include <string.h>
+#include <getopt.h>
+#include <errno.h>
+#include <signal.h>
+#include <locale.h>
+#include <limits.h>
#include "blktrace.h"
#include "rbtree.h"
+#include "jhash.h"
-#define NELEMS(pfi) ((pfi)->stat.st_size / sizeof(struct blk_io_trace))
+static char blkparse_version[] = "0.90";
-#define MAX_CPUS (512)
+struct per_dev_info {
+ dev_t id;
+ char *name;
-struct per_file_info {
- int cpu;
- int nelems;
- struct stat stat;
+ int backwards;
+ unsigned long long events;
+ unsigned long long last_reported_time;
+ unsigned long long last_read_time;
+ struct io_stats io_stats;
+ unsigned long last_sequence;
+ unsigned long skips;
- int fd;
- char *fname;
- FILE *ofp;
- char *ofname;
- int dfd;
- char *dname;
-
- void *trace_buf;
+ int nfiles;
+ int ncpus;
+ struct per_cpu_info *cpus;
+};
- unsigned long long start_time;
+struct per_process_info {
+ char name[16];
+ __u32 pid;
+ struct io_stats io_stats;
+ struct per_process_info *hash_next, *list_next;
+ int more_than_one;
+
+ /*
+ * individual io stats
+ */
+ unsigned long long longest_allocation_wait[2];
+ unsigned long long longest_dispatch_wait[2];
+ unsigned long long longest_completion_wait[2];
};
-static struct rb_root rb_root;
+#define PPI_HASH_SHIFT (8)
+#define PPI_HASH_SIZE (1 << PPI_HASH_SHIFT)
+#define PPI_HASH_MASK (PPI_HASH_SIZE - 1)
+static struct per_process_info *ppi_hash_table[PPI_HASH_SIZE];
+static struct per_process_info *ppi_list;
+static int ppi_list_entries;
+
+#define S_OPTS "i:o:b:stqw:f:F:vn"
+static struct option l_opts[] = {
+ {
+ .name = "input",
+ .has_arg = required_argument,
+ .flag = NULL,
+ .val = 'i'
+ },
+ {
+ .name = "output",
+ .has_arg = required_argument,
+ .flag = NULL,
+ .val = 'o'
+ },
+ {
+ .name = "batch",
+ .has_arg = required_argument,
+ .flag = NULL,
+ .val = 'b'
+ },
+ {
+ .name = "per program stats",
+ .has_arg = no_argument,
+ .flag = NULL,
+ .val = 's'
+ },
+ {
+ .name = "track ios",
+ .has_arg = no_argument,
+ .flag = NULL,
+ .val = 't'
+ },
+ {
+ .name = "quiet",
+ .has_arg = no_argument,
+ .flag = NULL,
+ .val = 'q'
+ },
+ {
+ .name = "stopwatch",
+ .has_arg = required_argument,
+ .flag = NULL,
+ .val = 'w'
+ },
+ {
+ .name = "format",
+ .has_arg = required_argument,
+ .flag = NULL,
+ .val = 'f'
+ },
+ {
+ .name = "format-spec",
+ .has_arg = required_argument,
+ .flag = NULL,
+ .val = 'F'
+ },
+ {
+ .name = "hash by name",
+ .has_arg = no_argument,
+ .flag = NULL,
+ .val = 'n'
+ },
+ {
+ .name = "version",
+ .has_arg = no_argument,
+ .flag = NULL,
+ .val = 'v'
+ },
+};
+/*
+ * for sorting the displayed output
+ */
struct trace {
struct blk_io_trace *bit;
struct rb_node rb_node;
+ struct trace *next;
+ int skipped;
};
-struct per_file_info per_file_info[MAX_CPUS];
-struct per_file_info *current;
+static struct rb_root rb_sort_root;
+static unsigned long rb_sort_entries;
+
+static struct rb_root rb_track_root;
+
+static struct trace *trace_list;
+
+/*
+ * allocation cache
+ */
+static struct blk_io_trace *bit_alloc_list;
+static struct trace *t_alloc_list;
+
+/*
+ * for tracking individual ios
+ */
+struct io_track {
+ struct rb_node rb_node;
+
+ dev_t device;
+ __u64 sector;
+ __u32 pid;
+ char comm[16];
+ unsigned long long allocation_time;
+ unsigned long long queue_time;
+ unsigned long long dispatch_time;
+ unsigned long long completion_time;
+};
+
+static int ndevices;
+static struct per_dev_info *devices;
+static char *get_dev_name(struct per_dev_info *, char *, int);
+
+FILE *ofp = NULL;
+static char *output_name;
+
+static unsigned long long genesis_time;
+static unsigned long long last_allowed_time;
+static unsigned long long stopwatch_start; /* start from zero by default */
+static unsigned long long stopwatch_end = ULONG_LONG_MAX; /* "infinity" */
+
+static int per_process_stats;
+static int track_ios;
+static int ppi_hash_by_pid = 1;
+
+#define RB_BATCH_DEFAULT (512)
+static int rb_batch = RB_BATCH_DEFAULT;
+
+static int pipeline;
+
+#define is_done() (*(volatile int *)(&done))
+static volatile int done;
+
+#define JHASH_RANDOM (0x3af5f2ee)
+
+static inline int ppi_hash_pid(__u32 pid)
+{
+ return jhash_1word(pid, JHASH_RANDOM) & PPI_HASH_MASK;
+}
+
+static inline int ppi_hash_name(const char *name)
+{
+ return jhash(name, 16, JHASH_RANDOM) & PPI_HASH_MASK;
+}
+
+static inline int ppi_hash(struct per_process_info *ppi)
+{
+ if (ppi_hash_by_pid)
+ return ppi_hash_pid(ppi->pid);
+
+ return ppi_hash_name(ppi->name);
+}
+
+static inline void add_process_to_hash(struct per_process_info *ppi)
+{
+ const int hash_idx = ppi_hash(ppi);
+
+ ppi->hash_next = ppi_hash_table[hash_idx];
+ ppi_hash_table[hash_idx] = ppi;
+}
+
+static inline void add_process_to_list(struct per_process_info *ppi)
+{
+ ppi->list_next = ppi_list;
+ ppi_list = ppi;
+ ppi_list_entries++;
+}
+
+static struct per_process_info *find_process_by_name(char *name)
+{
+ const int hash_idx = ppi_hash_name(name);
+ struct per_process_info *ppi;
+
+ ppi = ppi_hash_table[hash_idx];
+ while (ppi) {
+ if (!strcmp(ppi->name, name))
+ return ppi;
+
+ ppi = ppi->hash_next;
+ }
+
+ return NULL;
+}
+
+static struct per_process_info *find_process_by_pid(__u32 pid)
+{
+ const int hash_idx = ppi_hash_pid(pid);
+ struct per_process_info *ppi;
+
+ ppi = ppi_hash_table[hash_idx];
+ while (ppi) {
+ if (ppi->pid == pid)
+ return ppi;
+
+ ppi = ppi->hash_next;
+ }
+
+ return NULL;
+}
+
+static struct per_process_info *find_process(__u32 pid, char *name)
