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ceph: add IO size metrics support

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This will collect IO's total size and then calculate the average
size, and also will collect the min/max IO sizes.

The debugfs will show the size metrics in bytes and will let the
userspace applications to switch to what they need.

URL: https://tracker.ceph.com/issues/49913
Signed-off-by: Xiubo Li <xiubli@redhat.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
This commit is contained in:
Xiubo Li
2021-05-13 09:40:53 +08:00
committed by Ilya Dryomov
parent fc123d5f50
commit 903f4fec78
5 changed files with 119 additions and 28 deletions
Download Patch File Download Diff File Expand all files Collapse all files
fs/ceph/debugfs.c
+33 -4
View File
@@ -127,7 +127,7 @@ static int mdsc_show(struct seq_file *s, void *p)
return 0;
}
#define CEPH_METRIC_SHOW(name, total, avg, min, max, sq) { \
#define CEPH_LAT_METRIC_SHOW(name, total, avg, min, max, sq) { \
s64 _total, _avg, _min, _max, _sq, _st; \
_avg = ktime_to_us(avg); \
_min = ktime_to_us(min == KTIME_MAX ? 0 : min); \
@@ -140,6 +140,12 @@ static int mdsc_show(struct seq_file *s, void *p)
name, total, _avg, _min, _max, _st); \
}
#define CEPH_SZ_METRIC_SHOW(name, total, avg, min, max, sum) { \
u64 _min = min == U64_MAX ? 0 : min; \
seq_printf(s, "%-14s%-12lld%-16llu%-16llu%-16llu%llu\n", \
name, total, avg, _min, max, sum); \
}
static int metric_show(struct seq_file *s, void *p)
{
struct ceph_fs_client *fsc = s->private;
@@ -147,6 +153,7 @@ static int metric_show(struct seq_file *s, void *p)
struct ceph_client_metric *m = &mdsc->metric;
int nr_caps = 0;
s64 total, sum, avg, min, max, sq;
u64 sum_sz, avg_sz, min_sz, max_sz;
sum = percpu_counter_sum(&m->total_inodes);
seq_printf(s, "item total\n");
@@ -170,7 +177,7 @@ static int metric_show(struct seq_file *s, void *p)
max = m->read_latency_max;
sq = m->read_latency_sq_sum;
spin_unlock(&m->read_metric_lock);
CEPH_METRIC_SHOW("read", total, avg, min, max, sq);
CEPH_LAT_METRIC_SHOW("read", total, avg, min, max, sq);
spin_lock(&m->write_metric_lock);
total = m->total_writes;
@@ -180,7 +187,7 @@ static int metric_show(struct seq_file *s, void *p)
max = m->write_latency_max;
sq = m->write_latency_sq_sum;
spin_unlock(&m->write_metric_lock);
CEPH_METRIC_SHOW("write", total, avg, min, max, sq);
CEPH_LAT_METRIC_SHOW("write", total, avg, min, max, sq);
spin_lock(&m->metadata_metric_lock);
total = m->total_metadatas;
@@ -190,7 +197,29 @@ static int metric_show(struct seq_file *s, void *p)
max = m->metadata_latency_max;
sq = m->metadata_latency_sq_sum;
spin_unlock(&m->metadata_metric_lock);
CEPH_METRIC_SHOW("metadata", total, avg, min, max, sq);
CEPH_LAT_METRIC_SHOW("metadata", total, avg, min, max, sq);
seq_printf(s, "\n");
seq_printf(s, "item total avg_sz(bytes) min_sz(bytes) max_sz(bytes) total_sz(bytes)\n");
seq_printf(s, "----------------------------------------------------------------------------------------\n");
spin_lock(&m->read_metric_lock);
total = m->total_reads;
sum_sz = m->read_size_sum;
avg_sz = total > 0 ? DIV64_U64_ROUND_CLOSEST(sum_sz, total) : 0;
min_sz = m->read_size_min;
max_sz = m->read_size_max;
spin_unlock(&m->read_metric_lock);
CEPH_SZ_METRIC_SHOW("read", total, avg_sz, min_sz, max_sz, sum_sz);
spin_lock(&m->write_metric_lock);
total = m->total_writes;
sum_sz = m->write_size_sum;
avg_sz = total > 0 ? DIV64_U64_ROUND_CLOSEST(sum_sz, total) : 0;
min_sz = m->write_size_min;
max_sz = m->write_size_max;
spin_unlock(&m->write_metric_lock);
CEPH_SZ_METRIC_SHOW("write", total, avg_sz, min_sz, max_sz, sum_sz);
seq_printf(s, "\n");
seq_printf(s, "item total miss hit\n");