return true;
}
-static void bch2_quantiles_update(struct quantiles *q, u64 v)
-{
- unsigned i = 0;
-
- while (i < ARRAY_SIZE(q->entries)) {
- struct quantile_entry *e = q->entries + i;
-
- if (unlikely(!e->step)) {
- e->m = v;
- e->step = max_t(unsigned, v / 2, 1024);
- } else if (e->m > v) {
- e->m = e->m >= e->step
- ? e->m - e->step
- : 0;
- } else if (e->m < v) {
- e->m = e->m + e->step > e->m
- ? e->m + e->step
- : U32_MAX;
- }
-
- if ((e->m > v ? e->m - v : v - e->m) < e->step)
- e->step = max_t(unsigned, e->step / 2, 1);
-
- if (v >= e->m)
- break;
-
- i = eytzinger0_child(i, v > e->m);
- }
-}
-
void bch2_prt_u64_binary(struct printbuf *out, u64 v, unsigned nr_bits)
{
while (nr_bits)
if (!*p)
break;
lines = p + 1;
- prefix = KERN_CONT;
}
console_unlock();
}
-int bch2_prt_backtrace(struct printbuf *out, struct task_struct *task)
+int bch2_save_backtrace(bch_stacktrace *stack, struct task_struct *task)
{
- unsigned long entries[32];
- unsigned i, nr_entries;
- int ret;
+ unsigned nr_entries = 0;
+ int ret = 0;
- ret = down_read_killable(&task->signal->exec_update_lock);
+ stack->nr = 0;
+ ret = darray_make_room(stack, 32);
if (ret)
return ret;
- nr_entries = stack_trace_save_tsk(task, entries, ARRAY_SIZE(entries), 0);
- for (i = 0; i < nr_entries; i++) {
- prt_printf(out, "[<0>] %pB", (void *)entries[i]);
+ if (!down_read_trylock(&task->signal->exec_update_lock))
+ return -1;
+
+ do {
+ nr_entries = stack_trace_save_tsk(task, stack->data, stack->size, 0);
+ } while (nr_entries == stack->size &&
+ !(ret = darray_make_room(stack, stack->size * 2)));
+
+ stack->nr = nr_entries;
+ up_read(&task->signal->exec_update_lock);
+
+ return ret;
+}
+
+void bch2_prt_backtrace(struct printbuf *out, bch_stacktrace *stack)
+{
+ unsigned long *i;
+
+ darray_for_each(*stack, i) {
+ prt_printf(out, "[<0>] %pB", (void *) *i);
prt_newline(out);
}
+}
- up_read(&task->signal->exec_update_lock);
- return 0;
+int bch2_prt_task_backtrace(struct printbuf *out, struct task_struct *task)
+{
+ bch_stacktrace stack = { 0 };
+ int ret = bch2_save_backtrace(&stack, task);
+
+ bch2_prt_backtrace(out, &stack);
+ darray_exit(&stack);
+ return ret;
}
/* time stats: */
-static inline void bch2_time_stats_update_one(struct time_stats *stats,
+#ifndef CONFIG_BCACHEFS_NO_LATENCY_ACCT
+static void bch2_quantiles_update(struct bch2_quantiles *q, u64 v)
+{
+ unsigned i = 0;
+
+ while (i < ARRAY_SIZE(q->entries)) {
+ struct bch2_quantile_entry *e = q->entries + i;
+
+ if (unlikely(!e->step)) {
+ e->m = v;
+ e->step = max_t(unsigned, v / 2, 1024);
+ } else if (e->m > v) {
+ e->m = e->m >= e->step
+ ? e->m - e->step
+ : 0;
+ } else if (e->m < v) {
+ e->m = e->m + e->step > e->m
+ ? e->m + e->step
+ : U32_MAX;
+ }
+
+ if ((e->m > v ? e->m - v : v - e->m) < e->step)
+ e->step = max_t(unsigned, e->step / 2, 1);
+
+ if (v >= e->m)
+ break;
+
+ i = eytzinger0_child(i, v > e->m);
+ }
+}
+
+static inline void bch2_time_stats_update_one(struct bch2_time_stats *stats,
u64 start, u64 end)
{
u64 duration, freq;
if (time_after64(end, start)) {
duration = end - start;
- stats->duration_stats = mean_and_variance_update_inlined(stats->duration_stats,
- duration);
- stats->duration_stats_weighted = mean_and_variance_weighted_update(
- stats->duration_stats_weighted,
- duration);
+ mean_and_variance_update(&stats->duration_stats, duration);
+ mean_and_variance_weighted_update(&stats->duration_stats_weighted, duration);
stats->max_duration = max(stats->max_duration, duration);
stats->min_duration = min(stats->min_duration, duration);
bch2_quantiles_update(&stats->quantiles, duration);
if (time_after64(end, stats->last_event)) {
freq = end - stats->last_event;
- stats->freq_stats = mean_and_variance_update_inlined(stats->freq_stats, freq);
- stats->freq_stats_weighted = mean_and_variance_weighted_update(
- stats->freq_stats_weighted,
- freq);
+ mean_and_variance_update(&stats->freq_stats, freq);
+ mean_and_variance_weighted_update(&stats->freq_stats_weighted, freq);
stats->max_freq = max(stats->max_freq, freq);
stats->min_freq = min(stats->min_freq, freq);
stats->last_event = end;
}
}
-static noinline void bch2_time_stats_clear_buffer(struct time_stats *stats,
- struct time_stat_buffer *b)
+static noinline void bch2_time_stats_clear_buffer(struct bch2_time_stats *stats,
