#include <signal.h>
#include <locale.h>
#include <limits.h>
-#include <ctype.h>
#include "blktrace.h"
#include "rbtree.h"
+#include "jhash.h"
static char blkparse_version[] = "0.90";
-#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 MINORBITS 20
-#define MINORMASK ((1U << MINORBITS) - 1)
-#define MAJOR(dev) ((unsigned int) ((dev) >> MINORBITS))
-#define MINOR(dev) ((unsigned int) ((dev) & MINORMASK))
-
-#define min(a, b) ((a) < (b) ? (a) : (b))
-
-#define HEADER "%D %2c %8s %5T.%9t %5p %2a %3d "
-
-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;
- unsigned long io_unplugs, timer_unplugs;
-};
-
-struct per_cpu_info {
- int cpu;
- int nelems;
-
- int fd;
- char fname[128];
-
- struct io_stats io_stats;
-};
-
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;
};
__u32 pid;
struct io_stats io_stats;
struct per_process_info *hash_next, *list_next;
+ int more_than_one;
/*
* individual io stats
};
#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:stqw:f:F:v"
+#define S_OPTS "i:o:b:stqw:f:F:vn"
static struct option l_opts[] = {
{
.name = "input",
.flag = NULL,
.val = 'F'
},
+ {
+ .name = "hash by name",
+ .has_arg = no_argument,
+ .flag = NULL,
+ .val = 'n'
+ },
{
.name = "version",
.has_arg = no_argument,
};
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
*/
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;
static struct per_dev_info *devices;
static char *get_dev_name(struct per_dev_info *, char *, int);
-static FILE *ofp;
+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 (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)
+{
+ 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 __WORDSIZE == 32
- val *= 0x9e370001UL;
-#elif __WORDSIZE == 64
- val *= 0x9e37fffffffc0001UL;
-#else
-#error unknown word size
-#endif
+ if (ppi_hash_by_pid)
+ return ppi_hash_pid(ppi->pid);
- return val >> (__WORDSIZE - PPI_HASH_SHIFT);
+ 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_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;
- if (genesis_time == 0 || t->bit->time < genesis_time)
- genesis_time = t->bit->time;
-
while (*p) {
parent = *p;
__t = rb_entry(parent, struct trace, rb_node);
}
}
+ 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;
return NULL;
}
-static struct io_track *find_track(__u32 pid, dev_t device, __u64 sector)
+static struct io_track *find_track(__u32 pid, char *comm, dev_t device,
+ __u64 sector)
{
struct io_track *iot;
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);
if (!track_ios)
return;
- iot = find_track(t->pid, t->device, t->sector);
+ iot = find_track(t->pid, t->comm, t->device, t->sector);
iot->allocation_time = t->time;
}
if (!track_ios)
return -1;
- iot = find_track(t->pid, t->device, t->sector);
+ 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_by_pid(iot->pid);
+ 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])
elapsed = iot->dispatch_time - iot->queue_time;
if (per_process_stats) {
- struct per_process_info *ppi = find_process_by_pid(iot->pid);
+ 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])
elapsed = iot->completion_time - iot->dispatch_time;
if (per_process_stats) {
- struct per_process_info *ppi = find_process_by_pid(iot->pid);
+ 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])
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(struct per_dev_info *pdi, int cpu)
{
struct per_cpu_info *cpus = pdi->cpus;
struct per_dev_info *pdi;
int i;
- for (i = 0; i < ndevices; 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 = -1;
+ pdi->last_sequence = 0;
+ pdi->last_read_time = 0;
return pdi;
}
}
}
-#define VALID_SPECS "BCDFGMPQRSTU"
-static char *override_format[256];
