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Set up issue #4

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mycatnamedweb opened this issue Nov 6, 2018 · 0 comments
Open

Set up issue #4

mycatnamedweb opened this issue Nov 6, 2018 · 0 comments

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@mycatnamedweb
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mycatnamedweb commented Nov 6, 2018 •
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Hi,
I'm trying to run a latency test for the first time but I get an error when I try to execute it.

My steps:

  • Downloaded and unzipped the repo on the box on which I want to run the server for the test

  • Executed:
    ./autogen
    ./configure
    make clean && make V=1
    ./ib_send_lat --duration=30 -H

    Port number 1 state is Down
    Couldn't set the link layer
    Couldn't get context for the device

What am I doing wrong?

Running other tests using RDMA (eg. the ones in Accelio) the system shows no problems.

Thanks
drossetti pushed a commit that referenced this issue May 12, 2021
@Honggang-LI
Don't call ibv_qp_to_qp_ex when hardware does not support extended QP
d30e91e 
The sizeof 'struct ibv_qp' allocated by ibv_create_qp is 160.
If the memory holds the 'struct ibv_qp' was allocated at the
upper boundary of a memory page, cast it to 'struct verbs_qp',
whose size is 360, may across the memory page boundary. It will
trigger invalid memory access to the next memory page.

The issue can be reproduced with OPA and QIB HCA.

For example run over OPA:
 Server Node: $ ib_read_bw -F -N -n 1000 -u 20 -q 257 -s 4194304
 Client Node: $ ib_read_bw -F -N -n 1000 -u 20 -q 257 -s 4194304 <sever>

 Program received signal SIGSEGV, Segmentation fault.
 ibv_qp_to_qp_ex (qp=0x5555557a5f10) at libibverbs/verbs.c:624
 624             if (vqp->comp_mask & VERBS_QP_EX)
 (gdb) bt
 #0  ibv_qp_to_qp_ex (qp=0x5555557a5f10) at libibverbs/verbs.c:624
 #1  0x000055555556af4a in create_reg_qp_main (ctx=ctx@entry=0x7fffffffd500, user_param=user_param@entry=0x7fffffffd670, i=i@entry=21, num_of_qps=num_of_qps@entry=128)  at src/perftest_resources.c:1597
 #2  0x000055555556b6d7 in create_qp_main (num_of_qps=<optimized out>, i=21,  user_param=0x7fffffffd670, ctx=0x7fffffffd500) at src/perftest_resources.c:1613
 #3  ctx_init (ctx=0x7fffffffd500, user_param=0x7fffffffd670) at src/perftest_resources.c:1552
 #4  0x0000555555558e9c in main (argc=<optimized out>, argv=<optimized out>) at  src/read_bw.c:149

624             if (vqp->comp_mask & VERBS_QP_EX)
(gdb) p qp
$1 = (struct ibv_qp *) 0x5555557a5f10
(gdb) p vqp
$2 = (struct verbs_qp *) 0x5555557a5f10
(gdb) p *qp
$3 = {context = 0x55555578ad00, qp_context = 0x0, ....
(gdb) p *vqp
Cannot access memory at address 0x5555557a6000

Signed-off-by: Honggang Li <[email protected]>
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