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Subject[PATCH 04/15 V3] perf c2c: Dump raw records, decode data_src bits
Date
From: Arnaldo Carvalho de Melo <acme@redhat.com>

From the c2c prototype:

[root@sandy ~]# perf c2c -r report | head -7
T Status Pid Tid CPU Inst Adrs Virt Data Adrs Phys Data Adrs Cycles Source Decoded Source ObJect:Symbol
--------------------------------------------------------------------------------------------------------------------------------------------
raw input 779 779 7 0xffffffff810865dd 0xffff8803f4d75ec8 0 370 0x68080882 [LOAD,LCL_LLC,MISS,SNP NA] [kernel.kallsyms]:try_to_wake_up
raw input 779 779 7 0xffffffff8107acb3 0xffff8802a5b73158 0 297 0x6a100142 [LOAD,L1,HIT,SNP NONE,LOCKED] [kernel.kallsyms]:up_read
raw input 779 779 7 0x3b7e009814 0x7fff87429ea0 0 925 0x68100142 [LOAD,L1,HIT,SNP NONE] ???:???
raw input 0 0 1 0xffffffff8108bf81 0xffff8803eafebf50 0 172 0x68800842 [LOAD,LCL_LLC,HIT,SNP HITM] [kernel.kallsyms]:update_stats_wait_end
raw input 779 779 7 0x3b7e0097cc 0x7fac94b69068 0 228 0x68100242 [LOAD,LFB,HIT,SNP NONE] ???:???
[root@sandy ~]#

The "Phys Data Adrs" column is not available at this point.

Cc: David Ahern <dsahern@gmail.com>
Cc: Don Zickus <dzickus@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Joe Mario <jmario@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Richard Fowles <rfowles@redhat.com>
Cc: Stephane Eranian <eranian@google.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/builtin-c2c.c | 148 +++++++++++++++++++++++++++++++++++++++--------
1 file changed, 125 insertions(+), 23 deletions(-)

diff --git a/tools/perf/builtin-c2c.c b/tools/perf/builtin-c2c.c
index 2935484..7082913 100644
--- a/tools/perf/builtin-c2c.c
+++ b/tools/perf/builtin-c2c.c
@@ -11,51 +11,148 @@

struct perf_c2c {
struct perf_tool tool;
+ bool raw_records;
};

-static int perf_sample__fprintf(struct perf_sample *sample,
- struct perf_evsel *evsel,
- struct addr_location *al, FILE *fp)
+enum { OP, LVL, SNP, LCK, TLB };
+
+static int perf_c2c__scnprintf_data_src(char *bf, size_t size, uint64_t val)
{
- return fprintf(fp, "%25.25s: %5d %5d 0x%016" PRIx64 " 0x016%" PRIx64 " %5" PRIu64 " 0x%06" PRIx64 " %s:%s\n",
- perf_evsel__name(evsel),
- sample->pid, sample->tid, sample->ip, sample->addr,
- sample->weight, sample->data_src,
- al->map ? (al->map->dso ? al->map->dso->long_name : "???") : "???",
- al->sym ? al->sym->name : "???");
+#define PREFIX "["
+#define SUFFIX "]"
+#define ELLIPSIS "..."
+ static const struct {
+ uint64_t bit;
+ int64_t field;
+ const char *name;
+ } decode_bits[] = {
+ { PERF_MEM_OP_LOAD, OP, "LOAD" },
+ { PERF_MEM_OP_STORE, OP, "STORE" },
+ { PERF_MEM_OP_NA, OP, "OP_NA" },
+ { PERF_MEM_LVL_LFB, LVL, "LFB" },
+ { PERF_MEM_LVL_L1, LVL, "L1" },
+ { PERF_MEM_LVL_L2, LVL, "L2" },
+ { PERF_MEM_LVL_L3, LVL, "LCL_LLC" },
+ { PERF_MEM_LVL_LOC_RAM, LVL, "LCL_RAM" },
+ { PERF_MEM_LVL_REM_RAM1, LVL, "RMT_RAM" },
+ { PERF_MEM_LVL_REM_RAM2, LVL, "RMT_RAM" },
+ { PERF_MEM_LVL_REM_CCE1, LVL, "RMT_LLC" },
+ { PERF_MEM_LVL_REM_CCE2, LVL, "RMT_LLC" },
+ { PERF_MEM_LVL_IO, LVL, "I/O" },
+ { PERF_MEM_LVL_UNC, LVL, "UNCACHED" },
+ { PERF_MEM_LVL_NA, LVL, "N" },
+ { PERF_MEM_LVL_HIT, LVL, "HIT" },
+ { PERF_MEM_LVL_MISS, LVL, "MISS" },
+ { PERF_MEM_SNOOP_NONE, SNP, "SNP NONE" },
+ { PERF_MEM_SNOOP_HIT, SNP, "SNP HIT" },
+ { PERF_MEM_SNOOP_MISS, SNP, "SNP MISS" },
+ { PERF_MEM_SNOOP_HITM, SNP, "SNP HITM" },
+ { PERF_MEM_SNOOP_NA, SNP, "SNP NA" },
+ { PERF_MEM_LOCK_LOCKED, LCK, "LOCKED" },
+ { PERF_MEM_LOCK_NA, LCK, "LOCK_NA" },
+ };
+ union perf_mem_data_src dsrc = { .val = val, };
+ int printed = scnprintf(bf, size, PREFIX);
+ size_t i;
+ bool first_present = true;
+
+ for (i = 0; i < ARRAY_SIZE(decode_bits); i++) {
+ int bitval;
+
+ switch (decode_bits[i].field) {
+ case OP: bitval = decode_bits[i].bit & dsrc.mem_op; break;
+ case LVL: bitval = decode_bits[i].bit & dsrc.mem_lvl; break;
+ case SNP: bitval = decode_bits[i].bit & dsrc.mem_snoop; break;
+ case LCK: bitval = decode_bits[i].bit & dsrc.mem_lock; break;
+ case TLB: bitval = decode_bits[i].bit & dsrc.mem_dtlb; break;
+ default: bitval = 0; break;
+ }
+
+ if (!bitval)
+ continue;
+
+ if (strlen(decode_bits[i].name) + !!i > size - printed - sizeof(SUFFIX)) {
+ sprintf(bf + size - sizeof(SUFFIX) - sizeof(ELLIPSIS) + 1, ELLIPSIS);
+ printed = size - sizeof(SUFFIX);
+ break;
+ }
+
+ printed += scnprintf(bf + printed, size - printed, "%s%s",
+ first_present ? "" : ",", decode_bits[i].name);
+ first_present = false;
+ }
+
+ printed += scnprintf(bf + printed, size - printed, SUFFIX);
+ return printed;
}

