[ofa-general] Re: [PATCH RFC] opensm: mcast mgr improvements

Hal Rosenstock hrosenstock at xsigo.com
Sun Dec 30 08:38:30 PST 2007


On Sat, 2007-12-29 at 18:27 +0000, Sasha Khapyorsky wrote:
> This improves handling of mcast join/leave requests storming. Now mcast
> routing will be recalculated for all mcast groups where changes occurred
> and not one by one. For this it queues mcast groups instead of mcast
> rerouting requests, this also makes state_mgr idle queue obsolete.

Looks like a nice improvement.

What testing has been done with this change ? Can you comment on any
results ?

For which branches is this change being proposed ?

-- Hal

> Signed-off-by: Sasha Khapyorsky <sashak at voltaire.com>
> ---
> 
> Hi Yevgeny,
> 
> For me it looks that it should solve the original problem (mcast group
> list is purged in osm_mcast_mgr_process()). Could you review and ideally
> test it? Thanks.
> 
> Sasha
> 
> ---
>  opensm/include/opensm/osm_mcast_mgr.h |   14 +--
>  opensm/include/opensm/osm_multicast.h |    2 +
>  opensm/include/opensm/osm_sm.h        |    2 +
>  opensm/include/opensm/osm_state_mgr.h |   95 -----------------
>  opensm/opensm/osm_mcast_mgr.c         |  187 +++++++++++++++------------------
>  opensm/opensm/osm_sm.c                |   70 ++++++-------
>  opensm/opensm/osm_state_mgr.c         |  138 +------------------------
>  7 files changed, 130 insertions(+), 378 deletions(-)
> 
> diff --git a/opensm/include/opensm/osm_mcast_mgr.h b/opensm/include/opensm/osm_mcast_mgr.h
> index 3e0b761..47b67ed 100644
> --- a/opensm/include/opensm/osm_mcast_mgr.h
> +++ b/opensm/include/opensm/osm_mcast_mgr.h
> @@ -100,7 +100,6 @@ typedef struct _osm_mcast_mgr {
>  	osm_req_t *p_req;
>  	osm_log_t *p_log;
>  	cl_plock_t *p_lock;
> -
>  } osm_mcast_mgr_t;
>  /*
>  * FIELDS
> @@ -253,25 +252,22 @@ osm_signal_t osm_mcast_mgr_process(IN osm_mcast_mgr_t * const p_mgr);
>  *	Multicast Manager, Node Info Response Controller
>  *********/
>  
> -/****f* OpenSM: Multicast Manager/osm_mcast_mgr_process_mgrp_cb
> +/****f* OpenSM: Multicast Manager/osm_mcast_mgr_process_mgroups
>  * NAME
> -*	osm_mcast_mgr_process_mgrp_cb
> +*	osm_mcast_mgr_process_mgroups
>  *
>  * DESCRIPTION
> -*	Callback entry point for the osm_mcast_mgr_process_mgrp function.
> +*	Process only requested mcast groups.
>  *
>  * SYNOPSIS
>  */
>  osm_signal_t
> -osm_mcast_mgr_process_mgrp_cb(IN void *const Context1, IN void *const Context2);
> +osm_mcast_mgr_process_mgroups(IN osm_mcast_mgr_t *p_mgr);
>  /*
>  * PARAMETERS
> -*	(Context1) p_mgr
> +*	p_mgr
>  *		[in] Pointer to an osm_mcast_mgr_t object.
>  *
> -*	(Context2) p_mgrp
> -*		[in] Pointer to the multicast group to process.
> -*
>  * RETURN VALUES
>  *	IB_SUCCESS
>  *
> diff --git a/opensm/include/opensm/osm_multicast.h b/opensm/include/opensm/osm_multicast.h
> index 729a2ea..f442a45 100644
> --- a/opensm/include/opensm/osm_multicast.h
> +++ b/opensm/include/opensm/osm_multicast.h
> @@ -50,6 +50,7 @@
>  
>  #include <iba/ib_types.h>
>  #include <complib/cl_qmap.h>
> +#include <complib/cl_qlist.h>
>  #include <complib/cl_spinlock.h>
>  #include <opensm/osm_base.h>
>  #include <opensm/osm_mtree.h>
> @@ -121,6 +122,7 @@ const char *osm_get_mcast_req_type_str(IN osm_mcast_req_type_t req_type);
>  * SYNOPSIS
>  */
>  typedef struct osm_mcast_mgr_ctxt {
> +	cl_list_item_t list_item;
>  	ib_net16_t mlid;
>  	osm_mcast_req_type_t req_type;
>  	ib_net64_t port_guid;
> diff --git a/opensm/include/opensm/osm_sm.h b/opensm/include/opensm/osm_sm.h
> index 4c6ce27..a676cd6 100644
> --- a/opensm/include/opensm/osm_sm.h
> +++ b/opensm/include/opensm/osm_sm.h
> @@ -140,6 +140,8 @@ typedef struct osm_sm {
>  	cl_dispatcher_t *p_disp;
>  	cl_plock_t *p_lock;
>  	atomic32_t sm_trans_id;
> +	cl_spinlock_t mgrp_lock;
> +	cl_qlist_t mgrp_list;
>  	osm_req_t req;
>  	osm_resp_t resp;
>  	osm_ni_rcv_t ni_rcv;
> diff --git a/opensm/include/opensm/osm_state_mgr.h b/opensm/include/opensm/osm_state_mgr.h
> index dada097..f51593a 100644
> --- a/opensm/include/opensm/osm_state_mgr.h
> +++ b/opensm/include/opensm/osm_state_mgr.h
> @@ -109,8 +109,6 @@ typedef struct _osm_state_mgr {
>  	osm_stats_t *p_stats;
>  	struct _osm_sm_state_mgr *p_sm_state_mgr;
>  	const osm_sm_mad_ctrl_t *p_mad_ctrl;
> -	cl_spinlock_t idle_lock;
> -	cl_qlist_t idle_time_list;
>  	cl_plock_t *p_lock;
>  	cl_event_t *p_subnet_up_event;
>  	osm_sm_state_t state;
> @@ -172,99 +170,6 @@ typedef struct _osm_state_mgr {
>  *	State Manager object
>  *********/
>  
> -/****s* OpenSM: State Manager/_osm_idle_item
> -* NAME
> -*	_osm_idle_item
> -*
> -* DESCRIPTION
> -*	Idle item.
