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From: Sasha Khapyorsky <sashak-smomgflXvOZWk0Htik3J/w@public.gmane.org>
To: OpenIB
	<general-ZwoEplunGu1OwGhvXhtEPSCwEArCW2h5@public.gmane.org>,
	linux-rdma <linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>
Cc: Hal Rosenstock <hal.rosenstock-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Subject: [PATCH] opensm/osm_get_port_by_lid(): speedup a port lookup
Date: Tue, 29 Sep 2009 13:02:44 +0200	[thread overview]
Message-ID: <20090929110244.GL26931@me> (raw)
In-Reply-To: <20090929110215.GK26931@me>


Speedup a port lookup over LMC array - it is not necessary to match LMC
exactly for found port because base lid should be equal to requested lid
masked value, so '<=' comparison should be enough and we don't need to
loop up to an actual port's lmc value match.

Signed-off-by: Sasha Khapyorsky <sashak-smomgflXvOZWk0Htik3J/w@public.gmane.org>
---
 opensm/opensm/osm_subnet.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/opensm/opensm/osm_subnet.c b/opensm/opensm/osm_subnet.c
index 67bc7e1..30f8af5 100644
--- a/opensm/opensm/osm_subnet.c
+++ b/opensm/opensm/osm_subnet.c
@@ -661,7 +661,7 @@ osm_port_t *osm_get_port_by_lid(IN osm_subn_t const * subn, IN ib_net16_t lid)
 		port = cl_ptr_vector_get(&subn->port_lid_tbl, base_lid);
 		/* Determine if base LID "tested" is the real base LID */
 		/* This is true if the LMC "tested" is the port's actual LMC */
-		if (port && lmc == osm_port_get_lmc(port))
+		if (port && lmc <= osm_port_get_lmc(port))
 			return port;
 	}
 
-- 
1.6.5.rc1

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  reply	other threads:[~2009-09-29 11:02 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-09-29 11:02 [PATCH] opensm/osm_get_port_by_lid(): use faster cl_ptr_vector_get() Sasha Khapyorsky
2009-09-29 11:02 ` Sasha Khapyorsky [this message]
2009-09-29 11:03   ` [PATCH] opensm/osm_get_port_by_lid(): don't bother with lmc Sasha Khapyorsky

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