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Merge commit 'tip/perfcounters/core' into perf-counters-for-linus

hifive-unleashed-5.1
Peter Zijlstra 2009-07-22 18:05:48 +02:00
parent 1483b19f8f f1c6a58121
commit 1d2f37945d
10 changed files with 557 additions and 143 deletions
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255
arch/x86/kernel/cpu/perf_counter.c
View File

@ -65,6 +65,52 @@ static DEFINE_PER_CPU(struct cpu_hw_counters, cpu_hw_counters) = {
.enabled = 1,
};
/*
* Not sure about some of these
*/
static const u64 p6_perfmon_event_map[] =
{
[PERF_COUNT_HW_CPU_CYCLES] = 0x0079,
[PERF_COUNT_HW_INSTRUCTIONS] = 0x00c0,
[PERF_COUNT_HW_CACHE_REFERENCES] = 0x0000,
[PERF_COUNT_HW_CACHE_MISSES] = 0x0000,
[PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = 0x00c4,
[PERF_COUNT_HW_BRANCH_MISSES] = 0x00c5,
[PERF_COUNT_HW_BUS_CYCLES] = 0x0062,
};
static u64 p6_pmu_event_map(int event)
{
return p6_perfmon_event_map[event];
}
/*
* Counter setting that is specified not to count anything.
* We use this to effectively disable a counter.
*
* L2_RQSTS with 0 MESI unit mask.
*/
#define P6_NOP_COUNTER 0x0000002EULL
static u64 p6_pmu_raw_event(u64 event)
{
#define P6_EVNTSEL_EVENT_MASK 0x000000FFULL
#define P6_EVNTSEL_UNIT_MASK 0x0000FF00ULL
#define P6_EVNTSEL_EDGE_MASK 0x00040000ULL
#define P6_EVNTSEL_INV_MASK 0x00800000ULL
#define P6_EVNTSEL_COUNTER_MASK 0xFF000000ULL
#define P6_EVNTSEL_MASK \
(P6_EVNTSEL_EVENT_MASK | \
P6_EVNTSEL_UNIT_MASK | \
P6_EVNTSEL_EDGE_MASK | \
P6_EVNTSEL_INV_MASK | \
P6_EVNTSEL_COUNTER_MASK)
return event & P6_EVNTSEL_MASK;
}
/*
* Intel PerfMon v3. Used on Core2 and later.
*/
@ -666,6 +712,7 @@ static int __hw_perf_counter_init(struct perf_counter *counter)
{
struct perf_counter_attr *attr = &counter->attr;
struct hw_perf_counter *hwc = &counter->hw;
u64 config;
int err;
if (!x86_pmu_initialized())
@ -718,14 +765,40 @@ static int __hw_perf_counter_init(struct perf_counter *counter)
if (attr->config >= x86_pmu.max_events)
return -EINVAL;
/*
* The generic map:
*/
hwc->config |= x86_pmu.event_map(attr->config);
config = x86_pmu.event_map(attr->config);
if (config == 0)
return -ENOENT;
if (config == -1LL)
return -EINVAL;
hwc->config |= config;
return 0;
}
static void p6_pmu_disable_all(void)
{
struct cpu_hw_counters *cpuc = &__get_cpu_var(cpu_hw_counters);
u64 val;
if (!cpuc->enabled)
return;
cpuc->enabled = 0;
barrier();
/* p6 only has one enable register */
rdmsrl(MSR_P6_EVNTSEL0, val);
val &= ~ARCH_PERFMON_EVENTSEL0_ENABLE;
wrmsrl(MSR_P6_EVNTSEL0, val);
}
static void intel_pmu_disable_all(void)
{
wrmsrl(MSR_CORE_PERF_GLOBAL_CTRL, 0);
@ -767,6 +840,23 @@ void hw_perf_disable(void)
return x86_pmu.disable_all();
}
static void p6_pmu_enable_all(void)
{
struct cpu_hw_counters *cpuc = &__get_cpu_var(cpu_hw_counters);
unsigned long val;
if (cpuc->enabled)
return;
cpuc->enabled = 1;
barrier();
/* p6 only has one enable register */
rdmsrl(MSR_P6_EVNTSEL0, val);
val |= ARCH_PERFMON_EVENTSEL0_ENABLE;
wrmsrl(MSR_P6_EVNTSEL0, val);
}
static void intel_pmu_enable_all(void)
{
wrmsrl(MSR_CORE_PERF_GLOBAL_CTRL, x86_pmu.intel_ctrl);
@ -784,13 +874,13 @@ static void amd_pmu_enable_all(void)
barrier();