+{
+ struct per_process_info *ppi;
+
+ if (ppi_hash_by_pid)
+ return find_process_by_pid(pid);
+
+ ppi = find_process_by_name(name);
+ if (ppi && ppi->pid != pid)
+ ppi->more_than_one = 1;
+
+ return ppi;
+}
+
+static inline int trace_rb_insert(struct trace *t)
+{
+ struct rb_node **p = &rb_sort_root.rb_node;
+ struct rb_node *parent = NULL;
+ struct trace *__t;
+
+ while (*p) {
+ parent = *p;
+ __t = rb_entry(parent, struct trace, rb_node);
+
+ if (t->bit->time < __t->bit->time)
+ p = &(*p)->rb_left;
+ else if (t->bit->time > __t->bit->time)
+ p = &(*p)->rb_right;
+ else if (t->bit->device < __t->bit->device)
+ p = &(*p)->rb_left;
+ else if (t->bit->device > __t->bit->device)
+ p = &(*p)->rb_right;
+ else if (t->bit->sequence < __t->bit->sequence)
+ p = &(*p)->rb_left;
+ else if (t->bit->sequence > __t->bit->sequence)
+ p = &(*p)->rb_right;
+ else if (t->bit->device == __t->bit->device) {
+ fprintf(stderr,
+ "sequence alias (%d) on device %d,%d!\n",
+ t->bit->sequence,
+ MAJOR(t->bit->device), MINOR(t->bit->device));
+ return 1;
+ }
+ }
+
+ rb_sort_entries++;
+ rb_link_node(&t->rb_node, parent, p);
+ rb_insert_color(&t->rb_node, &rb_sort_root);
+ return 0;
+}
+
+static struct trace *trace_rb_find(dev_t device, unsigned long sequence)
+{
+ struct rb_node **p = &rb_sort_root.rb_node;
+ struct rb_node *parent = NULL;
+ struct trace *__t;
+
+ while (*p) {
+ parent = *p;
+ __t = rb_entry(parent, struct trace, rb_node);
+
+ if (device < __t->bit->device)
+ p = &(*p)->rb_left;
+ else if (device > __t->bit->device)
+ p = &(*p)->rb_right;
+ else if (sequence < __t->bit->sequence)
+ p = &(*p)->rb_left;
+ else if (sequence > __t->bit->sequence)
+ p = &(*p)->rb_right;
+ else
+ return __t;
+ }
+
+ return NULL;
+}
+
+static inline int track_rb_insert(struct io_track *iot)
+{
+ struct rb_node **p = &rb_track_root.rb_node;
+ struct rb_node *parent = NULL;
+ struct io_track *__iot;
+
+ while (*p) {
+ parent = *p;
+
+ __iot = rb_entry(parent, struct io_track, rb_node);
+
+ if (iot->device < __iot->device)
+ p = &(*p)->rb_left;
+ else if (iot->device > __iot->device)
+ p = &(*p)->rb_right;
+ else if (iot->sector < __iot->sector)
+ p = &(*p)->rb_left;
+ else if (iot->sector > __iot->sector)
+ p = &(*p)->rb_right;
+ else {
+ fprintf(stderr,
+ "sector alias (%Lu) on device %d,%d!\n",
+ (unsigned long long) iot->sector,
+ MAJOR(iot->device), MINOR(iot->device));
+ return 1;
+ }
+ }
-static unsigned long qreads, qwrites, creads, cwrites, mreads, mwrites;
-static unsigned long long qread_kb, qwrite_kb, cread_kb, cwrite_kb;
-static unsigned long long events, missed_events;
+ rb_link_node(&iot->rb_node, parent, p);
+ rb_insert_color(&iot->rb_node, &rb_track_root);
+ return 0;
+}
-static inline void account_m(int rw, unsigned int bytes)
+static struct io_track *__find_track(dev_t device, __u64 sector)
+{
+ struct rb_node **p = &rb_track_root.rb_node;
+ struct rb_node *parent = NULL;
+ struct io_track *__iot;
+
+ while (*p) {
+ parent = *p;
+
+ __iot = rb_entry(parent, struct io_track, rb_node);
+
+ if (device < __iot->device)
+ p = &(*p)->rb_left;
+ else if (device > __iot->device)
+ p = &(*p)->rb_right;
+ else if (sector < __iot->sector)
+ p = &(*p)->rb_left;
+ else if (sector > __iot->sector)
+ p = &(*p)->rb_right;
+ else
+ return __iot;
+ }
+
+ return NULL;
+}
+
+static struct io_track *find_track(__u32 pid, char *comm, dev_t device,
+ __u64 sector)
+{
+ struct io_track *iot;
+
+ iot = __find_track(device, sector);
+ if (!iot) {
+ iot = malloc(sizeof(*iot));
+ iot->pid = pid;
+ memcpy(iot->comm, comm, sizeof(iot->comm));
+ iot->device = device;
+ iot->sector = sector;
+ track_rb_insert(iot);
+ }
+
+ return iot;
+}
+
+static void log_track_frontmerge(struct blk_io_trace *t)
+{
+ struct io_track *iot;
+
+ if (!track_ios)
+ return;
+
+ iot = __find_track(t->device, t->sector + (t->bytes >> 9));
+ if (!iot) {
+ fprintf(stderr, "failed to find mergeable event\n");
+ return;
+ }
+
+ rb_erase(&iot->rb_node, &rb_track_root);
+ iot->sector -= t->bytes >> 9;
+ track_rb_insert(iot);
+}
+
+static void log_track_getrq(struct blk_io_trace *t)
+{
+ struct io_track *iot;
+
+ if (!track_ios)
+ return;
+
+ iot = find_track(t->pid, t->comm, t->device, t->sector);
+ iot->allocation_time = t->time;
+}
+
+
+/*
+ * return time between rq allocation and insertion
+ */
+static unsigned long long log_track_insert(struct blk_io_trace *t)
+{
+ unsigned long long elapsed;
+ struct io_track *iot;
+
+ if (!track_ios)
+ return -1;
+
+ iot = find_track(t->pid, t->comm, t->device, t->sector);
+ iot->queue_time = t->time;
+ elapsed = iot->queue_time - iot->allocation_time;
+
+ if (per_process_stats) {
+ struct per_process_info *ppi = find_process(iot->pid,iot->comm);
+ int w = (t->action & BLK_TC_ACT(BLK_TC_WRITE)) != 0;
+
+ if (ppi && elapsed > ppi->longest_allocation_wait[w])
+ ppi->longest_allocation_wait[w] = elapsed;
+ }
+
+ return elapsed;
+}
+
+/*
+ * return time between queue and issue
+ */
+static unsigned long long log_track_issue(struct blk_io_trace *t)
+{
+ unsigned long long elapsed;
+ struct io_track *iot;
+
+ if (!track_ios)
+ return -1;
+ if ((t->action & BLK_TC_ACT(BLK_TC_FS)) == 0)
+ return -1;
+
+ iot = __find_track(t->device, t->sector);
+ if (!iot) {
+ fprintf(stderr, "failed to find issue event\n");
+ return -1;
+ }
+
+ iot->dispatch_time = t->time;
+ elapsed = iot->dispatch_time - iot->queue_time;
