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Message-ID: <20190223120500.cltyzcb6ugun4fyw@studium.uni-erlangen.de>
Date: Sat, 23 Feb 2019 13:05:38 +0100
From: Jonas Rabenstein <jonas.rabenstein@...dium.uni-erlangen.de>
To: Namhyung Kim <namhyung@...nel.org>
Cc: Jonas Rabenstein <jonas.rabenstein@...dium.uni-erlangen.de>,
linux-perf-users <linux-perf-users@...r.kernel.org>,
Adrian Hunter <adrian.hunter@...el.com>,
Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
Andi Kleen <ak@...ux.intel.com>,
Arnaldo Carvalho de Melo <acme@...nel.org>,
David Miller <davem@...emloft.net>,
Eric Saint-Etienne <eric.saint.etienne@...cle.com>,
Ingo Molnar <mingo@...hat.com>, Jiri Olsa <jolsa@...hat.com>,
Kim Phillips <kim.phillips@....com>,
Konstantin Khlebnikov <khlebnikov@...dex-team.ru>,
Milian Wolff <milian.wolff@...b.com>,
Peter Zijlstra <peterz@...radead.org>,
Rob Gardner <rob.gardner@...cle.com>,
Sandipan Das <sandipan@...ux.ibm.com>,
linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 3/3] perf machine: add inline symbols to callchains
On Sat, Feb 23, 2019 at 01:21:34PM +0900, Namhyung Kim wrote:
> Hello,
>
> On Fri, Feb 22, 2019 at 1:07 AM Jonas Rabenstein
> <jonas.rabenstein@...dium.uni-erlangen.de> wrote:
> >
> > Use map__inlines to resolve inlined functions for every entry with
> > an symbol that should be added to a callchain.
> >
> > Signed-off-by: Jonas Rabenstein <jonas.rabenstein@...dium.uni-erlangen.de>
> > ---
> > tools/perf/util/machine.c | 115 ++++++++++++++++++++++++++++----------
> > 1 file changed, 87 insertions(+), 28 deletions(-)
> >
> > diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c
> > index dce29c21e4ea..070d074482b4 100644
> > --- a/tools/perf/util/machine.c
> > +++ b/tools/perf/util/machine.c
> > @@ -1908,6 +1908,91 @@ struct iterations {
> > u64 cycles;
> > };
> >
> > +static int __add_callchain_location(struct callchain_cursor *cursor,
> > + struct symbol **parent,
> > + struct addr_location *root_al,
> > + u64 addr, struct addr_location *al,
> > + bool branch, struct branch_flags *flags,
> > + u64 branch_from, struct iterations *iter)
> > +{
> > + int nr_loop_iter = 0;
> > + u64 iter_cycles = 0;
> > +
> > + if (symbol_conf.hide_unresolved && al->sym == NULL)
> > + return 0;
> > +
> > + if (al->sym) {
> > + if (perf_hpp_list.parent && !*parent &&
> > + symbol__match_regex(al->sym, &parent_regex))
> > + *parent = al->sym;
> > + else if (have_ignore_callees && root_al &&
> > + symbol__match_regex(al->sym, &ignore_callees_regex)) {
> > + /* Treat this symbol as the root,
> > + forgetting its callees. */
> > + *root_al = *al;
> > + callchain_cursor_reset(cursor);
> > + }
> > + }
> > +
> > + if (iter) {
> > + nr_loop_iter = iter->nr_loop_iter;
> > + iter_cycles = iter->cycles;
> > + }
> > + return callchain_cursor_append(cursor, addr, al->map, al->sym, branch,
> > + flags, nr_loop_iter, iter_cycles,
> > + branch_from, al->srcline);
> > +}
> > +
> > +static int __add_callchain_ip(struct callchain_cursor *cursor, u64 ip,
> > + struct addr_location *al, bool branch,
> > + struct branch_flags *flags, u64 branch_from,
> > + struct iterations *iter, struct symbol **parent,
> > + struct addr_location *root_al)
> > +{
> > + struct inline_node *inline_node;
