#include <errno.h>
#include <signal.h>
#include <locale.h>
+#include <limits.h>
#include "blktrace.h"
#include "rbtree.h"
+#include "jhash.h"
-#define SECONDS(x) ((unsigned long long)(x) / 1000000000)
-#define NANO_SECONDS(x) ((unsigned long long)(x) % 1000000000)
+static char blkparse_version[] = "0.90";
-static int backwards;
-static unsigned long long genesis_time, last_reported_time;
-
-struct io_stats {
- unsigned long qreads, qwrites, creads, cwrites, mreads, mwrites;
- unsigned long ireads, iwrites;
- unsigned long long qread_kb, qwrite_kb, cread_kb, cwrite_kb;
- unsigned long long iread_kb, iwrite_kb;
-};
-
-struct per_cpu_info {
- int cpu;
- int nelems;
-
- int fd;
- char fname[128];
+struct per_dev_info {
+ dev_t id;
+ char *name;
+ 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 nfiles;
+ int ncpus;
+ struct per_cpu_info *cpus;
};
struct per_process_info {
__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];
};
#define PPI_HASH_SHIFT (8)
-static struct per_process_info *ppi_hash[1 << PPI_HASH_SHIFT];
+#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:s"
+#define S_OPTS "i:o:b:stqw:f:F:vn"
static struct option l_opts[] = {
{
.name = "input",
- .has_arg = 1,
+ .has_arg = required_argument,
.flag = NULL,
.val = 'i'
},
{
.name = "output",
- .has_arg = 1,
+ .has_arg = required_argument,
.flag = NULL,
.val = 'o'
},
{
.name = "batch",
- .has_arg = 1,
+ .has_arg = required_argument,
.flag = NULL,
.val = 'b'
},
{
.name = "per program stats",
- .has_arg = 0,
+ .has_arg = no_argument,
.flag = NULL,
.val = 's'
},
{
- .name = NULL,
- .has_arg = 0,
+ .name = "track ios",
+ .has_arg = no_argument,
.flag = NULL,
- .val = 0
- }
+ .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'
+ },
};
-static struct rb_root rb_root;
-
+/*
+ * for sorting the displayed output
+ */
struct trace {
struct blk_io_trace *bit;
struct rb_node rb_node;
+ struct trace *next;
+ int skipped;
+};
+
+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 max_cpus;
-static struct per_cpu_info *per_cpu_info;
+static int ndevices;
+static struct per_dev_info *devices;
+static char *get_dev_name(struct per_dev_info *, char *, int);
-static unsigned long long events;
+FILE *ofp = NULL;
+static char *output_name;
-static char *dev, *output_name;
-static FILE *ofp;
+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 (1024)
+#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;
-static inline unsigned long hash_long(unsigned long val)
+#define JHASH_RANDOM (0x3af5f2ee)
+
+static inline int ppi_hash_pid(__u32 pid)
{
- const unsigned int bpl = 8 * sizeof(long);
+ return jhash_1word(pid, JHASH_RANDOM) & PPI_HASH_MASK;
+}
- /*
- * assuming 32 or 64-bit
- */
- if (bpl == 32)
- val *= 0x9e370001UL;
- else
- val *= 0x9e37fffffffc0001UL;
+static inline int ppi_hash_name(const char *name)
+{
+ return jhash(name, 16, JHASH_RANDOM) & PPI_HASH_MASK;
+}
- return val >> (bpl - PPI_HASH_SHIFT);
+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 = hash_long(ppi->pid);
+ const int hash_idx = ppi_hash(ppi);
- ppi->hash_next = ppi_hash[hash_idx];
- ppi_hash[hash_idx] = 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 = hash_long(pid);
+ const int hash_idx = ppi_hash_pid(pid);
struct per_process_info *ppi;
- ppi = ppi_hash[hash_idx];
+ ppi = ppi_hash_table[hash_idx];
while (ppi) {
if (ppi->pid == pid)
return ppi;
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;
