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-rw-r--r--tools/perf/Makefile.perf2
-rw-r--r--tools/perf/arch/arm/Makefile7
-rw-r--r--tools/perf/arch/arm/include/perf_regs.h7
-rw-r--r--tools/perf/arch/arm/tests/dwarf-unwind.c60
-rw-r--r--tools/perf/arch/arm/tests/regs_load.S58
-rw-r--r--tools/perf/arch/arm/util/unwind-libdw.c36
-rw-r--r--tools/perf/arch/arm64/include/perf_regs.h2
-rw-r--r--tools/perf/builtin-sched.c32
-rw-r--r--tools/perf/config/Makefile4
-rw-r--r--tools/perf/tests/builtin-test.c2
-rw-r--r--tools/perf/tests/evsel-tp-sched.c3
-rw-r--r--tools/perf/tests/tests.h2
-rw-r--r--tools/perf/util/session.c5
13 files changed, 187 insertions, 33 deletions
diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf
index 2baf61cec7ff..dea2d633c374 100644
--- a/tools/perf/Makefile.perf
+++ b/tools/perf/Makefile.perf
@@ -411,7 +411,7 @@ LIB_OBJS += $(OUTPUT)tests/code-reading.o
LIB_OBJS += $(OUTPUT)tests/sample-parsing.o
LIB_OBJS += $(OUTPUT)tests/parse-no-sample-id-all.o
ifndef NO_DWARF_UNWIND
-ifeq ($(ARCH),x86)
+ifeq ($(ARCH),$(filter $(ARCH),x86 arm))
LIB_OBJS += $(OUTPUT)tests/dwarf-unwind.o
endif
endif
diff --git a/tools/perf/arch/arm/Makefile b/tools/perf/arch/arm/Makefile
index 67e9b3d38e89..09d62153d384 100644
--- a/tools/perf/arch/arm/Makefile
+++ b/tools/perf/arch/arm/Makefile
@@ -5,3 +5,10 @@ endif
ifndef NO_LIBUNWIND
LIB_OBJS += $(OUTPUT)arch/$(ARCH)/util/unwind-libunwind.o
endif
+ifndef NO_LIBDW_DWARF_UNWIND
+LIB_OBJS += $(OUTPUT)arch/$(ARCH)/util/unwind-libdw.o
+endif
+ifndef NO_DWARF_UNWIND
+LIB_OBJS += $(OUTPUT)arch/$(ARCH)/tests/regs_load.o
+LIB_OBJS += $(OUTPUT)arch/$(ARCH)/tests/dwarf-unwind.o
+endif
diff --git a/tools/perf/arch/arm/include/perf_regs.h b/tools/perf/arch/arm/include/perf_regs.h
index 2a1cfde66b69..f619c9c5a4bf 100644
--- a/tools/perf/arch/arm/include/perf_regs.h
+++ b/tools/perf/arch/arm/include/perf_regs.h
@@ -2,10 +2,15 @@
#define ARCH_PERF_REGS_H
#include <stdlib.h>
-#include "../../util/types.h"
+#include <linux/types.h>
#include <asm/perf_regs.h>
+void perf_regs_load(u64 *regs);
+
#define PERF_REGS_MASK ((1ULL << PERF_REG_ARM_MAX) - 1)
+#define PERF_REGS_MAX PERF_REG_ARM_MAX
+#define PERF_SAMPLE_REGS_ABI PERF_SAMPLE_REGS_ABI_32
+
#define PERF_REG_IP PERF_REG_ARM_PC
#define PERF_REG_SP PERF_REG_ARM_SP
diff --git a/tools/perf/arch/arm/tests/dwarf-unwind.c b/tools/perf/arch/arm/tests/dwarf-unwind.c
new file mode 100644
index 000000000000..9f870d27cb39
--- /dev/null
+++ b/tools/perf/arch/arm/tests/dwarf-unwind.c
@@ -0,0 +1,60 @@
+#include <string.h>
+#include "perf_regs.h"
+#include "thread.h"
+#include "map.h"
+#include "event.h"
+#include "tests/tests.h"
+
+#define STACK_SIZE 8192
+
+static int sample_ustack(struct perf_sample *sample,
+ struct thread *thread, u64 *regs)
+{
+ struct stack_dump *stack = &sample->user_stack;
+ struct map *map;
+ unsigned long sp;
+ u64 stack_size, *buf;
+
+ buf = malloc(STACK_SIZE);
+ if (!buf) {
+ pr_debug("failed to allocate sample uregs data\n");
