From: Savinay Dharmappa <savinay.dharmappa@intel.com>
To: cristian.dumitrescu@intel.com, jasvinder.singh@intel.com, dev@dpdk.org
Cc: savinay.dharmappa@intel.com
Subject: [dpdk-dev] [PATCH v5 3/9] sched : add dynamic config of subport bandwidth
Date: Wed, 30 Sep 2020 20:24:28 +0100 [thread overview]
Message-ID: <20200930192434.47793-4-savinay.dharmappa@intel.com> (raw)
In-Reply-To: <20200930192434.47793-1-savinay.dharmappa@intel.com>
This patch adds support for dynamic config of subport bandwidth.
Signed-off-by: Savinay Dharmappa <savinay.dharmappa@intel.com>
Signed-off-by: Jasvinder Singh <jasvinder.singh@intel.com>
---
lib/librte_sched/rte_sched.c | 219 +++++++++++++++++++++++++++++++++++
lib/librte_sched/rte_sched.h | 23 ++++
2 files changed, 242 insertions(+)
diff --git a/lib/librte_sched/rte_sched.c b/lib/librte_sched/rte_sched.c
index 895b40d72..54940c451 100644
--- a/lib/librte_sched/rte_sched.c
+++ b/lib/librte_sched/rte_sched.c
@@ -174,6 +174,8 @@ struct rte_sched_subport {
/* Statistics */
struct rte_sched_subport_stats stats __rte_cache_aligned;
+ /* subport profile */
+ uint32_t profile;
/* Subport pipes */
uint32_t n_pipes_per_subport_enabled;
uint32_t n_pipe_profiles;
@@ -1155,6 +1157,49 @@ rte_sched_free_memory(struct rte_sched_port *port, uint32_t n_subports)
rte_free(port);
}
+static int
+rte_sched_subport_profile_config(struct rte_sched_port *port,
+ uint32_t subport_id,
+ uint32_t subport_profile_id)
+{
+ int i;
+ struct rte_sched_subport_profile *params;
+ struct rte_sched_subport *s;
+
+ /* Subport profile exceeds the max limit */
+ if (subport_profile_id >= port->n_max_subport_profiles) {
+ RTE_LOG(ERR, SCHED, "%s: "
+ "Number of subport profile exceeds the max limit\n",
+ __func__);
+ return -EINVAL;
+ }
+
+ params = port->subport_profiles + subport_profile_id;
+
+ s = port->subports[subport_id];
+
+ s->tb_credits = params->tb_size / 2;
+
+ s->tc_time = port->time + params->tc_period;
+
+ for (i = 0; i < RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE; i++)
+ if (s->qsize[i])
+ s->tc_credits[i] =
+ params->tc_credits_per_period[i];
+ else
+ params->tc_credits_per_period[i] = 0;
+
+#ifdef RTE_SCHED_SUBPORT_TC_OV
+ s->tc_ov_wm_max = rte_sched_time_ms_to_bytes(params->tc_period,
+ s->pipe_tc_be_rate_max);
+#endif
+ s->profile = subport_profile_id;
+
+ rte_sched_port_log_subport_profile(port, subport_profile_id);
+
+ return 0;
+}
+
int
rte_sched_subport_config(struct rte_sched_port *port,
uint32_t subport_id,
@@ -1344,6 +1389,180 @@ rte_sched_subport_config(struct rte_sched_port *port,
return 0;
}
+int
+rte_dynamic_sched_subport_config(struct rte_sched_port *port,
+ uint32_t subport_id,
+ struct rte_sched_subport_params *params,
+ uint32_t subport_profile_id)
+{
+ struct rte_sched_subport *s = NULL;
+ uint32_t n_subports = subport_id;
+ uint32_t n_subport_pipe_queues, i;
+ uint32_t size0, size1, bmp_mem_size;
+ int status;
+
+ /* Check user parameters */
+ if (port == NULL) {
+ RTE_LOG(ERR, SCHED,