+
+ if (per_process_stats) {
+ struct per_process_info *ppi = find_process(iot->pid,iot->comm);
+ int w = (t->action & BLK_TC_ACT(BLK_TC_WRITE)) != 0;
+
+ if (ppi && elapsed > ppi->longest_dispatch_wait[w])
+ ppi->longest_dispatch_wait[w] = elapsed;
+ }
+
+ return elapsed;
+}
+
+/*
+ * return time between dispatch and complete
+ */
+static unsigned long long log_track_complete(struct blk_io_trace *t)
+{
+ unsigned long long elapsed;
+ struct io_track *iot;
+
+ if (!track_ios)
+ return -1;
+ if ((t->action & BLK_TC_ACT(BLK_TC_FS)) == 0)
+ return -1;
+
+ iot = __find_track(t->device, t->sector);
+ if (!iot) {
+ fprintf(stderr, "failed to find complete event\n");
+ return -1;
+ }
+
+ iot->completion_time = t->time;
+ elapsed = iot->completion_time - iot->dispatch_time;
+
+ if (per_process_stats) {
+ struct per_process_info *ppi = find_process(iot->pid,iot->comm);
+ int w = (t->action & BLK_TC_ACT(BLK_TC_WRITE)) != 0;
+
+ if (ppi && elapsed > ppi->longest_completion_wait[w])
+ ppi->longest_completion_wait[w] = elapsed;
+ }
+
+ /*
+ * kill the trace, we don't need it after completion
+ */
+ rb_erase(&iot->rb_node, &rb_track_root);
+ free(iot);
+
+ return elapsed;
+}
+
+
+static struct io_stats *find_process_io_stats(__u32 pid, char *name)
+{
+ struct per_process_info *ppi = find_process(pid, name);
+
+ if (!ppi) {
+ ppi = malloc(sizeof(*ppi));
+ memset(ppi, 0, sizeof(*ppi));
+ memcpy(ppi->name, name, 16);
+ ppi->pid = pid;
+ add_process_to_hash(ppi);
+ add_process_to_list(ppi);
+ }
+
+ return &ppi->io_stats;
+}
+
+static void resize_cpu_info(struct per_dev_info *pdi, int cpu)
+{
+ struct per_cpu_info *cpus = pdi->cpus;
+ int ncpus = pdi->ncpus;
+ int new_count = cpu + 1;
+ int new_space, size;
+ char *new_start;
+
+ size = new_count * sizeof(struct per_cpu_info);
+ cpus = realloc(cpus, size);
+ if (!cpus) {
+ char name[20];
+ fprintf(stderr, "Out of memory, CPU info for device %s (%d)\n",
+ get_dev_name(pdi, name, sizeof(name)), size);
+ exit(1);
+ }
+
+ new_start = (char *)cpus + (ncpus * sizeof(struct per_cpu_info));
+ new_space = (new_count - ncpus) * sizeof(struct per_cpu_info);
+ memset(new_start, 0, new_space);
+
+ pdi->ncpus = new_count;
+ pdi->cpus = cpus;
+}
+
+static struct per_cpu_info *get_cpu_info(struct per_dev_info *pdi, int cpu)
+{
+ struct per_cpu_info *pci;
+
+ if (cpu >= pdi->ncpus)
+ resize_cpu_info(pdi, cpu);
+
+ pci = &pdi->cpus[cpu];
+ pci->cpu = cpu;
+ return pci;
+}
+
+
+static int resize_devices(char *name)
+{
+ int size = (ndevices + 1) * sizeof(struct per_dev_info);
+
+ devices = realloc(devices, size);
+ if (!devices) {
+ fprintf(stderr, "Out of memory, device %s (%d)\n", name, size);
+ return 1;
+ }
+ memset(&devices[ndevices], 0, sizeof(struct per_dev_info));
+ devices[ndevices].name = name;
+ ndevices++;
+ return 0;
+}
+
+static struct per_dev_info *get_dev_info(dev_t id)
+{
+ struct per_dev_info *pdi;
+ int i;
+
+ for (i = 0; i < ndevices; i++) {
+ if (!devices[i].id)
+ devices[i].id = id;
+ if (devices[i].id == id)
+ return &devices[i];
+ }
+
+ if (resize_devices(NULL) != 0)
+ return NULL;
+
+ pdi = &devices[ndevices - 1];
+ pdi->id = id;
+ pdi->last_sequence = 0;
+ pdi->last_read_time = 0;
+ return pdi;
+}
+
+static char *get_dev_name(struct per_dev_info *pdi, char *buffer, int size)
+{
+ if (pdi->name)
+ snprintf(buffer, size, "%s", pdi->name);
+ else
+ snprintf(buffer, size, "%d,%d", MAJOR(pdi->id), MINOR(pdi->id));
+ return buffer;
+}
+
+static void check_time(struct per_dev_info *pdi, struct blk_io_trace *bit)
+{
+ unsigned long long this = bit->time;
+ unsigned long long last = pdi->last_reported_time;
+
+ pdi->backwards = (this < last) ? 'B' : ' ';
+ pdi->last_reported_time = this;
+}
+
+static inline void __account_m(struct io_stats *ios, struct blk_io_trace *t,
+ int rw)
{
if (rw) {
- mwrites++;
- qwrite_kb += bytes >> 10;
+ ios->mwrites++;
+ ios->qwrite_kb += t->bytes >> 10;
} else {
- mreads++;
- qread_kb += bytes >> 10;
+ ios->mreads++;
+ ios->qread_kb += t->bytes >> 10;
}
}
-static inline void account_q(int rw, unsigned int bytes)
+static inline void account_m(struct blk_io_trace *t, struct per_cpu_info *pci,
+ int rw)
+{
+ __account_m(&pci->io_stats, t, rw);
+
+ if (per_process_stats) {
+ struct io_stats *ios = find_process_io_stats(t->pid, t->comm);
+
+ __account_m(ios, t, rw);
+ }
+}
+
+static inline void __account_queue(struct io_stats *ios, struct blk_io_trace *t,
+ int rw)
{
if (rw) {
- qwrites++;
- qwrite_kb += bytes >> 10;
+ ios->qwrites++;
+ ios->qwrite_kb += t->bytes >> 10;
} else {
- qreads++;
- qread_kb += bytes >> 10;
+ ios->qreads++;
+ ios->qread_kb += t->bytes >> 10;
}
}
-static inline void account_c(int rw, unsigned int bytes)
+static inline void account_queue(struct blk_io_trace *t,
+ struct per_cpu_info *pci, int rw)
+{
+ __account_queue(&pci->io_stats, t, rw);
+
+ if (per_process_stats) {
+ struct io_stats *ios = find_process_io_stats(t->pid, t->comm);
+
+ __account_queue(ios, t, rw);
+ }
+}
+
+static inline void __account_c(struct io_stats *ios, int rw, unsigned int bytes)
{
if (rw) {
- cwrites++;
- cwrite_kb += bytes >> 10;
+ ios->cwrites++;
+ ios->cwrite_kb += bytes >> 10;
} else {
- creads++;
- cread_kb += bytes >> 10;
+ ios->creads++;
+ ios->cread_kb += bytes >> 10;
}
}
-void output(char *s)
+static inline void account_c(struct blk_io_trace *t, struct per_cpu_info *pci,
+ int rw, int bytes)
{
- printf("%s", s);
