diff options
Diffstat (limited to 'tools/perf/Documentation/perf-c2c.txt')
| -rw-r--r-- | tools/perf/Documentation/perf-c2c.txt | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/tools/perf/Documentation/perf-c2c.txt b/tools/perf/Documentation/perf-c2c.txt index 856f0dfb8e5a..40b0f71a2c44 100644 --- a/tools/perf/Documentation/perf-c2c.txt +++ b/tools/perf/Documentation/perf-c2c.txt @@ -54,8 +54,15 @@ RECORD OPTIONS -l:: --ldlat:: - Configure mem-loads latency. Supported on Intel and Arm64 processors - only. Ignored on other archs. + Configure mem-loads latency. Supported on Intel, Arm64 and some AMD + processors. Ignored on other archs. + + On supported AMD processors: + - /sys/bus/event_source/devices/ibs_op/caps/ldlat file contains '1'. + - Supported latency values are 128 to 2048 (both inclusive). + - Latency value which is a multiple of 128 incurs a little less profiling + overhead compared to other values. + - Load latency filtering is disabled by default. -k:: --all-kernel:: @@ -136,6 +143,13 @@ REPORT OPTIONS feature, which causes cacheline sharing to behave like the cacheline size is doubled. +-M:: +--disassembler-style=:: + Set disassembler style for objdump. + +--objdump=<path>:: + Path to objdump binary. + C2C RECORD ---------- The perf c2c record command setup options related to HITM cacheline analysis |