+ }
+ }
+
+ rb_link_node(&iot->rb_node, parent, p);
+ rb_insert_color(&iot->rb_node, &rb_track_root);
+ return 0;
+}
+
+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_by_pid(pid);
+ struct per_process_info *ppi = find_process(pid, name);
if (!ppi) {
ppi = malloc(sizeof(*ppi));
memset(ppi, 0, sizeof(*ppi));
- strncpy(ppi->name, name, sizeof(ppi->name));
+ 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(int cpuid)
+static void resize_cpu_info(struct per_dev_info *pdi, int cpu)
{
- int new_space, new_max = cpuid + 1;
+ struct per_cpu_info *cpus = pdi->cpus;
+ int ncpus = pdi->ncpus;
+ int new_count = cpu + 1;
+ int new_space, size;
char *new_start;
- per_cpu_info = realloc(per_cpu_info, new_max * sizeof(*per_cpu_info));
- if (!per_cpu_info) {
- fprintf(stderr, "Cannot allocate CPU info -- %d x %d bytes\n",
- new_max, (int) sizeof(*per_cpu_info));
+ 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 *)per_cpu_info + (max_cpus * sizeof(*per_cpu_info));
- new_space = (new_max - max_cpus) * sizeof(*per_cpu_info);
+ 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);
- max_cpus = new_max;
+
+ pdi->ncpus = new_count;
+ pdi->cpus = cpus;
}
-static struct per_cpu_info *get_cpu_info(int cpu)
+static struct per_cpu_info *get_cpu_info(struct per_dev_info *pdi, int cpu)
{
struct per_cpu_info *pci;
- if (cpu >= max_cpus)
- resize_cpu_info(cpu);
+ if (cpu >= pdi->ncpus)
+ resize_cpu_info(pdi, cpu);
- /*
- * ->cpu might already be set, but just set it unconditionally
- */
- pci = &per_cpu_info[cpu];
+ pci = &pdi->cpus[cpu];
pci->cpu = cpu;
-
return pci;
}
-static inline void check_time(struct blk_io_trace *bit)
+
+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 = last_reported_time;
+ unsigned long long last = pdi->last_reported_time;
- backwards = (this < last) ? 'B' : ' ';
- last_reported_time = this;
+ pdi->backwards = (this < last) ? 'B' : ' ';
+ pdi->last_reported_time = this;
}
static inline void __account_m(struct io_stats *ios, struct blk_io_trace *t,
}
}
-static inline void __account_q(struct io_stats *ios, struct blk_io_trace *t,
- int rw)
+static inline void __account_queue(struct io_stats *ios, struct blk_io_trace *t,
+ int rw)
{
if (rw) {
ios->qwrites++;
}
}
-static inline void account_q(struct blk_io_trace *t, struct per_cpu_info *pci,
- int rw)
+static inline void account_queue(struct blk_io_trace *t,
+ struct per_cpu_info *pci, int rw)
{
- __account_q(&pci->io_stats, t, 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_q(ios, t, rw);
+ __account_queue(ios, t, rw);
}
}
}
}
-static inline void __account_i(struct io_stats *ios, int rw, unsigned int bytes)
+static inline void __account_issue(struct io_stats *ios, int rw,
+ unsigned int bytes)
{
if (rw) {
ios->iwrites++;
}
}
-static inline void account_i(struct blk_io_trace *t, struct per_cpu_info *pci,
- int rw)
+static inline void account_issue(struct blk_io_trace *t,
+ struct per_cpu_info *pci, int rw)
{
- __account_i(&pci->io_stats, rw, t->bytes);
+ __account_issue(&pci->io_stats, rw, t->bytes);
if (per_process_stats) {
struct io_stats *ios = find_process_io_stats(t->pid, t->comm);
- __account_i(ios, rw, t->bytes);
+ __account_issue(ios, rw, t->bytes);
}
}
-static void output(struct per_cpu_info *pci, char *s)
+static inline void __account_unplug(struct io_stats *ios, int timer)
{
- fprintf(ofp, "%s", s);
+ if (timer)
+ ios->timer_unplugs++;
+ else