- fprintf(current->ofp,"%s",s);
+ __account_c(&pci->io_stats, rw, bytes);
+
+ if (per_process_stats) {
+ struct io_stats *ios = find_process_io_stats(t->pid, t->comm);
+
+ __account_c(ios, rw, bytes);
+ }
}
-char hstring[256];
-char tstring[256];
+static inline void __account_issue(struct io_stats *ios, int rw,
+ unsigned int bytes)
+{
+ if (rw) {
+ ios->iwrites++;
+ ios->iwrite_kb += bytes >> 10;
+ } else {
+ ios->ireads++;
+ ios->iread_kb += bytes >> 10;
+ }
+}
-inline char *setup_header(struct blk_io_trace *t, char act)
+static inline void account_issue(struct blk_io_trace *t,
+ struct per_cpu_info *pci, int rw)
{
- int w = t->action & BLK_TC_ACT(BLK_TC_WRITE);
- int b = t->action & BLK_TC_ACT(BLK_TC_BARRIER);
- int s = t->action & BLK_TC_ACT(BLK_TC_SYNC);
- char rwbs[4];
- int i = 0;
+ __account_issue(&pci->io_stats, rw, t->bytes);
+
+ if (per_process_stats) {
+ struct io_stats *ios = find_process_io_stats(t->pid, t->comm);
- if (w)
- rwbs[i++] = 'W';
+ __account_issue(ios, rw, t->bytes);
+ }
+}
+
+static inline void __account_unplug(struct io_stats *ios, int timer)
+{
+ if (timer)
+ ios->timer_unplugs++;
else
- rwbs[i++] = 'R';
- if (b)
- rwbs[i++] = 'B';
- if (s)
- rwbs[i++] = 'S';
+ ios->io_unplugs++;
+}
- rwbs[i] = '\0';
+static inline void account_unplug(struct blk_io_trace *t,
+ struct per_cpu_info *pci, int timer)
+{
+ __account_unplug(&pci->io_stats, timer);
- sprintf(hstring, "%3d %15ld %12Lu %5u %c %3s", current->cpu,
- (unsigned long)t->sequence, (unsigned long long)t->time, t->pid,
- act, rwbs);
+ if (per_process_stats) {
+ struct io_stats *ios = find_process_io_stats(t->pid, t->comm);
- return hstring;
+ __account_unplug(ios, timer);
+ }
}
-void log_complete(struct blk_io_trace *t, char act)
+static void log_complete(struct per_cpu_info *pci, struct blk_io_trace *t,
+ char *act)
{
- sprintf(tstring,"%s %Lu + %u [%d]\n", setup_header(t, act),
- (unsigned long long)t->sector, t->bytes >> 9, t->error);
- output(tstring);
+ process_fmt(act, pci, t, log_track_complete(t), 0, NULL);
}
-void log_queue(struct blk_io_trace *t, char act)
+static void log_insert(struct per_cpu_info *pci, struct blk_io_trace *t,
+ char *act)
{
- sprintf(tstring,"%s %Lu + %u\n", setup_header(t, act),
- (unsigned long long)t->sector, t->bytes >> 9);
- output(tstring);
+ process_fmt(act, pci, t, log_track_insert(t), 0, NULL);
}
-void log_issue(struct blk_io_trace *t, char act)
+static void log_queue(struct per_cpu_info *pci, struct blk_io_trace *t,
+ char *act)
{
- sprintf(tstring,"%s %Lu + %u\n", setup_header(t, act),
- (unsigned long long)t->sector, t->bytes >> 9);
- output(tstring);
+ process_fmt(act, pci, t, -1, 0, NULL);
}
-void log_merge(struct blk_io_trace *t, char act)
+static void log_issue(struct per_cpu_info *pci, struct blk_io_trace *t,
+ char *act)
{
- sprintf(tstring,"%s %Lu + %u\n", setup_header(t, act),
- (unsigned long long)t->sector, t->bytes >> 9);
- output(tstring);
+ process_fmt(act, pci, t, log_track_issue(t), 0, NULL);
}
-void log_generic(struct blk_io_trace *t, char act)
+static void log_merge(struct per_cpu_info *pci, struct blk_io_trace *t,
+ char *act)
{
- sprintf(tstring,"%s %Lu + %u\n", setup_header(t, act),
- (unsigned long long)t->sector, t->bytes >> 9);
- output(tstring);
+ if (act[0] == 'F')
+ log_track_frontmerge(t);
+
+ process_fmt(act, pci, t, -1ULL, 0, NULL);
}
-void log_pc(struct blk_io_trace *t, char act)
+static void log_action(struct per_cpu_info *pci, struct blk_io_trace *t,
+ char *act)
{
- int i, ret;
- unsigned char buf[64];
-
- sprintf(tstring,"%s\n", setup_header(t, act));
- output(tstring);
+ process_fmt(act, pci, t, -1ULL, 0, NULL);
+}
- if (t->pdu_len > sizeof(buf)) {
- fprintf(stderr, "Payload too large %d\n", t->pdu_len);
- return;
- }
+static void log_generic(struct per_cpu_info *pci, struct blk_io_trace *t,
+ char *act)
+{
+ process_fmt(act, pci, t, -1ULL, 0, NULL);
+}
- ret = read(current->dfd, buf, t->pdu_len);
- if (ret != t->pdu_len) {
- fprintf(stderr,"read(%d) failed on %s - %d\n", t->pdu_len,
- current->dname, ret);
- exit(1);
- }
+static void log_unplug(struct per_cpu_info *pci, struct blk_io_trace *t,
+ char *act)
+{
+ process_fmt(act, pci, t, -1ULL, 0, NULL);
+}
- for (i = 0; i < t->pdu_len; i++) {
- sprintf(tstring,"%02x ", buf[i]);
- output(tstring);
- }
+static void log_split(struct per_cpu_info *pci, struct blk_io_trace *t,
+ char *act)
+{
+ process_fmt(act, pci, t, -1ULL, 0, NULL);
+}
- if (act == 'C') {
- sprintf(tstring,"[%d]", t->error);
- output(tstring);
- }
+static void log_pc(struct per_cpu_info *pci, struct blk_io_trace *t, char *act)
+{
+ unsigned char *buf = (unsigned char *) t + sizeof(*t);
- printf("\n");
+ process_fmt(act, pci, t, -1ULL, t->pdu_len, buf);
}
-void dump_trace_pc(struct blk_io_trace *t)
+static void dump_trace_pc(struct blk_io_trace *t, struct per_cpu_info *pci)
{
- switch (t->action & 0xffff) {
+ int act = t->action & 0xffff;
+
+ switch (act) {
case __BLK_TA_QUEUE:
- log_generic(t, 'Q');
+ log_generic(pci, t, "Q");
break;
case __BLK_TA_GETRQ:
- log_generic(t, 'G');
+ log_generic(pci, t, "G");
break;
case __BLK_TA_SLEEPRQ:
- log_generic(t, 'S');
+ log_generic(pci, t, "S");
break;
case __BLK_TA_REQUEUE:
- log_generic(t, 'R');
+ log_generic(pci, t, "R");
break;
case __BLK_TA_ISSUE:
- log_pc(t, 'D');
+ log_pc(pci, t, "D");
break;
case __BLK_TA_COMPLETE:
- log_pc(t, 'C');
+ log_pc(pci, t, "C");
+ break;
+ case __BLK_TA_INSERT:
+ log_pc(pci, t, "I");
break;
default:
- fprintf(stderr, "Bad pc action %x\n", t->action);
- return;
+ fprintf(stderr, "Bad pc action %x\n", act);
+ break;
}
-
- events++;
}
-void dump_trace_fs(struct blk_io_trace *t)
+static void dump_trace_fs(struct blk_io_trace *t, struct per_cpu_info *pci)
{
int w = t->action & BLK_TC_ACT(BLK_TC_WRITE);
+ int act = t->action & 0xffff;
- switch (t->action & 0xffff) {
+ switch (act) {
case __BLK_TA_QUEUE:
- account_q(w, t->bytes);
- log_queue(t, 'Q');
+ account_queue(t, pci, w);
+ log_queue(pci, t, "Q");
+ break;
+ case __BLK_TA_INSERT:
+ log_insert(pci, t, "I");
break;
case __BLK_TA_BACKMERGE:
- account_m(w, t->bytes);
- log_merge(t, 'M');
+ account_m(t, pci, w);
+ log_merge(pci, t, "M");
break;
case __BLK_TA_FRONTMERGE:
- account_m(w, t->bytes);
- log_merge(t, 'F');
+ account_m(t, pci, w);
+ log_merge(pci, t, "F");
break;
case __BLK_TA_GETRQ:
- log_generic(t, 'G');
+ log_track_getrq(t);
+ log_generic(pci, t, "G");
break;
case __BLK_TA_SLEEPRQ:
- log_generic(t, 'S');
+ log_generic(pci, t, "S");
break;
case __BLK_TA_REQUEUE:
- log_queue(t, 'R');
+ account_c(t, pci, w, -t->bytes);
+ log_queue(pci, t, "R");
break;
case __BLK_TA_ISSUE:
- log_issue(t, 'D');
+ account_issue(t, pci, w);
+ log_issue(pci, t, "D");
break;
case __BLK_TA_COMPLETE:
- account_c(w, t->bytes);
- log_complete(t, 'C');
+ account_c(t, pci, w, t->bytes);
+ log_complete(pci, t, "C");
+ break;
+ case __BLK_TA_PLUG:
+ log_action(pci, t, "P");
+ break;
+ case __BLK_TA_UNPLUG_IO:
+ account_unplug(t, pci, 0);
+ log_unplug(pci, t, "U");
+ break;
+ case __BLK_TA_UNPLUG_TIMER:
+ account_unplug(t, pci, 1);
+ log_unplug(pci, t, "UT");
+ break;
+ case __BLK_TA_SPLIT:
+ log_split(pci, t, "X");
+ break;
+ case __BLK_TA_BOUNCE:
+ log_generic(pci, t, "B");
break;
default:
fprintf(stderr, "Bad fs action %x\n", t->action);
- return;
+ break;
}
-
- events++;
}
-void dump_trace(struct blk_io_trace *t)
+static void dump_trace(struct blk_io_trace *t, struct per_cpu_info *pci,
+ struct per_dev_info *pdi)
{
if (t->action & BLK_TC_ACT(BLK_TC_PC))
- dump_trace_pc(t);
+ dump_trace_pc(t, pci);
else
- dump_trace_fs(t);
+ dump_trace_fs(t, pci);
+
+ pdi->events++;
}
-void show_stats(void)
+static void dump_io_stats(struct io_stats *ios, char *msg)
{
- printf("\nReads:");
- printf("\tQueued: %'8lu, %'8LuKiB\n", qreads, qread_kb);
- printf("\tCompleted: %'8lu, %'8LuKiB\n", creads, cread_kb);
- printf("\tMerges: %'8lu\n", mreads);
+ fprintf(ofp, "%s\n", msg);
+
+ fprintf(ofp, " Reads Queued: %'8lu, %'8LuKiB\t", ios->qreads, ios->qread_kb);
+ fprintf(ofp, " Writes Queued: %'8lu, %'8LuKiB\n", ios->qwrites,ios->qwrite_kb);
+
+ fprintf(ofp, " Read Dispatches: %'8lu, %'8LuKiB\t", ios->ireads, ios->iread_kb);
+ fprintf(ofp, " Write Dispatches: %'8lu, %'8LuKiB\n", ios->iwrites,ios->iwrite_kb);
+ fprintf(ofp, " Reads Completed: %'8lu, %'8LuKiB\t", ios->creads, ios->cread_kb);
+ fprintf(ofp, " Writes Completed: %'8lu, %'8LuKiB\n", ios->cwrites,ios->cwrite_kb);
+ fprintf(ofp, " Read Merges: %'8lu%8c\t", ios->mreads, ' ');
+ fprintf(ofp, " Write Merges: %'8lu\n", ios->mwrites);
+ fprintf(ofp, " IO unplugs: %'8lu%8c\t", ios->io_unplugs, ' ');
+ fprintf(ofp, " Timer unplugs: %'8lu\n", ios->timer_unplugs);
+}
- printf("Writes:");
- printf("\tQueued: %'8lu, %'8LuKiB\n", qwrites, qwrite_kb);
- printf("\tCompleted: %'8lu, %'8LuKiB\n", cwrites, cwrite_kb);
- printf("\tMerges: %'8lu\n", mwrites);
+static void dump_wait_stats(struct per_process_info *ppi)
+{
+ unsigned long rawait = ppi->longest_allocation_wait[0] / 1000;
+ unsigned long rdwait = ppi->longest_dispatch_wait[0] / 1000;
+ unsigned long rcwait = ppi->longest_completion_wait[0] / 1000;
+ unsigned long wawait = ppi->longest_allocation_wait[1] / 1000;
+ unsigned long wdwait = ppi->longest_dispatch_wait[1] / 1000;
+ unsigned long wcwait = ppi->longest_completion_wait[1] / 1000;
+
+ fprintf(ofp, " Allocation wait: %'8lu%8c\t", rawait, ' ');
+ fprintf(ofp, " Allocation wait: %'8lu\n", wawait);
+ fprintf(ofp, " Dispatch wait: %'8lu%8c\t", rdwait, ' ');
+ fprintf(ofp, " Dispatch wait: %'8lu\n", wdwait);
+ fprintf(ofp, " Completion wait: %'8lu%8c\t", rcwait, ' ');
+ fprintf(ofp, " Completion wait: %'8lu\n", wcwait);
+}
+
+static int ppi_name_compare(const void *p1, const void *p2)
+{
+ struct per_process_info *ppi1 = *((struct per_process_info **) p1);
+ struct per_process_info *ppi2 = *((struct per_process_info **) p2);
+ int res;
+
+ res = strverscmp(ppi1->name, ppi2->name);
+ if (!res)
+ res = ppi1->pid > ppi2->pid;
- printf("Events: %'Lu\n", events);
- printf("Missed events: %'Lu\n", missed_events);
+ return res;
}
-int compar(const void *t1, const void *t2)
+static void sort_process_list(void)
{
- long v1 = (long)(((struct blk_io_trace *)t1)->sequence);
- long v2 = (long)(((struct blk_io_trace *)t2)->sequence);
+ struct per_process_info **ppis;
+ struct per_process_info *ppi;
+ int i = 0;
+
+ ppis = malloc(ppi_list_entries * sizeof(struct per_process_info *));
+
+ ppi = ppi_list;
+ while (ppi) {
+ ppis[i++] = ppi;
+ ppi = ppi->list_next;
+ }
+
+ qsort(ppis, ppi_list_entries, sizeof(ppi), ppi_name_compare);
+
+ i = ppi_list_entries - 1;
+ ppi_list = NULL;
+ while (i >= 0) {
+ ppi = ppis[i];
+
+ ppi->list_next = ppi_list;
+ ppi_list = ppi;
+ i--;
+ }
- return v1 - v2;
+ free(ppis);
}
-inline int trace_rb_insert(struct trace *t)
+static void show_process_stats(void)
{