-static inline int valid_spec(int spec)
-{
- return strchr(VALID_SPECS, spec) != NULL;
-}
-
-static void set_all_format_specs(char *optarg)
-{
- char *p;
-
- for (p = VALID_SPECS; *p; p++)
- if (override_format[(int)(*p)] == NULL)
- override_format[(int)(*p)] = strdup(optarg);
-}
-
-static int add_format_spec(char *optarg)
-{
- int spec = optarg[0];
-
- if (!valid_spec(spec)) {
- fprintf(stderr,"Bad format specifier %c\n", spec);
- return 1;
- }
- if (optarg[1] != ',') {
- fprintf(stderr,"Bad format specifier - need ',' %s\n", optarg);
- return 1;
- }
- optarg += 2;
- if (*optarg == '\0') {
- fprintf(stderr,"Bad format specifier - need fmt %s\n", optarg);
- return 1;
- }
-
- /*
- * Set both merges (front and back)
- */
- if (spec == 'M') {
- override_format['B'] = strdup(optarg);
- override_format['M'] = strdup(optarg);
- } else
- override_format[spec] = strdup(optarg);
-
- return 0;
-}
-
-static void print_field(char *act, struct per_cpu_info *pci,
- struct blk_io_trace *t, unsigned long long elapsed,
- int pdu_len, unsigned char *pdu_buf, char field,
- int minus, int has_w, int width)
-{
- char format[64];
-
- if (has_w) {
- if (minus)
- sprintf(format, "%%-%d", width);
- else
- sprintf(format, "%%%d", width);
- } else
- sprintf(format, "%%");
-
- switch (field) {
- case 'a':
- fprintf(ofp, strcat(format, "s"), act);
- break;
- case 'c':
- fprintf(ofp, strcat(format, "d"), pci->cpu);
- break;
- case 'C':
- fprintf(ofp, strcat(format, "s"), t->comm);
- break;
- case 'd': {
- char rwbs[4];
- int i = 0;
- 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);
- if (w)
- rwbs[i++] = 'W';
- else
- rwbs[i++] = 'R';
- if (b)
- rwbs[i++] = 'B';
- if (s)
- rwbs[i++] = 'S';
- rwbs[i] = '\0';
- fprintf(ofp, strcat(format, "s"), rwbs);
- break;
- }
- case 'D': /* format width ignored */
- fprintf(ofp,"%3d,%-3d", MAJOR(t->device), MINOR(t->device));
- break;
- case 'e':
- fprintf(ofp, strcat(format, "d"), t->error);
- break;
- case 'M':
- fprintf(ofp, strcat(format, "d"), MAJOR(t->device));
- break;
- case 'm':
- fprintf(ofp, strcat(format, "d"), MINOR(t->device));
- break;
- case 'n':
- fprintf(ofp, strcat(format, "u"), t->bytes >> 9);
- break;
- case 'p':
- fprintf(ofp, strcat(format, "u"), t->pid);
- break;
- case 'P': /* format width ignored */
- if ((pdu_len > 0) && (pdu_buf != NULL)) {
- int i;
- unsigned char *p = pdu_buf;
- for (i = 0; i < pdu_len; i++) {
- if (i)
- fprintf(ofp, " ");
-
- fprintf(ofp, "%02x", *p++);
- }
- }
- break;
- case 's':
- fprintf(ofp, strcat(format, "ld"), t->sequence);
- break;
- case 'S':
- fprintf(ofp, strcat(format, "lu"), t->sector);
- break;
- case 't':
- sprintf(format, "%%0%dlu", has_w ? width : 9);
- fprintf(ofp, format, NANO_SECONDS(t->time));
- break;
- case 'T':
- fprintf(ofp, strcat(format, "d"), SECONDS(t->time));
- break;
- case 'u':
- if (elapsed == -1ULL) {
- fprintf(stderr, "Expecting elapsed value\n");
- exit(1);
- }
- fprintf(ofp, strcat(format, "llu"), elapsed / 1000);
- break;
- case 'U': {
- __u64 *depth = (__u64 *) ((char *) t + sizeof(*t));
- fprintf(ofp, strcat(format, "u"),
- (unsigned int) be64_to_cpu(*depth));
- break;
- }
- default:
- fprintf(ofp,strcat(format, "c"), field);
- break;
- }
-}
-
-static char *parse_field(char *act, struct per_cpu_info *pci,
- struct blk_io_trace *t, unsigned long long elapsed,
- int pdu_len, unsigned char *pdu_buf,
- char *master_format)
-{
- int minus = 0;
- int has_w = 0;
- int width = 0;
- char *p = master_format;
-
- if (*p == '-') {
- minus = 1;
- p++;
- }
- if (isdigit(*p)) {
- has_w = 1;
- do {
- width = (width * 10) + (*p++ - '0');
- } while ((*p) && (isdigit(*p)));