> -*
> -* SYNOPSIS
> -*/
> -
> -typedef osm_signal_t(*osm_pfn_start_t) (IN void *context1, IN void *context2);
> -
> -typedef void
> - (*osm_pfn_done_t) (IN void *context1, IN void *context2);
> -
> -typedef struct _osm_idle_item {
> -	cl_list_item_t list_item;
> -	void *context1;
> -	void *context2;
> -	osm_pfn_start_t pfn_start;
> -	osm_pfn_done_t pfn_done;
> -} osm_idle_item_t;
> -
> -/*
> -* FIELDS
> -*	list_item
> -*		list item.
> -*
> -*	context1
> -*		Context pointer
> -*
> -*	context2
> -*		Context pointer
> -*
> -*	pfn_start
> -*		Pointer to the start function.
> -*
> -*	pfn_done
> -*		Pointer to the dine function.
> -* SEE ALSO
> -*	State Manager object
> -*********/
> -
> -/****f* OpenSM: State Manager/osm_state_mgr_process_idle
> -* NAME
> -*	osm_state_mgr_process_idle
> -*
> -* DESCRIPTION
> -*	Formulates the osm_idle_item and inserts it into the queue and
> -*	signals the state manager.
> -*
> -* SYNOPSIS
> -*/
> -
> -ib_api_status_t
> -osm_state_mgr_process_idle(IN osm_state_mgr_t * const p_mgr,
> -			   IN osm_pfn_start_t pfn_start,
> -			   IN osm_pfn_done_t pfn_done,
> -			   void *context1, void *context2);
> -
> -/*
> -* PARAMETERS
> -*	p_mgr
> -*		[in] Pointer to a State Manager object to construct.
> -*
> -*	pfn_start
> -*		[in] Pointer the start function which will be called at
> -*			idle time.
> -*
> -*	pfn_done
> -*		[in] pointer the done function which will be called
> -*			when outstanding smps is zero
> -*
> -*	context1
> -*		[in] Pointer to void
> -*
> -*	context2
> -*		[in] Pointer to void
> -*
> -* RETURN VALUE
> -*	IB_SUCCESS or IB_ERROR
> -*
> -* NOTES
> -*	Allows osm_state_mgr_destroy
> -*
> -*	Calling osm_state_mgr_construct is a prerequisite to calling any other
> -*	method except osm_state_mgr_init.
> -*
> -* SEE ALSO
> -*	State Manager object, osm_state_mgr_init,
> -*	osm_state_mgr_destroy
> -*********/
> -
>  /****f* OpenSM: State Manager/osm_state_mgr_construct
>  * NAME
>  *	osm_state_mgr_construct
> diff --git a/opensm/opensm/osm_mcast_mgr.c b/opensm/opensm/osm_mcast_mgr.c
> index 50b95fd..f51a45a 100644
> --- a/opensm/opensm/osm_mcast_mgr.c
> +++ b/opensm/opensm/osm_mcast_mgr.c
> @@ -815,7 +815,7 @@ static osm_mtree_node_t *__osm_mcast_mgr_branch(osm_mcast_mgr_t * const p_mgr,
>  	}
>  
>  	free(list_array);
> -      Exit:
> +Exit:
>  	OSM_LOG_EXIT(p_mgr->p_log);
>  	return (p_mtn);
>  }
> @@ -932,7 +932,7 @@ __osm_mcast_mgr_build_spanning_tree(osm_mcast_mgr_t * const p_mgr,
>  		"Configured MLID 0x%X for %u ports, max tree depth = %u\n",
>  		cl_ntoh16(osm_mgrp_get_mlid(p_mgrp)), count, max_depth);
>  
> -      Exit:
> +Exit:
>  	OSM_LOG_EXIT(p_mgr->p_log);
>  	return (status);
>  }
> @@ -1171,7 +1171,7 @@ osm_mcast_mgr_process_single(IN osm_mcast_mgr_t * const p_mgr,
>  		}
>  	}
>  
> -      Exit:
> +Exit:
>  	OSM_LOG_EXIT(p_mgr->p_log);
>  	return (status);
>  }
> @@ -1254,63 +1254,55 @@ osm_mcast_mgr_process_tree(IN osm_mcast_mgr_t * const p_mgr,
>  							   port_guid);
>  	}
>  
> -      Exit:
> +Exit:
>  	OSM_LOG_EXIT(p_mgr->p_log);
>  	return (status);
>  }
>  
>  /**********************************************************************
>   Process the entire group.