-static int perf_c2c__process_load(struct perf_evsel *evsel,
- struct perf_sample *sample,
- struct addr_location *al)
+static int perf_c2c__fprintf_header(FILE *fp)
{
- perf_sample__fprintf(sample, evsel, al, stdout);
- return 0;
+ int printed = fprintf(fp, "%c %-16s %6s %6s %4s %18s %18s %18s %6s %-10s %-60s %s\n",
+ 'T',
+ "Status",
+ "Pid",
+ "Tid",
+ "CPU",
+ "Inst Adrs",
+ "Virt Data Adrs",
+ "Phys Data Adrs",
+ "Cycles",
+ "Source",
+ " Decoded Source",
+ "ObJect:Symbol");
+ return printed + fprintf(fp, "%-*.*s\n", printed, printed, graph_dotted_line);
+}
+
+static int perf_sample__fprintf(struct perf_sample *sample, char tag,
+ const char *reason, struct addr_location *al, FILE *fp)
+{
+ char data_src[61];
+
+ perf_c2c__scnprintf_data_src(data_src, sizeof(data_src), sample->data_src);
+
+ return fprintf(fp, "%c %-16s %6d %6d %4d %#18" PRIx64 " %#18" PRIx64 " %#18" PRIx64 " %6" PRIu64 " %#10" PRIx64 " %-60.60s %s:%s\n",
+ tag,
+ reason ?: "valid record",
+ sample->pid,
+ sample->tid,
+ sample->cpu,
+ sample->ip,
+ sample->addr,
+ 0UL,
+ sample->weight,
+ sample->data_src,
+ data_src,
+ al->map ? (al->map->dso ? al->map->dso->long_name : "???") : "???",
+ al->sym ? al->sym->name : "???");
}

-static int perf_c2c__process_store(struct perf_evsel *evsel,
- struct perf_sample *sample,
- struct addr_location *al)
+static int perf_c2c__process_load_store(struct perf_c2c *c2c,
+ struct perf_sample *sample,
+ struct addr_location *al)
{
- perf_sample__fprintf(sample, evsel, al, stdout);
+ if (c2c->raw_records)
+ perf_sample__fprintf(sample, ' ', "raw input", al, stdout);
+
return 0;
}

static const struct perf_evsel_str_handler handlers[] = {
- { "cpu/mem-loads,ldlat=30/pp", perf_c2c__process_load, },
- { "cpu/mem-stores/pp", perf_c2c__process_store, },
+ { "cpu/mem-loads,ldlat=30/pp", perf_c2c__process_load_store, },
+ { "cpu/mem-stores/pp", perf_c2c__process_load_store, },
};

-typedef int (*sample_handler)(struct perf_evsel *evsel,
+typedef int (*sample_handler)(struct perf_c2c *c2c,
struct perf_sample *sample,
struct addr_location *al);

-static int perf_c2c__process_sample(struct perf_tool *tool __maybe_unused,
+static int perf_c2c__process_sample(struct perf_tool *tool,
union perf_event *event,
struct perf_sample *sample,
struct perf_evsel *evsel,
struct machine *machine)
{
+ struct perf_c2c *c2c = container_of(tool, struct perf_c2c, tool);
struct addr_location al;
int err = 0;

@@ -67,7 +164,7 @@ static int perf_c2c__process_sample(struct perf_tool *tool __maybe_unused,

if (evsel->handler != NULL) {
sample_handler f = evsel->handler;
- err = f(evsel, sample, &al);
+ err = f(c2c, sample, &al);
}

return err;
@@ -111,6 +208,10 @@ out:
static int perf_c2c__report(struct perf_c2c *c2c)
{
setup_pager();
+
+ if (c2c->raw_records)
+ perf_c2c__fprintf_header(stdout);
+
return perf_c2c__read_events(c2c);
}

@@ -161,6 +262,7 @@ int cmd_c2c(int argc, const char **argv, const char *prefix __maybe_unused)
},
};
const struct option c2c_options[] = {
+ OPT_BOOLEAN('r', "raw_records", &c2c.raw_records, "dump raw events"),
OPT_END()
};
const char * const c2c_usage[] = {
--
1.7.11.7


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