for (idx = 0; idx < x86_pmu.num_counters; idx++) {
struct perf_counter *counter = cpuc->counters[idx];
u64 val;
if (!test_bit(idx, cpuc->active_mask))
continue;
rdmsrl(MSR_K7_EVNTSEL0 + idx, val);
if (val & ARCH_PERFMON_EVENTSEL0_ENABLE)
continue;
val = counter->hw.config;
val |= ARCH_PERFMON_EVENTSEL0_ENABLE;
wrmsrl(MSR_K7_EVNTSEL0 + idx, val);
}
@ -819,16 +909,13 @@ static inline void intel_pmu_ack_status(u64 ack)
static inline void x86_pmu_enable_counter(struct hw_perf_counter *hwc, int idx)
{
int err;
err = checking_wrmsrl(hwc->config_base + idx,
(void)checking_wrmsrl(hwc->config_base + idx,
hwc->config | ARCH_PERFMON_EVENTSEL0_ENABLE);
}
static inline void x86_pmu_disable_counter(struct hw_perf_counter *hwc, int idx)
{
int err;
err = checking_wrmsrl(hwc->config_base + idx,
hwc->config);
(void)checking_wrmsrl(hwc->config_base + idx, hwc->config);
}
static inline void
@ -836,13 +923,24 @@ intel_pmu_disable_fixed(struct hw_perf_counter *hwc, int __idx)
{
int idx = __idx - X86_PMC_IDX_FIXED;
u64 ctrl_val, mask;
int err;
mask = 0xfULL << (idx * 4);
rdmsrl(hwc->config_base, ctrl_val);
ctrl_val &= ~mask;
err = checking_wrmsrl(hwc->config_base, ctrl_val);
(void)checking_wrmsrl(hwc->config_base, ctrl_val);
}
static inline void
p6_pmu_disable_counter(struct hw_perf_counter *hwc, int idx)
{
struct cpu_hw_counters *cpuc = &__get_cpu_var(cpu_hw_counters);
u64 val = P6_NOP_COUNTER;
if (cpuc->enabled)
val |= ARCH_PERFMON_EVENTSEL0_ENABLE;
(void)checking_wrmsrl(hwc->config_base + idx, val);
}
static inline void
@ -943,6 +1041,19 @@ intel_pmu_enable_fixed(struct hw_perf_counter *hwc, int __idx)
err = checking_wrmsrl(hwc->config_base, ctrl_val);
}
static void p6_pmu_enable_counter(struct hw_perf_counter *hwc, int idx)
{
struct cpu_hw_counters *cpuc = &__get_cpu_var(cpu_hw_counters);
u64 val;
val = hwc->config;
if (cpuc->enabled)
val |= ARCH_PERFMON_EVENTSEL0_ENABLE;
(void)checking_wrmsrl(hwc->config_base + idx, val);
}
static void intel_pmu_enable_counter(struct hw_perf_counter *hwc, int idx)
{
if (unlikely(hwc->config_base == MSR_ARCH_PERFMON_FIXED_CTR_CTRL)) {
@ -959,8 +1070,6 @@ static void amd_pmu_enable_counter(struct hw_perf_counter *hwc, int idx)
if (cpuc->enabled)
x86_pmu_enable_counter(hwc, idx);
else
x86_pmu_disable_counter(hwc, idx);
}
static int
@ -1176,6 +1285,49 @@ static void intel_pmu_reset(void)
local_irq_restore(flags);
}
static int p6_pmu_handle_irq(struct pt_regs *regs)
{
struct perf_sample_data data;
struct cpu_hw_counters *cpuc;
struct perf_counter *counter;
struct hw_perf_counter *hwc;
int idx, handled = 0;
u64 val;
data.regs = regs;
data.addr = 0;
cpuc = &__get_cpu_var(cpu_hw_counters);
for (idx = 0; idx < x86_pmu.num_counters; idx++) {
if (!test_bit(idx, cpuc->active_mask))
continue;
counter = cpuc->counters[idx];
hwc = &counter->hw;
val = x86_perf_counter_update(counter, hwc, idx);
if (val & (1ULL << (x86_pmu.counter_bits - 1)))
continue;
/*
* counter overflow
*/
handled = 1;
data.period = counter->hw.last_period;
if (!x86_perf_counter_set_period(counter, hwc, idx))
continue;
if (perf_counter_overflow(counter, 1, &data))
p6_pmu_disable_counter(hwc, idx);
}
if (handled)
inc_irq_stat(apic_perf_irqs);