> -
>   NOTE : The lock should be held externally!
>   **********************************************************************/
> -static osm_signal_t
> -osm_mcast_mgr_process_mgrp(IN osm_mcast_mgr_t * const p_mgr,
> -			   IN osm_mgrp_t * const p_mgrp,
> -			   IN osm_mcast_req_type_t req_type,
> -			   IN ib_net64_t port_guid)
> +static ib_api_status_t
> +mcast_mgr_process_mgrp(IN osm_mcast_mgr_t * const p_mgr,
> +		       IN osm_mgrp_t * const p_mgrp,
> +		       IN osm_mcast_req_type_t req_type,
> +		       IN ib_net64_t port_guid)
>  {
> -	osm_signal_t signal = OSM_SIGNAL_DONE;
>  	ib_api_status_t status;
> -	osm_switch_t *p_sw;
> -	cl_qmap_t *p_sw_tbl;
> -	boolean_t pending_transactions = FALSE;
>  
>  	OSM_LOG_ENTER(p_mgr->p_log, osm_mcast_mgr_process_mgrp);
>  
> -	p_sw_tbl = &p_mgr->p_subn->sw_guid_tbl;
> -
>  	status = osm_mcast_mgr_process_tree(p_mgr, p_mgrp, req_type, port_guid);
>  	if (status != IB_SUCCESS) {
>  		osm_log(p_mgr->p_log, OSM_LOG_ERROR,
> -			"osm_mcast_mgr_process_mgrp: ERR 0A19: "
> +			"mcast_mgr_process_mgrp: ERR 0A19: "
>  			"Unable to create spanning tree (%s)\n",
>  			ib_get_err_str(status));
> -
>  		goto Exit;
>  	}
> +	p_mgrp->last_tree_id = p_mgrp->last_change_id;
>  
> -	/*
> -	   Walk the switches and download the tables for each.
> +	/* Remove MGRP only if osm_mcm_port_t count is 0 and
> +	 * Not a well known group
>  	 */
> -	p_sw = (osm_switch_t *) cl_qmap_head(p_sw_tbl);
> -	while (p_sw != (osm_switch_t *) cl_qmap_end(p_sw_tbl)) {
> -		signal = __osm_mcast_mgr_set_tbl(p_mgr, p_sw);
> -		if (signal == OSM_SIGNAL_DONE_PENDING)
> -			pending_transactions = TRUE;
> -
> -		p_sw = (osm_switch_t *) cl_qmap_next(&p_sw->map_item);
> +	if (cl_qmap_count(&p_mgrp->mcm_port_tbl) == 0 && !p_mgrp->well_known) {
> +		osm_log(p_mgr->p_log, OSM_LOG_DEBUG,
> +			"mcast_mgr_process_mgrp: "
> +			"Destroying mgrp with lid:0x%X\n",
> +			cl_ntoh16(p_mgrp->mlid));
> +		/* Send a Report to any InformInfo registered for
> +		   Trap 67 : MCGroup delete */
> +		osm_mgrp_send_delete_notice(p_mgr->p_subn, p_mgr->p_log,
> +					    p_mgrp);
> +		cl_qmap_remove_item(&p_mgr->p_subn->mgrp_mlid_tbl,
> +				    (cl_map_item_t *) p_mgrp);
> +		osm_mgrp_delete(p_mgrp);
>  	}
>  
> -	osm_dump_mcast_routes(p_mgr->p_subn->p_osm);
> -
> -      Exit:
> +Exit:
>  	OSM_LOG_EXIT(p_mgr->p_log);
> -
> -	if (pending_transactions == TRUE)
> -		return (OSM_SIGNAL_DONE_PENDING);
> -	else
> -		return (OSM_SIGNAL_DONE);
> +	return status;
>  }
>  
>  /**********************************************************************
> @@ -1321,14 +1313,13 @@ osm_signal_t osm_mcast_mgr_process(IN osm_mcast_mgr_t * const p_mgr)
>  	osm_switch_t *p_sw;
>  	cl_qmap_t *p_sw_tbl;
>  	cl_qmap_t *p_mcast_tbl;
> +	cl_qlist_t *p_list = &p_mgr->p_subn->p_osm->sm.mgrp_list;
>  	osm_mgrp_t *p_mgrp;
> -	ib_api_status_t status;
>  	boolean_t pending_transactions = FALSE;
>  
>  	OSM_LOG_ENTER(p_mgr->p_log, osm_mcast_mgr_process);
>  
>  	p_sw_tbl = &p_mgr->p_subn->sw_guid_tbl;
> -
>  	p_mcast_tbl = &p_mgr->p_subn->mgrp_mlid_tbl;
>  	/*
>  	   While holding the lock, iterate over all the established
> @@ -1343,16 +1334,8 @@ osm_signal_t osm_mcast_mgr_process(IN osm_mcast_mgr_t * const p_mgr)
>  		/* We reached here due to some change that caused a heavy sweep
>  		   of the subnet. Not due to a specific multicast request.