+ return -1;
+ }
+
+ sp = (unsigned long) regs[PERF_REG_ARM_SP];
+
+ map = map_groups__find(thread->mg, MAP__VARIABLE, (u64) sp);
+ if (!map) {
+ pr_debug("failed to get stack map\n");
+ free(buf);
+ return -1;
+ }
+
+ stack_size = map->end - sp;
+ stack_size = stack_size > STACK_SIZE ? STACK_SIZE : stack_size;
+
+ memcpy(buf, (void *) sp, stack_size);
+ stack->data = (char *) buf;
+ stack->size = stack_size;
+ return 0;
+}
+
+int test__arch_unwind_sample(struct perf_sample *sample,
+ struct thread *thread)
+{
+ struct regs_dump *regs = &sample->user_regs;
+ u64 *buf;
+
+ buf = calloc(1, sizeof(u64) * PERF_REGS_MAX);
+ if (!buf) {
+ pr_debug("failed to allocate sample uregs data\n");
+ return -1;
+ }
+
+ perf_regs_load(buf);
+ regs->abi = PERF_SAMPLE_REGS_ABI;
+ regs->regs = buf;
+ regs->mask = PERF_REGS_MASK;
+
+ return sample_ustack(sample, thread, buf);
+}
diff --git a/tools/perf/arch/arm/tests/regs_load.S b/tools/perf/arch/arm/tests/regs_load.S
new file mode 100644
index 000000000000..e09e983946fe
--- /dev/null
+++ b/tools/perf/arch/arm/tests/regs_load.S
@@ -0,0 +1,58 @@
+#include <linux/linkage.h>
+
+#define R0 0x00
+#define R1 0x08
+#define R2 0x10
+#define R3 0x18
+#define R4 0x20
+#define R5 0x28
+#define R6 0x30
+#define R7 0x38
+#define R8 0x40
+#define R9 0x48
+#define SL 0x50
+#define FP 0x58
+#define IP 0x60
+#define SP 0x68
+#define LR 0x70
+#define PC 0x78
+
+/*
+ * Implementation of void perf_regs_load(u64 *regs);
+ *
+ * This functions fills in the 'regs' buffer from the actual registers values,
+ * in the way the perf built-in unwinding test expects them:
+ * - the PC at the time at the call to this function. Since this function
+ * is called using a bl instruction, the PC value is taken from LR.
+ * The built-in unwinding test then unwinds the call stack from the dwarf
+ * information in unwind__get_entries.
+ *
+ * Notes:
+ * - the 8 bytes stride in the registers offsets comes from the fact
+ * that the registers are stored in an u64 array (u64 *regs),
+ * - the regs buffer needs to be zeroed before the call to this function,
+ * in this case using a calloc in dwarf-unwind.c.
+ */
+
+.text
+.type perf_regs_load,%function
+ENTRY(perf_regs_load)
+ str r0, [r0, #R0]
+ str r1, [r0, #R1]
+ str r2, [r0, #R2]
+ str r3, [r0, #R3]
+ str r4, [r0, #R4]
+ str r5, [r0, #R5]
+ str r6, [r0, #R6]
+ str r7, [r0, #R7]
+ str r8, [r0, #R8]
+ str r9, [r0, #R9]
+ str sl, [r0, #SL]
+ str fp, [r0, #FP]
+ str ip, [r0, #IP]
+ str sp, [r0, #SP]
+ str lr, [r0, #LR]
+ str lr, [r0, #PC] // store pc as lr in order to skip the call
+ // to this function
+ mov pc, lr
+ENDPROC(perf_regs_load)
diff --git a/tools/perf/arch/arm/util/unwind-libdw.c b/tools/perf/arch/arm/util/unwind-libdw.c
new file mode 100644
index 000000000000..b4176c60117a
--- /dev/null
+++ b/tools/perf/arch/arm/util/unwind-libdw.c
@@ -0,0 +1,36 @@
+#include <elfutils/libdwfl.h>
+#include "../../util/unwind-libdw.h"
+#include "../../util/perf_regs.h"
