linux-kernel - Re: perf test vfs

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Date:   Mon, 23 Oct 2017 17:38:49 +0800
From:   Li Zhijian <zhijianx.li@...el.com>
To:     acme@...nel.org
Cc:     linux-kernel@...r.kernel.org, "Li, Philip" <philip.li@...el.com>
Subject: Re: perf test vfs_getname failed

Those cases can be passed on fedora-26 with the same kernel(and configuration) with rhel7.1
[root@...alhost perf]# ./perf test vfs_getname
60: Add vfs_getname probe to get syscall args filenames   : Ok
61: Use vfs_getname probe to get syscall args filenames   : Ok
62: Check open filename arg using perf trace + vfs_getname: Ok

totally, i tested at 3 distro
1. fedora-26: OK
2. ubuntu 16.04: FAIL
3. rhel7.1 beta: FAIL

Does it means that those cases are related to special distro(require special middle wares) ?


Thanks


On 10/19/2017 4:31 PM, Li Zhijian wrote:
> Hi Arnaldo
>
> i encounter some problem when running perf test, the details arelike 
> below:
>
> -----------------------------
>
> [lizj@...l71 perf]$ sudo ./perf test vfs_getname -v
> 61: Add vfs_getname probe to get syscall args filenames   :
> --- start ---
> test child forked, pid 5958
> Failed to find 'result' in this function.
>   Error: Failed to add events.
> test child finished with -1
> ---- end ----
> Add vfs_getname probe to get syscall args filenames: FAILED!
> 62: Use vfs_getname probe to get syscall args filenames   :
> --- start ---
> test child forked, pid 5979
> Failed to find 'result' in this function.
>   Error: Failed to add events.
> test child finished with -1
> ---- end ----
> Use vfs_getname probe to get syscall args filenames: FAILED!
> 63: Check open filename arg using perf trace + vfs_getname:
> --- start ---
> test child forked, pid 6001
> Failed to find 'result' in this function.
>   Error: Failed to add events.
> test child finished with -1
> ---- end ----
> Check open filename arg using perf trace + vfs_getname: FAILED!
> -----------------------------
>
> my environment:
> 1. perf features
> the enabled features are:
> -----------------------------
>
> Auto-detecting system features:
> ...                         dwarf: [ on  ]
> ...            dwarf_getlocations: [ on  ]
> ...                         glibc: [ on  ]
> ...                          gtk2: [ on  ]
> ...                      libaudit: [ on  ]
> ...                        libbfd: [ on  ]
> ...                        libelf: [ on  ]
> ...                       libnuma: [ on  ]
> ...        numa_num_possible_cpus: [ on  ]
> ...                       libperl: [ on  ]
> ...                     libpython: [ on  ]
> ...                      libslang: [ OFF ]
> ...                     libcrypto: [ on  ]
> ...                     libunwind: [ on  ]
> ...            libdw-dwarf-unwind: [ on  ]
> ...                          zlib: [ on  ]
> ...                          lzma: [ on  ]
> ...                     get_cpuid: [ on  ]
> ...                           bpf: [ on  ]
> -----------------------------
> 2. host
> [lizj@...l71 perf]$ cat /etc/redhat-release
> Red Hat Enterprise Linux Server release 7.1 Beta (Maipo)
>
> 3. kernel
> [lizj@...l71 perf]$ uname -a
> Linux rhel71 4.14.0-rc1+ #2 SMP Wed Oct 18 23:49:30 EDT 2017 x86_64 
> x86_64 x86_64 GNU/Linux
>
> if i miss something, fell free to let me know :)
>
> Thanks
>
> Zhijian
>
>