return handled;
}
/*
* This handler is triggered by the local APIC, so the APIC IRQ handling
@ -1185,14 +1337,13 @@ static int intel_pmu_handle_irq(struct pt_regs *regs)
{
struct perf_sample_data data;
struct cpu_hw_counters *cpuc;
int bit, cpu, loops;
int bit, loops;
u64 ack, status;
data.regs = regs;
data.addr = 0;
cpu = smp_processor_id();
cpuc = &per_cpu(cpu_hw_counters, cpu);
cpuc = &__get_cpu_var(cpu_hw_counters);
perf_disable();
status = intel_pmu_get_status();
@ -1249,14 +1400,13 @@ static int amd_pmu_handle_irq(struct pt_regs *regs)
struct cpu_hw_counters *cpuc;
struct perf_counter *counter;
struct hw_perf_counter *hwc;
int cpu, idx, handled = 0;
int idx, handled = 0;
u64 val;
data.regs = regs;
data.addr = 0;
cpu = smp_processor_id();
cpuc = &per_cpu(cpu_hw_counters, cpu);
cpuc = &__get_cpu_var(cpu_hw_counters);
for (idx = 0; idx < x86_pmu.num_counters; idx++) {
if (!test_bit(idx, cpuc->active_mask))
@ -1353,6 +1503,32 @@ static __read_mostly struct notifier_block perf_counter_nmi_notifier = {
.priority = 1
};
static struct x86_pmu p6_pmu = {
.name = "p6",
.handle_irq = p6_pmu_handle_irq,
.disable_all = p6_pmu_disable_all,
.enable_all = p6_pmu_enable_all,
.enable = p6_pmu_enable_counter,
.disable = p6_pmu_disable_counter,
.eventsel = MSR_P6_EVNTSEL0,
.perfctr = MSR_P6_PERFCTR0,
.event_map = p6_pmu_event_map,
.raw_event = p6_pmu_raw_event,
.max_events = ARRAY_SIZE(p6_perfmon_event_map),
.max_period = (1ULL << 31) - 1,
.version = 0,
.num_counters = 2,
/*
* Counters have 40 bits implemented. However they are designed such
* that bits [32-39] are sign extensions of bit 31. As such the
* effective width of a counter for P6-like PMU is 32 bits only.
*
* See IA-32 Intel Architecture Software developer manual Vol 3B
*/
.counter_bits = 32,
.counter_mask = (1ULL << 32) - 1,
};
static struct x86_pmu intel_pmu = {
.name = "Intel",
.handle_irq = intel_pmu_handle_irq,
@ -1392,6 +1568,39 @@ static struct x86_pmu amd_pmu = {
.max_period = (1ULL << 47) - 1,
};
static int p6_pmu_init(void)
{
int high, low;
switch (boot_cpu_data.x86_model) {
case 1:
case 3: /* Pentium Pro */
case 5:
case 6: /* Pentium II */
case 7:
case 8:
case 11: /* Pentium III */
break;
case 9:
case 13:
/* Pentium M */
break;
default:
pr_cont("unsupported p6 CPU model %d ",
boot_cpu_data.x86_model);
return -ENODEV;
}
if (!cpu_has_apic) {
pr_info("no Local APIC, try rebooting with lapic");
return -ENODEV;
}
x86_pmu = p6_pmu;
return 0;
}
static int intel_pmu_init(void)
{
union cpuid10_edx edx;
@ -1400,8 +1609,14 @@ static int intel_pmu_init(void)
unsigned int ebx;
int version;
if (!cpu_has(&boot_cpu_data, X86_FEATURE_ARCH_PERFMON))
if (!cpu_has(&boot_cpu_data, X86_FEATURE_ARCH_PERFMON)) {
/* check for P6 processor family */
if (boot_cpu_data.x86 == 6) {
return p6_pmu_init();
} else {
return -ENODEV;
}
}
/*
* Check whether the Architectural PerfMon supports

36
kernel/perf_counter.c
View File

@ -146,6 +146,14 @@ static void put_ctx(struct perf_counter_context *ctx)
}
}
static void unclone_ctx(struct perf_counter_context *ctx)
{
if (ctx->parent_ctx) {
put_ctx(ctx->parent_ctx);
ctx->parent_ctx = NULL;
}
}
/*
* Get the perf_counter_context for a task and lock it.