+ ios->io_unplugs++;
}
-static char hstring[256];
-static char tstring[256];
-
-static inline char *setup_header(struct per_cpu_info *pci,
- struct blk_io_trace *t, char act)
+static inline void account_unplug(struct blk_io_trace *t,
+ struct per_cpu_info *pci, int timer)
{
- 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;
-
- if (w)
- rwbs[i++] = 'W';
- else
- rwbs[i++] = 'R';
- if (b)
- rwbs[i++] = 'B';
- if (s)
- rwbs[i++] = 'S';
-
- rwbs[i] = '\0';
+ __account_unplug(&pci->io_stats, timer);
- sprintf(hstring, "%c %3d %15ld %5Lu.%09Lu %5u %c %3s", backwards,
- pci->cpu,
- (unsigned long)t->sequence, SECONDS(t->time),
- NANO_SECONDS(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);
+ }
}
static void log_complete(struct per_cpu_info *pci, struct blk_io_trace *t,
- char act)
+ char *act)
{
- sprintf(tstring,"%s %Lu + %u [%d]\n", setup_header(pci, t, act),
- (unsigned long long)t->sector, t->bytes >> 9, t->error);
- output(pci, tstring);
+ process_fmt(act, pci, t, log_track_complete(t), 0, NULL);
+}
+
+static void log_insert(struct per_cpu_info *pci, struct blk_io_trace *t,
+ char *act)
+{
+ process_fmt(act, pci, t, log_track_insert(t), 0, NULL);
}
static void log_queue(struct per_cpu_info *pci, struct blk_io_trace *t,
- char act)
+ char *act)
{
- sprintf(tstring,"%s %Lu + %u [%s]\n", setup_header(pci, t, act),
- (unsigned long long)t->sector, t->bytes >> 9, t->comm);
- output(pci, tstring);
+ process_fmt(act, pci, t, -1, 0, NULL);
}
static void log_issue(struct per_cpu_info *pci, struct blk_io_trace *t,
- char act)
+ char *act)
{
- sprintf(tstring,"%s %Lu + %u [%s]\n", setup_header(pci, t, act),
- (unsigned long long)t->sector, t->bytes >> 9, t->comm);
- output(pci, tstring);
+ process_fmt(act, pci, t, log_track_issue(t), 0, NULL);
}
static void log_merge(struct per_cpu_info *pci, struct blk_io_trace *t,
- char act)
+ char *act)
+{
+ if (act[0] == 'F')
+ log_track_frontmerge(t);
+
+ process_fmt(act, pci, t, -1ULL, 0, NULL);
+}
+
+static void log_action(struct per_cpu_info *pci, struct blk_io_trace *t,
+ char *act)
{
- sprintf(tstring,"%s %Lu + %u [%s]\n", setup_header(pci, t, act),
- (unsigned long long)t->sector, t->bytes >> 9, t->comm);
- output(pci, tstring);
+ process_fmt(act, pci, t, -1ULL, 0, NULL);
}
static void log_generic(struct per_cpu_info *pci, struct blk_io_trace *t,
- char act)
+ char *act)
{
- sprintf(tstring,"%s %Lu + %u [%s]\n", setup_header(pci, t, act),
- (unsigned long long)t->sector, t->bytes >> 9, t->comm);
- output(pci, tstring);
+ process_fmt(act, pci, t, -1ULL, 0, NULL);
}
-static int log_pc(struct per_cpu_info *pci, struct blk_io_trace *t, char act)
+static void log_unplug(struct per_cpu_info *pci, struct blk_io_trace *t,
+ char *act)
{
- unsigned char *buf;
- int i;
+ process_fmt(act, pci, t, -1ULL, 0, NULL);
+}
- sprintf(tstring,"%s ", setup_header(pci, t, act));
- output(pci, 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);
+}
- buf = (unsigned char *) t + sizeof(*t);
- for (i = 0; i < t->pdu_len; i++) {
- sprintf(tstring,"%02x ", buf[i]);
- output(pci, 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);
- if (act == 'C') {
- sprintf(tstring,"[%d]\n", t->error);
- output(pci, tstring);
- } else {
- sprintf(tstring,"[%s]\n", t->comm);
- output(pci, tstring);
- }
- return 0;
+ process_fmt(act, pci, t, -1ULL, t->pdu_len, buf);
}
-static int dump_trace_pc(struct blk_io_trace *t, struct per_cpu_info *pci)
