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Message-ID: <e07e7cff-66c1-16fa-0b6a-b1679e8fc904@huawei.com>
Date: Thu, 23 Mar 2023 21:03:30 +0800
From: Yicong Yang <yangyicong@...wei.com>
To: <acme@...nel.org>, <mark.rutland@....com>, <peterz@...radead.org>,
<mingo@...hat.com>, <james.clark@....com>,
<alexander.shishkin@...ux.intel.com>,
<linux-perf-users@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC: <yangyicong@...ilicon.com>, <Jonathan.Cameron@...wei.com>,
<21cnbao@...il.com>, <tim.c.chen@...el.com>,
<prime.zeng@...ilicon.com>, <shenyang39@...wei.com>,
<linuxarm@...wei.com>
Subject: Re: [PATCH] perf stat: Support per-cluster aggregation
Hi perf maintainers,
A gentle ping. Appreciate for any comment!
Thanks
On 2023/3/13 16:59, Yicong Yang wrote:
> From: Yicong Yang <yangyicong@...ilicon.com>
>
> Some platforms have 'cluster' topology and CPUs in the cluster will
> share resources like L3 Cache Tag (for HiSilicon Kunpeng SoC) or L2
> cache (for Intel Jacobsville). Currently parsing and building cluster
> topology have been supported since [1].
>
> perf stat has already supported aggregation for other topologies like
> die or socket, etc. It'll be useful to aggregate per-cluster to find
> problems like L3T bandwidth contention or imbalance.
>
> This patch adds support for "--per-cluster" option for per-cluster
> aggregation. Also update the docs and related test. The output will
> be like:
>
> [root@...alhost tmp]# perf stat -a -e LLC-load --per-cluster -- sleep 5
>
> Performance counter stats for 'system wide':
>
> S56-D0-CLS158 4 1,321,521,570 LLC-load
> S56-D0-CLS594 4 794,211,453 LLC-load
> S56-D0-CLS1030 4 41,623 LLC-load
> S56-D0-CLS1466 4 41,646 LLC-load
> S56-D0-CLS1902 4 16,863 LLC-load
> S56-D0-CLS2338 4 15,721 LLC-load
> S56-D0-CLS2774 4 22,671 LLC-load
> [...]
>
> [1] commit c5e22feffdd7 ("topology: Represent clusters of CPUs within a die")
>
> Signed-off-by: Yicong Yang <yangyicong@...ilicon.com>
> ---
> tools/perf/Documentation/perf-stat.txt | 10 ++++
> tools/perf/builtin-stat.c | 52 +++++++++++++++++--
> .../tests/shell/lib/perf_json_output_lint.py | 4 +-
> tools/perf/tests/shell/stat+csv_output.sh | 14 +++++
> tools/perf/tests/shell/stat+json_output.sh | 13 +++++
> tools/perf/util/cpumap.c | 28 +++++++++-
> tools/perf/util/cpumap.h | 19 +++++--
> tools/perf/util/env.h | 1 +
> tools/perf/util/stat-display.c | 13 +++++
> tools/perf/util/stat.h | 1 +
> 10 files changed, 146 insertions(+), 9 deletions(-)
>
> diff --git a/tools/perf/Documentation/perf-stat.txt b/tools/perf/Documentation/perf-stat.txt
> index 18abdc1dce05..688433c3756c 100644
> --- a/tools/perf/Documentation/perf-stat.txt
> +++ b/tools/perf/Documentation/perf-stat.txt
> @@ -308,6 +308,13 @@ use --per-die in addition to -a. (system-wide). The output includes the
> die number and the number of online processors on that die. This is
> useful to gauge the amount of aggregation.
>
> +--per-cluster::
> +Aggregate counts per processor cluster for system-wide mode measurement. This
> +is a useful mode to detect imbalance between clusters. To enable this mode,
> +use --per-cluster in addition to -a. (system-wide). The output includes the
> +cluster number and the number of online processors on that cluster. This is
> +useful to gauge the amount of aggregation.
> +
> --per-core::
> Aggregate counts per physical processor for system-wide mode measurements. This
> is a useful mode to detect imbalance between physical cores. To enable this mode,
> @@ -379,6 +386,9 @@ Aggregate counts per processor socket for system-wide mode measurements.