* This has to cope with with the fact that until it is locked,
@ -1463,10 +1471,8 @@ static void perf_counter_enable_on_exec(struct task_struct *task)
/*
* Unclone this context if we enabled any counter.
*/
if (enabled && ctx->parent_ctx) {
put_ctx(ctx->parent_ctx);
ctx->parent_ctx = NULL;
}
if (enabled)
unclone_ctx(ctx);
spin_unlock(&ctx->lock);
@ -1526,7 +1532,6 @@ __perf_counter_init_context(struct perf_counter_context *ctx,
static struct perf_counter_context *find_get_context(pid_t pid, int cpu)
{
struct perf_counter_context *parent_ctx;
struct perf_counter_context *ctx;
struct perf_cpu_context *cpuctx;
struct task_struct *task;
@ -1586,11 +1591,7 @@ static struct perf_counter_context *find_get_context(pid_t pid, int cpu)
retry:
ctx = perf_lock_task_context(task, &flags);
if (ctx) {
parent_ctx = ctx->parent_ctx;
if (parent_ctx) {
put_ctx(parent_ctx);
ctx->parent_ctx = NULL; /* no longer a clone */
}
unclone_ctx(ctx);
spin_unlock_irqrestore(&ctx->lock, flags);
}
@ -4262,15 +4263,12 @@ void perf_counter_exit_task(struct task_struct *child)
*/
spin_lock(&child_ctx->lock);
child->perf_counter_ctxp = NULL;
if (child_ctx->parent_ctx) {
/*
* This context is a clone; unclone it so it can't get
* swapped to another process while we're removing all
* the counters from it.
*/
put_ctx(child_ctx->parent_ctx);
child_ctx->parent_ctx = NULL;
}
/*
* If this context is a clone; unclone it so it can't get
* swapped to another process while we're removing all
* the counters from it.
*/
unclone_ctx(child_ctx);
spin_unlock(&child_ctx->lock);
local_irq_restore(flags);

15
tools/perf/Documentation/perf-report.txt
View File

@ -24,6 +24,9 @@ OPTIONS
--dsos=::
Only consider symbols in these dsos. CSV that understands
file://filename entries.
-n
--show-nr-samples
Show the number of samples for each symbol
-C::
--comms=::
Only consider symbols in these comms. CSV that understands
@ -33,6 +36,18 @@ OPTIONS
Only consider these symbols. CSV that understands
file://filename entries.
-w::
--field-width=::
Force each column width to the provided list, for large terminal
readability.
-t::
--field-separator=::
Use a special separator character and don't pad with spaces, replacing
all occurances of this separator in symbol names (and other output)
with a '.' character, that thus it's the only non valid separator.
SEE ALSO
--------
linkperf:perf-stat[1]

227
tools/perf/builtin-report.c
View File

@ -33,8 +33,10 @@ static char *vmlinux = NULL;
static char default_sort_order[] = "comm,dso";
static char *sort_order = default_sort_order;
static char *dso_list_str, *comm_list_str, *sym_list_str;
static char *dso_list_str, *comm_list_str, *sym_list_str,
*col_width_list_str;
static struct strlist *dso_list, *comm_list, *sym_list;
static char *field_sep;
static int input;
static int show_mask = SHOW_KERNEL | SHOW_USER | SHOW_HV;
@ -49,6 +51,7 @@ static int verbose;
static int modules;
static int full_paths;
static int show_nr_samples;
static unsigned long page_size;
static unsigned long mmap_window = 32;
@ -129,6 +132,33 @@ typedef union event_union {
struct read_event read;
} event_t;
static int repsep_fprintf(FILE *fp, const char *fmt, ...)
