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PERF-LIST(1)                      perf Manual                     PERF-LIST(1)



NAME
       perf-list - List all symbolic event types

SYNOPSIS
       perf list [hw|sw|cache|tracepoint|pmu|event_glob]

DESCRIPTION
       This command displays the symbolic event types which can be selected in the various perf commands with the -e
       option.

EVENT MODIFIERS
       Events can optionally have a modifer by appending a colon and one or more modifiers. Modifiers allow the user
       to restrict the events to be counted. The following modifiers exist:

           u - user-space counting
           k - kernel counting
           h - hypervisor counting
           G - guest counting (in KVM guests)
           H - host counting (not in KVM guests)
           p - precise level
           S - read sample value (PERF_SAMPLE_READ)
           D - pin the event to the PMU

       The p modifier can be used for specifying how precise the instruction address should be. The p modifier can be
       specified multiple times:

           0 - SAMPLE_IP can have arbitrary skid
           1 - SAMPLE_IP must have constant skid
           2 - SAMPLE_IP requested to have 0 skid
           3 - SAMPLE_IP must have 0 skid

       For Intel systems precise event sampling is implemented with PEBS which supports up to precise-level 2.

       On AMD systems it is implemented using IBS (up to precise-level 2). The precise modifier works with event types
       0x76 (cpu-cycles, CPU clocks not halted) and 0xC1 (micro-ops retired). Both events map to IBS execution
       sampling (IBS op) with the IBS Op Counter Control bit (IbsOpCntCtl) set respectively (see AMD64 Architecture
       Programmer's Manual Volume 2: System Programming, 13.3 Instruction-Based Sampling). Examples to use IBS:

           perf record -a -e cpu-cycles:p ...    # use ibs op counting cycles
           perf record -a -e r076:p ...          # same as -e cpu-cycles:p
           perf record -a -e r0C1:p ...          # use ibs op counting micro-ops

RAW HARDWARE EVENT DESCRIPTOR
       Even when an event is not available in a symbolic form within perf right now, it can be encoded in a per
       processor specific way.

       For instance For x86 CPUs NNN represents the raw register encoding with the layout of IA32_PERFEVTSELx MSRs
       (see [Intel(R) 64 and IA-32 Architectures Software Developer's Manual Volume 3B: System Programming Guide] Figure
       30-1 Layout of IA32_PERFEVTSELx MSRs) or AMD's PerfEvtSeln (see [AMD64 Architecture Programmer's Manual Volume
       2: System Programming], Page 344, Figure 13-7 Performance Event-Select Register (PerfEvtSeln)).

       Note: Only the following bit fields can be set in x86 counter registers: event, umask, edge, inv, cmask. Esp.
       guest/host only and OS/user mode flags must be setup using EVENT MODIFIERS.

       Example:

       If the Intel docs for a QM720 Core i7 describe an event as:

           Event  Umask  Event Mask
           Num.   Value  Mnemonic    Description                        Comment

           A8H      01H  LSD.UOPS    Counts the number of micro-ops     Use cmask=1 and
                                     delivered by loop stream detector  invert to count
                                                                        cycles

       raw encoding of 0x1A8 can be used:

           perf stat -e r1a8 -a sleep 1
           perf record -e r1a8 ...

       You should refer to the processor specific documentation for getting these details. Some of them are referenced
       in the SEE ALSO section below.

OPTIONS
       Without options all known events will be listed.

       To limit the list use:

        1.  hw or hardware to list hardware events such as cache-misses, etc.

        2.  sw or software to list software events such as context switches, etc.

        3.  cache or hwcache to list hardware cache events such as L1-dcache-loads, etc.

        4.  tracepoint to list all tracepoint events, alternatively use subsys_glob:event_glob to filter by tracepoint
           subsystems such as sched, block, etc.

        5.  pmu to print the kernel supplied PMU events.

        6. If none of the above is matched, it will apply the supplied glob to all events, printing the ones that
           match.

       One or more types can be used at the same time, listing the events for the types specified.

SEE ALSO
       perf-stat(1), perf-top(1), perf-record(1), Intel(R(R) 64 and IA-32 Architectures Software Developer's Manual Volume
       3B: System Programming Guide[1], AMD64 Architecture Programmer's Manual Volume 2: System Programming[2]

NOTES
        1. Intel(R) 64 and IA-32 Architectures Software Developer's Manual Volume 3B: System Programming Guide
           http://www.intel.com/Assets/PDF/manual/253669.pdf

        2. AMD64 Architecture Programmer's Manual Volume 2: System Programming
           http://support.amd.com/us/Processor_TechDocs/24593_APM_v2.pdf



perf                              06/22/2017                      PERF-LIST(1)