From: Arnaldo Carvalho de Melo <acme@kernel.org>
To: Ingo Molnar <mingo@kernel.org>, Thomas Gleixner <tglx@linutronix.de>
Cc: Jiri Olsa <jolsa@kernel.org>, Namhyung Kim <namhyung@kernel.org>,
Clark Williams <williams@redhat.com>,
linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org,
Adrian Hunter <adrian.hunter@intel.com>,
Arnaldo Carvalho de Melo <acme@redhat.com>,
Andi Kleen <ak@linux.intel.com>, Jiri Olsa <jolsa@redhat.com>
Subject: [PATCH 36/60] perf intel-pt: Add support for synthesizing callchains for regular events
Date: Mon, 20 Apr 2020 08:52:52 -0300 [thread overview]
Message-ID: <20200420115316.18781-37-acme@kernel.org> (raw)
In-Reply-To: <20200420115316.18781-1-acme@kernel.org>
From: Adrian Hunter <adrian.hunter@intel.com>
Currently, callchains can be synthesized only for synthesized events.
Support also synthesizing callchains for regular events.
Example:
# perf record --kcore --aux-sample -e '{intel_pt//,cycles}' -c 10000 uname
Linux
[ perf record: Woken up 3 times to write data ]
[ perf record: Captured and wrote 0.532 MB perf.data ]
# perf script --itrace=Ge | head -20
uname 4864 2419025.358181: 10000 cycles:
ffffffffbba56965 apparmor_bprm_committing_creds+0x35 ([kernel.kallsyms])
ffffffffbc400cd5 __indirect_thunk_start+0x5 ([kernel.kallsyms])
ffffffffbba07422 security_bprm_committing_creds+0x22 ([kernel.kallsyms])
ffffffffbb89805d install_exec_creds+0xd ([kernel.kallsyms])
ffffffffbb90d9ac load_elf_binary+0x3ac ([kernel.kallsyms])
uname 4864 2419025.358185: 10000 cycles:
ffffffffbba56db0 apparmor_bprm_committed_creds+0x20 ([kernel.kallsyms])
ffffffffbc400cd5 __indirect_thunk_start+0x5 ([kernel.kallsyms])
ffffffffbba07452 security_bprm_committed_creds+0x22 ([kernel.kallsyms])
ffffffffbb89809a install_exec_creds+0x4a ([kernel.kallsyms])
ffffffffbb90d9ac load_elf_binary+0x3ac ([kernel.kallsyms])
uname 4864 2419025.358189: 10000 cycles:
ffffffffbb86fdf6 vma_adjust_trans_huge+0x6 ([kernel.kallsyms])
ffffffffbb821660 __vma_adjust+0x160 ([kernel.kallsyms])
ffffffffbb897be7 shift_arg_pages+0x97 ([kernel.kallsyms])
ffffffffbb897ed9 setup_arg_pages+0x1e9 ([kernel.kallsyms])
ffffffffbb90d9f2 load_elf_binary+0x3f2 ([kernel.kallsyms])
Committer testing:
# perf record --kcore --aux-sample -e '{intel_pt//,cycles}' -c 10000 uname
Linux
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.233 MB perf.data ]
#
Then, before this patch:
# perf script --itrace=Ge | head -20
uname 28642 168664.856384: 10000 cycles: ffffffff9810aeaa commit_creds+0x2a ([kernel.kallsyms])
uname 28642 168664.856388: 10000 cycles: ffffffff982a24f1 mprotect_fixup+0x151 ([kernel.kallsyms])
uname 28642 168664.856392: 10000 cycles: ffffffff982a385b move_page_tables+0xbcb ([kernel.kallsyms])
uname 28642 168664.856396: 10000 cycles: ffffffff982fd4ec __mod_memcg_state+0x1c ([kernel.kallsyms])
uname 28642 168664.856400: 10000 cycles: ffffffff9829fddd do_mmap+0xfd ([kernel.kallsyms])
uname 28642 168664.856404: 10000 cycles: ffffffff9829c879 __vma_adjust+0x479 ([kernel.kallsyms])