+static void dump_trace_pc(struct blk_io_trace *t, struct per_cpu_info *pci)
{
- int ret = 0;
+ int act = t->action & 0xffff;
- switch (t->action & 0xffff) {
+ switch (act) {
case __BLK_TA_QUEUE:
- log_generic(pci, t, 'Q');
+ log_generic(pci, t, "Q");
break;
case __BLK_TA_GETRQ:
- log_generic(pci, t, 'G');
+ log_generic(pci, t, "G");
break;
case __BLK_TA_SLEEPRQ:
- log_generic(pci, t, 'S');
+ log_generic(pci, t, "S");
break;
case __BLK_TA_REQUEUE:
- log_generic(pci, t, 'R');
+ log_generic(pci, t, "R");
break;
case __BLK_TA_ISSUE:
- ret = log_pc(pci, t, 'D');
+ log_pc(pci, t, "D");
break;
case __BLK_TA_COMPLETE:
- log_pc(pci, 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);
- ret = 1;
+ fprintf(stderr, "Bad pc action %x\n", act);
break;
}
-
- return ret;
}
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(t, pci, w);
- log_queue(pci, 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(t, pci, w);
- log_merge(pci, t, 'M');
+ log_merge(pci, t, "M");
break;
case __BLK_TA_FRONTMERGE:
account_m(t, pci, w);
- log_merge(pci, t, 'F');
+ log_merge(pci, t, "F");
break;
case __BLK_TA_GETRQ:
- log_generic(pci, t, 'G');
+ log_track_getrq(t);
+ log_generic(pci, t, "G");
break;
case __BLK_TA_SLEEPRQ:
- log_generic(pci, t, 'S');
+ log_generic(pci, t, "S");
break;
case __BLK_TA_REQUEUE:
account_c(t, pci, w, -t->bytes);
- log_queue(pci, t, 'R');
+ log_queue(pci, t, "R");
break;
case __BLK_TA_ISSUE:
- account_i(t, pci, w);
- log_issue(pci, t, 'D');
+ account_issue(t, pci, w);
+ log_issue(pci, t, "D");
break;
case __BLK_TA_COMPLETE:
account_c(t, pci, w, t->bytes);
- log_complete(pci, t, 'C');
+ 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);
}
}
-static int dump_trace(struct blk_io_trace *t, struct per_cpu_info *pci)
+static void dump_trace(struct blk_io_trace *t, struct per_cpu_info *pci,
+ struct per_dev_info *pdi)
{
- int ret = 0;
-
if (t->action & BLK_TC_ACT(BLK_TC_PC))
- ret = dump_trace_pc(t, pci);
+ dump_trace_pc(t, pci);
else
dump_trace_fs(t, pci);
- events++;
- return ret;
+ pdi->events++;
}
static void dump_io_stats(struct io_stats *ios, char *msg)
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);
}
-static void show_process_stats(void)
+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;
+
+ return res;
+}
+
+static void sort_process_list(void)
+{
+ 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) {
- dump_io_stats(&ppi->io_stats, ppi->name);
+ ppis[i++] = ppi;
ppi = ppi->list_next;
}
- fprintf(ofp, "\n");
+ 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--;
+ }
+
+ free(ppis);
}
-static void show_cpu_stats(void)
+static void show_process_stats(void)
{
- struct per_cpu_info foo, *pci;
- struct io_stats *ios;
- int i, pci_events = 0;
+ struct per_process_info *ppi;
- memset(&foo, 0, sizeof(foo));
+ sort_process_list();
- for (i = 0; i < max_cpus; i++) {
- char cpu[8];
+ ppi = ppi_list;
+ while (ppi) {
+ char name[64];
- pci = &per_cpu_info[i];
- ios = &pci->io_stats;
+ if (ppi->more_than_one)
+ sprintf(name, "%s (%u, ...)", ppi->name, ppi->pid);
+ else
+ sprintf(name, "%s (%u)", ppi->name, ppi->pid);
- if (!pci->nelems)
- continue;
+ 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++;
+ }
- foo.io_stats.qreads += ios->qreads;
- foo.io_stats.qwrites += ios->qwrites;
- foo.io_stats.creads += ios->creads;
- foo.io_stats.cwrites += ios->cwrites;
- foo.io_stats.mreads += ios->mreads;