+ "%s: Incorrect value for parameter port\n", __func__);
+ return 0;
+ }
+
+ if (subport_id >= port->n_subports_per_port) {
+ RTE_LOG(ERR, SCHED,
+ "%s: Incorrect value for subport id\n", __func__);
+
+ rte_sched_free_memory(port, n_subports);
+ return -EINVAL;
+ }
+
+
+ if (port->subports[subport_id] == NULL) {
+
+ status = rte_sched_subport_check_params(params,
+ port->n_pipes_per_subport,
+ port->rate);
+
+ if (status != 0) {
+ RTE_LOG(NOTICE, SCHED,
+ "%s: Port scheduler params check failed (%d)\n",
+ __func__, status);
+
+ rte_sched_free_memory(port, n_subports);
+ return -EINVAL;
+ }
+
+ /* Determine the amount of memory to allocate */
+ size0 = sizeof(struct rte_sched_subport);
+ size1 = rte_sched_subport_get_array_base(params,
+ e_RTE_SCHED_SUBPORT_ARRAY_TOTAL);
+
+ /* Allocate memory to store the data structures */
+ s = rte_zmalloc_socket("subport_params", size0 + size1,
+ RTE_CACHE_LINE_SIZE, port->socket);
+ if (s == NULL) {
+ RTE_LOG(ERR, SCHED,
+ "%s: Memory allocation fails\n", __func__);
+
+ rte_sched_free_memory(port, n_subports);
+ return -ENOMEM;
+ }
+
+ n_subports++;
+
+ /* Port */
+ port->subports[subport_id] = s;
+
+ s->tb_time = port->time;
+
+ subport_profile_id = 0;
+
+ /* compile time checks */
+ RTE_BUILD_BUG_ON(RTE_SCHED_PORT_N_GRINDERS == 0);
+ RTE_BUILD_BUG_ON(RTE_SCHED_PORT_N_GRINDERS &
+ (RTE_SCHED_PORT_N_GRINDERS - 1));
+
+ /* User parameters */
+ s->n_pipes_per_subport_enabled =
+ params->n_pipes_per_subport_enabled;
+ memcpy(s->qsize, params->qsize, sizeof(params->qsize));
+ s->n_pipe_profiles = params->n_pipe_profiles;
+ s->n_max_pipe_profiles = params->n_max_pipe_profiles;
+
+#ifdef RTE_SCHED_RED
+ for (i = 0; i < RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE; i++) {
+ uint32_t j;
+
+ for (j = 0; j < RTE_COLORS; j++) {
+ /* if min/max are both zero, then RED is disabled */
+ if ((params->red_params[i][j].min_th |
+ params->red_params[i][j].max_th) == 0) {
+ continue;
+ }
+
+ if (rte_red_config_init(&s->red_config[i][j],
+ params->red_params[i][j].wq_log2,
+ params->red_params[i][j].min_th,
+ params->red_params[i][j].max_th,
+ params->red_params[i][j].maxp_inv) != 0) {
+ rte_sched_free_memory(port, n_subports);
+
+ RTE_LOG(NOTICE, SCHED,
+ "%s: RED configuration init fails\n",
+ __func__);
+ return -EINVAL;
+ }
+ }
+ }
+#endif
+
+ /* Scheduling loop detection */
+ s->pipe_loop = RTE_SCHED_PIPE_INVALID;
+ s->pipe_exhaustion = 0;
+
+ /* Grinders */
+ s->busy_grinders = 0;
+
+ /* Queue base calculation */
+ rte_sched_subport_config_qsize(s);
+
+ /* Large data structures */
+ s->pipe = (struct rte_sched_pipe *)
+ (s->memory + rte_sched_subport_get_array_base(params,
+ e_RTE_SCHED_SUBPORT_ARRAY_PIPE));
+ s->queue = (struct rte_sched_queue *)
+ (s->memory + rte_sched_subport_get_array_base(params,
+ e_RTE_SCHED_SUBPORT_ARRAY_QUEUE));
+ s->queue_extra = (struct rte_sched_queue_extra *)
+ (s->memory + rte_sched_subport_get_array_base(params,
+ e_RTE_SCHED_SUBPORT_ARRAY_QUEUE_EXTRA));