+
+bool libdw__arch_set_initial_registers(Dwfl_Thread *thread, void *arg)
+{
+ struct unwind_info *ui = arg;
+ struct regs_dump *user_regs = &ui->sample->user_regs;
+ Dwarf_Word dwarf_regs[PERF_REG_ARM_MAX];
+
+#define REG(r) ({ \
+ Dwarf_Word val = 0; \
+ perf_reg_value(&val, user_regs, PERF_REG_ARM_##r); \
+ val; \
+})
+
+ dwarf_regs[0] = REG(R0);
+ dwarf_regs[1] = REG(R1);
+ dwarf_regs[2] = REG(R2);
+ dwarf_regs[3] = REG(R3);
+ dwarf_regs[4] = REG(R4);
+ dwarf_regs[5] = REG(R5);
+ dwarf_regs[6] = REG(R6);
+ dwarf_regs[7] = REG(R7);
+ dwarf_regs[8] = REG(R8);
+ dwarf_regs[9] = REG(R9);
+ dwarf_regs[10] = REG(R10);
+ dwarf_regs[11] = REG(FP);
+ dwarf_regs[12] = REG(IP);
+ dwarf_regs[13] = REG(SP);
+ dwarf_regs[14] = REG(LR);
+ dwarf_regs[15] = REG(PC);
+
+ return dwfl_thread_state_registers(thread, 0, PERF_REG_ARM_MAX,
+ dwarf_regs);
+}
diff --git a/tools/perf/arch/arm64/include/perf_regs.h b/tools/perf/arch/arm64/include/perf_regs.h
index 23595467402d..e9441b9e2a30 100644
--- a/tools/perf/arch/arm64/include/perf_regs.h
+++ b/tools/perf/arch/arm64/include/perf_regs.h
@@ -2,7 +2,7 @@
#define ARCH_PERF_REGS_H
#include <stdlib.h>
-#include "../../util/types.h"
+#include <linux/types.h>
#include <asm/perf_regs.h>
#define PERF_REGS_MASK ((1ULL << PERF_REG_ARM64_MAX) - 1)
diff --git a/tools/perf/builtin-sched.c b/tools/perf/builtin-sched.c
index 2579215f5743..d7176830b9b2 100644
--- a/tools/perf/builtin-sched.c
+++ b/tools/perf/builtin-sched.c
@@ -149,7 +149,6 @@ struct perf_sched {
unsigned long nr_runs;
unsigned long nr_timestamps;
unsigned long nr_unordered_timestamps;
- unsigned long nr_state_machine_bugs;
unsigned long nr_context_switch_bugs;
unsigned long nr_events;
unsigned long nr_lost_chunks;
@@ -1007,17 +1006,12 @@ static int latency_wakeup_event(struct perf_sched *sched,
struct perf_sample *sample,
struct machine *machine)
{
- const u32 pid = perf_evsel__intval(evsel, sample, "pid"),
- success = perf_evsel__intval(evsel, sample, "success");
+ const u32 pid = perf_evsel__intval(evsel, sample, "pid");
struct work_atoms *atoms;
struct work_atom *atom;
struct thread *wakee;
u64 timestamp = sample->time;
- /* Note for later, it may be interesting to observe the failing cases */
- if (!success)
- return 0;
-
wakee = machine__findnew_thread(machine, 0, pid);
atoms = thread_atoms_search(&sched->atom_root, wakee, &sched->cmp_pid);
if (!atoms) {
@@ -1037,12 +1031,18 @@ static int latency_wakeup_event(struct perf_sched *sched,
atom = list_entry(atoms->work_list.prev, struct work_atom, list);
/*
+ * As we do not guarantee the wakeup event happens when
+ * task is out of run queue, also may happen when task is
+ * on run queue and wakeup only change ->state to TASK_RUNNING,
+ * then we should not set the ->wake_up_time when wake up a
+ * task which is on run queue.
+ *
* You WILL be missing events if you've recorded only
* one CPU, or are only looking at only one, so don't
- * make useless noise.
+ * skip in this case.
