event filtering with trace-cmd

[Arend van Spriel]

Hi Steven

I wanted to filter my debug events getting only one specific level. So I 
followed the instruction found online, but I get a parse error.

Running on 3.10-rc1 using trace-cmd 1.0.3. Should I upgrade?

Regards,
Arend
----8<-----------------------------------------------------------------
events/brcmfmac/brcmf_dbg# cat format
name: brcmf_dbg
ID: 1133
format: 

        field:unsigned short common_type;       offset:0;       size:2; 
signed:0;
        field:unsigned char common_flags;       offset:2;       size:1; 
signed:0;
        field:unsigned char common_preempt_count;       offset:3; 
 size:1; signed:0;
        field:int common_pid;   offset:4;       size:4; signed:1;

        field:u32 level;        offset:8;       size:4; signed:0;
        field:__data_loc char[] func;   offset:12;      size:4; signed:1;
        field:__data_loc char[] msg;    offset:16;      size:4; signed:1;


print fmt: "%s: %s", __get_str(func), __get_str(msg)

# sudo trace-cmd record -e brcmfmac:brcmf_dbg -f 'level & 0x40000'
disable all
enable brcmfmac:brcmf_dbg
path = /sys/kernel/debug/tracing/events/brcmfmac/brcmf_dbg/enable
(level & 0x40000)
^
parse_error: Invalid operator

trace-cmd: Invalid argument
  Failed filter of 
/sys/kernel/debug/tracing/events/brcmfmac/brcmf_dbg/filter

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