>  		   So the request type is subnet_change and the port guid is 0. */
> -		status = osm_mcast_mgr_process_tree(p_mgr, p_mgrp,
> -						    OSM_MCAST_REQ_TYPE_SUBNET_CHANGE,
> -						    0);
> -		if (status != IB_SUCCESS) {
> -			osm_log(p_mgr->p_log, OSM_LOG_ERROR,
> -				"osm_mcast_mgr_process: ERR 0A20: "
> -				"Unable to create spanning tree (%s)\n",
> -				ib_get_err_str(status));
> -		}
> -
> +		mcast_mgr_process_mgrp(p_mgr, p_mgrp,
> +				       OSM_MCAST_REQ_TYPE_SUBNET_CHANGE, 0);
>  		p_mgrp = (osm_mgrp_t *) cl_qmap_next(&p_mgrp->map_item);
>  	}
>  
> @@ -1364,10 +1347,14 @@ osm_signal_t osm_mcast_mgr_process(IN osm_mcast_mgr_t * const p_mgr)
>  		signal = __osm_mcast_mgr_set_tbl(p_mgr, p_sw);
>  		if (signal == OSM_SIGNAL_DONE_PENDING)
>  			pending_transactions = TRUE;
> -
>  		p_sw = (osm_switch_t *) cl_qmap_next(&p_sw->map_item);
>  	}
>  
> +	while (!cl_is_qlist_empty(p_list)) {
> +		cl_list_item_t *p = cl_qlist_remove_head(p_list);
> +		free(p);
> +	}
> +
>  	CL_PLOCK_RELEASE(p_mgr->p_lock);
>  
>  	OSM_LOG_EXIT(p_mgr->p_log);
> @@ -1395,79 +1382,79 @@ osm_mgrp_t *__get_mgrp_by_mlid(IN osm_mcast_mgr_t * const p_mgr,
>  
>  /**********************************************************************
>    This is the function that is invoked during idle time to handle the
> -  process request. Context1 is simply the osm_mcast_mgr_t*, Context2
> -  hold the mlid, port guid and action (join/leave/delete) required.
> +  process request for mcast groups where join/leave/delete was required.
>   **********************************************************************/
> -osm_signal_t
> -osm_mcast_mgr_process_mgrp_cb(IN void *const Context1, IN void *const Context2)
> +osm_signal_t osm_mcast_mgr_process_mgroups(osm_mcast_mgr_t * p_mgr)
>  {
> -	osm_mcast_mgr_t *p_mgr = (osm_mcast_mgr_t *) Context1;
> +	cl_qlist_t *p_list = &p_mgr->p_subn->p_osm->sm.mgrp_list;
> +	osm_switch_t *p_sw;
> +	cl_qmap_t *p_sw_tbl;
>  	osm_mgrp_t *p_mgrp;
>  	ib_net16_t mlid;
> -	osm_signal_t signal = OSM_SIGNAL_DONE;
> -	osm_mcast_mgr_ctxt_t *p_ctxt = (osm_mcast_mgr_ctxt_t *) Context2;
> -	osm_mcast_req_type_t req_type = p_ctxt->req_type;
> -	ib_net64_t port_guid = p_ctxt->port_guid;
> -
> -	OSM_LOG_ENTER(p_mgr->p_log, osm_mcast_mgr_process_mgrp_cb);
> -
> -	/* nice copy no warning on size diff */
> -	memcpy(&mlid, &p_ctxt->mlid, sizeof(mlid));
> +	osm_signal_t ret, signal = OSM_SIGNAL_DONE;
> +	osm_mcast_mgr_ctxt_t *ctx;
> +	osm_mcast_req_type_t req_type;
> +	ib_net64_t port_guid;
>  
> -	/* we can destroy the context now */
> -	free(p_ctxt);
> +	OSM_LOG_ENTER(p_mgr->p_log, osm_mcast_mgr_process_mgroups);
>  
>  	/* we need a lock to make sure the p_mgrp is not change other ways */
>  	CL_PLOCK_EXCL_ACQUIRE(p_mgr->p_lock);
> -	p_mgrp = __get_mgrp_by_mlid(p_mgr, mlid);
>  
> -	/* since we delayed the execution we prefer to pass the
> -	   mlid as the mgrp identifier and then find it or abort */
> +	if (cl_is_qlist_empty(p_list)) {
> +		CL_PLOCK_RELEASE(p_mgr->p_lock);
> +		return OSM_SIGNAL_NONE;
> +	}
> +
> +	while (!cl_is_qlist_empty(p_list)) {
> +		ctx = (osm_mcast_mgr_ctxt_t *) cl_qlist_remove_head(p_list);
> +		req_type = ctx->req_type;
> +		port_guid = ctx->port_guid;