- }
- if (*p) {
- print_field(act, pci, t, elapsed, pdu_len, pdu_buf, *p++,
- minus, has_w, width);
- }
- return p;
-}
-
-static char *fmt_select(int fmt_spec, struct blk_io_trace *t,
- unsigned long long elapsed)
-{
- char *fmt;
- char scratch_format[1024];
-
- if (override_format[fmt_spec] != NULL)
- return override_format[fmt_spec];
-
- switch (fmt_spec) {
- case 'C': /* Complete */
- if (t->action & BLK_TC_ACT(BLK_TC_PC)) {
- strcpy(scratch_format, HEADER);
- strcat(scratch_format, "(%P) ");
- } else {
- strcpy(scratch_format, HEADER "%S + %n ");
- if (elapsed != -1ULL)
- strcat(scratch_format, "(%8u) ");
- }
- strcat(scratch_format, "[%e]\n");
- fmt = scratch_format;
- break;
-
- case 'D': /* Issue */
- if (t->action & BLK_TC_ACT(BLK_TC_PC)) {
- strcpy(scratch_format, HEADER);
- strcat(scratch_format, "%n (%P) ");
- } else {
- strcpy(scratch_format, HEADER "%S + %n ");
- if (elapsed != -1ULL)
- strcat(scratch_format, "(%8u) ");
- }
- strcat(scratch_format,"[%C]\n");
- fmt = scratch_format;
- break;
-
- case 'I': /* Insert */
- if (t->action & BLK_TC_ACT(BLK_TC_PC)) {
- strcpy(scratch_format, HEADER);
- strcat(scratch_format, "%n (%P) ");
- } else {
- strcpy(scratch_format, HEADER "%S + %n ");
- if (elapsed != -1ULL)
- strcat(scratch_format, "(%8u) ");
- }
- strcat(scratch_format,"[%C]\n");
- fmt = scratch_format;
- break;
-
- case 'Q': /* Queue */
- case 'W': /* Bounce */
- strcpy(scratch_format, HEADER "%S + %n ");
- if (elapsed != -1ULL)
- strcat(scratch_format, "(%8u) ");
- strcat(scratch_format,"[%C]\n");
- fmt = scratch_format;
- break;
-
- case 'B': /* Back merge */
- case 'F': /* Front merge */
- case 'M': /* Front or back merge */
- fmt = HEADER "%S + %n [%C]\n";
- break;
-
- case 'P': /* Plug */
- fmt = HEADER "[%C]\n";
- break;
-
- case 'G': /* Get request */
- case 'S': /* Sleep request */
- fmt = HEADER "%S + %n [%C]\n";
- break;
-
- case 'U': /* Unplug IO */
- case 'T': /* Unplug timer */
- fmt = HEADER "[%C] %U\n";
- break;
-
- case 'X': /* Split */
- strcpy(scratch_format, HEADER "%S / %U ");
- strcat(scratch_format,"[%C]\n");
- fmt = scratch_format;
- break;
-
- default:
- fprintf(stderr,"FATAL: Invalid format spec %c\n", fmt_spec);
- exit(1);
- /*NOTREACHED*/
- }
-
- return fmt;
-}
-
-static void process_fmt(char *act, struct per_cpu_info *pci,
- struct blk_io_trace *t, unsigned long long elapsed,
- int pdu_len, unsigned char *pdu_buf)
-{
- char *p = fmt_select(act[0], t, elapsed);
-
- while (*p) {
- switch (*p) {
- case '%': /* Field specifier */
- p++;
- if (*p == '%')
- fprintf(ofp, "%c", *p++);
- else if (!*p)
- fprintf(ofp, "%c", '%');
- else
- p = parse_field(act, pci, t, elapsed,
- pdu_len, pdu_buf, p);
- break;
- case '\\': { /* escape */
- switch (p[1]) {
- case 'b': fprintf(ofp, "\b"); break;
- case 'n': fprintf(ofp, "\n"); break;
- case 'r': fprintf(ofp, "\r"); break;
- case 't': fprintf(ofp, "\t"); break;
- default:
- fprintf(stderr,
- "Invalid escape char in format %c\n",
- p[1]);
- exit(1);
- /*NOTREACHED*/
- }
- p += 2;
- break;
- }
- default:
- fprintf(ofp, "%c", *p++);
- break;
- }
- }
-}
-
static void log_complete(struct per_cpu_info *pci, struct blk_io_trace *t,
char *act)
{
while (ppi) {
char name[64];
- snprintf(name, sizeof(name)-1, "%s (%u)", ppi->name, ppi->pid);
+ 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;
}
}
-static struct blk_io_trace *find_trace(void *p, unsigned long offset)
+/*
+ * 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)
{
- unsigned long max_offset = offset;
- unsigned long off;
- struct blk_io_trace *bit;
- __u32 magic;
+ t->next = t_alloc_list;
+ t_alloc_list = t;
+}
