ceph-devel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Venky Shankar <vshankar@redhat.com>
To: jlayton@redhat.com, pdonnell@redhat.com, xiubli@redhat.com
Cc: ceph-devel@vger.kernel.org, Venky Shankar <vshankar@redhat.com>
Subject: [PATCH v1 3/4] ceph: include average/stddev r/w/m latency in mds metrics
Date: Mon, 13 Sep 2021 18:43:10 +0530	[thread overview]
Message-ID: <20210913131311.1347903-4-vshankar@redhat.com> (raw)
In-Reply-To: <20210913131311.1347903-1-vshankar@redhat.com>

The use of `jiffies_to_timespec64()` seems incorrect too, switch
that to `ktime_to_timespec64()`.

Signed-off-by: Venky Shankar <vshankar@redhat.com>
---
 fs/ceph/metric.c | 36 +++++++++++++++++++-----------------
 fs/ceph/metric.h | 44 +++++++++++++++++++++++++++++++-------------
 2 files changed, 50 insertions(+), 30 deletions(-)

diff --git a/fs/ceph/metric.c b/fs/ceph/metric.c
index e00b1c2ce25b..cb332ae2411f 100644
--- a/fs/ceph/metric.c
+++ b/fs/ceph/metric.c
@@ -8,6 +8,13 @@
 #include "metric.h"
 #include "mds_client.h"
 
+static void to_ceph_timespec(struct ceph_timespec *ts, ktime_t val)
+{
+	struct timespec64 t = ktime_to_timespec64(val);
+	ts->tv_sec = cpu_to_le32(t.tv_sec);
+	ts->tv_nsec = cpu_to_le32(t.tv_nsec);
+}
+
 static bool ceph_mdsc_send_metrics(struct ceph_mds_client *mdsc,
 				   struct ceph_mds_session *s)
 {
@@ -20,8 +27,6 @@ static bool ceph_mdsc_send_metrics(struct ceph_mds_client *mdsc,
 	struct ceph_client_metric *m = &mdsc->metric;
 	u64 nr_caps = atomic64_read(&m->total_caps);
 	struct ceph_msg *msg;
-	struct timespec64 ts;
-	s64 sum;
 	s32 items = 0;
 	s32 len;
 
@@ -51,37 +56,34 @@ static bool ceph_mdsc_send_metrics(struct ceph_mds_client *mdsc,
 	/* encode the read latency metric */
 	read = (struct ceph_metric_read_latency *)(cap + 1);
 	read->type = cpu_to_le32(CLIENT_METRIC_TYPE_READ_LATENCY);
-	read->ver = 1;
+	read->ver = 2;
 	read->compat = 1;
 	read->data_len = cpu_to_le32(sizeof(*read) - 10);
-	sum = m->read_latency_sum;
-	jiffies_to_timespec64(sum, &ts);
-	read->lat.tv_sec = cpu_to_le32(ts.tv_sec);
-	read->lat.tv_nsec = cpu_to_le32(ts.tv_nsec);
+	to_ceph_timespec(&read->lat, m->read_latency_sum);
+	to_ceph_timespec(&read->avg, m->avg_read_latency);
+	to_ceph_timespec(&read->stdev, m->read_latency_stdev);
 	items++;
 
 	/* encode the write latency metric */
 	write = (struct ceph_metric_write_latency *)(read + 1);
 	write->type = cpu_to_le32(CLIENT_METRIC_TYPE_WRITE_LATENCY);
-	write->ver = 1;
+	write->ver = 2;
 	write->compat = 1;
 	write->data_len = cpu_to_le32(sizeof(*write) - 10);
-	sum = m->write_latency_sum;
-	jiffies_to_timespec64(sum, &ts);
-	write->lat.tv_sec = cpu_to_le32(ts.tv_sec);
-	write->lat.tv_nsec = cpu_to_le32(ts.tv_nsec);
+	to_ceph_timespec(&write->lat, m->write_latency_sum);
+	to_ceph_timespec(&write->avg, m->avg_write_latency);
+	to_ceph_timespec(&write->stdev, m->write_latency_stdev);
 	items++;
 
 	/* encode the metadata latency metric */
 	meta = (struct ceph_metric_metadata_latency *)(write + 1);
 	meta->type = cpu_to_le32(CLIENT_METRIC_TYPE_METADATA_LATENCY);
-	meta->ver = 1;
+	meta->ver = 2;
 	meta->compat = 1;
 	meta->data_len = cpu_to_le32(sizeof(*meta) - 10);
-	sum = m->metadata_latency_sum;
-	jiffies_to_timespec64(sum, &ts);
-	meta->lat.tv_sec = cpu_to_le32(ts.tv_sec);
-	meta->lat.tv_nsec = cpu_to_le32(ts.tv_nsec);
+	to_ceph_timespec(&meta->lat, m->metadata_latency_sum);
+	to_ceph_timespec(&meta->avg, m->avg_metadata_latency);
+	to_ceph_timespec(&meta->stdev, m->metadata_latency_stdev);
 	items++;
 