> +
> +		/* nice copy no warning on size diff */
> +		memcpy(&mlid, &ctx->mlid, sizeof(mlid));
>  
> -	if (p_mgrp) {
> +		/* we can destroy the context now */
> +		free(ctx);
> +
> +		/* since we delayed the execution we prefer to pass the
> +		   mlid as the mgrp identifier and then find it or abort */
> +		p_mgrp = __get_mgrp_by_mlid(p_mgr, mlid);
> +		if (!p_mgrp)
> +			continue;
>  
> -		/* if there was no change from the last time we processed the group
> -		   we can skip doing anything
> +		/* if there was no change from the last time
> +		 * we processed the group we can skip doing anything
>  		 */
>  		if (p_mgrp->last_change_id == p_mgrp->last_tree_id) {
>  			osm_log(p_mgr->p_log, OSM_LOG_DEBUG,
> -				"osm_mcast_mgr_process_mgrp_cb: "
> +				"osm_mcast_mgr_process_mgroups: "
>  				"Skip processing mgrp with lid:0x%X change id:%u\n",
>  				cl_ntoh16(mlid), p_mgrp->last_change_id);
> -		} else {
> -			osm_log(p_mgr->p_log, OSM_LOG_DEBUG,
> -				"osm_mcast_mgr_process_mgrp_cb: "
> -				"Processing mgrp with lid:0x%X change id:%u\n",
> -				cl_ntoh16(mlid), p_mgrp->last_change_id);
> -
> -			signal =
> -			    osm_mcast_mgr_process_mgrp(p_mgr, p_mgrp, req_type,
> -						       port_guid);
> -			p_mgrp->last_tree_id = p_mgrp->last_change_id;
> +			continue;
>  		}
>  
> -		/* Remove MGRP only if osm_mcm_port_t count is 0 and
> -		 * Not a well known group
> -		 */
> -		if ((0x0 == cl_qmap_count(&p_mgrp->mcm_port_tbl)) &&
> -		    (p_mgrp->well_known == FALSE)) {
> -			osm_log(p_mgr->p_log, OSM_LOG_DEBUG,
> -				"osm_mcast_mgr_process_mgrp_cb: "
> -				"Destroying mgrp with lid:0x%X\n",
> -				cl_ntoh16(mlid));
> -
> -			/* Send a Report to any InformInfo registered for
> -			   Trap 67 : MCGroup delete */
> -			osm_mgrp_send_delete_notice(p_mgr->p_subn, p_mgr->p_log,
> -						    p_mgrp);
> -
> -			cl_qmap_remove_item(&p_mgr->p_subn->mgrp_mlid_tbl,
> -					    (cl_map_item_t *) p_mgrp);
> +		osm_log(p_mgr->p_log, OSM_LOG_DEBUG,
> +			"osm_mcast_mgr_process_mgroups: "
> +			"Processing mgrp with lid:0x%X change id:%u\n",
> +			cl_ntoh16(mlid), p_mgrp->last_change_id);
> +		mcast_mgr_process_mgrp(p_mgr, p_mgrp, req_type, port_guid);
> +	}
>  
> -			osm_mgrp_delete(p_mgrp);
> -		}
> +	/*
> +	   Walk the switches and download the tables for each.
> +	 */
> +	p_sw_tbl = &p_mgr->p_subn->sw_guid_tbl;
> +	p_sw = (osm_switch_t *) cl_qmap_head(p_sw_tbl);
> +	while (p_sw != (osm_switch_t *) cl_qmap_end(p_sw_tbl)) {
> +		ret = __osm_mcast_mgr_set_tbl(p_mgr, p_sw);
> +		if (ret == OSM_SIGNAL_DONE_PENDING)
> +			signal = ret;
> +		p_sw = (osm_switch_t *) cl_qmap_next(&p_sw->map_item);
>  	}
>  
> +	osm_dump_mcast_routes(p_mgr->p_subn->p_osm);
> +
>  	CL_PLOCK_RELEASE(p_mgr->p_lock);
>  	OSM_LOG_EXIT(p_mgr->p_log);
>  	return signal;
> diff --git a/opensm/opensm/osm_sm.c b/opensm/opensm/osm_sm.c
> index 88e6d4a..b295a77 100644
> --- a/opensm/opensm/osm_sm.c
> +++ b/opensm/opensm/osm_sm.c
> @@ -144,6 +144,7 @@ void osm_sm_construct(IN osm_sm_t * const p_sm)
>  	cl_event_construct(&p_sm->signal_event);
>  	cl_event_construct(&p_sm->subnet_up_event);
>  	cl_thread_construct(&p_sm->sweeper);
> +	cl_spinlock_construct(&p_sm->mgrp_lock);
>  	osm_req_construct(&p_sm->req);
