path: root/tools/perf/perf.h
diff options
authorStephane Eranian <>2015-08-31 18:41:12 +0200
committerArnaldo Carvalho de Melo <>2015-08-31 18:01:33 -0300
commitbcc84ec65ad1bd9f777a1fade6f8e5e0c5808fa5 (patch)
treef824e46632026abbbe0f76f109e86b2c09bec18f /tools/perf/perf.h
parentc5e991ee9dff0f8136168ed2d0d1a8cc3620dac4 (diff)
perf record: Add ability to name registers to record
This patch modifies the -I/--int-regs option to enablepassing the name of the registers to sample on interrupt. Registers can be specified by their symbolic names. For instance on x86, --intr-regs=ax,si. The motivation is to reduce the size of the file and the overhead of sampling by only collecting the registers useful to a specific analysis. For instance, for value profiling, sampling only the registers used to passed arguements to functions. With no parameter, the --intr-regs still records all possible registers based on the architecture. To name registers, it is necessary to use the long form of the option, i.e., --intr-regs: $ perf record --intr-regs=si,di,r8,r9 ..... To record any possible registers: $ perf record -I ..... $ perf report --intr-regs ... To display the register, one can use perf report -D To list the available registers: $ perf record --intr-regs=\? available registers: AX BX CX DX SI DI BP SP IP FLAGS CS SS R8 R9 R10 R11 R12 R13 R14 R15 Signed-off-by: Stephane Eranian <> Tested-by: Arnaldo Carvalho de Melo <> Cc: Adrian Hunter <> Cc: Andi Kleen <> Cc: David Ahern <> Cc: Jiri Olsa <> Cc: Kan Liang <> Cc: Namhyung Kim <> Cc: Peter Zijlstra <> Link: Signed-off-by: Arnaldo Carvalho de Melo <>
Diffstat (limited to 'tools/perf/perf.h')
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/perf/perf.h b/tools/perf/perf.h
index cccb4cf575d3..90129accffbe 100644
--- a/tools/perf/perf.h
+++ b/tools/perf/perf.h
@@ -54,7 +54,6 @@ struct record_opts {
bool sample_time_set;
bool callgraph_set;
bool period;
- bool sample_intr_regs;
bool running_time;
bool full_auxtrace;
bool auxtrace_snapshot_mode;
@@ -64,6 +63,7 @@ struct record_opts {
unsigned int auxtrace_mmap_pages;
unsigned int user_freq;
u64 branch_stack;
+ u64 sample_intr_regs;
u64 default_interval;
u64 user_interval;
size_t auxtrace_snapshot_size;