diff options
Diffstat (limited to 'tools/perf/Documentation')
-rw-r--r-- | tools/perf/Documentation/perf-record.txt | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/tools/perf/Documentation/perf-record.txt b/tools/perf/Documentation/perf-record.txt index 0ff23de9e453..fc46c0b40f6e 100644 --- a/tools/perf/Documentation/perf-record.txt +++ b/tools/perf/Documentation/perf-record.txt | |||
@@ -26,11 +26,19 @@ OPTIONS | |||
26 | 26 | ||
27 | -e:: | 27 | -e:: |
28 | --event=:: | 28 | --event=:: |
29 | Select the PMU event. Selection can be a symbolic event name | 29 | Select the PMU event. Selection can be: |
30 | (use 'perf list' to list all events) or a raw PMU | ||
31 | event (eventsel+umask) in the form of rNNN where NNN is a | ||
32 | hexadecimal event descriptor. | ||
33 | 30 | ||
31 | - a symbolic event name (use 'perf list' to list all events) | ||
32 | |||
33 | - a raw PMU event (eventsel+umask) in the form of rNNN where NNN is a | ||
34 | hexadecimal event descriptor. | ||
35 | |||
36 | - a hardware breakpoint event in the form of '\mem:addr[:access]' | ||
37 | where addr is the address in memory you want to break in. | ||
38 | Access is the memory access type (read, write, execute) it can | ||
39 | be passed as follows: '\mem:addr[:[r][w][x]]'. | ||
40 | If you want to profile read-write accesses in 0x1000, just set | ||
41 | 'mem:0x1000:rw'. | ||
34 | -a:: | 42 | -a:: |
35 | System-wide collection. | 43 | System-wide collection. |
36 | 44 | ||