[PATCH 15/35] perf script: Add machine_pid and vcpu

Adrian Hunter
2022-07-11T10:12:06Z

Add fields machine_pid and vcpu. These are displayed only if machine_pid is
non-zero.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
---
tools/perf/Documentation/perf-script.txt | 7 ++++++-
tools/perf/builtin-script.c | 11 +++++++++++
2 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/tools/perf/Documentation/perf-script.txt b/tools/perf/Documentation/perf-script.txt
index e250ff5566cf..c09cc44e50ee 100644
--- a/tools/perf/Documentation/perf-script.txt
+++ b/tools/perf/Documentation/perf-script.txt
@@ -133,7 +133,8 @@ OPTIONS
comm, tid, pid, time, cpu, event, trace, ip, sym, dso, addr, symoff,
srcline, period, iregs, uregs, brstack, brstacksym, flags, bpf-output,
brstackinsn, brstackinsnlen, brstackoff, callindent, insn, insnlen, synth,
- phys_addr, metric, misc, srccode, ipc, data_page_size, code_page_size, ins_lat.
+ phys_addr, metric, misc, srccode, ipc, data_page_size, code_page_size, ins_lat,
+ machine_pid, vcpu.
Field list can be prepended with the type, trace, sw or hw,
to indicate to which event type the field list applies.
e.g., -F sw:comm,tid,time,ip,sym and -F trace:time,cpu,trace
@@ -226,6 +227,10 @@ OPTIONS
The ipc (instructions per cycle) field is synthesized and may have a value when
Instruction Trace decoding.

+ The machine_pid and vcpu fields are derived from data resulting from using
+ perf insert to insert a perf.data file recorded inside a virtual machine into
+ a perf.data file recorded on the host at the same time.
+
Finally, a user may not set fields to none for all event types.
i.e., -F "" is not allowed.

diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
index 4b00a50faf00..ac19fee62d8e 100644
--- a/tools/perf/builtin-script.c
+++ b/tools/perf/builtin-script.c
@@ -125,6 +125,8 @@ enum perf_output_field {
PERF_OUTPUT_CODE_PAGE_SIZE = 1ULL << 34,
PERF_OUTPUT_INS_LAT = 1ULL << 35,
PERF_OUTPUT_BRSTACKINSNLEN = 1ULL << 36,
+ PERF_OUTPUT_MACHINE_PID = 1ULL << 37,
+ PERF_OUTPUT_VCPU = 1ULL << 38,
};

struct perf_script {
@@ -193,6 +195,8 @@ struct output_option {
{.str = "code_page_size", .field = PERF_OUTPUT_CODE_PAGE_SIZE},
{.str = "ins_lat", .field = PERF_OUTPUT_INS_LAT},
{.str = "brstackinsnlen", .field = PERF_OUTPUT_BRSTACKINSNLEN},
+ {.str = "machine_pid", .field = PERF_OUTPUT_MACHINE_PID},
+ {.str = "vcpu", .field = PERF_OUTPUT_VCPU},
};

enum {
@@ -746,6 +750,13 @@ static int perf_sample__fprintf_start(struct perf_script *script,
int printed = 0;
char tstr[128];

+ if (PRINT_FIELD(MACHINE_PID) && sample->machine_pid)
+ printed += fprintf(fp, "VM:%5d ", sample->machine_pid);
+
+ /* Print VCPU only for guest events i.e. with machine_pid */
+ if (PRINT_FIELD(VCPU) && sample->machine_pid)
+ printed += fprintf(fp, "VCPU:%03d ", sample->vcpu);
+
if (PRINT_FIELD(COMM)) {
const char *comm = thread ? thread__comm_str(thread) : ":-1";

--
2.25.1