> --per-die::
> Aggregate counts per processor die for system-wide mode measurements.
>
> +--per-cluster::
> +Aggregate counts perf processor cluster for system-wide mode measurements.
> +
> --per-core::
> Aggregate counts per physical processor for system-wide mode measurements.
>
> diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
> index fa7c40956d0f..e5630cb28985 100644
> --- a/tools/perf/builtin-stat.c
> +++ b/tools/perf/builtin-stat.c
> @@ -1237,6 +1237,8 @@ static struct option stat_options[] = {
> "aggregate counts per processor socket", AGGR_SOCKET),
> OPT_SET_UINT(0, "per-die", &stat_config.aggr_mode,
> "aggregate counts per processor die", AGGR_DIE),
> + OPT_SET_UINT(0, "per-cluster", &stat_config.aggr_mode,
> + "aggregate counts per processor cluster", AGGR_CLUSTER),
> OPT_SET_UINT(0, "per-core", &stat_config.aggr_mode,
> "aggregate counts per physical processor core", AGGR_CORE),
> OPT_SET_UINT(0, "per-thread", &stat_config.aggr_mode,
> @@ -1298,6 +1300,7 @@ static struct option stat_options[] = {
>
> static const char *const aggr_mode__string[] = {
> [AGGR_CORE] = "core",
> + [AGGR_CLUSTER] = "cluster",
> [AGGR_DIE] = "die",
> [AGGR_GLOBAL] = "global",
> [AGGR_NODE] = "node",
> @@ -1319,6 +1322,12 @@ static struct aggr_cpu_id perf_stat__get_die(struct perf_stat_config *config __m
> return aggr_cpu_id__die(cpu, /*data=*/NULL);
> }
>
> +static struct aggr_cpu_id perf_stat__get_cluster(struct perf_stat_config *config __maybe_unused,
> + struct perf_cpu cpu)
> +{
> + return aggr_cpu_id__cluster(cpu, /*data=*/NULL);
> +}
> +
> static struct aggr_cpu_id perf_stat__get_core(struct perf_stat_config *config __maybe_unused,
> struct perf_cpu cpu)
> {
> @@ -1371,6 +1380,12 @@ static struct aggr_cpu_id perf_stat__get_die_cached(struct perf_stat_config *con
> return perf_stat__get_aggr(config, perf_stat__get_die, cpu);
> }
>
> +static struct aggr_cpu_id perf_stat__get_cluster_cached(struct perf_stat_config *config,
> + struct perf_cpu cpu)
> +{
> + return perf_stat__get_aggr(config, perf_stat__get_cluster, cpu);
> +}
> +
> static struct aggr_cpu_id perf_stat__get_core_cached(struct perf_stat_config *config,
> struct perf_cpu cpu)
> {
> @@ -1402,6 +1417,8 @@ static aggr_cpu_id_get_t aggr_mode__get_aggr(enum aggr_mode aggr_mode)
> return aggr_cpu_id__socket;
> case AGGR_DIE:
> return aggr_cpu_id__die;
> + case AGGR_CLUSTER:
> + return aggr_cpu_id__cluster;
> case AGGR_CORE:
> return aggr_cpu_id__core;
> case AGGR_NODE:
> @@ -1425,6 +1442,8 @@ static aggr_get_id_t aggr_mode__get_id(enum aggr_mode aggr_mode)
> return perf_stat__get_socket_cached;
> case AGGR_DIE:
> return perf_stat__get_die_cached;
> + case AGGR_CLUSTER:
> + return perf_stat__get_cluster_cached;
> case AGGR_CORE:
> return perf_stat__get_core_cached;
> case AGGR_NODE:
> @@ -1537,6 +1556,21 @@ static struct aggr_cpu_id perf_env__get_die_aggr_by_cpu(struct perf_cpu cpu, voi
> return id;
> }
>
> +static struct aggr_cpu_id perf_env__get_cluster_aggr_by_cpu(struct perf_cpu cpu,
> + void *data)
> +{
> + struct perf_env *env = data;
> + struct aggr_cpu_id id = aggr_cpu_id__empty();
> +
> + if (cpu.cpu != -1) {
> + id.socket = env->cpu[cpu.cpu].socket_id;
> + id.die = env->cpu[cpu.cpu].die_id;
> + id.cluster = env->cpu[cpu.cpu].cluster_id;
> + }
> +
> + return id;
> +}
> +
> static struct aggr_cpu_id perf_env__get_core_aggr_by_cpu(struct perf_cpu cpu, void *data)
> {
> struct perf_env *env = data;
> @@ -1544,12 +1578,12 @@ static struct aggr_cpu_id perf_env__get_core_aggr_by_cpu(struct perf_cpu cpu, vo
>
> if (cpu.cpu != -1) {
> /*
> - * core_id is relative to socket and die,
> - * we need a global id. So we set
> - * socket, die id and core id
> + * core_id is relative to socket, die and cluster, we need a
> + * global id. So we set socket, die id, cluster id and core id.