- struct rb_node **p = &rb_root.rb_node;
- struct rb_node *parent = NULL;
- struct trace *__t;
+ struct per_process_info *ppi;
- while (*p) {
- parent = *p;
- __t = rb_entry(parent, struct trace, rb_node);
+ sort_process_list();
- if (t->bit->sequence < __t->bit->sequence)
- p = &(*p)->rb_left;
- else if (t->bit->sequence > __t->bit->sequence)
- p = &(*p)->rb_right;
- else {
- fprintf(stderr, "sequence alias %u!\n", t->bit->sequence);
- return 1;
+ ppi = ppi_list;
+ while (ppi) {
+ char name[64];
+
+ if (ppi->more_than_one)
+ sprintf(name, "%s (%u, ...)", ppi->name, ppi->pid);
+ else
+ sprintf(name, "%s (%u)", ppi->name, ppi->pid);
+
+ dump_io_stats(&ppi->io_stats, name);
+ dump_wait_stats(ppi);
+ ppi = ppi->list_next;
+ }
+
+ fprintf(ofp, "\n");
+}
+
+static void show_device_and_cpu_stats(void)
+{
+ struct per_dev_info *pdi;
+ struct per_cpu_info *pci;
+ struct io_stats total, *ios;
+ int i, j, pci_events;
+ char line[3 + 8/*cpu*/ + 2 + 32/*dev*/ + 3];
+ char name[32];
+
+ for (pdi = devices, i = 0; i < ndevices; i++, pdi++) {
+
+ memset(&total, 0, sizeof(total));
+ pci_events = 0;
+
+ if (i > 0)
+ fprintf(ofp, "\n");
+
+ for (pci = pdi->cpus, j = 0; j < pdi->ncpus; j++, pci++) {
+ if (!pci->nelems)
+ continue;
+
+ ios = &pci->io_stats;
+ total.qreads += ios->qreads;
+ total.qwrites += ios->qwrites;
+ total.creads += ios->creads;
+ total.cwrites += ios->cwrites;
+ total.mreads += ios->mreads;
+ total.mwrites += ios->mwrites;
+ total.ireads += ios->ireads;
+ total.iwrites += ios->iwrites;
+ total.qread_kb += ios->qread_kb;
+ total.qwrite_kb += ios->qwrite_kb;
+ total.cread_kb += ios->cread_kb;
+ total.cwrite_kb += ios->cwrite_kb;
+ total.iread_kb += ios->iread_kb;
+ total.iwrite_kb += ios->iwrite_kb;
+ total.timer_unplugs += ios->timer_unplugs;
+ total.io_unplugs += ios->io_unplugs;
+
+ snprintf(line, sizeof(line) - 1, "CPU%d (%s):",
+ j, get_dev_name(pdi, name, sizeof(name)));
+ dump_io_stats(ios, line);
+ pci_events++;
}
+
+ if (pci_events > 1) {
+ fprintf(ofp, "\n");
+ snprintf(line, sizeof(line) - 1, "Total (%s):",
+ get_dev_name(pdi, name, sizeof(name)));
+ dump_io_stats(&total, line);
+ }
+
+ fprintf(ofp, "\nEvents (%s): %'Lu entries, %'lu skips\n",
+ get_dev_name(pdi, line, sizeof(line)), pdi->events,
+ pdi->skips);
}
+}
- rb_link_node(&t->rb_node, parent, p);
- rb_insert_color(&t->rb_node, &rb_root);
- return 0;
+/*
+ * struct trace and blktrace allocation cache, we do potentially
+ * millions of mallocs for these structures while only using at most
+ * a few thousand at the time
+ */
+static inline void t_free(struct trace *t)
+{
+ t->next = t_alloc_list;
+ t_alloc_list = t;
}
-int sort_entries(void *traces, unsigned long offset)
+static inline struct trace *t_alloc(void)
+{
+ struct trace *t = t_alloc_list;
+
+ if (t) {
+ t_alloc_list = t->next;
+ return t;
+ }
+
+ return malloc(sizeof(*t));
+}
+
+static inline void bit_free(struct blk_io_trace *bit)
+{
+ /*
+ * abuse a 64-bit field for a next pointer for the free item
+ */
+ bit->time = (__u64) (unsigned long) bit_alloc_list;
+ bit_alloc_list = (struct blk_io_trace *) bit;
+}
+
+static inline struct blk_io_trace *bit_alloc(void)
+{
+ struct blk_io_trace *bit = bit_alloc_list;
+
+ if (bit) {
+ bit_alloc_list = (struct blk_io_trace *) (unsigned long) \
+ bit->time;
+ return bit;
+ }
+
+ return malloc(sizeof(*bit));
+}
+
+static void find_genesis(void)
+{
+ struct trace *t = trace_list;
+
+ genesis_time = -1ULL;
+ while (t != NULL) {
+ if (t->bit->time < genesis_time)
+ genesis_time = t->bit->time;
+
+ t = t->next;
+ }
+}
+
+static inline int check_stopwatch(struct blk_io_trace *bit)
+{
+ if (bit->time < stopwatch_end &&
+ bit->time >= stopwatch_start)
+ return 0;
+
+ return 1;
+}
+
+static int sort_entries(void)
{
- struct blk_io_trace *bit;
struct trace *t;
- void *start = traces;
- int nelems = 0;
+ int nr = 0;
- memset(&rb_root, 0, sizeof(rb_root));
+ if (!genesis_time)
+ find_genesis();
- do {
- bit = traces;
- t = malloc(sizeof(*t));
- t->bit = bit;
- memset(&t->rb_node, 0, sizeof(t->rb_node));
+ while ((t = trace_list) != NULL) {
+ struct blk_io_trace *bit = t->bit;
+
+ trace_list = t->next;
+
+ if (verify_trace(bit))
+ continue;
+
+ bit->time -= genesis_time;
+
+ if (check_stopwatch(bit)) {
+ bit_free(bit);
+ t_free(t);
+ continue;
+ }
if (trace_rb_insert(t))
- return -1;
+ break;
- traces += sizeof(*bit) + bit->pdu_len;
- nelems++;
- } while (traces < start + offset);
+ nr++;
+ }
- return nelems;
+ return nr;
}
-void show_entries(void)
+static void show_entries_rb(int force)
{
- struct rb_node *n = rb_first(&rb_root);
+ struct per_dev_info *pdi = NULL;
+ struct per_cpu_info *pci = NULL;
struct blk_io_trace *bit;
+ struct rb_node *n;
struct trace *t;
- int cpu;
- do {
- if (!n)
+ while ((n = rb_first(&rb_sort_root)) != NULL) {
+
+ if (done)
break;
t = rb_entry(n, struct trace, rb_node);
bit = t->bit;
- cpu = bit->magic;
- if (cpu >= MAX_CPUS) {
- fprintf(stderr, "CPU number too large (%d)\n", cpu);
- return;
+ if (!pdi || pdi->id != bit->device)
+ pdi = get_dev_info(bit->device);
+
+ if (!pdi) {
+ fprintf(stderr, "Unknown device ID? (%d,%d)\n",
+ MAJOR(bit->device), MINOR(bit->device));
+ break;
}
- current = &per_file_info[cpu];
+ if (bit->cpu > pdi->ncpus) {
+ fprintf(stderr, "Unknown CPU ID? (%d, device %d,%d)\n",
+ bit->cpu, MAJOR(bit->device),
+ MINOR(bit->device));
+ break;
+ }
/*
- * offset time by first trace event.