uname 28642 168664.856408: 10000 cycles: ffffffff98238e94 __perf_addr_filters_adjust+0x34 ([kernel.kallsyms])
uname 28642 168664.856412: 10000 cycles: ffffffff98a38e0b down_write+0x1b ([kernel.kallsyms])
uname 28642 168664.856416: 10000 cycles: ffffffff983006a0 memcg_kmem_get_cache+0x0 ([kernel.kallsyms])
uname 28642 168664.856421: 10000 cycles: ffffffff98396eaf load_elf_binary+0x92f ([kernel.kallsyms])
uname 28642 168664.856425: 10000 cycles: ffffffff982e0222 kfree+0x62 ([kernel.kallsyms])
uname 28642 168664.856428: 10000 cycles: ffffffff9846dfd4 file_has_perm+0x54 ([kernel.kallsyms])
uname 28642 168664.856433: 10000 cycles: ffffffff98288911 vma_interval_tree_insert+0x51 ([kernel.kallsyms])
uname 28642 168664.856437: 10000 cycles: ffffffff9823e577 perf_event_mmap_output+0x27 ([kernel.kallsyms])
uname 28642 168664.856441: 10000 cycles: ffffffff98a26fa0 xas_load+0x40 ([kernel.kallsyms])
uname 28642 168664.856445: 10000 cycles: ffffffff98004f30 arch_setup_additional_pages+0x0 ([kernel.kallsyms])
uname 28642 168664.856448: 10000 cycles: ffffffff98a297c0 copy_user_generic_unrolled+0xa0 ([kernel.kallsyms])
uname 28642 168664.856452: 10000 cycles: ffffffff9853a87a strnlen_user+0x10a ([kernel.kallsyms])
uname 28642 168664.856456: 10000 cycles: ffffffff986638a7 randomize_page+0x27 ([kernel.kallsyms])
uname 28642 168664.856460: 10000 cycles: ffffffff98a3b645 _raw_spin_lock+0x5 ([kernel.kallsyms])
#
And after:
# perf script --itrace=Ge | head -20
uname 28642 168664.856384: 10000 cycles:
ffffffff9810aeaa commit_creds+0x2a ([kernel.kallsyms])
ffffffff9831fe87 install_exec_creds+0x17 ([kernel.kallsyms])
ffffffff983968d9 load_elf_binary+0x359 ([kernel.kallsyms])
ffffffff98e00c45 __x86_indirect_thunk_rax+0x5 ([kernel.kallsyms])
ffffffff98e00c45 __x86_indirect_thunk_rax+0x5 ([kernel.kallsyms])
uname 28642 168664.856388: 10000 cycles:
ffffffff982a24f1 mprotect_fixup+0x151 ([kernel.kallsyms])
ffffffff9831fa83 setup_arg_pages+0x123 ([kernel.kallsyms])
ffffffff9839691f load_elf_binary+0x39f ([kernel.kallsyms])
ffffffff98e00c45 __x86_indirect_thunk_rax+0x5 ([kernel.kallsyms])
ffffffff98e00c45 __x86_indirect_thunk_rax+0x5 ([kernel.kallsyms])
uname 28642 168664.856392: 10000 cycles:
ffffffff982a385b move_page_tables+0xbcb ([kernel.kallsyms])
ffffffff9831f889 shift_arg_pages+0xa9 ([kernel.kallsyms])
ffffffff9831fb4f setup_arg_pages+0x1ef ([kernel.kallsyms])
ffffffff9839691f load_elf_binary+0x39f ([kernel.kallsyms])
ffffffff98e00c45 __x86_indirect_thunk_rax+0x5 ([kernel.kallsyms])
#
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lore.kernel.org/lkml/20200401101613.6201-12-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/util/intel-pt.c | 68 ++++++++++++++++++++++++++++++++++----
1 file changed, 61 insertions(+), 7 deletions(-)
diff --git a/tools/perf/util/intel-pt.c b/tools/perf/util/intel-pt.c
index db25c77d82f3..a659b4a1b3f2 100644
--- a/tools/perf/util/intel-pt.c
+++ b/tools/perf/util/intel-pt.c
@@ -124,6 +124,8 @@ struct intel_pt {
struct range *time_ranges;
