PSM2 is the only valid implementation for OmniPath (OPA).  UCX also
supports OmniPath, but it does so via Verbs, thus getting much lower
performance (typically 3 GiB/s instead of 10 GiB/s).

To work around that, give the mtl_psm2 component a higher priority
than the pml_ucx component.

See <https://www.mail-archive.com/users@lists.open-mpi.org/msg33581.html>.

--- openmpi-4.0.2/ompi/mca/mtl/psm2/mtl_psm2_component.c	2019-11-15 17:06:15.142076840 +0100
+++ openmpi-4.0.2/ompi/mca/mtl/psm2/mtl_psm2_component.c	2019-11-15 17:06:22.242009379 +0100
@@ -126,7 +126,7 @@ ompi_mtl_psm2_component_register(void)
         setenv("PSM2_DEVICES", "self,shm", 0);
     }
 
-    param_priority = 40;
+    param_priority = 55;
     (void) mca_base_component_var_register (&mca_mtl_psm2_component.super.mtl_version,
                                             "priority", "Priority of the PSM2 MTL component",
                                             MCA_BASE_VAR_TYPE_INT, NULL, 0, 0,

Likewise for PSM: we want InfiniPath to be taken care of by PSM, not by UCX,
since UCX achieves worse performance.

--- openmpi-4.0.2/ompi/mca/mtl/psm/mtl_psm_component.c
+++ openmpi-4.0.2/ompi/mca/mtl/psm/mtl_psm_component.c
@@ -92,7 +92,7 @@ ompi_mtl_psm_component_register(void)
 
 
     /* set priority high enough to beat ob1's default */
-    param_priority = 30;
+    param_priority = 54;
     (void) mca_base_component_var_register (&mca_mtl_psm_component.super.mtl_version,
                                             "priority", "Priority of the PSM MTL component",
                                             MCA_BASE_VAR_TYPE_INT, NULL, 0, 0,
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<div class='path'>path: <a href='/guix/log/?id=932a60812a620c9dcc5b0e327da27edd20732911'>root</a>/<a href='/guix/log/gnu?id=932a60812a620c9dcc5b0e327da27edd20732911'>gnu</a>/<a href='/guix/log/gnu/packages?id=932a60812a620c9dcc5b0e327da27edd20732911'>packages</a>/<a href='/guix/log/gnu/packages/node.scm?id=932a60812a620c9dcc5b0e327da27edd20732911'>node.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/gnu/packages/node.scm?id=932a60812a620c9dcc5b0e327da27edd20732911&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2022-08-30 18:42:26 +0200'>2022-08-30</span></td><td><a href='/guix/commit/gnu/packages/node.scm?id=db2444ad824ab529fd9e850dbae42359009ac4a2'>gnu: Introduce versioned 'openssl-1.1' variable.</a><span class='msg-avail'>...<span class='msg-tooltip'>...and use it in packages that do not yet support 3.0.

* gnu/packages/tls.scm (openssl): Rename to ...
(openssl-1.1): ... this.
(openssl/fixed): Inherit from OPENSSL-1.1.
(openssl-3.0): Likewise.
(openssl): Turn into alias for OPENSSL-1.1.
* gnu/packages/ruby.scm (ruby-2.6)[inputs]: Change from OPENSSL to OPENSSL-1.1.
(ruby-3.0)[inputs]: Change "openssl" input to OPENSSL.
(ruby-3.1): Inherit from RUBY-3.0.
* gnu/packages/python.scm (python-2.7)[inputs]: Change from OPENSSL to
OPENSSL-1.1.
(python-3.9)[inputs]: Replace "openssl" with OPENSSL.
* gnu/packages/python-crypto.scm (python-cryptography)[inputs]: Change from
OPENSSL to OPENSSL-1.1.
* gnu/packages/databases.scm (mariadb)[inputs]: Likewise.
* gnu/packages/node.scm (node)[native-inputs, inputs]: Likewise.
(node-lts)[native-inputs]: Likewise.
</span></span></td><td>Marius Bakke</td></tr>
<tr><td><span title='2022-08-02 00:45:41 +0300'>2022-08-02</span></td><td><a href='/guix/commit/gnu/packages/node.scm?id=1085514a1899f24e8a17f46c186e55169337272d'>gnu: node-lts: Build with icu4c-71.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/node.scm (node-lts)[inputs]: Replace icu4c-70 with
icu4c-71.
[native-inputs]: Same.
</span></span></td><td>Efraim Flashner</td></tr>
<tr><td><span title='2022-06-06 15:38:23 +0200'>2022-06-06</span></td><td><a href='/guix/commit/gnu/packages/node.scm?id=e71f35df74f970a93e0b178fc5a294781b88883a'>gnu: node: Fix cross-compilation.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/node.scm (node)[phases]{configure}: Unwind the stack before
invoking the exception handler.
{patch-hardcoded-program-references}: Use search-input-file where appropriate.
</span></span></td><td>Jelle Licht</td></tr>
<tr><td><span title='2022-06-06 15:38:18 +0200'>2022-06-06</span></td><td><a href='/guix/commit/gnu/packages/node.scm?id=6b96ef08b927f630f7a98b11b466bd445b58d10d'>gnu: node-lts: Update to 14.19.3.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages/node.scm (node-lts): Update to 14.19.3.
[arguments]: Disable test that requires networking.
[native-inputs]: Replace icu4c-67 with icu4c-70.
[inputs]: Replace icu4c-67 with icu4c-70.
</span></span></td><td>Jelle Licht</td></tr>