> */
> id.socket = env->cpu[cpu.cpu].socket_id;
> id.die = env->cpu[cpu.cpu].die_id;
> + id.cluster = env->cpu[cpu.cpu].cluster_id;
> id.core = env->cpu[cpu.cpu].core_id;
> }
>
> @@ -1605,6 +1639,12 @@ static struct aggr_cpu_id perf_stat__get_die_file(struct perf_stat_config *confi
> return perf_env__get_die_aggr_by_cpu(cpu, &perf_stat.session->header.env);
> }
>
> +static struct aggr_cpu_id perf_stat__get_cluster_file(struct perf_stat_config *config __maybe_unused,
> + struct perf_cpu cpu)
> +{
> + return perf_env__get_cluster_aggr_by_cpu(cpu, &perf_stat.session->header.env);
> +}
> +
> static struct aggr_cpu_id perf_stat__get_core_file(struct perf_stat_config *config __maybe_unused,
> struct perf_cpu cpu)
> {
> @@ -1636,6 +1676,8 @@ static aggr_cpu_id_get_t aggr_mode__get_aggr_file(enum aggr_mode aggr_mode)
> return perf_env__get_socket_aggr_by_cpu;
> case AGGR_DIE:
> return perf_env__get_die_aggr_by_cpu;
> + case AGGR_CLUSTER:
> + return perf_env__get_cluster_aggr_by_cpu;
> case AGGR_CORE:
> return perf_env__get_core_aggr_by_cpu;
> case AGGR_NODE:
> @@ -1659,6 +1701,8 @@ static aggr_get_id_t aggr_mode__get_id_file(enum aggr_mode aggr_mode)
> return perf_stat__get_socket_file;
> case AGGR_DIE:
> return perf_stat__get_die_file;
> + case AGGR_CLUSTER:
> + return perf_stat__get_cluster_file;
> case AGGR_CORE:
> return perf_stat__get_core_file;
> case AGGR_NODE:
> @@ -2219,6 +2263,8 @@ static int __cmd_report(int argc, const char **argv)
> "aggregate counts per processor socket", AGGR_SOCKET),
> OPT_SET_UINT(0, "per-die", &perf_stat.aggr_mode,
> "aggregate counts per processor die", AGGR_DIE),
> + OPT_SET_UINT(0, "per-cluster", &perf_stat.aggr_mode,
> + "aggregate counts perf processor cluster", AGGR_CLUSTER),
> OPT_SET_UINT(0, "per-core", &perf_stat.aggr_mode,
> "aggregate counts per physical processor core", AGGR_CORE),
> OPT_SET_UINT(0, "per-node", &perf_stat.aggr_mode,
> diff --git a/tools/perf/tests/shell/lib/perf_json_output_lint.py b/tools/perf/tests/shell/lib/perf_json_output_lint.py
> index 97598d14e532..1869ff9b92c1 100644
> --- a/tools/perf/tests/shell/lib/perf_json_output_lint.py
> +++ b/tools/perf/tests/shell/lib/perf_json_output_lint.py
> @@ -14,6 +14,7 @@ ap.add_argument('--system-wide', action='store_true')
> ap.add_argument('--event', action='store_true')
> ap.add_argument('--per-core', action='store_true')
> ap.add_argument('--per-thread', action='store_true')
> +ap.add_argument('--per-cluster', action='store_true')
> ap.add_argument('--per-die', action='store_true')
> ap.add_argument('--per-node', action='store_true')
> ap.add_argument('--per-socket', action='store_true')
> @@ -46,6 +47,7 @@ def check_json_output(expected_items):
> 'counter-value': lambda x: is_counter_value(x),
> 'cgroup': lambda x: True,
> 'cpu': lambda x: isint(x),
> + 'cluster': lambda x: True,
> 'die': lambda x: True,
> 'event': lambda x: True,
> 'event-runtime': lambda x: isfloat(x),
> @@ -82,7 +84,7 @@ try:
> expected_items = 7
> elif args.interval or args.per_thread or args.system_wide_no_aggr:
> expected_items = 8
> - elif args.per_core or args.per_socket or args.per_node or args.per_die:
> + elif args.per_core or args.per_socket or args.per_node or args.per_die or args.per_cluster:
> expected_items = 9
> else:
> # If no option is specified, don't check the number of items.