+ struct bch2_time_stat_buffer *b)
{
- struct time_stat_buffer_entry *i;
+ struct bch2_time_stat_buffer_entry *i;
unsigned long flags;
spin_lock_irqsave(&stats->lock, flags);
b->nr = 0;
}
-void __bch2_time_stats_update(struct time_stats *stats, u64 start, u64 end)
+void __bch2_time_stats_update(struct bch2_time_stats *stats, u64 start, u64 end)
{
unsigned long flags;
if (mean_and_variance_weighted_get_mean(stats->freq_stats_weighted) < 32 &&
stats->duration_stats.n > 1024)
stats->buffer =
- alloc_percpu_gfp(struct time_stat_buffer,
+ alloc_percpu_gfp(struct bch2_time_stat_buffer,
GFP_ATOMIC);
spin_unlock_irqrestore(&stats->lock, flags);
} else {
- struct time_stat_buffer *b;
+ struct bch2_time_stat_buffer *b;
preempt_disable();
b = this_cpu_ptr(stats->buffer);
BUG_ON(b->nr >= ARRAY_SIZE(b->entries));
- b->entries[b->nr++] = (struct time_stat_buffer_entry) {
+ b->entries[b->nr++] = (struct bch2_time_stat_buffer_entry) {
.start = start,
.end = end
};
preempt_enable();
}
}
+#endif
static const struct time_unit {
const char *name;
{ "us", NSEC_PER_USEC },
{ "ms", NSEC_PER_MSEC },
{ "s", NSEC_PER_SEC },
- { "m", NSEC_PER_SEC * 60},
- { "h", NSEC_PER_SEC * 3600},
+ { "m", (u64) NSEC_PER_SEC * 60},
+ { "h", (u64) NSEC_PER_SEC * 3600},
{ "eon", U64_MAX },
};
return u;
}
-static void pr_time_units(struct printbuf *out, u64 ns)
+void bch2_pr_time_units(struct printbuf *out, u64 ns)
+{
+ const struct time_unit *u = pick_time_units(ns);
+
+ prt_printf(out, "%llu %s", div_u64(ns, u->nsecs), u->name);
+}
+
+static void bch2_pr_time_units_aligned(struct printbuf *out, u64 ns)
{
const struct time_unit *u = pick_time_units(ns);
{
prt_str(out, name);
prt_tab(out);
- pr_time_units(out, ns);
+ bch2_pr_time_units_aligned(out, ns);
prt_newline(out);
}
-void bch2_time_stats_to_text(struct printbuf *out, struct time_stats *stats)
+void bch2_time_stats_to_text(struct printbuf *out, struct bch2_time_stats *stats)
{
const struct time_unit *u;
s64 f_mean = 0, d_mean = 0;
prt_printf(out, "mean:");
prt_tab(out);
- pr_time_units(out, d_mean);
+ bch2_pr_time_units_aligned(out, d_mean);
prt_tab(out);
- pr_time_units(out, mean_and_variance_weighted_get_mean(stats->duration_stats_weighted));
+ bch2_pr_time_units_aligned(out, mean_and_variance_weighted_get_mean(stats->duration_stats_weighted));
prt_newline(out);
prt_printf(out, "stddev:");
prt_tab(out);
- pr_time_units(out, d_stddev);
+ bch2_pr_time_units_aligned(out, d_stddev);
prt_tab(out);
- pr_time_units(out, mean_and_variance_weighted_get_stddev(stats->duration_stats_weighted));
+ bch2_pr_time_units_aligned(out, mean_and_variance_weighted_get_stddev(stats->duration_stats_weighted));
printbuf_indent_sub(out, 2);
prt_newline(out);
prt_printf(out, "mean:");
prt_tab(out);
- pr_time_units(out, f_mean);
+ bch2_pr_time_units_aligned(out, f_mean);
prt_tab(out);
- pr_time_units(out, mean_and_variance_weighted_get_mean(stats->freq_stats_weighted));
+ bch2_pr_time_units_aligned(out, mean_and_variance_weighted_get_mean(stats->freq_stats_weighted));
prt_newline(out);
prt_printf(out, "stddev:");
prt_tab(out);
- pr_time_units(out, f_stddev);
+ bch2_pr_time_units_aligned(out, f_stddev);
prt_tab(out);
- pr_time_units(out, mean_and_variance_weighted_get_stddev(stats->freq_stats_weighted));
+ bch2_pr_time_units_aligned(out, mean_and_variance_weighted_get_stddev(stats->freq_stats_weighted));
printbuf_indent_sub(out, 2);
prt_newline(out);
}
}
-void bch2_time_stats_exit(struct time_stats *stats)
+void bch2_time_stats_exit(struct bch2_time_stats *stats)
{
free_percpu(stats->buffer);
}
-void bch2_time_stats_init(struct time_stats *stats)
+void bch2_time_stats_init(struct bch2_time_stats *stats)
{
memset(stats, 0, sizeof(*stats));
- stats->duration_stats_weighted.w = 8;
- stats->freq_stats_weighted.w = 8;
+ stats->duration_stats_weighted.weight = 8;
+ stats->freq_stats_weighted.weight = 8;
stats->min_duration = U64_MAX;
stats->min_freq = U64_MAX;
spin_lock_init(&stats->lock);
int bch2_bio_alloc_pages(struct bio *bio, size_t size, gfp_t gfp_mask)
{
while (size) {
- struct page *page = alloc_page(gfp_mask);
+ struct page *page = alloc_pages(gfp_mask, 0);
unsigned len = min_t(size_t, PAGE_SIZE, size);
if (!page)
projects / bcachefs-tools-debian / blobdiff