+ s->pipe_profiles = (struct rte_sched_pipe_profile *)
+ (s->memory + rte_sched_subport_get_array_base(params,
+ e_RTE_SCHED_SUBPORT_ARRAY_PIPE_PROFILES));
+ s->bmp_array = s->memory +
+ rte_sched_subport_get_array_base(params,
+ e_RTE_SCHED_SUBPORT_ARRAY_BMP_ARRAY);
+ s->queue_array = (struct rte_mbuf **)
+ (s->memory + rte_sched_subport_get_array_base(params,
+ e_RTE_SCHED_SUBPORT_ARRAY_QUEUE_ARRAY));
+
+ /* Pipe profile table */
+ rte_sched_subport_config_pipe_profile_table(s, params,
+ port->rate);
+
+ /* Bitmap */
+ n_subport_pipe_queues = rte_sched_subport_pipe_queues(s);
+ bmp_mem_size = rte_bitmap_get_memory_footprint(
+ n_subport_pipe_queues);
+ s->bmp = rte_bitmap_init(n_subport_pipe_queues, s->bmp_array,
+ bmp_mem_size);
+ if (s->bmp == NULL) {
+ RTE_LOG(ERR, SCHED,
+ "%s: Subport bitmap init error\n", __func__);
+
+ rte_sched_free_memory(port, n_subports);
+ return -EINVAL;
+ }
+
+ for (i = 0; i < RTE_SCHED_PORT_N_GRINDERS; i++)
+ s->grinder_base_bmp_pos[i] = RTE_SCHED_PIPE_INVALID;
+
+#ifdef RTE_SCHED_SUBPORT_TC_OV
+ /* TC oversubscription */
+ s->tc_ov_wm_min = port->mtu;
+ s->tc_ov_wm = s->tc_ov_wm_max;
+ s->tc_ov_period_id = 0;
+ s->tc_ov = 0;
+ s->tc_ov_n = 0;
+ s->tc_ov_rate = 0;
+#endif
+ }
+
+ rte_sched_subport_profile_config(port, subport_id, subport_profile_id);
+
+ return 0;
+}
+
int
rte_sched_pipe_config(struct rte_sched_port *port,
uint32_t subport_id,
diff --git a/lib/librte_sched/rte_sched.h b/lib/librte_sched/rte_sched.h
index 3d823692c..3ecb0e9c3 100644
--- a/lib/librte_sched/rte_sched.h
+++ b/lib/librte_sched/rte_sched.h
@@ -376,6 +376,29 @@ rte_sched_subport_config(struct rte_sched_port *port,
uint32_t subport_id,
struct rte_sched_subport_params *params);
+/**
+ * Hierarchical scheduler subport configuration.
+ * Note that this function is also used at runtime
+ * to configure subport bandwidth profile.
+ * @param port
+ * Handle to port scheduler instance
+ * @param subport_id
+ * Subport ID
+ * @param params
+ * Subport configuration parameters.
+ * This parameter should be set to NULL, to
+ * configure the subport bandwidth profile
+ * at runtime.
+ * @param subport_profile_id
+ * ID of profile configured for subport
+ * @return
+ * 0 upon success, error code otherwise
+ */
+int
+rte_dynamic_sched_subport_config(struct rte_sched_port *port,
+ uint32_t subport_id,
+ struct rte_sched_subport_params *params,
+ uint32_t subport_profile_id);
/**
* Hierarchical scheduler pipe configuration
*
--
2.17.1
next prev parent reply other threads:[~2020-09-30 19:26 UTC|newest]
Thread overview: 107+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-15 18:27 [dpdk-dev] [RFC PATCH 0/2] Enable dyynamic configuration of subport bandwidth profile Savinay Dharmappa
2020-07-15 18:27 ` [dpdk-dev] [RFC PATCH 1/2] sched: add dynamic config " Savinay Dharmappa
2020-07-16 8:14 ` Singh, Jasvinder
2020-07-20 11:20 ` Dumitrescu, Cristian
2020-07-20 11:21 ` Dumitrescu, Cristian
2020-09-02 8:56 ` [dpdk-dev] [PATCH v1 1/4] " Savinay Dharmappa