>  	osm_resp_construct(&p_sm->resp);
>  	osm_ni_rcv_construct(&p_sm->ni_rcv);
> @@ -245,6 +246,7 @@ void osm_sm_destroy(IN osm_sm_t * const p_sm)
>  	cl_event_destroy(&p_sm->signal_event);
>  	cl_event_destroy(&p_sm->subnet_up_event);
>  	cl_spinlock_destroy(&p_sm->signal_lock);
> +	cl_spinlock_destroy(&p_sm->mgrp_lock);
>  
>  	osm_log(p_sm->p_log, OSM_LOG_SYS, "Exiting SM\n");	/* Format Waived */
>  	OSM_LOG_EXIT(p_sm->p_log);
> @@ -292,6 +294,12 @@ osm_sm_init(IN osm_sm_t * const p_sm,
>  	if (status != CL_SUCCESS)
>  		goto Exit;
>  
> +	cl_qlist_init(&p_sm->mgrp_list);
> +
> +	status = cl_spinlock_init(&p_sm->mgrp_lock);
> +	if (status != CL_SUCCESS)
> +		goto Exit;
> +
>  	status = osm_sm_mad_ctrl_init(&p_sm->mad_ctrl,
>  				      p_sm->p_subn,
>  				      p_sm->p_mad_pool,
> @@ -551,32 +559,43 @@ osm_sm_bind(IN osm_sm_t * const p_sm, IN const ib_net64_t port_guid)
>  /**********************************************************************
>   **********************************************************************/
>  static ib_api_status_t
> -__osm_sm_mgrp_connect(IN osm_sm_t * const p_sm,
> +__osm_sm_mgrp_process(IN osm_sm_t * const p_sm,
>  		      IN osm_mgrp_t * const p_mgrp,
>  		      IN const ib_net64_t port_guid,
>  		      IN osm_mcast_req_type_t req_type)
>  {
> -	ib_api_status_t status;
>  	osm_mcast_mgr_ctxt_t *ctx2;
>  
> -	OSM_LOG_ENTER(p_sm->p_log, __osm_sm_mgrp_connect);
> -
>  	/*
>  	 * 'Schedule' all the QP0 traffic for when the state manager
>  	 * isn't busy trying to do something else.
>  	 */
>  	ctx2 = (osm_mcast_mgr_ctxt_t *) malloc(sizeof(osm_mcast_mgr_ctxt_t));
> +	if (!ctx2)
> +		return IB_ERROR;
> +	memset(ctx2, 0, sizeof(*ctx2));
>  	memcpy(&ctx2->mlid, &p_mgrp->mlid, sizeof(p_mgrp->mlid));
>  	ctx2->req_type = req_type;
>  	ctx2->port_guid = port_guid;
>  
> -	status = osm_state_mgr_process_idle(&p_sm->state_mgr,
> -					    osm_mcast_mgr_process_mgrp_cb,
> -					    NULL, &p_sm->mcast_mgr,
> -					    (void *)ctx2);
> +	cl_spinlock_acquire(&p_sm->mgrp_lock);
> +	cl_qlist_insert_tail(&p_sm->mgrp_list, &ctx2->list_item);
> +	cl_spinlock_release(&p_sm->mgrp_lock);
>  
> -	OSM_LOG_EXIT(p_sm->p_log);
> -	return (status);
> +	osm_sm_signal(p_sm, OSM_SIGNAL_IDLE_TIME_PROCESS_REQUEST);
> +
> +	return IB_SUCCESS;
> +}
> +
> +/**********************************************************************
> + **********************************************************************/
> +static ib_api_status_t
> +__osm_sm_mgrp_connect(IN osm_sm_t * const p_sm,
> +		      IN osm_mgrp_t * const p_mgrp,
> +		      IN const ib_net64_t port_guid,
> +		      IN osm_mcast_req_type_t req_type)
> +{
> +	return __osm_sm_mgrp_process(p_sm, p_mgrp, port_guid, req_type);
>  }
>  
>  /**********************************************************************
> @@ -586,31 +605,7 @@ __osm_sm_mgrp_disconnect(IN osm_sm_t * const p_sm,
>  			 IN osm_mgrp_t * const p_mgrp,
>  			 IN const ib_net64_t port_guid)
>  {
> -	ib_api_status_t status;
> -	osm_mcast_mgr_ctxt_t *ctx2;
> -
> -	OSM_LOG_ENTER(p_sm->p_log, __osm_sm_mgrp_disconnect);
> -
> -	/*
> -	 * 'Schedule' all the QP0 traffic for when the state manager
> -	 * isn't busy trying to do something else.
