Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

coll/han: Implement MPI_Alltoallv in han using SMSC and XPMEM #12747

Merged
merged 1 commit into from
Aug 19, 2024
Merged

coll/han: Implement MPI_Alltoallv in han using SMSC and XPMEM #12747

merged 1 commit into from
Aug 19, 2024

Commits on Aug 13, 2024

  1. coll/han: Implement MPI_Alltoallv in han using SMSC and XPMEM 

    Extension of the previous han MPI_Alltoall algorithm, this change adds
MPI_Alltoallv to han for a hierarchy-aware algorithm which uses XPMEM
via the SMSC module in order to directly read data from ranks on the
same host.

The provides significant speed-up over the basic implementation when
small messages are used, as many messages can be coalesced and packed
into fewer sends.

Introduces MCA parameters:
 - coll_han_alltoallv_smsc_avg_send_limit
 - coll_han_alltoallv_smsc_noncontig_limit

Signed-off-by: Luke Robison <[email protected]>
    @lrbison
    lrbison committed Aug 13, 2024
    Configuration menu
    Copy the full SHA
    3b69d98 View commit details
    Browse the repository at this point in the history