2020-09-02 8:56 ` [dpdk-dev] [PATCH v1 2/4] " Savinay Dharmappa
2020-09-02 8:56 ` [dpdk-dev] [PATCH v1 3/4] " Savinay Dharmappa
2020-09-02 8:56 ` [dpdk-dev] [PATCH v1 4/4] " Savinay Dharmappa
2020-09-10 18:48 ` [dpdk-dev] [PATCH v2 00/10] Enable dynamic config of subport bandwidth Savinay Dharmappa
2020-09-10 18:48 ` [dpdk-dev] [PATCH v2 01/10] sched: add support profile data structure Savinay Dharmappa
2020-09-10 18:48 ` [dpdk-dev] [PATCH v2 02/10] sched: add subport profile table Savinay Dharmappa
2020-09-10 18:48 ` [dpdk-dev] [PATCH v2 03/10] sched: add subport profile add and config api Savinay Dharmappa
2020-09-14 14:05 ` Singh, Jasvinder
2020-09-10 18:48 ` [dpdk-dev] [PATCH v2 04/10] sched: update the grinder credit update function Savinay Dharmappa
2020-09-10 18:48 ` [dpdk-dev] [PATCH v2 05/10] sched: update the pipe config api implementation Savinay Dharmappa
2020-09-14 14:26 ` Singh, Jasvinder
2020-09-10 18:48 ` [dpdk-dev] [PATCH v2 06/10] example/qos_sched: add dynamic config of subport Savinay Dharmappa
2020-09-10 18:48 ` [dpdk-dev] [PATCH v2 07/10] example/ip_pipeline: " Savinay Dharmappa
2020-09-10 18:48 ` [dpdk-dev] [PATCH v2 08/10] drivers/softnic: " Savinay Dharmappa
2020-09-10 18:48 ` [dpdk-dev] [PATCH v2 09/10] app/test_sched: " Savinay Dharmappa
2020-09-10 18:48 ` [dpdk-dev] [PATCH v2 10/10] sched: remove the redundant code Savinay Dharmappa
2020-09-16 16:43 ` [dpdk-dev] [PATCH v3 0/9] Enable dynamic config of subport bandwidth Savinay Dharmappa
2020-09-16 16:43 ` [dpdk-dev] [PATCH v3 1/9] sched: add support profile data structure Savinay Dharmappa
2020-09-16 16:43 ` [dpdk-dev] [PATCH v3 2/9] sched: add subport profile table Savinay Dharmappa
2020-09-16 16:43 ` [dpdk-dev] [PATCH v3 3/9] sched: add subport profile add and config api Savinay Dharmappa
2020-09-16 16:43 ` [dpdk-dev] [PATCH v3 4/9] sched: update grinder credit and pipe config function Savinay Dharmappa
2020-09-16 16:43 ` [dpdk-dev] [PATCH v3 5/9] example/qos_sched: add dynamic config of subport Savinay Dharmappa
2020-09-16 16:43 ` [dpdk-dev] [PATCH v3 6/9] example/ip_pipeline: " Savinay Dharmappa
2020-09-16 16:43 ` [dpdk-dev] [PATCH v3 7/9] drivers/softnic: " Savinay Dharmappa
2020-09-16 16:43 ` [dpdk-dev] [PATCH v3 8/9] app/test_sched: " Savinay Dharmappa
2020-09-16 16:43 ` [dpdk-dev] [PATCH v3 9/9] sched: remove the redundant code Savinay Dharmappa
2020-09-17 8:42 ` [dpdk-dev] [PATCH v4 0/9] Enable dynamic config of subport bandwidth Savinay Dharmappa
2020-09-17 8:42 ` [dpdk-dev] [PATCH v4 1/9] sched: add support profile data structure Savinay Dharmappa
2020-09-17 8:42 ` [dpdk-dev] [PATCH v4 2/9] sched: add subport profile table Savinay Dharmappa
2020-09-17 8:42 ` [dpdk-dev] [PATCH v4 3/9] sched: add subport profile add and config api Savinay Dharmappa
2020-09-29 21:19 ` Dumitrescu, Cristian
2020-09-17 8:42 ` [dpdk-dev] [PATCH v4 4/9] sched: update grinder credit and pipe config function Savinay Dharmappa
2020-09-17 8:42 ` [dpdk-dev] [PATCH v4 5/9] example/qos_sched: add dynamic config of subport Savinay Dharmappa
