summaryrefslogtreecommitdiff
path: root/tools/perf/Documentation/perf-record.txt
diff options
context:
space:
mode:
authorIngo Molnar <mingo@kernel.org>2015-01-28 17:48:59 +0300
committerIngo Molnar <mingo@kernel.org>2015-01-28 17:48:59 +0300
commitb3890e4704594fa23abe1395d1fafc97d3214be8 (patch)
tree23e2659713e01779e8854363eb7d1fac49683d32 /tools/perf/Documentation/perf-record.txt
parent29bf4dbc9841366577ba44175b00c543ad1712d6 (diff)
parent2a2662bf88e693d477ef08351d03934f7bc0b51c (diff)
downloadlinux-b3890e4704594fa23abe1395d1fafc97d3214be8.tar.xz
Merge branch 'perf/hw_breakpoints' into perf/core
The new hw_breakpoint bits are now ready for v3.20, merge them into the main branch, to avoid conflicts. Conflicts: tools/perf/Documentation/perf-record.txt Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'tools/perf/Documentation/perf-record.txt')
-rw-r--r--tools/perf/Documentation/perf-record.txt7
1 files changed, 5 insertions, 2 deletions
diff --git a/tools/perf/Documentation/perf-record.txt b/tools/perf/Documentation/perf-record.txt
index 7d8df2e5edd8..31e977459c51 100644
--- a/tools/perf/Documentation/perf-record.txt
+++ b/tools/perf/Documentation/perf-record.txt
@@ -45,12 +45,15 @@ OPTIONS
param1 and param2 are defined as formats for the PMU in:
/sys/bus/event_sources/devices/<pmu>/format/*
- - a hardware breakpoint event in the form of '\mem:addr[:access]'
+ - a hardware breakpoint event in the form of '\mem:addr[/len][:access]'
where addr is the address in memory you want to break in.
Access is the memory access type (read, write, execute) it can
- be passed as follows: '\mem:addr[:[r][w][x]]'.
+ be passed as follows: '\mem:addr[:[r][w][x]]'. len is the range,
+ number of bytes from specified addr, which the breakpoint will cover.
If you want to profile read-write accesses in 0x1000, just set
'mem:0x1000:rw'.
+ If you want to profile write accesses in [0x1000~1008), just set
+ 'mem:0x1000/8:w'.
--filter=<filter>::
Event filter.