unsigned int range_cnt;
+
+ struct ip_callchain *chain;
};
enum switch_state {
@@ -868,6 +870,45 @@ static u64 intel_pt_ns_to_ticks(const struct intel_pt *pt, u64 ns)
pt->tc.time_mult;
}
+static struct ip_callchain *intel_pt_alloc_chain(struct intel_pt *pt)
+{
+ size_t sz = sizeof(struct ip_callchain);
+
+ /* Add 1 to callchain_sz for callchain context */
+ sz += (pt->synth_opts.callchain_sz + 1) * sizeof(u64);
+ return zalloc(sz);
+}
+
+static int intel_pt_callchain_init(struct intel_pt *pt)
+{
+ struct evsel *evsel;
+
+ evlist__for_each_entry(pt->session->evlist, evsel) {
+ if (!(evsel->core.attr.sample_type & PERF_SAMPLE_CALLCHAIN))
+ evsel->synth_sample_type |= PERF_SAMPLE_CALLCHAIN;
+ }
+
+ pt->chain = intel_pt_alloc_chain(pt);
+ if (!pt->chain)
+ return -ENOMEM;
+
+ return 0;
+}
+
+static void intel_pt_add_callchain(struct intel_pt *pt,
+ struct perf_sample *sample)
+{
+ struct thread *thread = machine__findnew_thread(pt->machine,
+ sample->pid,
+ sample->tid);
+
+ thread_stack__sample_late(thread, sample->cpu, pt->chain,
+ pt->synth_opts.callchain_sz + 1, sample->ip,
+ pt->kernel_start);
+
+ sample->callchain = pt->chain;
+}
+
static struct intel_pt_queue *intel_pt_alloc_queue(struct intel_pt *pt,
unsigned int queue_nr)
{
@@ -880,11 +921,7 @@ static struct intel_pt_queue *intel_pt_alloc_queue(struct intel_pt *pt,
return NULL;
if (pt->synth_opts.callchain) {
- size_t sz = sizeof(struct ip_callchain);
-
- /* Add 1 to callchain_sz for callchain context */
- sz += (pt->synth_opts.callchain_sz + 1) * sizeof(u64);
- ptq->chain = zalloc(sz);
+ ptq->chain = intel_pt_alloc_chain(pt);
if (!ptq->chain)
goto out_free;
}
@@ -1992,7 +2029,8 @@ static int intel_pt_sample(struct intel_pt_queue *ptq)
if (!(state->type & INTEL_PT_BRANCH))
return 0;
- if (pt->synth_opts.callchain || pt->synth_opts.thread_stack)
+ if (pt->synth_opts.callchain || pt->synth_opts.add_callchain ||
+ pt->synth_opts.thread_stack)
thread_stack__event(ptq->thread, ptq->cpu, ptq->flags, state->from_ip,
state->to_ip, ptq->insn_len,
state->trace_nr);
@@ -2639,6 +2677,11 @@ static int intel_pt_process_event(struct perf_session *session,
if (err)
return err;
+ if (event->header.type == PERF_RECORD_SAMPLE) {
+ if (pt->synth_opts.add_callchain && !sample->callchain)
+ intel_pt_add_callchain(pt, sample);
+ }
+
if (event->header.type == PERF_RECORD_AUX &&
(event->aux.flags & PERF_AUX_FLAG_TRUNCATED) &&
pt->synth_opts.errors) {
@@ -2710,6 +2753,7 @@ static void intel_pt_free(struct perf_session *session)
session->auxtrace = NULL;
thread__put(pt->unknown_thread);
addr_filters__exit(&pt->filts);
+ zfree(&pt->chain);
zfree(&pt->filter);
zfree(&pt->time_ranges);
free(pt);
@@ -3348,6 +3392,7 @@ int intel_pt_process_auxtrace_info(union perf_event *event,
!session->itrace_synth_opts->inject) {
pt->synth_opts.branches = false;
pt->synth_opts.callchain = true;
+ pt->synth_opts.add_callchain = true;
}
pt->synth_opts.thread_stack =
session->itrace_synth_opts->thread_stack;
