[PATCH 0/4] Add support of guest user space symbols for perf kvm command.

[Dongsheng Yang]

Hi all,
	This patch add support of guest user space symbols for perf kvm command.

Example:
        # perf kvm --guestmount /tmp/guestmount/ top
        Samples: 1K of event 'cycles', Event count (approx.): 259112905
         17.34%  libcrypto.so.1.0.1e  [u] 0x000000000007d971
          5.60%  [guest.kernel]       [g] kallsyms_expand_symbol
          5.44%  libcrypto.so.1.0.1e  [u] md5_block_asm_data_order
          4.09%  [guest.kernel]       [g] number.isra.1
          3.59%  [guest.kernel]       [g] vsnprintf
          3.52%  sshd                 [u] 0x00000000000441c0
          2.37%  [guest.kernel]       [g] format_decode
          2.36%  [guest.kernel]       [g] memcpy
          2.11%  [guest.kernel]       [g] strnlen

        # perf kvm --guestmount /tmp/guestmount/ record -a sleep 1
        [ perf record: Woken up 1 times to write data ]
        [ perf record: Captured and wrote 0.828 MB perf.data.guest (~36163 samples) ]
    
        # perf kvm --guestmount /tmp/guestmount/ report
        Samples: 4K of event 'cycles', Event count (approx.): 2662750816
          8.67%  [guest/9217]  dd                            [u] 0x0000000000004e90
          6.62%  [guest/9217]  [guest.kernel.kallsyms.9217]  [g] fget_light
          6.17%  [guest/9217]  [guest.kernel.kallsyms.9217]  [g] system_call
          5.97%  [guest/9217]  [guest.kernel.kallsyms.9217]  [g] __srcu_read_lock
          5.53%  [guest/9217]  [guest.kernel.kallsyms.9217]  [g] __srcu_read_unlock
          5.47%  [guest/9217]  [guest.kernel.kallsyms.9217]  [g] __audit_syscall_exit
          5.38%  [guest/9217]  [guest.kernel.kallsyms.9217]  [g] fsnotify
          5.32%  [guest/9217]  [guest.kernel.kallsyms.9217]  [g] system_call_after_swapgs
          4.45%  [guest/9217]  libc-2.17.so                  [u] __GI___libc_write
          4.15%  [guest/9217]  [guest.kernel.kallsyms.9217]  [g] sys_write
          3.97%  [guest/9217]  [guest.kernel.kallsyms.9217]  [g] vfs_read
          3.78%  [guest/9217]  libc-2.17.so                  [u] __GI___libc_read


Dongsheng Yang (4):
  perf tools: Add support of guest in synthesize_threads.
  perf tools: Add support for PERF_RECORD_MISC_GUEST_USER in
    thread__find_addr_map().
  perf tools: Add support of user space symbols for guest in perf kvm
    top.
  perf tools: Add support of user space symbols for guest in perf kvm
    record.

 tools/perf/builtin-record.c | 10 ++++++++++
 tools/perf/builtin-top.c    | 15 ++++++++++-----
 tools/perf/util/event.c     | 44 ++++++++++++++++++++++++++++++--------------
 3 files changed, 50 insertions(+), 19 deletions(-)

-- 
1.8.2.1

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