*/
if (sched->profile_cpu == -1 && atom->state != THREAD_SLEEPING)
- sched->nr_state_machine_bugs++;
+ return 0;
sched->nr_timestamps++;
if (atom->sched_out_time > timestamp) {
@@ -1266,9 +1266,8 @@ static int process_sched_wakeup_event(struct perf_tool *tool,
static int map_switch_event(struct perf_sched *sched, struct perf_evsel *evsel,
struct perf_sample *sample, struct machine *machine)
{
- const u32 prev_pid = perf_evsel__intval(evsel, sample, "prev_pid"),
- next_pid = perf_evsel__intval(evsel, sample, "next_pid");
- struct thread *sched_out __maybe_unused, *sched_in;
+ const u32 next_pid = perf_evsel__intval(evsel, sample, "next_pid");
+ struct thread *sched_in;
int new_shortname;
u64 timestamp0, timestamp = sample->time;
s64 delta;
@@ -1291,7 +1290,6 @@ static int map_switch_event(struct perf_sched *sched, struct perf_evsel *evsel,
return -1;
}
- sched_out = machine__findnew_thread(machine, 0, prev_pid);
sched_in = machine__findnew_thread(machine, 0, next_pid);
sched->curr_thread[this_cpu] = sched_in;
@@ -1501,14 +1499,6 @@ static void print_bad_events(struct perf_sched *sched)
(double)sched->nr_lost_events/(double)sched->nr_events * 100.0,
sched->nr_lost_events, sched->nr_events, sched->nr_lost_chunks);
}
- if (sched->nr_state_machine_bugs && sched->nr_timestamps) {
- printf(" INFO: %.3f%% state machine bugs (%ld out of %ld)",
- (double)sched->nr_state_machine_bugs/(double)sched->nr_timestamps*100.0,
- sched->nr_state_machine_bugs, sched->nr_timestamps);
- if (sched->nr_lost_events)
- printf(" (due to lost events?)");
- printf("\n");
- }
if (sched->nr_context_switch_bugs && sched->nr_timestamps) {
printf(" INFO: %.3f%% context switch bugs (%ld out of %ld)",
(double)sched->nr_context_switch_bugs/(double)sched->nr_timestamps*100.0,
diff --git a/tools/perf/config/Makefile b/tools/perf/config/Makefile
index f2edc593a7a7..729bbdf5cec7 100644
--- a/tools/perf/config/Makefile
+++ b/tools/perf/config/Makefile
@@ -40,11 +40,11 @@ ifeq ($(ARCH),arm64)
LIBUNWIND_LIBS = -lunwind -lunwind-aarch64
endif
-# So far there's only x86 libdw unwind support merged in perf.
+# So far there's only x86 and arm libdw unwind support merged in perf.
# Disable it on all other architectures in case libdw unwind
# support is detected in system. Add supported architectures
# to the check.
-ifneq ($(ARCH),x86)
+ifneq ($(ARCH),$(filter $(ARCH),x86 arm))
NO_LIBDW_DWARF_UNWIND := 1
endif
diff --git a/tools/perf/tests/builtin-test.c b/tools/perf/tests/builtin-test.c
index 0d5afaf72944..5e0764b09317 100644
--- a/tools/perf/tests/builtin-test.c
+++ b/tools/perf/tests/builtin-test.c
@@ -115,7 +115,7 @@ static struct test {
.desc = "Test parsing with no sample_id_all bit set",
.func = test__parse_no_sample_id_all,
},
-#if defined(__x86_64__) || defined(__i386__)
+#if defined(__x86_64__) || defined(__i386__) || defined(__arm__)
#ifdef HAVE_DWARF_UNWIND_SUPPORT
{
.desc = "Test dwarf unwind",
diff --git a/tools/perf/tests/evsel-tp-sched.c b/tools/perf/tests/evsel-tp-sched.c
index 4774f7fbb758..35d7fdb2328d 100644
--- a/tools/perf/tests/evsel-tp-sched.c
+++ b/tools/perf/tests/evsel-tp-sched.c
@@ -74,9 +74,6 @@ int test__perf_evsel__tp_sched_test(void)
if (perf_evsel__test_field(evsel, "prio", 4, true))
ret = -1;
- if (perf_evsel__test_field(evsel, "success", 4, true))
- ret = -1;
-
if (perf_evsel__test_field(evsel, "target_cpu", 4, true))
ret = -1;
diff --git a/tools/perf/tests/tests.h b/tools/perf/tests/tests.h
index a9d7cb019f9e..8f91fb051ef1 100644
--- a/tools/perf/tests/tests.h
+++ b/tools/perf/tests/tests.h
@@ -45,7 +45,7 @@ int test__hists_filter(void);
int test__mmap_thread_lookup(void);
int test__thread_mg_share(void);
-#if defined(__x86_64__) || defined(__i386__)
+#if defined(__x86_64__) || defined(__i386__) || defined(__arm__)
#ifdef HAVE_DWARF_UNWIND_SUPPORT
struct thread;
struct perf_sample;
diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index 55960f22233c..64a186edc7be 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -1625,13 +1625,14 @@ out_delete_map:
void perf_session__fprintf_info(struct perf_session *session, FILE *fp,
bool full)
{
- int fd = perf_data_file__fd(session->file);
struct stat st;
- int ret;
+ int fd, ret;
if (session == NULL || fp == NULL)
return;
+ fd = perf_data_file__fd(session->file);
+
ret = fstat(fd, &st);
if (ret == -1)
return;
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-22 09:14:34 +0300