{
int n;
va_list ap;
va_start(ap, fmt);
if (!field_sep)
n = vfprintf(fp, fmt, ap);
else {
char *bf = NULL;
n = vasprintf(&bf, fmt, ap);
if (n > 0) {
char *sep = bf;
while (1) {
sep = strchr(sep, *field_sep);
if (sep == NULL)
break;
*sep = '.';
}
}
fputs(bf, fp);
free(bf);
}
va_end(ap);
return n;
}
static LIST_HEAD(dsos);
static struct dso *kernel_dso;
static struct dso *vdso;
@ -360,12 +390,28 @@ static struct thread *thread__new(pid_t pid)
return self;
}
static unsigned int dsos__col_width,
comms__col_width,
threads__col_width;
static int thread__set_comm(struct thread *self, const char *comm)
{
if (self->comm)
free(self->comm);
self->comm = strdup(comm);
return self->comm ? 0 : -ENOMEM;
if (!self->comm)
return -ENOMEM;
if (!col_width_list_str && !field_sep &&
(!comm_list || strlist__has_entry(comm_list, comm))) {
unsigned int slen = strlen(comm);
if (slen > comms__col_width) {
comms__col_width = slen;
threads__col_width = slen + 6;
}
}
return 0;
}
static size_t thread__fprintf(struct thread *self, FILE *fp)
@ -536,7 +582,9 @@ struct sort_entry {
int64_t (*cmp)(struct hist_entry *, struct hist_entry *);
int64_t (*collapse)(struct hist_entry *, struct hist_entry *);
size_t (*print)(FILE *fp, struct hist_entry *);
size_t (*print)(FILE *fp, struct hist_entry *, unsigned int width);
unsigned int *width;
bool elide;
};
static int64_t cmp_null(void *l, void *r)
@ -558,15 +606,17 @@ sort__thread_cmp(struct hist_entry *left, struct hist_entry *right)
}
static size_t
sort__thread_print(FILE *fp, struct hist_entry *self)
sort__thread_print(FILE *fp, struct hist_entry *self, unsigned int width)
{
return fprintf(fp, "%16s:%5d", self->thread->comm ?: "", self->thread->pid);
return repsep_fprintf(fp, "%*s:%5d", width - 6,
self->thread->comm ?: "", self->thread->pid);
}
static struct sort_entry sort_thread = {
.header = " Command: Pid",
.header = "Command: Pid",
.cmp = sort__thread_cmp,
.print = sort__thread_print,
.width = &threads__col_width,
};
/* --sort comm */
@ -590,16 +640,17 @@ sort__comm_collapse(struct hist_entry *left, struct hist_entry *right)
}
static size_t
sort__comm_print(FILE *fp, struct hist_entry *self)
sort__comm_print(FILE *fp, struct hist_entry *self, unsigned int width)
{
return fprintf(fp, "%16s", self->thread->comm);
return repsep_fprintf(fp, "%*s", width, self->thread->comm);
}
static struct sort_entry sort_comm = {
.header = " Command",
.header = "Command",
.cmp = sort__comm_cmp,
.collapse = sort__comm_collapse,
.print = sort__comm_print,
.width = &comms__col_width,
};
/* --sort dso */
@ -617,18 +668,19 @@ sort__dso_cmp(struct hist_entry *left, struct hist_entry *right)
}
static size_t
sort__dso_print(FILE *fp, struct hist_entry *self)
sort__dso_print(FILE *fp, struct hist_entry *self, unsigned int width)
{
if (self->dso)
return fprintf(fp, "%-25s", self->dso->name);
return repsep_fprintf(fp, "%-*s", width, self->dso->name);
return fprintf(fp, "%016llx ", (u64)self->ip);
return repsep_fprintf(fp, "%*llx", width, (u64)self->ip);
}
static struct sort_entry sort_dso = {
.header = "Shared Object ",
.header = "Shared Object",
.cmp = sort__dso_cmp,
.print = sort__dso_print,
.width = &dsos__col_width,
};
/* --sort symbol */
@ -648,22 +700,22 @@ sort__sym_cmp(struct hist_entry *left, struct hist_entry *right)
}
static size_t
sort__sym_print(FILE *fp, struct hist_entry *self)