- foo.io_stats.mwrites += ios->mwrites;
- foo.io_stats.qread_kb += ios->qread_kb;
- foo.io_stats.qwrite_kb += ios->qwrite_kb;
- foo.io_stats.cread_kb += ios->cread_kb;
- foo.io_stats.cwrite_kb += ios->cwrite_kb;
+ 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);
+ }
- snprintf(cpu, sizeof(cpu) - 1, "CPU%d:", i);
- dump_io_stats(ios, cpu);
- pci_events++;
+ fprintf(ofp, "\nEvents (%s): %'Lu entries, %'lu skips\n",
+ get_dev_name(pdi, line, sizeof(line)), pdi->events,
+ pdi->skips);
}
+}
+
+/*
+ * 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;
+}
+
+static inline struct trace *t_alloc(void)
+{
+ struct trace *t = t_alloc_list;
- if (pci_events > 1) {
- fprintf(ofp, "\n");
- dump_io_stats(&foo.io_stats, "Total:");
+ if (t) {
+ t_alloc_list = t->next;
+ return t;
}
- fprintf(ofp, "\nEvents: %'Lu\n", events);
+ return malloc(sizeof(*t));
}
-static inline int trace_rb_insert(struct trace *t)
+static inline void bit_free(struct blk_io_trace *bit)
{
- struct rb_node **p = &rb_root.rb_node;
- struct rb_node *parent = NULL;
- struct trace *__t;
+ /*
+ * 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;
+}
- while (*p) {
- parent = *p;
- __t = rb_entry(parent, struct trace, rb_node);
+static inline struct blk_io_trace *bit_alloc(void)
+{
+ struct blk_io_trace *bit = bit_alloc_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!\n");
- return 1;
- }
+ if (bit) {
+ bit_alloc_list = (struct blk_io_trace *) (unsigned long) \
+ bit->time;
+ return bit;
}
- rb_link_node(&t->rb_node, parent, p);
- rb_insert_color(&t->rb_node, &rb_root);
- return 0;
+ return malloc(sizeof(*bit));
}
-#define min(a, b) ((a) < (b) ? (a) : (b))
-
-static struct blk_io_trace *find_trace(void *p, unsigned long offset, int nr)
+static void find_genesis(void)
{
- unsigned long max_offset = min(offset,nr * sizeof(struct blk_io_trace));
- unsigned long off;
- struct blk_io_trace *bit;
- __u32 magic;
+ struct trace *t = trace_list;
- for (off = 0; off < max_offset; off++) {
- bit = p + off;
+ genesis_time = -1ULL;
+ while (t != NULL) {
+ if (t->bit->time < genesis_time)
+ genesis_time = t->bit->time;
- magic = be32_to_cpu(bit->magic);
- if ((magic & 0xffffff00) == BLK_IO_TRACE_MAGIC)
- return bit;
+ t = t->next;
}
+}
- return NULL;
+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 *traces, unsigned long offset, int nr)
+static int sort_entries(void)
{
- struct per_cpu_info *pci;
- struct blk_io_trace *bit;
struct trace *t;
- void *start = traces;
- int nelems = 0;
+ int nr = 0;
- while (traces - start <= offset - sizeof(*bit)) {
- if (!nr)
- break;
+ if (!genesis_time)
+ find_genesis();
- bit = find_trace(traces, offset - (traces - start), nr);
- if (!bit)
- break;
-
- 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_to_cpu(bit);
+ trace_list = t->next;
if (verify_trace(bit))
- break;
+ continue;
- pci = get_cpu_info(bit->cpu);
- pci->nelems++;
+ 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++;
- nr--;
+ nr++;
}
- return nelems;
-}
-
-static void free_entries_rb(void)
-{
- struct rb_node *n;
-
- while ((n = rb_first(&rb_root)) != NULL) {
- struct trace *t = rb_entry(n, struct trace, rb_node);
-
- rb_erase(&t->rb_node, &rb_root);
- free(t);
- }
+ return nr;
}
-static void show_entries_rb(void)
+static void show_entries_rb(int force)
{
+ 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;
- n = rb_first(&rb_root);
- if (!n)
- return;