- for (off = 0; off < max_offset; off++) {
- bit = p + off;
+static inline struct trace *t_alloc(void)
+{
+ struct trace *t = t_alloc_list;
- magic = be32_to_cpu(bit->magic);
- if ((magic & 0xffffff00) == BLK_IO_TRACE_MAGIC)
- return bit;
+ if (t) {
+ t_alloc_list = t->next;
+ return t;
}
- return NULL;
+ return malloc(sizeof(*t));
}
-static inline int verify_and_add_trace(struct trace *t)
+static inline void bit_free(struct blk_io_trace *bit)
{
- if (verify_trace(t->bit))
- return 1;
- if (trace_rb_insert(t))
- return 1;
+ /*
+ * 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;
+}
- return 0;
+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 trace *t;
int nr = 0;
+ if (!genesis_time)
+ find_genesis();
+
while ((t = trace_list) != NULL) {
+ struct blk_io_trace *bit = t->bit;
+
trace_list = t->next;
- verify_and_add_trace(t);
+
+ 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))
+ break;
+
nr++;
}
return nr;
}
-static void show_entries_rb(int piped)
+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;
- __u32 device = 0;
- int cpu = 0;
- n = rb_first(&rb_sort_root);
- while (n != NULL) {
+ while ((n = rb_first(&rb_sort_root)) != NULL) {
if (done)
break;
t = rb_entry(n, struct trace, rb_node);
bit = t->bit;
- if (!pdi || device != bit->device) {
- device = bit->device;
- pdi = get_dev_info(device);
- }
+ if (!pdi || pdi->id != bit->device)
+ pdi = get_dev_info(bit->device);
if (!pdi) {
fprintf(stderr, "Unknown device ID? (%d,%d)\n",
if (bit->cpu > pdi->ncpus) {
fprintf(stderr, "Unknown CPU ID? (%d, device %d,%d)\n",
- cpu, MAJOR(bit->device), MINOR(bit->device));
+ bit->cpu, MAJOR(bit->device),
+ MINOR(bit->device));
break;
}
- if (!pci || cpu != bit->cpu) {
- cpu = bit->cpu;
- pci = get_cpu_info(pdi, cpu);
- }
-
/*
* 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 us a few times
+ * only allow an event to skip us a few times
*/
- if (bit->sequence != (pdi->last_sequence + 1)
- && pdi->last_sequence != -1) {
- if (piped && t->skipped < 5) {
+ 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 {
- fprintf(stderr, "skipping from %lu to %u\n", pdi->last_sequence, bit->sequence);
+ } else
pdi->skips++;
- }
}
+ok:
+ if (!force && bit->time > last_allowed_time)
+ break;
+
pdi->last_sequence = bit->sequence;
- bit->time -= genesis_time;
- if (bit->time >= stopwatch_end)
- break;
+ check_time(pdi, bit);
- if (bit->time >= stopwatch_start) {
- check_time(pdi, bit);
+ if (!pci || pci->cpu != bit->cpu)
+ pci = get_cpu_info(pdi, bit->cpu);
- dump_trace(bit, pci, pdi);
- }
+ dump_trace(bit, pci, pdi);
- if (piped) {
- rb_erase(&t->rb_node, &rb_sort_root);
- free(bit);
- free(t);
- n = rb_first(&rb_sort_root);
- } else
- n = rb_next(n);
+ rb_erase(&t->rb_node, &rb_sort_root);
+ rb_sort_entries--;
+ bit_free(bit);
+ t_free(t);
}
}
else if (ret < 0) {
if (errno != EAGAIN)
perror("read");
+
return -1;
} else {
p += ret;
return 0;
}
-/*
- * Find the traces in 'tb' and add them to the list for sorting and
- * displaying
- */
-static int find_sort_entries(void *tb, unsigned long size)
+static int read_events(int fd, int always_block)
{
- struct blk_io_trace *bit;
- struct trace *t;
- void *start = tb;
- int nr = 0;
+ 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;
+
+ bit = bit_alloc();
- while (tb - start <= size - sizeof(*bit)) {
- bit = find_trace(tb, size - (tb - start));
- if (!bit)
+ if (read_data(fd, bit, sizeof(*bit), !events || always_block))
break;
- t = malloc(sizeof(*t));
+ magic = be32_to_cpu(bit->magic);
+ if ((magic & 0xffffff00) != BLK_IO_TRACE_MAGIC) {
+ fprintf(stderr, "Bad magic %x\n", magic);
+ break;
+ }
+