> diff --git a/tools/perf/tests/shell/stat+csv_output.sh b/tools/perf/tests/shell/stat+csv_output.sh
> index 324fc9e6edd7..7311bc835280 100755
> --- a/tools/perf/tests/shell/stat+csv_output.sh
> +++ b/tools/perf/tests/shell/stat+csv_output.sh
> @@ -26,6 +26,7 @@ function commachecker()
> ;; "--per-socket") exp=8
> ;; "--per-node") exp=8
> ;; "--per-die") exp=8
> + ;; "--per-cluster") exp=8
> esac
>
> while read line
> @@ -123,6 +124,18 @@ check_per_thread()
> echo "[Success]"
> }
>
> +check_per_cluster()
> +{
> + echo -n "Checking CSV output: per cluster "
> + if ParanoidAndNotRoot 0
> + then
> + echo "[Skip] paranoid and not root"
> + return
> + fi
> + perf stat -x$csv_sep --per-cluster -a true 2>&1 | commachecker --per-cluster
> + echo "[Success]"
> +}
> +
> check_per_die()
> {
> echo -n "Checking CSV output: per die "
> @@ -197,6 +210,7 @@ if [ $skip_test -ne 1 ]
> then
> check_system_wide_no_aggr
> check_per_core
> + check_per_cluster
> check_per_die
> check_per_socket
> else
> diff --git a/tools/perf/tests/shell/stat+json_output.sh b/tools/perf/tests/shell/stat+json_output.sh
> index 2c4212c641ed..c74bfd32abcb 100755
> --- a/tools/perf/tests/shell/stat+json_output.sh
> +++ b/tools/perf/tests/shell/stat+json_output.sh
> @@ -100,6 +100,18 @@ check_per_thread()
> echo "[Success]"
> }
>
> +check_per_cluster()
> +{
> + echo -n "Checking json output: per cluster "
> + if ParanoidAndNotRoot 0
> + then
> + echo "[Skip] paranoia and not root"
> + return
> + fi
> + perf stat -j --per-cluster -a true 2>&1 | $PYTHON $pythonchecker --per-cluster
> + echo "[Success]"
> +}
> +
> check_per_die()
> {
> echo -n "Checking json output: per die "
> @@ -174,6 +186,7 @@ if [ $skip_test -ne 1 ]
> then
> check_system_wide_no_aggr
> check_per_core
> + check_per_cluster
> check_per_die
> check_per_socket
> else
> diff --git a/tools/perf/util/cpumap.c b/tools/perf/util/cpumap.c
> index 5e564974fba4..636b3bc0cc04 100644
> --- a/tools/perf/util/cpumap.c
> +++ b/tools/perf/util/cpumap.c
> @@ -227,6 +227,8 @@ static int aggr_cpu_id__cmp(const void *a_pointer, const void *b_pointer)
> return a->socket - b->socket;
> else if (a->die != b->die)
> return a->die - b->die;
> + else if (a->cluster != b->cluster)
> + return a->cluster - b->cluster;
> else if (a->core != b->core)
> return a->core - b->core;
> else
> @@ -310,6 +312,25 @@ struct aggr_cpu_id aggr_cpu_id__die(struct perf_cpu cpu, void *data)
> return id;
> }
>
> +int cpu__get_cluster_id(struct perf_cpu cpu)
> +{
> + int value, ret = cpu__get_topology_int(cpu.cpu, "cluster_id", &value);
> + return ret ?: value;
> +}
> +
> +struct aggr_cpu_id aggr_cpu_id__cluster(struct perf_cpu cpu, void *data)
> +{
> + int cluster = cpu__get_cluster_id(cpu);
> + struct aggr_cpu_id id;
> +
> + id = aggr_cpu_id__die(cpu, data);
> + if (aggr_cpu_id__is_empty(&id))
> + return id;
> +
> + id.cluster = cluster;
> + return id;
> +}
> +