- *
- * NOTE: This is *cpu* relative, thus you can not
- * compare times ACROSS cpus.
+ * back off displaying more info if we are out of sync
+ * on SMP systems. to prevent stalling on lost events,
+ * only allow an event to skip us a few times
*/
- if (current->start_time == 0)
- current->start_time = bit->time;
+ if (bit->sequence > (pdi->last_sequence + 1) && !force) {
+ struct trace *__t;
+
+ /*
+ * the wanted sequence is really there, continue
+ * because this means that the log time is earlier
+ * on the trace we have now
+ */
+ __t = trace_rb_find(pdi->id, pdi->last_sequence + 1);
+ if (__t)
+ goto ok;
+
+ if (t->skipped < 5) {
+ t->skipped++;
+ break;
+ } else
+ pdi->skips++;
+ }
+
+ok:
+ if (!force && bit->time > last_allowed_time)
+ break;
+
+ pdi->last_sequence = bit->sequence;
- bit->time -= current->start_time;
+ check_time(pdi, bit);
- dump_trace(bit);
- } while ((n = rb_next(n)) != NULL);
+ if (!pci || pci->cpu != bit->cpu)
+ pci = get_cpu_info(pdi, bit->cpu);
+
+ dump_trace(bit, pci, pdi);
+
+ rb_erase(&t->rb_node, &rb_sort_root);
+ rb_sort_entries--;
+ bit_free(bit);
+ t_free(t);
+ }
}
-int main(int argc, char *argv[])
+static int read_data(int fd, void *buffer, int bytes, int block)
{
- char *dev;
- int i, nfiles, nelems, ret;
- struct per_file_info *pfi;
+ int ret, bytes_left, fl;
+ void *p;
- if (argc != 2) {
- fprintf(stderr, "Usage %s <dev>\n", argv[0]);
- return 1;
+ fl = fcntl(fd, F_GETFL);
+
+ if (!block)
+ fcntl(fd, F_SETFL, fl | O_NONBLOCK);
+ else
+ fcntl(fd, F_SETFL, fl & ~O_NONBLOCK);
+
+ bytes_left = bytes;
+ p = buffer;
+ while (bytes_left > 0) {
+ ret = read(fd, p, bytes_left);
+ if (!ret)
+ return 1;
+ else if (ret < 0) {
+ if (errno != EAGAIN)
+ perror("read");
+
+ return -1;
+ } else {
+ p += ret;
+ bytes_left -= ret;
+ }
}
- dev = argv[1];
+ return 0;
+}
+
+static int read_events(int fd, int always_block)
+{
+ struct per_dev_info *pdi = NULL;
+ int events = 0;
+
+ while (!is_done() && events < rb_batch) {
+ struct blk_io_trace *bit;
+ struct trace *t;
+ int pdu_len;
+ __u32 magic;
- nfiles = nelems = 0;
- for (i = 0, pfi = &per_file_info[0]; i < MAX_CPUS; i++, pfi++) {
- pfi->cpu = i;
- pfi->start_time = 0;
+ bit = bit_alloc();
- pfi->fname = malloc(128);
- sprintf(pfi->fname, "%s_out.%d", dev, i);
- if (stat(pfi->fname, &pfi->stat) < 0)
+ if (read_data(fd, bit, sizeof(*bit), !events || always_block))
break;
- pfi->dname = malloc(128);
- snprintf(pfi->dname, 127, "%s_dat.%d", dev, i);
- pfi->dfd = open(pfi->dname, O_RDONLY);
- if (pfi->dfd < 0) {
- perror(pfi->dname);
- return 1;
+ magic = be32_to_cpu(bit->magic);
+ if ((magic & 0xffffff00) != BLK_IO_TRACE_MAGIC) {
+ fprintf(stderr, "Bad magic %x\n", magic);
+ break;
}
- pfi->ofname = malloc(128);
- snprintf(pfi->ofname, 127, "%s_log.%d", dev, i);
- pfi->ofp = fopen(pfi->ofname, "w");
- if (pfi->ofp == NULL) {
- perror(pfi->ofname);
- return 1;
+ pdu_len = be16_to_cpu(bit->pdu_len);
+ if (pdu_len) {
+ void *ptr = realloc(bit, sizeof(*bit) + pdu_len);
+
+ if (read_data(fd, ptr + sizeof(*bit), pdu_len, 1))
+ break;
+
+ bit = ptr;
+ }
+
+ t = t_alloc();
+ memset(t, 0, sizeof(*t));
+ t->bit = bit;
+
+ trace_to_cpu(bit);
+
+ t->next = trace_list;
+ trace_list = t;
+
+ if (!pdi || pdi->id != bit->device)
+ pdi = get_dev_info(bit->device);
+
+ if (bit->time > pdi->last_read_time)
+ pdi->last_read_time = bit->time;
+
+ events++;
+ }
+
+ return events;
+}
+
+static int do_file(void)
+{
+ struct per_cpu_info *pci;
+ struct per_dev_info *pdi;
+ int i, j, events, events_added;
+
+ /*
+ * first prepare all files for reading
+ */
+ for (i = 0; i < ndevices; i++) {
+ pdi = &devices[i];
+ pdi->nfiles = 0;
+ pdi->last_sequence = 0;
+
+ for (j = 0;; j++) {
+ struct stat st;
+
+ pci = get_cpu_info(pdi, j);
+ pci->cpu = j;
+ pci->fd = -1;
+
+ snprintf(pci->fname, sizeof(pci->fname)-1,
+ "%s.blktrace.%d", pdi->name, pci->cpu);
+ if (stat(pci->fname, &st) < 0)
+ break;
+ if (st.st_size) {
+ pci->fd = open(pci->fname, O_RDONLY);
+ if (pci->fd < 0) {
+ perror(pci->fname);
+ continue;
+ }
+ }
+
+ printf("Input file %s added\n", pci->fname);
+ pdi->nfiles++;
+ }
+ }
+
+ /*
+ * now loop over the files reading in the data
+ */
+ do {
+ events_added = 0;
+ last_allowed_time = -1ULL;
+
+ for (i = 0; i < ndevices; i++) {
+ pdi = &devices[i];
+
+ for (j = 0; j < pdi->nfiles; j++) {
+
+ pci = get_cpu_info(pdi, j);
+
+ if (pci->fd == -1)
+ continue;
+
+ events = read_events(pci->fd, 1);
+ if (!events) {
+ close(pci->fd);
+ pci->fd = -1;
+ continue;
+ }
+
+ if (pdi->last_read_time < last_allowed_time)
+ last_allowed_time = pdi->last_read_time;
+
+ events_added += events;
+ }
}
- printf("Processing %s\n", pfi->fname);
+ if (sort_entries() == -1)
+ break;
+
+ show_entries_rb(0);
+
+ } while (events_added);
- pfi->trace_buf = malloc(pfi->stat.st_size);
+ if (rb_sort_entries)
+ show_entries_rb(1);
- pfi->fd = open(pfi->fname, O_RDONLY);
- if (pfi->fd < 0) {
- perror(pfi->fname);
+ return 0;
+}
+
+static int do_stdin(void)
+{
+ int fd;
+
+ last_allowed_time = -1ULL;
+ fd = dup(STDIN_FILENO);
+ do {
+ int events;
+
+ events = read_events(fd, 0);
+ if (!events)
+ break;
+
+ if (sort_entries() == -1)
+ break;
+
+ show_entries_rb(0);
+ } while (1);
+
+ if (rb_sort_entries)
+ show_entries_rb(1);
+
+ close(fd);
+ return 0;
+}
+
+static void flush_output(void)
+{
+ fflush(ofp);
+}
+
+static void handle_sigint(int sig)
+{
+ done = 1;
+ flush_output();
+}
+
+/*
+ * Extract start and duration times from a string, allowing
+ * us to specify a time interval of interest within a trace.