+ while ((n = rb_first(&rb_sort_root)) != NULL) {
+
+ if (done)
+ break;
- do {
t = rb_entry(n, struct trace, rb_node);
bit = t->bit;
- cpu = bit->cpu;
- if (cpu > max_cpus) {
- fprintf(stderr, "CPU number too large (%d)\n", cpu);
+ 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;
}
- if (genesis_time == 0)
- genesis_time = bit->time;
- bit->time -= genesis_time;
+ if (bit->cpu > pdi->ncpus) {
+ fprintf(stderr, "Unknown CPU ID? (%d, device %d,%d)\n",
+ bit->cpu, MAJOR(bit->device),
+ MINOR(bit->device));
+ break;
+ }
- check_time(bit);
+ /*
+ * 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 (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++;
+ }
- if (dump_trace(bit, &per_cpu_info[cpu]))
+ok:
+ if (!force && bit->time > last_allowed_time)
break;
- } while ((n = rb_next(n)) != NULL);
+ pdi->last_sequence = bit->sequence;
+
+ check_time(pdi, bit);
+
+ 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);
+ }
}
static int read_data(int fd, void *buffer, int bytes, int block)
else if (ret < 0) {
if (errno != EAGAIN)
perror("read");
+
return -1;
} else {
p += ret;
return 0;
}
-static int do_file(void)
+static int read_events(int fd, int always_block)
{
- int i, nfiles;
+ struct per_dev_info *pdi = NULL;
+ int events = 0;
- for (i = 0, nfiles = 0;; i++, nfiles++) {
- struct per_cpu_info *pci;
- struct stat st;
- void *tb;
+ while (!is_done() && events < rb_batch) {
+ struct blk_io_trace *bit;
+ struct trace *t;
+ int pdu_len;
+ __u32 magic;
- pci = get_cpu_info(i);
+ bit = bit_alloc();
- snprintf(pci->fname, sizeof(pci->fname)-1,"%s_out.%d", dev, i);
- if (stat(pci->fname, &st) < 0)
+ if (read_data(fd, bit, sizeof(*bit), !events || always_block))
break;
- if (!st.st_size)
- continue;
- printf("Processing %s\n", pci->fname);
+ magic = be32_to_cpu(bit->magic);
+ if ((magic & 0xffffff00) != BLK_IO_TRACE_MAGIC) {
+ fprintf(stderr, "Bad magic %x\n", magic);
+ break;
+ }
- tb = malloc(st.st_size);
+ pdu_len = be16_to_cpu(bit->pdu_len);
+ if (pdu_len) {
+ void *ptr = realloc(bit, sizeof(*bit) + pdu_len);
- pci->fd = open(pci->fname, O_RDONLY);
- if (pci->fd < 0) {
- perror(pci->fname);
- break;
+ if (read_data(fd, ptr + sizeof(*bit), pdu_len, 1))
+ break;
+
+ bit = ptr;
}
- if (read_data(pci->fd, tb, st.st_size, 1))
- break;
+ t = t_alloc();
+ memset(t, 0, sizeof(*t));
+ t->bit = bit;
- if (sort_entries(tb, st.st_size, ~0U) == -1)
- break;
+ trace_to_cpu(bit);
- close(pci->fd);
- printf("\t%2d %10s %15d\n", i, pci->fname, pci->nelems);
+ t->next = trace_list;
+ trace_list = t;
- }
+ if (!pdi || pdi->id != bit->device)
+ pdi = get_dev_info(bit->device);
- if (!nfiles) {
- fprintf(stderr, "No files found\n");
- return 1;
+ if (bit->time > pdi->last_read_time)
+ pdi->last_read_time = bit->time;
+
+ events++;
}
- show_entries_rb();
- return 0;
+ return events;
}
-static void resize_buffer(void **buffer, long *size, long offset)
+static int do_file(void)
{
- long old_size = *size;
+ struct per_cpu_info *pci;
+ struct per_dev_info *pdi;
+ int i, j, events, events_added;
- *size *= 2;
- *buffer = realloc(*buffer, *size);
- memset(*buffer + offset, 0, *size - old_size);
-}
+ /*
+ * first prepare all files for reading
+ */
+ for (i = 0; i < ndevices; i++) {
+ pdi = &devices[i];
+ pdi->nfiles = 0;
+ pdi->last_sequence = 0;
-static int read_sort_events(int fd, void **buffer)
-{
- long offset, max_offset;
- int events;
+ for (j = 0;; j++) {