 	/* encode the dentry lease metric */
diff --git a/fs/ceph/metric.h b/fs/ceph/metric.h
index 136689fa0aec..b68927378e59 100644
--- a/fs/ceph/metric.h
+++ b/fs/ceph/metric.h
@@ -14,22 +14,34 @@ enum ceph_metric_type {
 	CLIENT_METRIC_TYPE_WRITE_LATENCY,
 	CLIENT_METRIC_TYPE_METADATA_LATENCY,
 	CLIENT_METRIC_TYPE_DENTRY_LEASE,
-
-	CLIENT_METRIC_TYPE_MAX = CLIENT_METRIC_TYPE_DENTRY_LEASE,
+	CLIENT_METRIC_TYPE_AVG_READ_LATENCY,
+	CLIENT_METRIC_TYPE_STDEV_READ_LATENCY,
+	CLIENT_METRIC_TYPE_AVG_WRITE_LATENCY,
+	CLIENT_METRIC_TYPE_STDEV_WRITE_LATENCY,
+	CLIENT_METRIC_TYPE_AVG_METADATA_LATENCY,
+	CLIENT_METRIC_TYPE_STDEV_METADATA_LATENCY,
+
+	CLIENT_METRIC_TYPE_MAX = CLIENT_METRIC_TYPE_STDEV_METADATA_LATENCY,
 };
 
 /*
  * This will always have the highest metric bit value
  * as the last element of the array.
  */
-#define CEPHFS_METRIC_SPEC_CLIENT_SUPPORTED {	\
-	CLIENT_METRIC_TYPE_CAP_INFO,		\
-	CLIENT_METRIC_TYPE_READ_LATENCY,	\
-	CLIENT_METRIC_TYPE_WRITE_LATENCY,	\
-	CLIENT_METRIC_TYPE_METADATA_LATENCY,	\
-	CLIENT_METRIC_TYPE_DENTRY_LEASE,	\
-						\
-	CLIENT_METRIC_TYPE_MAX,			\
+#define CEPHFS_METRIC_SPEC_CLIENT_SUPPORTED {	   \
+	CLIENT_METRIC_TYPE_CAP_INFO,		   \
+	CLIENT_METRIC_TYPE_READ_LATENCY,	   \
+	CLIENT_METRIC_TYPE_WRITE_LATENCY,	   \
+	CLIENT_METRIC_TYPE_METADATA_LATENCY,	   \
+	CLIENT_METRIC_TYPE_DENTRY_LEASE,	   \
+	CLIENT_METRIC_TYPE_AVG_READ_LATENCY,	   \
+	CLIENT_METRIC_TYPE_STDEV_READ_LATENCY,	   \
+	CLIENT_METRIC_TYPE_AVG_WRITE_LATENCY,	   \
+	CLIENT_METRIC_TYPE_STDEV_WRITE_LATENCY,	   \
+	CLIENT_METRIC_TYPE_AVG_METADATA_LATENCY,   \
+	CLIENT_METRIC_TYPE_STDEV_METADATA_LATENCY, \
+						   \
+	CLIENT_METRIC_TYPE_MAX,			   \
 }
 
 /* metric caps header */
@@ -52,8 +64,10 @@ struct ceph_metric_read_latency {
 	__u8  ver;
 	__u8  compat;
 
-	__le32 data_len; /* length of sizeof(lat) */
+	__le32 data_len; /* length of sizeof(lat+avg+stdev) */
 	struct ceph_timespec lat;
+	struct ceph_timespec avg;
+	struct ceph_timespec stdev;
 } __packed;
 
 /* metric write latency header */
@@ -63,8 +77,10 @@ struct ceph_metric_write_latency {
 	__u8  ver;
 	__u8  compat;
 
-	__le32 data_len; /* length of sizeof(lat) */
+	__le32 data_len; /* length of sizeof(lat_avg_stdev) */
 	struct ceph_timespec lat;
+	struct ceph_timespec avg;
+	struct ceph_timespec stdev;
 } __packed;
 
 /* metric metadata latency header */
@@ -74,8 +90,10 @@ struct ceph_metric_metadata_latency {
 	__u8  ver;
 	__u8  compat;
 
-	__le32 data_len; /* length of sizeof(lat) */
+	__le32 data_len; /* length of sizeof(lat+avg+stdev) */
 	struct ceph_timespec lat;
+	struct ceph_timespec avg;
+	struct ceph_timespec stdev;
 } __packed;
 
 /* metric dentry lease header */
-- 
2.27.0


  parent reply	other threads:[~2021-09-13 13:13 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-13 13:13 [PATCH v1 0/4] ceph: forward average read/write/metadata latency Venky Shankar
2021-09-13 13:13 ` [PATCH v1 1/4] ceph: use "struct ceph_timespec" for r/w/m latencies Venky Shankar
2021-09-13 13:13 ` [PATCH v1 2/4] ceph: track average/stdev r/w/m latency Venky Shankar
2021-09-13 13:13 ` Venky Shankar [this message]
2021-09-13 13:13 ` [PATCH v1 4/4] ceph: use tracked average r/w/m latencies to display metrics in debugfs Venky Shankar
2021-09-13 15:13 ` [PATCH v1 0/4] ceph: forward average read/write/metadata latency Jeff Layton
2021-09-13 15:21   ` Jeff Layton
2021-09-13 15:41     ` Venky Shankar
2021-09-14 12:53   ` Xiubo Li

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20210913131311.1347903-4-vshankar@redhat.com \
    --to=vshankar@redhat.com \
    --cc=ceph-devel@vger.kernel.org \
    --cc=jlayton@redhat.com \
    --cc=pdonnell@redhat.com \
    --cc=xiubli@redhat.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).