> -	 */
> -	ctx2 = (osm_mcast_mgr_ctxt_t *) malloc(sizeof(osm_mcast_mgr_ctxt_t));
> -	memcpy(&ctx2->mlid, &p_mgrp->mlid, sizeof(p_mgrp->mlid));
> -	ctx2->req_type = OSM_MCAST_REQ_TYPE_LEAVE;
> -	ctx2->port_guid = port_guid;
> -
> -	status = osm_state_mgr_process_idle(&p_sm->state_mgr,
> -					    osm_mcast_mgr_process_mgrp_cb,
> -					    NULL, &p_sm->mcast_mgr, ctx2);
> -	if (status != IB_SUCCESS) {
> -		osm_log(p_sm->p_log, OSM_LOG_ERROR,
> -			"__osm_sm_mgrp_disconnect: ERR 2E11: "
> -			"Failure processing multicast group (%s)\n",
> -			ib_get_err_str(status));
> -	}
> -
> -	OSM_LOG_EXIT(p_sm->p_log);
> +	__osm_sm_mgrp_process(p_sm, p_mgrp, port_guid, OSM_MCAST_REQ_TYPE_LEAVE);
>  }
>  
>  /**********************************************************************
> @@ -719,8 +714,8 @@ osm_sm_mcgrp_join(IN osm_sm_t * const p_sm,
>  		goto Exit;
>  	}
>  
> -	CL_PLOCK_RELEASE(p_sm->p_lock);
>  	status = __osm_sm_mgrp_connect(p_sm, p_mgrp, port_guid, req_type);
> +	CL_PLOCK_RELEASE(p_sm->p_lock);
>  
>        Exit:
>  	OSM_LOG_EXIT(p_sm->p_log);
> @@ -782,9 +777,8 @@ osm_sm_mcgrp_leave(IN osm_sm_t * const p_sm,
>  
>  	osm_port_remove_mgrp(p_port, mlid);
>  
> -	CL_PLOCK_RELEASE(p_sm->p_lock);
> -
>  	__osm_sm_mgrp_disconnect(p_sm, p_mgrp, port_guid);
> +	CL_PLOCK_RELEASE(p_sm->p_lock);
>  
>        Exit:
>  	OSM_LOG_EXIT(p_sm->p_log);
> diff --git a/opensm/opensm/osm_state_mgr.c b/opensm/opensm/osm_state_mgr.c
> index 5c39f11..d4dd782 100644
> --- a/opensm/opensm/osm_state_mgr.c
> +++ b/opensm/opensm/osm_state_mgr.c
> @@ -76,7 +76,6 @@ osm_signal_t osm_qos_setup(IN osm_opensm_t * p_osm);
>  void osm_state_mgr_construct(IN osm_state_mgr_t * const p_mgr)
>  {
>  	memset(p_mgr, 0, sizeof(*p_mgr));
> -	cl_spinlock_construct(&p_mgr->idle_lock);
>  	p_mgr->state = OSM_SM_STATE_INIT;
>  }
>  
> @@ -88,9 +87,6 @@ void osm_state_mgr_destroy(IN osm_state_mgr_t * const p_mgr)
>  
>  	OSM_LOG_ENTER(p_mgr->p_log, osm_state_mgr_destroy);
>  
> -	/* destroy the locks */
> -	cl_spinlock_destroy(&p_mgr->idle_lock);
> -
>  	OSM_LOG_EXIT(p_mgr->p_log);
>  }
>  
> @@ -112,8 +108,6 @@ osm_state_mgr_init(IN osm_state_mgr_t * const p_mgr,
>  		   IN cl_event_t * const p_subnet_up_event,
>  		   IN osm_log_t * const p_log)
>  {
> -	cl_status_t status;
> -
>  	OSM_LOG_ENTER(p_log, osm_state_mgr_init);
>  
>  	CL_ASSERT(p_subn);
> @@ -145,17 +139,8 @@ osm_state_mgr_init(IN osm_state_mgr_t * const p_mgr,
>  	p_mgr->p_lock = p_lock;
>  	p_mgr->p_subnet_up_event = p_subnet_up_event;
>  
> -	cl_qlist_init(&p_mgr->idle_time_list);
> -
> -	status = cl_spinlock_init(&p_mgr->idle_lock);
> -	if (status != CL_SUCCESS) {
> -		osm_log(p_mgr->p_log, OSM_LOG_ERROR,
> -			"osm_state_mgr_init: ERR 3302: "
> -			"Spinlock init failed (%s)\n", CL_STATUS_MSG(status));
> -	}
> -
>  	OSM_LOG_EXIT(p_mgr->p_log);
> -	return (status);
> +	return IB_SUCCESS;
>  }
>  
>  /**********************************************************************
> @@ -989,79 +974,6 @@ static ib_api_status_t __osm_state_mgr_light_sweep_start(IN osm_state_mgr_t *
>  }
>  
>  /**********************************************************************
> - **********************************************************************/
> -static void __process_idle_time_queue_done(IN osm_state_mgr_t * const p_mgr)
> -{
> -	cl_qlist_t *p_list = &p_mgr->idle_time_list;
> -	cl_list_item_t *p_list_item;
> -	osm_idle_item_t *p_process_item;
> -
> -	OSM_LOG_ENTER(p_mgr->p_log, __process_idle_time_queue_done);
> -
> -	cl_spinlock_acquire(&p_mgr->idle_lock);
> -	p_list_item = cl_qlist_remove_head(p_list);
> -
> -	if (p_list_item == cl_qlist_end(p_list)) {
> -		cl_spinlock_release(&p_mgr->idle_lock);
> -		osm_log(p_mgr->p_log, OSM_LOG_ERROR,
> -			"__process_idle_time_queue_done: ERR 3314: "
> -			"Idle time queue is empty\n");
> -		return;
> -	}
> -	cl_spinlock_release(&p_mgr->idle_lock);
> -
> -	p_process_item = (osm_idle_item_t *) p_list_item;
> -
