linux-kernel - [PATCH v6 5/5] perf, tools, script: Support total cycles count

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Date:   Thu, 20 Sep 2018 11:05:40 -0700
From:   Andi Kleen <andi@...stfloor.org>
To:     acme@...nel.org
Cc:     jolsa@...nel.org, linux-kernel@...r.kernel.org,
        Andi Kleen <ak@...ux.intel.com>
Subject: [PATCH v6 5/5] perf, tools, script: Support total cycles count

From: Andi Kleen <ak@...ux.intel.com>

For perf script brstackinsn also print a running cycles count.
This makes it easier to calculate cycle deltas for code sections
measured with LBRs.

% perf record -b -a sleep 1
% perf script -F +brstackinsn
...
        _dl_sysdep_start+330:
        00007eff9f20583a        insn: 75 c4                     # PRED 24 cycles [24]
        00007eff9f205800        insn: 48 83 e8 03
        00007eff9f205804        insn: 48 83 f8 1e
        00007eff9f205808        insn: 77 26
        00007eff9f20580a        insn: 48 63 04 81
        00007eff9f20580e        insn: 48 01 c8
        00007eff9f205811        insn: ff e0                     # MISPRED 31 cycles [7] 0.71 IPC
        00007eff9f2059c0        insn: 44 8b 62 08
        00007eff9f2059c4        insn: e9 67 fe ff ff            # PRED 55 cycles [24] 0.04 IPC
        00007eff9f205830        insn: 48 83 c2 10
        00007eff9f205834        insn: 48 8b 02
        00007eff9f205837        insn: 48 85 c0
        00007eff9f20583a        insn: 75 c4                     # PRED 68 cycles [13] 0.23 IPC

Signed-off-by: Andi Kleen <ak@...ux.intel.com>

---

v2: reflow line
---
 tools/perf/builtin-script.c | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
index 6232658c6f31..53dc27e63d98 100644
--- a/tools/perf/builtin-script.c
+++ b/tools/perf/builtin-script.c
@@ -913,7 +913,7 @@ static int grab_bb(u8 *buffer, u64 start, u64 end,
 
 static int ip__fprintf_jump(uint64_t ip, struct branch_entry *en,
 			    struct perf_insn *x, u8 *inbuf, int len,
-			    int insn, FILE *fp)
+			    int insn, FILE *fp, int *total_cycles)
 {
 	int printed = fprintf(fp, "\t%016" PRIx64 "\t%-30s\t#%s%s%s%s", ip,
 			      dump_insn(x, ip, inbuf, len, NULL),
@@ -922,7 +922,8 @@ static int ip__fprintf_jump(uint64_t ip, struct branch_entry *en,
 			      en->flags.in_tx ? " INTX" : "",
 			      en->flags.abort ? " ABORT" : "");
 	if (en->flags.cycles) {
-		printed += fprintf(fp, " %d cycles", en->flags.cycles);
+		*total_cycles += en->flags.cycles;
+		printed += fprintf(fp, " %d cycles [%d]", *total_cycles, en->flags.cycles);
 		if (insn)
 			printed += fprintf(fp, " %.2f IPC", (float)insn / en->flags.cycles);
 	}
@@ -979,6 +980,7 @@ static int perf_sample__fprintf_brstackinsn(struct perf_sample *sample,
 	u8 buffer[MAXBB];
 	unsigned off;
 	struct symbol *lastsym = NULL;
+	int total_cycles = 0;
 
 	if (!(br && br->nr))
 		return 0;
@@ -999,7 +1001,7 @@ static int perf_sample__fprintf_brstackinsn(struct perf_sample *sample,
 		printed += ip__fprintf_sym(br->entries[nr - 1].from, thread,
 					   x.cpumode, x.cpu, &lastsym, attr, fp);
 		printed += ip__fprintf_jump(br->entries[nr - 1].from, &br->entries[nr - 1],
-					    &x, buffer, len, 0, fp);
+					    &x, buffer, len, 0, fp, &total_cycles);
 	}
 
 	/* Print all blocks */
@@ -1027,7 +1029,8 @@ static int perf_sample__fprintf_brstackinsn(struct perf_sample *sample,
 
 			printed += ip__fprintf_sym(ip, thread, x.cpumode, x.cpu, &lastsym, attr, fp);
 			if (ip == end) {
-				printed += ip__fprintf_jump(ip, &br->entries[i], &x, buffer + off, len - off, insn, fp);
+				printed += ip__fprintf_jump(ip, &br->entries[i], &x, buffer + off, len - off, insn, fp,
+							    &total_cycles);
 				break;
 			} else {
 				printed += fprintf(fp, "\t%016" PRIx64 "\t%s\n", ip,
-- 
2.17.1