> int cpu__get_core_id(struct perf_cpu cpu)
> {
> int value, ret = cpu__get_topology_int(cpu.cpu, "core_id", &value);
> @@ -321,8 +342,8 @@ struct aggr_cpu_id aggr_cpu_id__core(struct perf_cpu cpu, void *data)
> struct aggr_cpu_id id;
> int core = cpu__get_core_id(cpu);
>
> - /* aggr_cpu_id__die returns a struct with socket and die set. */
> - id = aggr_cpu_id__die(cpu, data);
> + /* aggr_cpu_id__die returns a struct with socket die, and cluster set. */
> + id = aggr_cpu_id__cluster(cpu, data);
> if (aggr_cpu_id__is_empty(&id))
> return id;
>
> @@ -684,6 +705,7 @@ bool aggr_cpu_id__equal(const struct aggr_cpu_id *a, const struct aggr_cpu_id *b
> a->node == b->node &&
> a->socket == b->socket &&
> a->die == b->die &&
> + a->cluster == b->cluster &&
> a->core == b->core &&
> a->cpu.cpu == b->cpu.cpu;
> }
> @@ -694,6 +716,7 @@ bool aggr_cpu_id__is_empty(const struct aggr_cpu_id *a)
> a->node == -1 &&
> a->socket == -1 &&
> a->die == -1 &&
> + a->cluster == -1 &&
> a->core == -1 &&
> a->cpu.cpu == -1;
> }
> @@ -705,6 +728,7 @@ struct aggr_cpu_id aggr_cpu_id__empty(void)
> .node = -1,
> .socket = -1,
> .die = -1,
> + .cluster = -1,
> .core = -1,
> .cpu = (struct perf_cpu){ .cpu = -1 },
> };
> diff --git a/tools/perf/util/cpumap.h b/tools/perf/util/cpumap.h
> index c2f5824a3a22..e3b6b8c1b0b4 100644
> --- a/tools/perf/util/cpumap.h
> +++ b/tools/perf/util/cpumap.h
> @@ -20,6 +20,8 @@ struct aggr_cpu_id {
> int socket;
> /** The die id as read from /sys/devices/system/cpu/cpuX/topology/die_id. */
> int die;
> + /** The cluster id as read from /sys/devices/system/cpu/cpuX/topology/cluster_id */
> + int cluster;
> /** The core id as read from /sys/devices/system/cpu/cpuX/topology/core_id. */
> int core;
> /** CPU aggregation, note there is one CPU for each SMT thread. */
> @@ -76,6 +78,11 @@ int cpu__get_socket_id(struct perf_cpu cpu);
> * /sys/devices/system/cpu/cpuX/topology/die_id for the given CPU.
> */
> int cpu__get_die_id(struct perf_cpu cpu);
> +/**
> + * cpu__get_cluster_id - Returns the cluster id as read from
> + * /sys/devices/system/cpu/cpuX/topology/cluster_id for the given CPU
> + */
> +int cpu__get_cluster_id(struct perf_cpu cpu);
> /**
> * cpu__get_core_id - Returns the core id as read from
> * /sys/devices/system/cpu/cpuX/topology/core_id for the given CPU.
> @@ -117,9 +124,15 @@ struct aggr_cpu_id aggr_cpu_id__socket(struct perf_cpu cpu, void *data);
> */
> struct aggr_cpu_id aggr_cpu_id__die(struct perf_cpu cpu, void *data);
> /**
> - * aggr_cpu_id__core - Create an aggr_cpu_id with the core, die and socket
> - * populated with the core, die and socket for cpu. The function signature is
> - * compatible with aggr_cpu_id_get_t.
> + * aggr_cpu_id__cluster - Create an aggr_cpu_id with cluster, die and socket
> + * populated with the cluster, die and socket for cpu. The function signature
> + * is compatible with aggr_cpu_id_get_t.