@@ -3380,14 +3425,22 @@ int intel_pt_process_auxtrace_info(union perf_event *event,
pt->branches_filter |= PERF_IP_FLAG_RETURN |
PERF_IP_FLAG_TRACE_BEGIN;
- if (pt->synth_opts.callchain && !symbol_conf.use_callchain) {
+ if ((pt->synth_opts.callchain || pt->synth_opts.add_callchain) &&
+ !symbol_conf.use_callchain) {
symbol_conf.use_callchain = true;
if (callchain_register_param(&callchain_param) < 0) {
symbol_conf.use_callchain = false;
pt->synth_opts.callchain = false;
+ pt->synth_opts.add_callchain = false;
}
}
+ if (pt->synth_opts.add_callchain) {
+ err = intel_pt_callchain_init(pt);
+ if (err)
+ goto err_delete_thread;
+ }
+
err = intel_pt_synth_events(pt, session);
if (err)
goto err_delete_thread;
@@ -3410,6 +3463,7 @@ int intel_pt_process_auxtrace_info(union perf_event *event,
return 0;
err_delete_thread:
+ zfree(&pt->chain);
thread__zput(pt->unknown_thread);
err_free_queues:
intel_pt_log_disable();
--
2.21.1
next prev parent reply other threads:[~2020-04-20 11:56 UTC|newest]
Thread overview: 93+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-20 11:52 [GIT PULL] perf/core improvements and fixes Arnaldo Carvalho de Melo
2020-04-20 11:52 ` [PATCH 01/60] perf stat: Honour --timeout for forked workloads Arnaldo Carvalho de Melo
2020-04-20 11:52 ` [PATCH 02/60] perf tools: Synthesize bpf_trampoline/dispatcher ksymbol event Arnaldo Carvalho de Melo
2020-04-20 11:52 ` [PATCH 03/60] perf machine: Set ksymbol dso as loaded on arrival Arnaldo Carvalho de Melo
2020-04-20 11:52 ` [PATCH 04/60] perf annotate: Add basic support for bpf_image Arnaldo Carvalho de Melo
2020-04-20 11:52 ` [PATCH 05/60] capabilities: Introduce CAP_PERFMON to kernel and user space Arnaldo Carvalho de Melo
2020-04-20 11:52 ` [Intel-gfx] " Arnaldo Carvalho de Melo
2020-04-20 11:52 ` Arnaldo Carvalho de Melo
2020-04-20 11:52 ` [PATCH 06/60] perf/core: Open access to the core for CAP_PERFMON privileged process Arnaldo Carvalho de Melo
2020-04-20 11:52 ` [Intel-gfx] " Arnaldo Carvalho de Melo
2020-04-20 11:52 ` [PATCH 07/60] perf/core: open access to probes " Arnaldo Carvalho de Melo
2020-04-20 11:52 ` [Intel-gfx] " Arnaldo Carvalho de Melo
2020-04-20 11:52 ` [PATCH 08/60] perf tools: Support CAP_PERFMON capability Arnaldo Carvalho de Melo
2020-04-20 11:52 ` [Intel-gfx] " Arnaldo Carvalho de Melo
2020-04-20 11:52 ` [PATCH 09/60] drm/i915/perf: Open access for CAP_PERFMON privileged process Arnaldo Carvalho de Melo
2020-04-20 11:52 ` [Intel-gfx] " Arnaldo Carvalho de Melo
2020-04-20 11:52 ` Arnaldo Carvalho de Melo
2020-04-20 11:52 ` [PATCH 10/60] trace/bpf_trace: " Arnaldo Carvalho de Melo
2020-04-20 11:52 ` [Intel-gfx] " Arnaldo Carvalho de Melo
2020-04-20 11:52 ` [PATCH 11/60] powerpc/perf: open " Arnaldo Carvalho de Melo
2020-04-20 11:52 ` [Intel-gfx] " Arnaldo Carvalho de Melo
2020-04-20 11:52 ` Arnaldo Carvalho de Melo
2020-04-20 11:52 ` [PATCH 12/60] parisc/perf: " Arnaldo Carvalho de Melo
2020-04-20 11:52 ` [Intel-gfx] " Arnaldo Carvalho de Melo
2020-04-20 11:52 ` [PATCH 13/60] drivers/perf: Open " Arnaldo Carvalho de Melo
