Index of /downloads/dapl

 Name                    Last modified      Size  Description
 Parent Directory                             -   
 README.html             22-Jul-2008 00:36  3.2K  
 WEB_README              30-Apr-2008 16:46  326   
 archive/                15-Feb-2008 11:01    -   
 compat-dapl-1.2.8.ta..> 23-Jun-2008 12:32  654K  
 dapl-1.2.3.tar.gz       31-Oct-2007 12:47  605K  
 dapl-1.2.4.tar.gz       28-Jan-2008 16:28  605K  
 dapl-1.2.5.tar.gz       15-Feb-2008 10:58  606K  
 dapl-1.2.6.tar.gz       01-May-2008 10:38  611K  
 dapl-1.2.7.tar.gz       21-May-2008 15:23  625K  
 dapl-2.0.3.tar.gz       20-Nov-2007 12:39  625K  
 dapl-2.0.4.tar.gz       28-Jan-2008 16:26  633K  
 dapl-2.0.5.tar.gz       29-Jan-2008 16:40  633K  
 dapl-2.0.6.tar.gz       04-Feb-2008 16:22  633K  
 dapl-2.0.7.tar.gz       15-Feb-2008 10:58  634K  
 dapl-2.0.8.tar.gz       01-May-2008 10:38  641K  
 dapl-2.0.9.tar.gz       21-May-2008 15:23  656K  
 dapl-2.0.10.tar.gz      23-Jun-2008 12:32  691K  
 dapl-2.0.11.tar.gz      22-Jul-2008 00:06  695K  
 documentation/          26-Feb-2008 22:27    -

Direct Access Transport Libraries - v1 and v2

User space libraries/utilities for Direct Access Transport (DAT). DAT is a transport-independent, platform-independent Application Programming Interface that supports RDMA (remote direct memory access) devices. Directory includes packages that include libdat, libdapl, and utilities for both DAT API Spec Version 1.2 and 2.0.

New Feature Summary

1. The new socket CM provider, libdaplscm.so (1.2.8), libdaploscm.so (2.0.11) assumes homogeneous cluster and will setup the QP's based on local HCA port attributes and exchanges QP information via socket's using the hostname of each node. IPoIB and rdma_cm are NOT required for this provider. QP attributes can be adjusted via the following environment parameters:

DAPL_ACK_TIMER (default=15 5 bits, 4.096us*2^ack_timer. 15 == 134ms)

DAPL_ACK_RETRY (default=7 3 bits, 7 * 134ms = 940ms)

DAPL_RNR_TIMER (default=28 5 bits, 28 == 163ms, 31 == 491ms)

DAPL_RNR_RETRY (default=7 3 bits, 7 == infinite)

The new socket cm entries in /etc/dat.conf provide a link to the actual HCA device and port. Example v1 and v2 entries for a Mellanox connectx device, port 1:

OpenIB-mlx4_0-1 u1.2 nonthreadsafe default libdaplscm.so.1 dapl.1.2 "mlx4_0 1" ""

ofa-v2-mlx4_0-1 u2.0 nonthreadsafe default libdaploscm.so.2 dapl.2.0 "mlx4_0 1" ""

This new socket cm provider, was successfully tested on the TATA CRL cluster (#8 on Top500) with Intel MPI, achieving a HPLinpack score of 132.8TFlops on 1798 nodes, 14384 cores at ~76.9% of peak. DAPL_ACK_TIMER was increased to 21 for this scale.

2. New definitions for IB unreliable datagram extension

Extended EP dat_service_type, with DAT_IB_SERVICE_TYPE_UD

Add IB extension call dat_ib_post_send_ud().

Add address handle definition for UD calls.

Add IB event definitions to provide remote AH via connect and connect requests

See dtestx (-d) source for example usage model

Latest Packages (see ChangeLog for recent changes):

md5sum: 39a825669913ff4622ee2b120a9a7409 compat-dapl-1.2.8.tar.gz
md5sum: 7247bade3fc0c075410ee41e386425c8 dapl-2.0.11.tar.gz

For 1.2 and 2.0 support on same system, including development, install RPM packages as follow:

compat-dapl-1.2.8-1
compat-dapl-devel-1.2.8-1
dapl-2.0.11-1
dapl-utils-2.0.11-1
dapl-devel-2.0.11-1
dapl-debuginfo-2.0.11-1

Summary of changes for last release:

v2 - added IB UD extensions, dat_ib_post_send_ud()
v1,v2 - socket cm provider added for better scalability
v1 - package v1.2 as compat-dapl

For more details see the following:

documentation/uDAPL_v20.pdf for v2 API specification
documentation/transition_to_dat20_120406.pdf for details on porting to 2.0
documentation/DAT_IB_Extensions.pdf for IB extension details.
documentation/DAT_IW_Extensions.pdf for iWARP extension details.
documentation/uDAPL_ofed_testing_bkm.pdf for latest uDAPL OFED BKM, updated 5-14-2008

uDAT/uDAPL source git tree is located at git://git.openfabrics.org/~ardavis/scm/dapl.git