[dmitrygx]

What

Handle UCT AM short failure correctly in UCP progress functions.

Why ?

If AM short failed in a progress function (i.e. the status is neither UCS_OK nor UCS_ERR_NO_RESOURCE), a UCP request has to be completed with the status, but UCS_OK should be returned from a function to satisfy ucp_request_try_send() expectations that UCS_OK/UCS_INPROGRESS/UCS_ERR_NO_RESOURCE statuses could be returned from progress functions.

How ?

1. Introduce ucp_am_short_handle_status_from_pending() common function for AM Short to use in all TAG/AM/STREAM function as we have for AM Bcopy.
2. Use the new function to handle status from uct_ep_am_short() in TAG/AM/STREAM short progress functions.

backport of #6157 PR

[brminich]

Looks like PR description is taken from wrong PR

[dmitrygx]

Looks like PR description is taken from wrong PR

@brminich thanks!
fixed

[dmitrygx]

unrelated failure on r-vmb-ppc-jenkins node:

shm_ib/test_ucp_sockaddr_destroy_ep_on_err.onesided_client_sforce/4

http://hpc-master.lab.mtl.com:8080/blue/organizations/jenkins/ucx/detail/ucx/9292/pipeline/568

bot:pipe:retest

[brminich]

can error be relevant?

2021-01-20T20:44:57.0460335Z [ RUN      ] rc_mlx5/uct_flush_test.am_flush_ep_no_comp/0 <rc_mlx5/mlx5_1:1>
2021-01-20T20:44:57.0580903Z [     INFO ] Testing component: ib
2021-01-20T20:44:57.1214206Z [swx-rdmz-ucx-arm-hwi:14347:0:14347]       rc_ep.c:506  Assertion `!(ep->flags & UCT_RC_EP_FLAG_FLUSH_CANCEL)' failed
2021-01-20T20:44:57.1230226Z ==== backtrace (tid:  14347) ====
2021-01-20T20:44:57.1232260Z  0  /scrap/azure/agent-06/AZP_WORKSPACE/1/s/build-test/src/ucs/.libs/libucs.so.0(ucs_fatal_error_message+0xa0) [0xffff91b14fe8]
2021-01-20T20:44:57.1234277Z  1  /scrap/azure/agent-06/AZP_WORKSPACE/1/s/build-test/src/ucs/.libs/libucs.so.0(ucs_fatal_error_format+0xbc) [0xffff91b150a8]
2021-01-20T20:44:57.1236817Z  2  /scrap/azure/agent-06/AZP_WORKSPACE/1/s/build-test/src/uct/ib/.libs/libuct_ib.so.0(uct_rc_ep_check+0) [0xffff916baf80]
2021-01-20T20:44:57.1238718Z  3  /scrap/azure/agent-06/AZP_WORKSPACE/1/s/build-test/src/uct/ib/.libs/libuct_ib.so.0(uct_rc_mlx5_ep_flush+0x44) [0xffff916cfe60]
2021-01-20T20:44:57.1240323Z  4  /scrap/azure/agent-06/AZP_WORKSPACE/1/s/build-test/test/gtest/gtest() [0x61717c]
2021-01-20T20:44:57.1241747Z  5  /scrap/azure/agent-06/AZP_WORKSPACE/1/s/build-test/test/gtest/gtest() [0x6183f4]
2021-01-20T20:44:57.1243182Z  6  /scrap/azure/agent-06/AZP_WORKSPACE/1/s/build-test/test/gtest/gtest() [0x5bc58c]
2021-01-20T20:44:57.1244630Z  7  /scrap/azure/agent-06/AZP_WORKSPACE/1/s/build-test/test/gtest/gtest() [0x59fd84]
2021-01-20T20:44:57.1246050Z  8  /scrap/azure/agent-06/AZP_WORKSPACE/1/s/build-test/test/gtest/gtest() [0x59d4d0]
2021-01-20T20:44:57.1247495Z  9  /scrap/azure/agent-06/AZP_WORKSPACE/1/s/build-test/test/gtest/gtest() [0x59d1dc]
2021-01-20T20:44:57.1248982Z 10  /scrap/azure/agent-06/AZP_WORKSPACE/1/s/build-test/test/gtest/gtest() [0x59cf28]
2021-01-20T20:44:57.1250416Z 11  /scrap/azure/agent-06/AZP_WORKSPACE/1/s/build-test/test/gtest/gtest() [0x58cdd0]
2021-01-20T20:44:57.1251823Z 12  /scrap/azure/agent-06/AZP_WORKSPACE/1/s/build-test/test/gtest/gtest() [0x5a0bf4]
2021-01-20T20:44:57.1253580Z 13  /scrap/azure/agent-06/AZP_WORKSPACE/1/s/build-test/test/gtest/gtest() [0x58c8cc]
2021-01-20T20:44:57.1255080Z 14  /scrap/azure/agent-06/AZP_WORKSPACE/1/s/build-test/test/gtest/gtest() [0x5a8e14]
2021-01-20T20:44:57.1256476Z 15  /lib/aarch64-linux-gnu/libc.so.6(__libc_start_main+0xe0) [0xffff913386e0]
2021-01-20T20:44:57.1257858Z 16  /scrap/azure/agent-06/AZP_WORKSPACE/1/s/build-test/test/gtest/gtest() [0x57a0f4]
2021-01-20T20:44:57.1258712Z =================================
2021-01-20T20:44:57.1259883Z [swx-rdmz-ucx-arm-hwi:14347:0:14347] Process frozen...

[dmitrygx]

can error be relevant?

no, this is UCT test
changes in this PR are in UCP only

[yosefe]

@brminich @dmitrygx i think we are missing some fix in v1.10. where this assertion was replaced by ignoring?

[dmitrygx]

@brminich @dmitrygx i think we are missing some fix in v1.10. where this assertion was replaced by ignoring?

yes, good catch. did you mean #6055?
should we port it?

[yosefe]

yes, good catch. did you mean #6055?
should we port it?

Let's port, to make v1.10 pass tests