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  1. 04 Mar, 2015 6 commits
    • Xin Zhao's avatar
      Allow the channel layer to implement Win_gather_info function. · 9dbcae0c
      Xin Zhao authored 
      

In this patch, we first add a function pointer of Win_gather_info
in CH3 to allow different channel layers to implement their own
version of Win_gather_info function. The function pointer is
initially set to the default implementation in CH3 layer. If the
channel layer provides an implementation of Win_gather_info, it
will override the function pointer.

Secondly, we provide an implementation of Win_gather_info in the
Nemesis layer. In this implementation, we allocate basic_info_table[]
in the SHM region, so that processes on the same node can share the
same base_info_table[].
Signed-off-by: Pavan Balaji's avatarPavan Balaji <balaji@anl.gov>
      9dbcae0c
    • Xin Zhao's avatar
      Add a function hook to initialize window attributes in channel layer. · 7c1a8fb1
      Xin Zhao authored 
      

There are some window attributes in the channel layer that
needs to be initialized during window creation. In this
patch, we first add a win_hooks table that contains pointers
to the channel's implementation of the function hooks. Secondly,
we add a function hook 'win_init' to allow the channel layer to
initialize its own attributes. The hook is called from the
CH3 win_init function.
Signed-off-by: Pavan Balaji's avatarPavan Balaji <balaji@anl.gov>
      7c1a8fb1
    • Xin Zhao's avatar
      Reduce size of shm_base_addrs[] from comm_size to node_size. · eddd8b91
      Xin Zhao authored 
      

Given one process, shm_base_addrs[] is used to store the base
addresses (in the address space of this process) of SHM window
on other processes. The original size of it is comm_size. However,
the maximum number of SHM windows that this process can access
to is node_size instead of comm_size, which results in a waste
of memory since most slots in the array is NULL. In this patch
we reduce the size of shm_base_addrs[] from comm_size to node_size.
Signed-off-by: Pavan Balaji's avatarPavan Balaji <balaji@anl.gov>
      eddd8b91
    • Xin Zhao's avatar
      Store window basic attributes into a struct on window. · 9404e953
      Xin Zhao authored 
      

In this patch, we gather window basic attributes of other
processes (base_addr, size, disp_unit, win_handle) using a
struct called "basic_info_table". By doing this, we can use
one contiguous memory region to store them.
Signed-off-by: Pavan Balaji's avatarPavan Balaji <balaji@anl.gov>
      9404e953
    • Xin Zhao's avatar
      Change name of MPIDI_CH3U_Win_create_gather to MPIDI_CH3U_Win_gather_info. · 131e06ef
      Xin Zhao authored 
      

Function MPIDI_CH3U_Win_create_gather exchanges the window
information among processes. It does not create new window.
Here we change the function name to a more suitable one.
Signed-off-by: Pavan Balaji's avatarPavan Balaji <balaji@anl.gov>
      131e06ef
    • Xin Zhao's avatar
      Add CH3 APIs and macros to allow channel to implement Alloc_mem/Free_mem. · 03d4c77b
      Xin Zhao authored 
      

Originally MPIDI_Alloc_mem(size, info) and MPIDI_Free_mem(base_ptr)
in CH3 layer are implemented by calling MPIU_Malloc(size) and
MPIU_Free(base_ptr) internally. This makes the underlying hardware
be unable to develop a specific implementation of Alloc_mem and Free_mem,
which is necessary when registering memory for RDMA operations.

This patch defines new APIs, MPIDI_CH3I_Alloc_mem(size, info)
and MPIDI_CH3I_Free_mem(base_ptr), to allow channels to implement
their own memory allocators. If the channel does not have its own
implementation, MPICH will fallback to the default implementation
in CH3 layer which uses MPIU_Malloc and MPIU_Free.

Thanks to Steffen Christgau <christgau@cs.uni-potsdam.de> for
this contribution.
Signed-off-by: Pavan Balaji's avatarPavan Balaji <balaji@anl.gov>
      03d4c77b
  3. 03 Mar, 2015 3 commits
  5. 02 Mar, 2015 7 commits
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  15. 24 Feb, 2015 1 commit
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  19. 19 Feb, 2015 1 commit