> > + struct inline_list *inline_list;
> > + const char *srcline;
> > + struct symbol *symbol;
> > + int err = 0;
> > +
> > + al->srcline = callchain_srcline(al->map, al->sym, al->addr);
> > + if (callchain_param.order == ORDER_CALLER)
> > + err = __add_callchain_location(cursor, parent, root_al, ip, al,
> > + branch, flags, branch_from, iter);
> > + if (err || !al->map || !al->sym)
> > + goto no_inline;
> > +
> > + inline_node = map__inlines(al->map, ip, al->sym);
> > + if (!inline_node || list_empty(&inline_node->val))
> > + goto no_inline;
> > +
> > + symbol = al->sym;
> > + srcline = al->srcline;
> > + list_for_each_entry(inline_list, &inline_node->val, list) {
> > + if (inline_list->symbol == symbol)
> > + continue;
> > + al->sym = inline_list->symbol;
> > + al->srcline = inline_list->srcline;
> > + err = __add_callchain_location(cursor, parent, root_al, ip,
> > + al, branch, flags,
> > + branch_from, iter);
> > + if (err)
> > + break;
> > + }
>
> Does this loop do the job both for ORDER_CALLER and ORDER_CALLEE?
The list of inline symbols is already build in he correct order
depending on callchain_param.order (see util/srcline.c:37). As far as I
could see, perf-report in tui mode uses ORDER_CALLER and perf-script
uses ORDER_CALLEE and both show me a correct order (:
>
> Thanks,
> Namhyung
>
>
> > +
> > + if (callchain_param.order == ORDER_CALLEE) {
> > + al->srcline = srcline;
> > + al->sym = symbol;
> > + }
> > +
> > +no_inline:
> > + if (!err && callchain_param.order == ORDER_CALLEE)
> > + err = __add_callchain_location(cursor, parent, root_al, ip, al,
> > + branch, flags, branch_from, iter);
> > + return err;
> > +}
> > +
> > +
> > static int add_callchain_ip(struct thread *thread,
> > struct callchain_cursor *cursor,
> > struct symbol **parent,
> > @@ -1920,9 +2005,6 @@ static int add_callchain_ip(struct thread *thread,
> > u64 branch_from)
> > {
> > struct addr_location al;
> > - int nr_loop_iter = 0;
> > - u64 iter_cycles = 0;
> > - const char *srcline = NULL;
> >
> > al.filtered = 0;
> > al.sym = NULL;
> > @@ -1955,31 +2037,8 @@ static int add_callchain_ip(struct thread *thread,
> > thread__find_symbol(thread, *cpumode, ip, &al);
> > }
> >
> > - if (al.sym != NULL) {
> > - if (perf_hpp_list.parent && !*parent &&
> > - symbol__match_regex(al.sym, &parent_regex))
> > - *parent = al.sym;
> > - else if (have_ignore_callees && root_al &&
> > - symbol__match_regex(al.sym, &ignore_callees_regex)) {
> > - /* Treat this symbol as the root,
> > - forgetting its callees. */
> > - *root_al = al;
> > - callchain_cursor_reset(cursor);
> > - }
> > - }
> > -
> > - if (symbol_conf.hide_unresolved && al.sym == NULL)
> > - return 0;
> > -
> > - if (iter) {
> > - nr_loop_iter = iter->nr_loop_iter;
> > - iter_cycles = iter->cycles;
> > - }
> > -
> > - srcline = callchain_srcline(al.map, al.sym, al.addr);
> > - return callchain_cursor_append(cursor, ip, al.map, al.sym,
> > - branch, flags, nr_loop_iter,
> > - iter_cycles, branch_from, srcline);
> > + return __add_callchain_ip(cursor, ip, &al, branch, flags, branch_from,
> > + iter, parent, root_al);
> > }
> >
> > struct branch_info *sample__resolve_bstack(struct perf_sample *sample,
> > --
> > 2.19.2
> >
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