+ struct stat st;
- max_offset = 128 * sizeof(struct blk_io_trace);
- *buffer = malloc(max_offset);
- events = 0;
- offset = 0;
+ 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 {
- struct blk_io_trace *t;
- int pdu_len;
+ events_added = 0;
+ last_allowed_time = -1ULL;
- if (max_offset - offset < sizeof(*t))
- resize_buffer(buffer, &max_offset, offset);
+ for (i = 0; i < ndevices; i++) {
+ pdi = &devices[i];
- if (read_data(fd, *buffer + offset, sizeof(*t), !events)) {
- if (events)
- break;
+ for (j = 0; j < pdi->nfiles; j++) {
- usleep(1000);
- continue;
- }
+ pci = get_cpu_info(pdi, j);
- t = *buffer + offset;
- offset += sizeof(*t);
+ if (pci->fd == -1)
+ continue;
- pdu_len = be16_to_cpu(t->pdu_len);
- if (pdu_len) {
- if (max_offset - offset < pdu_len)
- resize_buffer(buffer, &max_offset, offset);
+ events = read_events(pci->fd, 1);
+ if (!events) {
+ close(pci->fd);
+ pci->fd = -1;
+ continue;
+ }
- if (read_data(fd, *buffer + offset, pdu_len, 1))
- break;
+ if (pdi->last_read_time < last_allowed_time)
+ last_allowed_time = pdi->last_read_time;
- offset += pdu_len;
+ events_added += events;
+ }
}
- events++;
- } while (!is_done() && events < rb_batch);
+ if (sort_entries() == -1)
+ break;
- return events;
+ show_entries_rb(0);
+
+ } while (events_added);
+
+ if (rb_sort_entries)
+ show_entries_rb(1);
+
+ return 0;
}
static int do_stdin(void)
{
int fd;
- void *ptr;
+ last_allowed_time = -1ULL;
fd = dup(STDIN_FILENO);
do {
int events;
- events = read_sort_events(fd, &ptr);
+ events = read_events(fd, 0);
if (!events)
break;
- if (sort_entries(ptr, ~0UL, events) == -1)
+ if (sort_entries() == -1)
break;
- show_entries_rb();
- free_entries_rb();
+ show_entries_rb(0);
} while (1);
+ if (rb_sort_entries)
+ show_entries_rb(1);
+
close(fd);
- free(ptr);
return 0;
}
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;
+ }
+ } 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 -i <name> [-o <output>][-s]\n", prog);
+ fprintf(stderr, "Usage: %s %s %s", prog, blkparse_version, usage_str);
}
int main(int argc, char *argv[])
{
char *ofp_buffer;
- int c, ret;
+ 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':
- dev = strdup(optarg);
+ if (!strcmp(optarg, "-") && !pipeline)
+ pipeline = 1;
+ else if (resize_devices(optarg) != 0)
+ return 1;
break;
case 'o':
- output_name = strdup(optarg);
+ output_name = optarg;
break;
case 'b':
rb_batch = atoi(optarg);
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;
}
}
- if (!dev) {
+ 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;
}
- memset(&rb_root, 0, sizeof(rb_root));
+ 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);
setlocale(LC_NUMERIC, "en_US");
- if (!output_name)
+ if (!output_name) {
ofp = fdopen(STDOUT_FILENO, "w");
- else {
+ mode = _IOLBF;
+ } else {
char ofname[128];
- snprintf(ofname, sizeof(ofname) - 1, "%s.log", output_name);
+ snprintf(ofname, sizeof(ofname) - 1, "%s", output_name);
ofp = fopen(ofname, "w");
+ mode = _IOFBF;
}
if (!ofp) {
}
ofp_buffer = malloc(4096);
- if (setvbuf(ofp, ofp_buffer, _IOFBF, 4096)) {
+ if (setvbuf(ofp, ofp_buffer, mode, 4096)) {
perror("setvbuf");
return 1;
}
- if (!strcmp(dev, "-"))
+ if (pipeline)
ret = do_stdin();
else
ret = do_file();
if (per_process_stats)
show_process_stats();
- show_cpu_stats();
+ if (per_device_and_cpu_stats)
+ show_device_and_cpu_stats();
flush_output();
return ret;
projects / blktrace.git / blobdiff