+ 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);
- verify_and_add_trace(t);
+ t->next = trace_list;
+ trace_list = t;
- tb += sizeof(*bit) + bit->pdu_len;
- nr++;
+ 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 nr;
+ return events;
}
static int do_file(void)
{
- int i, j, nfiles = 0;
+ 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++) {
- for (j = 0;; j++, nfiles++) {
- struct per_dev_info *pdi;
- struct per_cpu_info *pci;
+ pdi = &devices[i];
+ pdi->nfiles = 0;
+ pdi->last_sequence = 0;
+
+ for (j = 0;; j++) {
struct stat st;
- void *tb;
- pdi = &devices[i];
- pdi->last_sequence = -1;
pci = get_cpu_info(pdi, j);
pci->cpu = j;
+ pci->fd = -1;
snprintf(pci->fname, sizeof(pci->fname)-1,
- "%s.blktrace.%d", pdi->name, j);
+ "%s.blktrace.%d", pdi->name, pci->cpu);
if (stat(pci->fname, &st) < 0)
break;
- if (!st.st_size)
- continue;
-
- printf("Processing %s\n", pci->fname);
-
- tb = malloc(st.st_size);
- if (!tb) {
- fprintf(stderr, "Out of memory, skip file %s\n",
- pci->fname);
- continue;
+ if (st.st_size) {
+ pci->fd = open(pci->fname, O_RDONLY);
+ if (pci->fd < 0) {
+ perror(pci->fname);
+ continue;
+ }
}
- pci->fd = open(pci->fname, O_RDONLY);
- if (pci->fd < 0) {
- perror(pci->fname);
- free(tb);
- continue;
- }
-
- if (read_data(pci->fd, tb, st.st_size, 1)) {
- close(pci->fd);
- free(tb);
- continue;
- }
-
- pci->nelems = find_sort_entries(tb, st.st_size);
-
- printf("Completed %s (CPU%d %d, entries)\n",
- pci->fname, j, pci->nelems);
- close(pci->fd);
+ printf("Input file %s added\n", pci->fname);
+ pdi->nfiles++;
}
}
- if (!nfiles) {
- fprintf(stderr, "No files found\n");
- return 1;
- }
-
- show_entries_rb(0);
- return 0;
-}
-
-static int read_sort_events(int fd)
-{
- int events = 0;
-
+ /*
+ * now loop over the files reading in the data
+ */
do {
- struct blk_io_trace *bit;
- struct trace *t;
- int pdu_len;
- __u32 magic;
+ events_added = 0;
+ last_allowed_time = -1ULL;
- bit = malloc(sizeof(*bit));
+ for (i = 0; i < ndevices; i++) {
+ pdi = &devices[i];
- if (read_data(fd, bit, sizeof(*bit), !events))
- break;
+ for (j = 0; j < pdi->nfiles; j++) {
- magic = be32_to_cpu(bit->magic);
- if ((magic & 0xffffff00) != BLK_IO_TRACE_MAGIC) {
- fprintf(stderr, "Bad magic %x\n", magic);
- break;
- }
+ pci = get_cpu_info(pdi, j);
- pdu_len = be16_to_cpu(bit->pdu_len);
- if (pdu_len) {
- void *ptr = realloc(bit, sizeof(*bit) + pdu_len);
+ if (pci->fd == -1)
+ continue;
- if (read_data(fd, ptr + sizeof(*bit), pdu_len, 1))
- break;
+ events = read_events(pci->fd, 1);
+ if (!events) {
+ close(pci->fd);
+ pci->fd = -1;
+ continue;
+ }
- bit = ptr;
+ if (pdi->last_read_time < last_allowed_time)
+ last_allowed_time = pdi->last_read_time;
+
+ events_added += events;
+ }
}
- t = malloc(sizeof(*t));
- memset(t, 0, sizeof(*t));
- t->bit = bit;
+ if (sort_entries() == -1)
+ break;
- trace_to_cpu(bit);
- t->next = trace_list;
- trace_list = t;
+ show_entries_rb(0);
- events++;
- } while (!is_done() && events < rb_batch);
+ } while (events_added);
- return events;
+ if (rb_sort_entries)
+ show_entries_rb(1);
+
+ return 0;
}
static int do_stdin(void)
{
int fd;
+ last_allowed_time = -1ULL;
fd = dup(STDIN_FILENO);
do {
int events;
- events = read_sort_events(fd);
+ events = read_events(fd, 0);
if (!events)
break;
if (sort_entries() == -1)
break;
- show_entries_rb(1);
+ show_entries_rb(0);
} while (1);
+ if (rb_sort_entries)
+ show_entries_rb(1);
+
close(fd);
return 0;
}
"\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" \
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;
} 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;
}
projects / blktrace.git / blobdiff