> + */
> +struct aggr_cpu_id aggr_cpu_id__cluster(struct perf_cpu cpu, void *data);
> +/**
> + * aggr_cpu_id__core - Create an aggr_cpu_id with the core, cluster, die and
> + * socket populated with the core, die and socket for cpu. The function
> + * signature is compatible with aggr_cpu_id_get_t.
> */
> struct aggr_cpu_id aggr_cpu_id__core(struct perf_cpu cpu, void *data);
> /**
> diff --git a/tools/perf/util/env.h b/tools/perf/util/env.h
> index 4566c51f2fd9..e288649627d5 100644
> --- a/tools/perf/util/env.h
> +++ b/tools/perf/util/env.h
> @@ -12,6 +12,7 @@ struct perf_cpu_map;
> struct cpu_topology_map {
> int socket_id;
> int die_id;
> + int cluster_id;
> int core_id;
> };
>
> diff --git a/tools/perf/util/stat-display.c b/tools/perf/util/stat-display.c
> index 1b5cb20efd23..a6aca21ab040 100644
> --- a/tools/perf/util/stat-display.c
> +++ b/tools/perf/util/stat-display.c
> @@ -193,6 +193,9 @@ static void print_aggr_id_std(struct perf_stat_config *config,
> case AGGR_CORE:
> snprintf(buf, sizeof(buf), "S%d-D%d-C%d", id.socket, id.die, id.core);
> break;
> + case AGGR_CLUSTER:
> + snprintf(buf, sizeof(buf), "S%d-D%d-CLS%d", id.socket, id.die, id.cluster);
> + break;
> case AGGR_DIE:
> snprintf(buf, sizeof(buf), "S%d-D%d", id.socket, id.die);
> break;
> @@ -239,6 +242,10 @@ static void print_aggr_id_csv(struct perf_stat_config *config,
> fprintf(output, "S%d-D%d-C%d%s%d%s",
> id.socket, id.die, id.core, sep, nr, sep);
> break;
> + case AGGR_CLUSTER:
> + fprintf(config->output, "S%d-D%d-CLS%d%s%d%s",
> + id.socket, id.die, id.cluster, sep, nr, sep);
> + break;
> case AGGR_DIE:
> fprintf(output, "S%d-D%d%s%d%s",
> id.socket, id.die, sep, nr, sep);
> @@ -284,6 +291,10 @@ static void print_aggr_id_json(struct perf_stat_config *config,
> fprintf(output, "\"core\" : \"S%d-D%d-C%d\", \"aggregate-number\" : %d, ",
> id.socket, id.die, id.core, nr);
> break;
> + case AGGR_CLUSTER:
> + fprintf(output, "\"cluster\" : \"S%d-D%d-CLS%d\", \"aggregate-number\" : %d, ",
> + id.socket, id.die, id.cluster, nr);
> + break;
> case AGGR_DIE:
> fprintf(output, "\"die\" : \"S%d-D%d\", \"aggregate-number\" : %d, ",
> id.socket, id.die, nr);
> @@ -1126,6 +1137,7 @@ static void print_header_interval_std(struct perf_stat_config *config,
> case AGGR_NODE:
> case AGGR_SOCKET:
> case AGGR_DIE:
> + case AGGR_CLUSTER:
> case AGGR_CORE:
> fprintf(output, "#%*s %-*s cpus",
> INTERVAL_LEN - 1, "time",
> @@ -1422,6 +1434,7 @@ void evlist__print_counters(struct evlist *evlist, struct perf_stat_config *conf
>
> switch (config->aggr_mode) {
> case AGGR_CORE:
> + case AGGR_CLUSTER:
> case AGGR_DIE:
> case AGGR_SOCKET:
> case AGGR_NODE:
> diff --git a/tools/perf/util/stat.h b/tools/perf/util/stat.h
> index bf1794ebc916..9efbfbc25bc7 100644
> --- a/tools/perf/util/stat.h
> +++ b/tools/perf/util/stat.h
> @@ -74,6 +74,7 @@ enum aggr_mode {
> AGGR_GLOBAL,
> AGGR_SOCKET,
> AGGR_DIE,
> + AGGR_CLUSTER,
> AGGR_CORE,
> AGGR_THREAD,
> AGGR_UNSET,
>
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