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Message-Id: <148182704695.5314.15122595032764379808.stgit@hbathini.in.ibm.com>
Date: Fri, 16 Dec 2016 00:07:26 +0530
From: Hari Bathini <hbathini@...ux.vnet.ibm.com>
To: ast@...com, peterz@...radead.org,
lkml <linux-kernel@...r.kernel.org>, acme@...nel.org,
alexander.shishkin@...ux.intel.com, mingo@...hat.com
Cc: daniel@...earbox.net, rostedt@...dmis.org,
Ananth N Mavinakayanahalli <ananth@...ux.vnet.ibm.com>,
ebiederm@...ssion.com, sargun@...gun.me,
Aravinda Prasad <aravinda@...ux.vnet.ibm.com>,
brendan.d.gregg@...il.com
Subject: [PATCH v4 3/3] perf tool: add cgroup identifier entry in perf report
This patch introduces a cgroup identifier entry field in perf report to
identify or distinguish data of different cgroups. It uses the device
number and inode number of cgroup namespace, included in perf data with
the new PERF_RECORD_NAMESPACES event, as cgroup identifier. With the
assumption that each container is created with it's own cgroup namespace,
this allows assessment/analysis of multiple containers at once.
Shown below is the output of perf report, sorted based on cgroup id, on
a system that was running three containers at the time of perf record
and clearly showing one of the containers' considerable use of kernel
memory in comparison with others:
$ perf report -s cgroup_id,sample --stdio
#
# Total Lost Samples: 0
#
# Samples: 2K of event 'kmem:kmalloc'
# Event count (approx.): 2176
#
# Overhead cgroup id (dev/inode) Samples
# ........ ..................... ............
#
89.20% 3/0xf00000cf 1941
3.31% 3/0xeffffffb 72
3.08% 3/0xf00000d0 67
2.25% 3/0xf00000d1 49
2.16% 0/0x0 47
Signed-off-by: Hari Bathini <hbathini@...ux.vnet.ibm.com>
---
tools/perf/util/hist.c | 7 +++++++
tools/perf/util/hist.h | 1 +
tools/perf/util/sort.c | 41 +++++++++++++++++++++++++++++++++++++++++
tools/perf/util/sort.h | 7 +++++++
4 files changed, 56 insertions(+)
diff --git a/tools/perf/util/hist.c b/tools/perf/util/hist.c
index 6770a96..9996e0c 100644
--- a/tools/perf/util/hist.c
+++ b/tools/perf/util/hist.c
@@ -2,6 +2,7 @@
#include "build-id.h"
#include "hist.h"
#include "session.h"
+#include "namespaces.h"
#include "sort.h"
#include "evlist.h"
#include "evsel.h"
@@ -168,6 +169,7 @@ void hists__calc_col_len(struct hists *hists, struct hist_entry *h)
hists__set_unres_dso_col_len(hists, HISTC_MEM_DADDR_DSO);
}
+ hists__new_col_len(hists, HISTC_CGROUP_ID, 20);
hists__new_col_len(hists, HISTC_CPU, 3);
hists__new_col_len(hists, HISTC_SOCKET, 6);
hists__new_col_len(hists, HISTC_MEM_LOCKED, 6);
@@ -573,9 +575,14 @@ __hists__add_entry(struct hists *hists,
bool sample_self,
struct hist_entry_ops *ops)
{
+ struct namespaces *ns = thread__namespaces(al->thread);
struct hist_entry entry = {
.thread = al->thread,
.comm = thread__comm(al->thread),
+ .cgroup_id = {
+ .dev = ns ? ns->link_info[CGROUP_NS_INDEX].dev : 0,
+ .ino = ns ? ns->link_info[CGROUP_NS_INDEX].ino : 0,
+ },
.ms = {
.map = al->map,
.sym = al->sym,
diff --git a/tools/perf/util/hist.h b/tools/perf/util/hist.h
index d4b6514..d7696fd 100644
--- a/tools/perf/util/hist.h
+++ b/tools/perf/util/hist.h
@@ -30,6 +30,7 @@ enum hist_column {
HISTC_DSO,
HISTC_THREAD,
HISTC_COMM,
+ HISTC_CGROUP_ID,
HISTC_PARENT,
HISTC_CPU,
HISTC_SOCKET,
diff --git a/tools/perf/util/sort.c b/tools/perf/util/sort.c
index df622f4..9f5f404 100644
--- a/tools/perf/util/sort.c
+++ b/tools/perf/util/sort.c
@@ -536,6 +536,46 @@ struct sort_entry sort_cpu = {
.se_width_idx = HISTC_CPU,
};
+/* --sort cgroup_id */
+
+static int64_t _sort__cgroup_dev_cmp(u64 left_dev, u64 right_dev)
+{
+ return (int64_t)(right_dev - left_dev);
+}
+
+static int64_t _sort__cgroup_inode_cmp(u64 left_ino, u64 right_ino)
+{
+ return (int64_t)(right_ino - left_ino);
+}
+
+static int64_t
+sort__cgroup_id_cmp(struct hist_entry *left, struct hist_entry *right)
+{
+ int64_t ret;
+
+ ret = _sort__cgroup_dev_cmp(right->cgroup_id.dev, left->cgroup_id.dev);
+ if (ret != 0)
+ return ret;
+
+ return _sort__cgroup_inode_cmp(right->cgroup_id.ino,
+ left->cgroup_id.ino);
+}
+
+static int hist_entry__cgroup_id_snprintf(struct hist_entry *he,
+ char *bf, size_t size,
+ unsigned int width __maybe_unused)
+{
+ return repsep_snprintf(bf, size, "%lu/0x%lx", he->cgroup_id.dev,
+ he->cgroup_id.ino);
+}
+
+struct sort_entry sort_cgroup_id = {
+ .se_header = "cgroup id (dev/inode)",
+ .se_cmp = sort__cgroup_id_cmp,
+ .se_snprintf = hist_entry__cgroup_id_snprintf,
+ .se_width_idx = HISTC_CGROUP_ID,
+};
+
/* --sort socket */
static int64_t
@@ -1418,6 +1458,7 @@ static struct sort_dimension common_sort_dimensions[] = {
DIM(SORT_GLOBAL_WEIGHT, "weight", sort_global_weight),
DIM(SORT_TRANSACTION, "transaction", sort_transaction),
DIM(SORT_TRACE, "trace", sort_trace),
+ DIM(SORT_CGROUP_ID, "cgroup_id", sort_cgroup_id),
};
#undef DIM
diff --git a/tools/perf/util/sort.h b/tools/perf/util/sort.h
index 7aff317..68a5abb 100644
--- a/tools/perf/util/sort.h
+++ b/tools/perf/util/sort.h
@@ -54,6 +54,11 @@ struct he_stat {
u32 nr_events;
};
+struct namespace_id {
+ u64 dev;
+ u64 ino;
+};
+
struct hist_entry_diff {
bool computed;
union {
@@ -91,6 +96,7 @@ struct hist_entry {
struct map_symbol ms;
struct thread *thread;
struct comm *comm;
+ struct namespace_id cgroup_id;
u64 ip;
u64 transaction;
s32 socket;
@@ -211,6 +217,7 @@ enum sort_type {
SORT_GLOBAL_WEIGHT,
SORT_TRANSACTION,
SORT_TRACE,
+ SORT_CGROUP_ID,
/* branch stack specific sort keys */
__SORT_BRANCH_STACK,
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