2020-04-20 11:52 ` [Intel-gfx] " Arnaldo Carvalho de Melo
2020-04-20 11:52 ` Arnaldo Carvalho de Melo
2020-04-20 11:52 ` [PATCH 14/60] drivers/oprofile: " Arnaldo Carvalho de Melo
2020-04-20 11:52 ` [Intel-gfx] " Arnaldo Carvalho de Melo
2020-04-20 11:52 ` [PATCH 15/60] doc/admin-guide: Update perf-security.rst with CAP_PERFMON information Arnaldo Carvalho de Melo
2020-04-20 11:52 ` [Intel-gfx] " Arnaldo Carvalho de Melo
2020-04-20 11:52 ` [PATCH 16/60] doc/admin-guide: update kernel.rst " Arnaldo Carvalho de Melo
2020-04-20 11:52 ` [Intel-gfx] " Arnaldo Carvalho de Melo
2020-04-20 11:52 ` [PATCH 17/60] perf script: Simplify auxiliary event printing functions Arnaldo Carvalho de Melo
2020-04-20 11:52 ` [PATCH 18/60] perf bench: Add event synthesis benchmark Arnaldo Carvalho de Melo
2020-04-20 11:52 ` [PATCH 19/60] tools api fs: Make xxx__mountpoint() more scalable Arnaldo Carvalho de Melo
2020-04-20 11:52 ` [PATCH 20/60] perf synthetic-events: save 4kb from 2 stack frames Arnaldo Carvalho de Melo
2020-04-20 11:52 ` [PATCH 21/60] perf expr: Add expr_ prefix for parse_ctx and parse_id Arnaldo Carvalho de Melo
2020-04-20 11:52 ` Arnaldo Carvalho de Melo
2020-04-20 11:52 ` Arnaldo Carvalho de Melo
2020-04-20 11:52 ` [PATCH 22/60] perf expr: Add expr_scanner_ctx object Arnaldo Carvalho de Melo
2020-04-20 11:52 ` Arnaldo Carvalho de Melo
2020-04-20 11:52 ` Arnaldo Carvalho de Melo
2020-04-20 11:52 ` [PATCH 23/60] perf metrictroup: Split the metricgroup__add_metric function Arnaldo Carvalho de Melo
2020-04-20 11:52 ` Arnaldo Carvalho de Melo
2020-04-20 11:52 ` Arnaldo Carvalho de Melo
2020-04-20 11:52 ` [PATCH 24/60] perf script: Add flamegraph.py script Arnaldo Carvalho de Melo
2020-04-20 11:52 ` [PATCH 25/60] perf auxtrace: Add ->evsel_is_auxtrace() callback Arnaldo Carvalho de Melo
2020-04-20 11:52 ` [PATCH 26/60] perf intel-pt: Implement " Arnaldo Carvalho de Melo
2020-04-20 11:52 ` [PATCH 27/60] perf intel-bts: " Arnaldo Carvalho de Melo
2020-04-20 11:52 ` [PATCH 28/60] perf arm-spe: " Arnaldo Carvalho de Melo
2020-04-20 11:52 ` [PATCH 29/60] perf cs-etm: " Arnaldo Carvalho de Melo
2020-04-20 11:52 ` [PATCH 30/60] perf s390-cpumsf: " Arnaldo Carvalho de Melo
2020-04-20 11:52 ` [PATCH 31/60] perf auxtrace: For reporting purposes, un-group AUX area event Arnaldo Carvalho de Melo
2020-04-20 11:52 ` [PATCH 32/60] perf auxtrace: Add an option to synthesize callchains for regular events Arnaldo Carvalho de Melo
2020-04-20 11:52 ` [PATCH 33/60] perf thread-stack: Add thread_stack__sample_late() Arnaldo Carvalho de Melo
2020-04-20 11:52 ` [PATCH 34/60] perf evsel: Be consistent when looking which evsel PERF_SAMPLE_ bits are set Arnaldo Carvalho de Melo
2020-04-20 11:52 ` [PATCH 35/60] perf evsel: Add support for synthesized sample type Arnaldo Carvalho de Melo
2020-04-20 11:52 ` Arnaldo Carvalho de Melo [this message]
2020-04-20 11:52 ` [PATCH 37/60] perf evsel: Move and globalize perf_evsel__find_pmu() and perf_evsel__is_aux_event() Arnaldo Carvalho de Melo
