-c::
--coalesce::
- Specify sorintg fields for single cacheline display.
+ Specify sorting fields for single cacheline display.
Following fields are available: tid,pid,iaddr,dso
(see COALESCE)
-d::
--display::
- Siwtch to HITM type (rmt, lcl) to display and sort on. Total HITMs as default.
+ Switch to HITM type (rmt, lcl) to display and sort on. Total HITMs as default.
C2C RECORD
----------
the libunwind or libdw library) should be used instead.
Using the "lbr" method doesn't require any compiler options. It
will produce call graphs from the hardware LBR registers. The
- main limition is that it is only available on new Intel
+ main limitation is that it is only available on new Intel
platforms, such as Haswell. It can only get user call chain. It
doesn't work with branch stack sampling at the same time.
--parent=<regex>::
A regex filter to identify parent. The parent is a caller of this
function and searched through the callchain, thus it requires callchain
- information recorded. The pattern is in the exteneded regex format and
+ information recorded. The pattern is in the extended regex format and
defaults to "\^sys_|^do_page_fault", see '--sort parent'.
-x::
-g::
--call-graph=<print_type,threshold[,print_limit],order,sort_key[,branch],value>::
Display call chains using type, min percent threshold, print limit,
- call order, sort key, optional branch and value. Note that ordering of
- parameters is not fixed so any parement can be given in an arbitraty order.
+ call order, sort key, optional branch and value. Note that ordering
+ is not fixed so any parameter can be given in an arbitrary order.
One exception is the print_limit which should be preceded by threshold.
print_type can be either:
by an ID. This can be either through the PERF_SAMPLE_ID or the
PERF_SAMPLE_IDENTIFIER header. The PERF_SAMPLE_IDENTIFIER header is
at a fixed offset from the event header, which allows reliable
-parsing of the header. Relying on ID may be ambigious.
+parsing of the header. Relying on ID may be ambiguous.
IDENTIFIER is only supported by newer Linux kernels.
Perf record specific events:
uint64_t id[];
};
- PERF_RECORD_HEADER_EVENT_TYPE = 65, /* depreceated */
+ PERF_RECORD_HEADER_EVENT_TYPE = 65, /* deprecated */
#define MAX_EVENT_NAME 64
For tracepoint events, try: perf report -s trace_fields
To record callchains for each sample: perf record -g
To record every process run by a user: perf record -u <user>
-Skip collecing build-id when recording: perf record -B
+Skip collecting build-id when recording: perf record -B
To change sampling frequency to 100 Hz: perf record -F 100
See assembly instructions with percentage: perf annotate <symbol>
If you prefer Intel style assembly, try: perf annotate -M intel
enum perf_user_event_type { /* above any possible kernel type */
PERF_RECORD_USER_TYPE_START = 64,
PERF_RECORD_HEADER_ATTR = 64,
- PERF_RECORD_HEADER_EVENT_TYPE = 65, /* depreceated */
+ PERF_RECORD_HEADER_EVENT_TYPE = 65, /* deprecated */
PERF_RECORD_HEADER_TRACING_DATA = 66,
PERF_RECORD_HEADER_BUILD_ID = 67,
PERF_RECORD_FINISHED_ROUND = 68,