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perf machine: Factor out lbr_callchain_add_lbr_ip() 

Both caller and callee needs to add ip from LBR to callchain.
Factor out lbr_callchain_add_lbr_ip() to improve code readability.

Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Reviewed-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexey Budankov <alexey.budankov@linux.intel.com>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Pavel Gerasimov <pavel.gerasimov@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
Cc: Stephane Eranian <eranian@google.com>
Cc: Vitaly Slobodskoy <vitaly.slobodskoy@intel.com>
Link: http://lore.kernel.org/lkml/20200319202517.23423-9-kan.liang@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Kan Liang 2020-03-19 13:25:08 -07:00 коммит произвёл Arnaldo Carvalho de Melo
Родитель dd3e249a0c
Коммит e2b23483eb
1 изменённых файлов: 73 добавлений и 70 удалений
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143
tools/perf/util/machine.c
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@ -2224,6 +2224,74 @@ static int lbr_callchain_add_kernel_ip(struct thread *thread,
return 0;
}
static int lbr_callchain_add_lbr_ip(struct thread *thread,
struct callchain_cursor *cursor,
struct perf_sample *sample,
struct symbol **parent,
struct addr_location *root_al,
u64 *branch_from,
bool callee)
{
struct branch_stack *lbr_stack = sample->branch_stack;
struct branch_entry *entries = perf_sample__branch_entries(sample);
u8 cpumode = PERF_RECORD_MISC_USER;
int lbr_nr = lbr_stack->nr;
struct branch_flags *flags;
int err, i;
u64 ip;
if (callee) {
/* Add LBR ip from first entries.to */
ip = entries[0].to;
flags = &entries[0].flags;
*branch_from = entries[0].from;
err = add_callchain_ip(thread, cursor, parent,
root_al, &cpumode, ip,
true, flags, NULL,
*branch_from);
if (err)
return err;
/* Add LBR ip from entries.from one by one. */
for (i = 0; i < lbr_nr; i++) {
ip = entries[i].from;
flags = &entries[i].flags;
err = add_callchain_ip(thread, cursor, parent,
root_al, &cpumode, ip,
true, flags, NULL,
*branch_from);
if (err)
return err;
}
return 0;
}
/* Add LBR ip from entries.from one by one. */
for (i = lbr_nr - 1; i >= 0; i--) {
ip = entries[i].from;
flags = &entries[i].flags;
err = add_callchain_ip(thread, cursor, parent,
root_al, &cpumode, ip,
true, flags, NULL,
*branch_from);
if (err)
return err;
}
/* Add LBR ip from first entries.to */
ip = entries[0].to;
flags = &entries[0].flags;
*branch_from = entries[0].from;
err = add_callchain_ip(thread, cursor, parent,
root_al, &cpumode, ip,
true, flags, NULL,
*branch_from);
if (err)
return err;
return 0;
}
/*
* Recolve LBR callstack chain sample
* Return:
@ -2240,14 +2308,7 @@ static int resolve_lbr_callchain_sample(struct thread *thread,
{
struct ip_callchain *chain = sample->callchain;
int chain_nr = min(max_stack, (int)chain->nr), i;
u8 cpumode = PERF_RECORD_MISC_USER;
u64 ip, branch_from = 0;
struct branch_stack *lbr_stack;
struct branch_entry *entries;
int lbr_nr, j, k;
bool branch;
struct branch_flags *flags;
int mix_chain_nr;
u64 branch_from = 0;
int err;
for (i = 0; i < chain_nr; i++) {
@ -2259,21 +2320,6 @@ static int resolve_lbr_callchain_sample(struct thread *thread,
if (i == chain_nr)
return 0;
lbr_stack = sample->branch_stack;
entries = perf_sample__branch_entries(sample);
lbr_nr = lbr_stack->nr;
/*
* LBR callstack can only get user call chain.
* The mix_chain_nr is kernel call chain
* number plus LBR user call chain number.
* i is kernel call chain number,
* 1 is PERF_CONTEXT_USER,
* lbr_nr + 1 is the user call chain number.
* For details, please refer to the comments
* in callchain__printf
*/
mix_chain_nr = i + 1 + lbr_nr + 1;
if (callchain_param.order == ORDER_CALLEE) {
/* Add kernel ip */
err = lbr_callchain_add_kernel_ip(thread, cursor, sample,
@ -2282,57 +2328,14 @@ static int resolve_lbr_callchain_sample(struct thread *thread,
if (err)
goto error;
/* Add LBR ip from first entries.to */
ip = entries[0].to;
branch = true;
flags = &entries[0].flags;
branch_from = entries[0].from;
err = add_callchain_ip(thread, cursor, parent,
root_al, &cpumode, ip,
branch, flags, NULL,
branch_from);
err = lbr_callchain_add_lbr_ip(thread, cursor, sample, parent,
root_al, &branch_from, true);
if (err)
goto error;
/* Add LBR ip from entries.from one by one. */
for (j = i + 2; j < mix_chain_nr; j++) {
k = j - i - 2;
ip = entries[k].from;
branch = true;
flags = &entries[k].flags;
err = add_callchain_ip(thread, cursor, parent,
root_al, &cpumode, ip,
branch, flags, NULL,
branch_from);
if (err)
goto error;
}
} else {
/* Add LBR ip from entries.from one by one. */
for (j = 0; j < lbr_nr; j++) {
k = lbr_nr - j - 1;
ip = entries[k].from;
branch = true;
flags = &entries[k].flags;
err = add_callchain_ip(thread, cursor, parent,
root_al, &cpumode, ip,
branch, flags, NULL,
branch_from);
if (err)
goto error;
}
/* Add LBR ip from first entries.to */
ip = entries[0].to;
branch = true;
flags = &entries[0].flags;
branch_from = entries[0].from;
err = add_callchain_ip(thread, cursor, parent,
root_al, &cpumode, ip,
branch, flags, NULL,
branch_from);
err = lbr_callchain_add_lbr_ip(thread, cursor, sample, parent,
root_al, &branch_from, false);
if (err)
goto error;