2020-09-17 8:42 ` [dpdk-dev] [PATCH v4 6/9] example/ip_pipeline: " Savinay Dharmappa
2020-09-29 21:23 ` Dumitrescu, Cristian
2020-09-17 8:42 ` [dpdk-dev] [PATCH v4 7/9] drivers/softnic: " Savinay Dharmappa
2020-09-17 8:42 ` [dpdk-dev] [PATCH v4 8/9] app/test_sched: " Savinay Dharmappa
2020-09-17 8:42 ` [dpdk-dev] [PATCH v4 9/9] sched: remove the redundant code Savinay Dharmappa
2020-09-30 19:24 ` [dpdk-dev] [PATCH v5 0/9] Enable dynamic config of subport bandwidth Savinay Dharmappa
2020-09-30 19:24 ` [dpdk-dev] [PATCH v5 1/9] sched: add support profile table Savinay Dharmappa
2020-09-30 19:24 ` [dpdk-dev] [PATCH v5 2/9] sched: add subport profile add api Savinay Dharmappa
2020-09-30 19:24 ` Savinay Dharmappa [this message]
2020-09-30 19:24 ` [dpdk-dev] [PATCH v5 4/9] sched: update grinder credit and pipe config function Savinay Dharmappa
2020-09-30 19:24 ` [dpdk-dev] [PATCH v5 5/9] example/qos_sched: add dynamic config of subport Savinay Dharmappa
2020-09-30 19:24 ` [dpdk-dev] [PATCH v5 6/9] example/ip_pipeline: " Savinay Dharmappa
2020-09-30 19:24 ` [dpdk-dev] [PATCH v5 7/9] drivers/softnic: " Savinay Dharmappa
2020-09-30 19:24 ` [dpdk-dev] [PATCH v5 8/9] app/test_sched: " Savinay Dharmappa
2020-09-30 19:24 ` [dpdk-dev] [PATCH v5 9/9] sched : remove redundant code Savinay Dharmappa
2020-10-06 15:27 ` [dpdk-dev] [PATCH v6 0/8] Enable dynamic config of subport bandwidth Savinay Dharmappa
2020-10-06 15:27 ` [dpdk-dev] [PATCH v6 1/8] sched: add support profile table Savinay Dharmappa
2020-10-06 15:27 ` [dpdk-dev] [PATCH v6 2/8] sched: introduce subport profile add function Savinay Dharmappa
2020-10-06 15:27 ` [dpdk-dev] [PATCH v6 3/8] sched: update subport rate dynamically Savinay Dharmappa
2020-10-06 15:27 ` [dpdk-dev] [PATCH v6 4/8] example/qos_sched: " Savinay Dharmappa
2020-10-06 15:27 ` [dpdk-dev] [PATCH v6 5/8] example/ip_pipeline: " Savinay Dharmappa
2020-10-06 15:27 ` [dpdk-dev] [PATCH v6 6/8] drivers/softnic: " Savinay Dharmappa
2020-10-06 15:27 ` [dpdk-dev] [PATCH v6 7/8] app/test_sched: " Savinay Dharmappa
2020-10-06 15:27 ` [dpdk-dev] [PATCH v6 8/8] sched: remove redundant code Savinay Dharmappa
2020-10-06 15:52 ` [dpdk-dev] [PATCH v6 0/8] Enable dynamic config of subport bandwidth Dumitrescu, Cristian
2020-10-06 18:02 ` [dpdk-dev] [PATCH v7 " Savinay Dharmappa
2020-10-06 18:02 ` [dpdk-dev] [PATCH v7 1/8] sched: add support profile table Savinay Dharmappa
2020-10-06 18:02 ` [dpdk-dev] [PATCH v7 2/8] sched: introduce subport profile add function Savinay Dharmappa
2020-10-06 18:02 ` [dpdk-dev] [PATCH v7 3/8] sched: update subport rate dynamically Savinay Dharmappa
2020-10-06 18:02 ` [dpdk-dev] [PATCH v7 4/8] example/qos_sched: " Savinay Dharmappa
2020-10-06 18:02 ` [dpdk-dev] [PATCH v7 5/8] example/ip_pipeline: " Savinay Dharmappa
2020-10-06 18:02 ` [dpdk-dev] [PATCH v7 6/8] drivers/softnic: " Savinay Dharmappa
2020-10-06 18:02 ` [dpdk-dev] [PATCH v7 7/8] app/test_sched: " Savinay Dharmappa