2020-04-20 11:52 ` [PATCH 38/60] perf evlist: Move leader-sampling configuration Arnaldo Carvalho de Melo
2020-04-20 11:52 ` [PATCH 39/60] perf evsel: Rearrange perf_evsel__config_leader_sampling() Arnaldo Carvalho de Melo
2020-04-20 11:52 ` [PATCH 40/60] perf evlist: Allow multiple read formats Arnaldo Carvalho de Melo
2020-04-20 11:52 ` [PATCH 41/60] perf tools: Add support for leader-sampling with AUX area events Arnaldo Carvalho de Melo
2020-04-20 11:52 ` [PATCH 42/60] perf stat: Force error in fallback on :k events Arnaldo Carvalho de Melo
2020-04-20 11:52 ` [PATCH 43/60] tools lib traceevent: Take care of return value of asprintf Arnaldo Carvalho de Melo
2020-04-20 11:53 ` [PATCH 44/60] perf pmu: Add support for PMU capabilities Arnaldo Carvalho de Melo
2020-04-20 11:53 ` [PATCH 45/60] perf doc: allow ASCIIDOC_EXTRA to be an argument Arnaldo Carvalho de Melo
2020-04-20 11:53 ` Arnaldo Carvalho de Melo
2020-04-20 11:53 ` [PATCH 46/60] perf parser: Add support to specify rXXX event with pmu Arnaldo Carvalho de Melo
2020-04-20 11:53 ` [PATCH 47/60] perf header: Support CPU PMU capabilities Arnaldo Carvalho de Melo
2020-04-20 11:53 ` [PATCH 48/60] perf machine: Remove the indent in resolve_lbr_callchain_sample Arnaldo Carvalho de Melo
2020-04-20 11:53 ` [PATCH 49/60] perf machine: Refine the function for LBR call stack reconstruction Arnaldo Carvalho de Melo
2020-04-20 11:53 ` [PATCH 50/60] perf machine: Factor out lbr_callchain_add_kernel_ip() Arnaldo Carvalho de Melo
2020-04-20 11:53 ` [PATCH 51/60] perf machine: Factor out lbr_callchain_add_lbr_ip() Arnaldo Carvalho de Melo
2020-04-20 11:53 ` [PATCH 52/60] perf thread: Add a knob for LBR stitch approach Arnaldo Carvalho de Melo
2020-04-20 11:53 ` [PATCH 53/60] perf thread: Save previous sample for LBR stitching approach Arnaldo Carvalho de Melo
2020-04-20 11:53 ` [PATCH 54/60] perf callchain: Save previous cursor nodes " Arnaldo Carvalho de Melo
2020-04-20 11:53 ` [PATCH 55/60] perf callchain: Stitch LBR call stack Arnaldo Carvalho de Melo
2020-04-20 11:53 ` [PATCH 56/60] perf report: Add option to enable the LBR stitching approach Arnaldo Carvalho de Melo
2020-04-20 11:53 ` [PATCH 57/60] perf script: " Arnaldo Carvalho de Melo
2020-04-20 11:53 ` [PATCH 58/60] perf top: " Arnaldo Carvalho de Melo
2020-04-20 11:53 ` [PATCH 59/60] perf c2c: " Arnaldo Carvalho de Melo
2020-04-20 11:53 ` [PATCH 60/60] perf hist: Add fast path for duplicate entries check Arnaldo Carvalho de Melo
2020-04-22 12:09 ` [GIT PULL] perf/core improvements and fixes Ingo Molnar
2020-04-23 21:28 ` Daniel Díaz
2020-04-24 13:07 ` Arnaldo Carvalho de Melo
2020-04-24 14:10 ` Andreas Gerstmayr
2020-05-04 19:07 ` Daniel Díaz
2020-05-05 16:37 ` Arnaldo Carvalho de Melo
2020-05-05 16:57 ` Daniel Díaz
2020-05-05 17:03 ` Arnaldo Carvalho de Melo
2020-05-08 13:04 ` [tip: perf/core] perf flamegraph: Use /bin/bash for report and record scripts tip-bot2 for Arnaldo Carvalho de Melo
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