+ * Format: "duration" (start is zero) or "start:duration".
+ */
+static int find_stopwatch_interval(char *string)
+{
+ double value;
+ char *sp;
+
+ value = strtod(string, &sp);
+ if (sp == string) {
+ fprintf(stderr,"Invalid stopwatch timer: %s\n", string);
+ return 1;
+ }
+ if (*sp == ':') {
+ stopwatch_start = DOUBLE_TO_NANO_ULL(value);
+ string = sp + 1;
+ value = strtod(string, &sp);
+ if (sp == string || *sp != '\0') {
+ fprintf(stderr,"Invalid stopwatch duration time: %s\n",
+ string);
return 1;
}
- if (read(pfi->fd, pfi->trace_buf, pfi->stat.st_size) != pfi->stat.st_size) {
- fprintf(stderr, "error reading\n");
+ } else if (*sp != '\0') {
+ fprintf(stderr,"Invalid stopwatch start timer: %s\n", string);
+ return 1;
+ }
+ stopwatch_end = DOUBLE_TO_NANO_ULL(value);
+ if (stopwatch_end <= stopwatch_start) {
+ fprintf(stderr, "Invalid stopwatch interval: %Lu -> %Lu\n",
+ stopwatch_start, stopwatch_end);
+ return 1;
+ }
+
+ return 0;
+}
+
+static char usage_str[] = \
+ "[ -i <input name> ] [-o <output name> [ -s ] [ -t ] [ -q ]\n" \
+ "[ -w start:stop ] [ -f output format ] [ -F format spec ] [ -v] \n\n" \
+ "\t-i Input file containing trace data, or '-' for stdin\n" \
+ "\t-o Output file. If not given, output is stdout\n" \
+ "\t-b stdin read batching\n" \
+ "\t-s Show per-program io statistics\n" \
+ "\t-n Hash processes by name, not pid\n" \
+ "\t-t Track individual ios. Will tell you the time a request took\n" \
+ "\t to get queued, to get dispatched, and to get completed\n" \
+ "\t-q Quiet. Don't display any stats at the end of the trace\n" \
+ "\t-w Only parse data between the given time interval in seconds.\n" \
+ "\t If 'start' isn't given, blkparse defaults the start time to 0\n" \
+ "\t -f Output format. Customize the output format. The format field\n" \
+ "\t identifies can be found in the documentation\n" \
+ "\t-F Format specification. Can be found in the documentation\n" \
+ "\t-v Print program version info\n\n";
+
+static void usage(char *prog)
+{
+ fprintf(stderr, "Usage: %s %s %s", prog, blkparse_version, usage_str);
+}
+
+int main(int argc, char *argv[])
+{
+ char *ofp_buffer;
+ int c, ret, mode;
+ int per_device_and_cpu_stats = 1;
+
+ while ((c = getopt_long(argc, argv, S_OPTS, l_opts, NULL)) != -1) {
+ switch (c) {
+ case 'i':
+ if (!strcmp(optarg, "-") && !pipeline)
+ pipeline = 1;
+ else if (resize_devices(optarg) != 0)
+ return 1;
+ break;
+ case 'o':
+ output_name = optarg;
+ break;
+ case 'b':
+ rb_batch = atoi(optarg);
+ if (rb_batch <= 0)
+ rb_batch = RB_BATCH_DEFAULT;
+ break;
+ case 's':
+ per_process_stats = 1;
+ break;
+ case 't':
+ track_ios = 1;
+ break;
+ case 'q':
+ per_device_and_cpu_stats = 0;
+ break;
+ case 'w':
+ if (find_stopwatch_interval(optarg) != 0)
+ return 1;
+ break;
+ case 'f':
+ set_all_format_specs(optarg);
+ break;
+ case 'F':
+ if (add_format_spec(optarg) != 0)
+ return 1;
+ break;
+ case 'n':
+ ppi_hash_by_pid = 0;
+ break;
+ case 'v':
+ printf("%s version %s\n", argv[0], blkparse_version);
+ return 0;
+ default:
+ usage(argv[0]);
return 1;
}
+ }
- ret = sort_entries(pfi->trace_buf, pfi->stat.st_size);
- if (ret == -1)
+ while (optind < argc) {
+ if (!strcmp(argv[optind], "-") && !pipeline)
+ pipeline = 1;
+ else if (resize_devices(argv[optind]) != 0)
return 1;
+ optind++;
+ }
+
+ if (!pipeline && !ndevices) {
+ usage(argv[0]);
+ return 1;
+ }
- close(pfi->fd);
- nfiles++;
- pfi->nelems = ret;
- nelems += pfi->nelems;
- printf("\t%2d %10s %15d\n", i, pfi->fname, pfi->nelems);
+ memset(&rb_sort_root, 0, sizeof(rb_sort_root));
+ memset(&rb_track_root, 0, sizeof(rb_track_root));
+ signal(SIGINT, handle_sigint);
+ signal(SIGHUP, handle_sigint);
+ signal(SIGTERM, handle_sigint);
+
+ setlocale(LC_NUMERIC, "en_US");
+
+ if (!output_name) {
+ ofp = fdopen(STDOUT_FILENO, "w");
+ mode = _IOLBF;
+ } else {
+ char ofname[128];
+
+ snprintf(ofname, sizeof(ofname) - 1, "%s", output_name);
+ ofp = fopen(ofname, "w");
+ mode = _IOFBF;
}
- show_entries();
+ if (!ofp) {
+ perror("fopen");
+ return 1;
+ }
- show_stats();
- return 0;
-}
+ ofp_buffer = malloc(4096);
+ if (setvbuf(ofp, ofp_buffer, mode, 4096)) {
+ perror("setvbuf");
+ return 1;
+ }
+ if (pipeline)
+ ret = do_stdin();
+ else
+ ret = do_file();
+ if (per_process_stats)
+ show_process_stats();
+
+ if (per_device_and_cpu_stats)
+ show_device_and_cpu_stats();
+
+ flush_output();
+ return ret;
+}
projects / blktrace.git / blobdiff