2020-10-06 18:02 ` [dpdk-dev] [PATCH v7 8/8] sched: remove redundant code Savinay Dharmappa
2020-10-06 19:05 ` [dpdk-dev] [PATCH v7 0/8] Enable dynamic config of subport bandwidth Dumitrescu, Cristian
2020-10-07 14:09 ` [dpdk-dev] [PATCH v8 " Savinay Dharmappa
2020-10-07 14:09 ` [dpdk-dev] [PATCH v8 1/8] sched: add support profile table Savinay Dharmappa
2020-10-07 14:09 ` [dpdk-dev] [PATCH v8 2/8] sched: introduce subport profile add function Savinay Dharmappa
2020-10-07 14:09 ` [dpdk-dev] [PATCH v8 3/8] sched: update subport rate dynamically Savinay Dharmappa
2020-10-07 14:09 ` [dpdk-dev] [PATCH v8 4/8] example/qos_sched: " Savinay Dharmappa
2020-10-07 14:09 ` [dpdk-dev] [PATCH v8 5/8] example/ip_pipeline: " Savinay Dharmappa
2020-10-07 14:09 ` [dpdk-dev] [PATCH v8 6/8] drivers/softnic: " Savinay Dharmappa
2020-10-07 14:09 ` [dpdk-dev] [PATCH v8 7/8] app/test_sched: " Savinay Dharmappa
2020-10-07 14:09 ` [dpdk-dev] [PATCH v8 8/8] sched: remove redundant code Savinay Dharmappa
2020-10-09 8:28 ` Thomas Monjalon
2020-10-09 12:39 ` [dpdk-dev] [PATCH v9 0/8] Enable dynamic config of subport bandwidth Savinay Dharmappa
2020-10-09 12:39 ` [dpdk-dev] [PATCH v9 1/8] sched: add support profile table Savinay Dharmappa
2020-10-09 12:39 ` [dpdk-dev] [PATCH v9 2/8] sched: introduce subport profile add function Savinay Dharmappa
2020-10-09 12:39 ` [dpdk-dev] [PATCH v9 3/8] sched: update subport rate dynamically Savinay Dharmappa
2020-10-09 12:39 ` [dpdk-dev] [PATCH v9 4/8] example/qos_sched: " Savinay Dharmappa
2020-10-09 12:39 ` [dpdk-dev] [PATCH v9 5/8] example/ip_pipeline: " Savinay Dharmappa
2020-10-09 12:39 ` [dpdk-dev] [PATCH v9 6/8] drivers/softnic: " Savinay Dharmappa
2020-10-09 12:39 ` [dpdk-dev] [PATCH v9 7/8] app/test_sched: " Savinay Dharmappa
2020-10-09 12:39 ` [dpdk-dev] [PATCH v9 8/8] sched: remove redundant code Savinay Dharmappa
2020-10-11 20:11 ` [dpdk-dev] [PATCH v9 0/8] Enable dynamic config of subport bandwidth Thomas Monjalon
2020-10-12 5:24 ` Dharmappa, Savinay
2020-10-12 23:08 ` Dharmappa, Savinay
2020-10-13 13:56 ` Dharmappa, Savinay
2020-10-13 14:06 ` Thomas Monjalon
2020-10-15 0:17 ` Thomas Monjalon
2020-07-15 18:27 ` [dpdk-dev] [RFC PATCH 2/2] example/qos_sched: subport bandwidth profile config Savinay Dharmappa
2020-07-16 8:14 ` Singh, Jasvinder
2020-09-02 9:07 ` [dpdk-dev] [PATCH v1 1/4] example/qos_sched: subport bandwidth dynmaic conf Savinay Dharmappa
2020-09-02 9:07 ` [dpdk-dev] [PATCH v1 2/4] example/ip_pipeline: " Savinay Dharmappa
2020-09-02 9:07 ` [dpdk-dev] [PATCH v1 3/4] drivers/softnic: subport bandwidth profile config Savinay Dharmappa
2020-09-02 9:07 ` [dpdk-dev] [PATCH v1 4/4] app/test_sched: " Savinay Dharmappa
2020-09-02 10:46 ` [dpdk-dev] [PATCH v1 1/4] example/qos_sched: subport bandwidth dynmaic conf Dharmappa, Savinay
2020-07-16 8:14 ` [dpdk-dev] [RFC PATCH 0/2] Enable dyynamic configuration of subport bandwidth profile Singh, Jasvinder
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