![Joerg Roedel](/assets/img/avatar_default.png)
To restrict a counter to either host or guest mode this patch introduces two new event modifiers: G and H. With G the counter is configured in guest-only mode and with H in host-only mode. Cc: Gleb Natapov <gleb@redhat.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Joerg Roedel <joro@8bytes.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: Gleb Natapov <gleb@redhat.com> Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Link: http://lkml.kernel.org/n/tip-or5aj3rghy9ngyg882z6kln9@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
95 lines
3.3 KiB
Plaintext
95 lines
3.3 KiB
Plaintext
perf-list(1)
|
||
============
|
||
|
||
NAME
|
||
----
|
||
perf-list - List all symbolic event types
|
||
|
||
SYNOPSIS
|
||
--------
|
||
[verse]
|
||
'perf list' [hw|sw|cache|tracepoint|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 when events are
|
||
counted with 'u' for user-space, 'k' for kernel, 'h' for hypervisor.
|
||
Additional modifiers are 'G' for guest counting (in KVM guests) and 'H'
|
||
for host counting (not in KVM guests).
|
||
|
||
The 'p' modifier can be used for specifying how precise the instruction
|
||
address should be. The 'p' modifier is currently only implemented for
|
||
Intel PEBS and 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
|
||
|
||
The PEBS implementation now supports up to 2.
|
||
|
||
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® 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)).
|
||
|
||
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:
|
||
|
||
. 'hw' or 'hardware' to list hardware events such as cache-misses, etc.
|
||
|
||
. 'sw' or 'software' to list software events such as context switches, etc.
|
||
|
||
. 'cache' or 'hwcache' to list hardware cache events such as L1-dcache-loads, etc.
|
||
|
||
. 'tracepoint' to list all tracepoint events, alternatively use
|
||
'subsys_glob:event_glob' to filter by tracepoint subsystems such as sched,
|
||
block, etc.
|
||
|
||
. 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
|
||
--------
|
||
linkperf:perf-stat[1], linkperf:perf-top[1],
|
||
linkperf:perf-record[1],
|
||
http://www.intel.com/Assets/PDF/manual/253669.pdf[Intel® 64 and IA-32 Architectures Software Developer's Manual Volume 3B: System Programming Guide],
|
||
http://support.amd.com/us/Processor_TechDocs/24593.pdf[AMD64 Architecture Programmer’s Manual Volume 2: System Programming]
|