diff options
| -rw-r--r-- | tools/perf/Documentation/perf-list.txt | 19 | ||||
| -rw-r--r-- | tools/perf/util/parse-events.c | 3 |
2 files changed, 18 insertions, 4 deletions
diff --git a/tools/perf/Documentation/perf-list.txt b/tools/perf/Documentation/perf-list.txt index ad765e0..43e3dd2 100644 --- a/tools/perf/Documentation/perf-list.txt +++ b/tools/perf/Documentation/perf-list.txt @@ -18,8 +18,16 @@ various perf commands with the -e option. RAW HARDWARE EVENT DESCRIPTOR ----------------------------- Even when an event is not available in a symbolic form within perf right now, -it can be encoded as <UMASK VALUE><EVENT NUM>, for instance, if the Intel docs -describe an event as: +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 @@ -33,6 +41,9 @@ 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 ------- None @@ -40,4 +51,6 @@ None SEE ALSO -------- linkperf:perf-stat[1], linkperf:perf-top[1], -linkperf:perf-record[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] diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c index bc8b7e6..7b24b5d 100644 --- a/tools/perf/util/parse-events.c +++ b/tools/perf/util/parse-events.c @@ -936,7 +936,8 @@ void print_events(void) printf("\n"); printf(" %-42s [%s]\n", - "rNNN (NNN=<UMASK VALUE><EVENT NUM>)", event_type_descriptors[PERF_TYPE_RAW]); + "rNNN (see 'perf list --help' on how to encode it)", + event_type_descriptors[PERF_TYPE_RAW]); printf("\n"); printf(" %-42s [%s]\n", |
