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Subject[PATCH 11/85] perf script: Add output of IPC ratio
Date
From: Adrian Hunter <adrian.hunter@intel.com>

Add field 'ipc' to display instructions-per-cycle.

Example:

perf record -e intel_pt/cyc/u ls
perf script --insn-trace --xed -F+ipc,-dso,-cpu,-tid

ls 2670177.697113434: 7f0dfdbcd090 _start+0x0 mov %rsp, %rdi IPC: 0.00 (1/877)
ls 2670177.697113434: 7f0dfdbcd093 _start+0x3 callq 0x7f0dfdbce030
ls 2670177.697113434: 7f0dfdbce030 _dl_start+0x0 pushq %rbp
ls 2670177.697113434: 7f0dfdbce031 _dl_start+0x1 mov %rsp, %rbp
ls 2670177.697113434: 7f0dfdbce034 _dl_start+0x4 pushq %r15
ls 2670177.697113434: 7f0dfdbce036 _dl_start+0x6 pushq %r14
ls 2670177.697113434: 7f0dfdbce038 _dl_start+0x8 pushq %r13
ls 2670177.697113434: 7f0dfdbce03a _dl_start+0xa pushq %r12
ls 2670177.697113434: 7f0dfdbce03c _dl_start+0xc mov %rdi, %r12
ls 2670177.697113434: 7f0dfdbce03f _dl_start+0xf pushq %rbx
ls 2670177.697113434: 7f0dfdbce040 _dl_start+0x10 sub $0x38, %rsp
ls 2670177.697113434: 7f0dfdbce044 _dl_start+0x14 rdtsc
ls 2670177.697113434: 7f0dfdbce046 _dl_start+0x16 mov %eax, %eax
ls 2670177.697113434: 7f0dfdbce048 _dl_start+0x18 shl $0x20, %rdx
ls 2670177.697113434: 7f0dfdbce04c _dl_start+0x1c or %rax, %rdx
ls 2670177.697114471: 7f0dfdbce04f _dl_start+0x1f movq 0x27e22(%rip), %rax IPC: 0.00 (15/1685)
ls 2670177.697116177: 7f0dfdbce056 _dl_start+0x26 movq %rdx, 0x27683(%rip) IPC: 0.00 (1/881)

Note, the IPC values are low due to page faults at the beginning of
execution. The additional cycles are due to the time to enter the
kernel, not the actual kernel page fault handler.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/r/20190520113728.14389-9-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/Documentation/perf-script.txt | 5 ++++-
tools/perf/builtin-script.c | 23 ++++++++++++++++++++++-
2 files changed, 26 insertions(+), 2 deletions(-)

diff --git a/tools/perf/Documentation/perf-script.txt b/tools/perf/Documentation/perf-script.txt
index af8282782911..c59fd52e9e91 100644
--- a/tools/perf/Documentation/perf-script.txt
+++ b/tools/perf/Documentation/perf-script.txt
@@ -117,7 +117,7 @@ OPTIONS
Comma separated list of fields to print. Options are:
comm, tid, pid, time, cpu, event, trace, ip, sym, dso, addr, symoff,
srcline, period, iregs, uregs, brstack, brstacksym, flags, bpf-output, brstackinsn,
- brstackoff, callindent, insn, insnlen, synth, phys_addr, metric, misc, srccode.
+ brstackoff, callindent, insn, insnlen, synth, phys_addr, metric, misc, srccode, ipc.
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
@@ -203,6 +203,9 @@ OPTIONS
The synth field is used by synthesized events which may be created when
Instruction Trace decoding.

+ The ipc (instructions per cycle) field is synthesized and may have a value when
+ Instruction Trace decoding.
+
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 3a48a2627670..80c722ade852 100644
--- a/tools/perf/builtin-script.c
+++ b/tools/perf/builtin-script.c
@@ -102,6 +102,7 @@ enum perf_output_field {
PERF_OUTPUT_METRIC = 1U << 28,
PERF_OUTPUT_MISC = 1U << 29,
PERF_OUTPUT_SRCCODE = 1U << 30,
+ PERF_OUTPUT_IPC = 1U << 31,
};

struct output_option {
@@ -139,6 +140,7 @@ struct output_option {
{.str = "metric", .field = PERF_OUTPUT_METRIC},
{.str = "misc", .field = PERF_OUTPUT_MISC},
{.str = "srccode", .field = PERF_OUTPUT_SRCCODE},
+ {.str = "ipc", .field = PERF_OUTPUT_IPC},
};

enum {
@@ -1268,6 +1270,20 @@ static int perf_sample__fprintf_insn(struct perf_sample *sample,
return printed;
}

+static int perf_sample__fprintf_ipc(struct perf_sample *sample,
+ struct perf_event_attr *attr, FILE *fp)
+{
+ unsigned int ipc;
+
+ if (!PRINT_FIELD(IPC) || !sample->cyc_cnt || !sample->insn_cnt)
+ return 0;
+
+ ipc = (sample->insn_cnt * 100) / sample->cyc_cnt;
+
+ return fprintf(fp, " \t IPC: %u.%02u (%" PRIu64 "/%" PRIu64 ") ",
+ ipc / 100, ipc % 100, sample->insn_cnt, sample->cyc_cnt);
+}
+
static int perf_sample__fprintf_bts(struct perf_sample *sample,
struct perf_evsel *evsel,
struct thread *thread,
@@ -1312,6 +1328,8 @@ static int perf_sample__fprintf_bts(struct perf_sample *sample,
printed += perf_sample__fprintf_addr(sample, thread, attr, fp);
}

+ printed += perf_sample__fprintf_ipc(sample, attr, fp);
+
if (print_srcline_last)
printed += map__fprintf_srcline(al->map, al->addr, "\n ", fp);

@@ -1859,6 +1877,9 @@ static void process_event(struct perf_script *script,

if (PRINT_FIELD(PHYS_ADDR))
fprintf(fp, "%16" PRIx64, sample->phys_addr);
+
+ perf_sample__fprintf_ipc(sample, attr, fp);
+
fprintf(fp, "\n");

if (PRINT_FIELD(SRCCODE)) {
@@ -3433,7 +3454,7 @@ int cmd_script(int argc, const char **argv)
"Fields: comm,tid,pid,time,cpu,event,trace,ip,sym,dso,"
"addr,symoff,srcline,period,iregs,uregs,brstack,"
"brstacksym,flags,bpf-output,brstackinsn,brstackoff,"
- "callindent,insn,insnlen,synth,phys_addr,metric,misc",
+ "callindent,insn,insnlen,synth,phys_addr,metric,misc,ipc",
parse_output_fields),
OPT_BOOLEAN('a', "all-cpus", &system_wide,
"system-wide collection from all CPUs"),
--
2.20.1
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