> -	if (p_process_item->pfn_done) {
> -
> -		p_process_item->pfn_done(p_process_item->context1,
> -					 p_process_item->context2);
> -	}
> -
> -	free(p_process_item);
> -
> -	OSM_LOG_EXIT(p_mgr->p_log);
> -	return;
> -}
> -
> -/**********************************************************************
> - **********************************************************************/
> -static osm_signal_t __process_idle_time_queue_start(IN osm_state_mgr_t *
> -						    const p_mgr)
> -{
> -	cl_qlist_t *p_list = &p_mgr->idle_time_list;
> -	cl_list_item_t *p_list_item;
> -	osm_idle_item_t *p_process_item;
> -	osm_signal_t signal;
> -
> -	OSM_LOG_ENTER(p_mgr->p_log, __process_idle_time_queue_start);
> -
> -	cl_spinlock_acquire(&p_mgr->idle_lock);
> -
> -	p_list_item = cl_qlist_head(p_list);
> -	if (p_list_item == cl_qlist_end(p_list)) {
> -		cl_spinlock_release(&p_mgr->idle_lock);
> -		OSM_LOG_EXIT(p_mgr->p_log);
> -		return OSM_SIGNAL_NONE;
> -	}
> -
> -	cl_spinlock_release(&p_mgr->idle_lock);
> -
> -	p_process_item = (osm_idle_item_t *) p_list_item;
> -
> -	CL_ASSERT(p_process_item->pfn_start);
> -
> -	signal =
> -	    p_process_item->pfn_start(p_process_item->context1,
> -				      p_process_item->context2);
> -
> -	CL_ASSERT(signal != OSM_SIGNAL_NONE);
> -
> -	OSM_LOG_EXIT(p_mgr->p_log);
> -	return signal;
> -}
> -
> -/**********************************************************************
>   * Go over all the remote SMs (as updated in the sm_guid_tbl).
>   * Find if there is a remote sm that is a master SM.
>   * If there is a remote master SM - return a pointer to it,
> @@ -1558,7 +1470,7 @@ void osm_state_mgr_process(IN osm_state_mgr_t * const p_mgr,
>  		case OSM_SM_STATE_PROCESS_REQUEST:
>  			switch (signal) {
>  			case OSM_SIGNAL_IDLE_TIME_PROCESS:
> -				signal = __process_idle_time_queue_start(p_mgr);
> +				signal = osm_mcast_mgr_process_mgroups(p_mgr->p_mcast_mgr);
>  				switch (signal) {
>  				case OSM_SIGNAL_NONE:
>  					p_mgr->state = OSM_SM_STATE_IDLE;
> @@ -1604,14 +1516,6 @@ void osm_state_mgr_process(IN osm_state_mgr_t * const p_mgr,
>  			switch (signal) {
>  			case OSM_SIGNAL_NO_PENDING_TRANSACTIONS:
>  			case OSM_SIGNAL_DONE:
> -				/* CALL the done function */
> -				__process_idle_time_queue_done(p_mgr);
> -
> -				/*
> -				 * Set the signal to OSM_SIGNAL_IDLE_TIME_PROCESS
> -				 * so that the next element in the queue gets processed
> -				 */
> -
>  				signal = OSM_SIGNAL_IDLE_TIME_PROCESS;
>  				p_mgr->state = OSM_SM_STATE_PROCESS_REQUEST;
>  				break;
> @@ -2424,41 +2328,3 @@ void osm_state_mgr_process(IN osm_state_mgr_t * const p_mgr,
>  
>  	OSM_LOG_EXIT(p_mgr->p_log);
>  }
> -
> -/**********************************************************************
> - **********************************************************************/
> -ib_api_status_t
> -osm_state_mgr_process_idle(IN osm_state_mgr_t * const p_mgr,
> -			   IN osm_pfn_start_t pfn_start,
> -			   IN osm_pfn_done_t pfn_done, void *context1,
> -			   void *context2)
> -{
> -	osm_idle_item_t *p_idle_item;
> -
> -	OSM_LOG_ENTER(p_mgr->p_log, osm_state_mgr_process_idle);
> -
> -	p_idle_item = malloc(sizeof(osm_idle_item_t));
> -	if (p_idle_item == NULL) {
> -		osm_log(p_mgr->p_log, OSM_LOG_ERROR,
> -			"osm_state_mgr_process_idle: ERR 3321: "
> -			"insufficient memory\n");
> -		return IB_ERROR;
> -	}
> -
> -	memset(p_idle_item, 0, sizeof(osm_idle_item_t));
> -	p_idle_item->pfn_start = pfn_start;
> -	p_idle_item->pfn_done = pfn_done;
> -	p_idle_item->context1 = context1;
> -	p_idle_item->context2 = context2;
> -
> -	cl_spinlock_acquire(&p_mgr->idle_lock);
> -	cl_qlist_insert_tail(&p_mgr->idle_time_list, &p_idle_item->list_item);
> -	cl_spinlock_release(&p_mgr->idle_lock);
> -
> -	osm_sm_signal(&p_mgr->p_subn->p_osm->sm,
> -		      OSM_SIGNAL_IDLE_TIME_PROCESS_REQUEST);
> -
> -	OSM_LOG_EXIT(p_mgr->p_log);
> -
> -	return IB_SUCCESS;
> -}



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