sort__sym_print(FILE *fp, struct hist_entry *self, unsigned int width __used)
{
size_t ret = 0;
if (verbose)
ret += fprintf(fp, "%#018llx ", (u64)self->ip);
ret += repsep_fprintf(fp, "%#018llx ", (u64)self->ip);
ret += repsep_fprintf(fp, "[%c] ", self->level);
if (self->sym) {
ret += fprintf(fp, "[%c] %s",
self->dso == kernel_dso ? 'k' :
self->dso == hypervisor_dso ? 'h' : '.', self->sym->name);
ret += repsep_fprintf(fp, "%s", self->sym->name);
if (self->sym->module)
ret += fprintf(fp, "\t[%s]", self->sym->module->name);
ret += repsep_fprintf(fp, "\t[%s]",
self->sym->module->name);
} else {
ret += fprintf(fp, "%#016llx", (u64)self->ip);
ret += repsep_fprintf(fp, "%#016llx", (u64)self->ip);
}
return ret;
@ -690,19 +742,19 @@ sort__parent_cmp(struct hist_entry *left, struct hist_entry *right)
}
static size_t
sort__parent_print(FILE *fp, struct hist_entry *self)
sort__parent_print(FILE *fp, struct hist_entry *self, unsigned int width)
{
size_t ret = 0;
ret += fprintf(fp, "%-20s", self->parent ? self->parent->name : "[other]");
return ret;
return repsep_fprintf(fp, "%-*s", width,
self->parent ? self->parent->name : "[other]");
}
static unsigned int parent_symbol__col_width;
static struct sort_entry sort_parent = {
.header = "Parent symbol ",
.header = "Parent symbol",
.cmp = sort__parent_cmp,
.print = sort__parent_print,
.width = &parent_symbol__col_width,
};
static int sort__need_collapse = 0;
@ -967,17 +1019,25 @@ hist_entry__fprintf(FILE *fp, struct hist_entry *self, u64 total_samples)
return 0;
if (total_samples)
ret = percent_color_fprintf(fp, " %6.2f%%",
(self->count * 100.0) / total_samples);
ret = percent_color_fprintf(fp,
field_sep ? "%.2f" : " %6.2f%%",
(self->count * 100.0) / total_samples);
else
ret = fprintf(fp, "%12Ld ", self->count);
ret = fprintf(fp, field_sep ? "%lld" : "%12lld ", self->count);
if (show_nr_samples) {
if (field_sep)
fprintf(fp, "%c%lld", *field_sep, self->count);
else
fprintf(fp, "%11lld", self->count);
}
list_for_each_entry(se, &hist_entry__sort_list, list) {
if (exclude_other && (se == &sort_parent))
if (se->elide)
continue;
fprintf(fp, " ");
ret += se->print(fp, self);
fprintf(fp, "%s", field_sep ?: " ");
ret += se->print(fp, self, se->width ? *se->width : 0);
}
ret += fprintf(fp, "\n");
@ -992,6 +1052,18 @@ hist_entry__fprintf(FILE *fp, struct hist_entry *self, u64 total_samples)
*
*/
static void dso__calc_col_width(struct dso *self)
{
if (!col_width_list_str && !field_sep &&
(!dso_list || strlist__has_entry(dso_list, self->name))) {
unsigned int slen = strlen(self->name);
if (slen > dsos__col_width)
dsos__col_width = slen;
}
self->slen_calculated = 1;
}
static struct symbol *
resolve_symbol(struct thread *thread, struct map **mapp,
struct dso **dsop, u64 *ipp)
@ -1011,6 +1083,14 @@ resolve_symbol(struct thread *thread, struct map **mapp,
map = thread__find_map(thread, ip);
if (map != NULL) {
/*
* We have to do this here as we may have a dso
* with no symbol hit that has a name longer than
* the ones with symbols sampled.
*/
if (!sort_dso.elide && !map->dso->slen_calculated)
dso__calc_col_width(map->dso);
if (mapp)
*mapp = map;
got_map:
@ -1282,35 +1362,67 @@ static size_t output__fprintf(FILE *fp, u64 total_samples)
struct sort_entry *se;
struct rb_node *nd;
size_t ret = 0;
unsigned int width;
char *col_width = col_width_list_str;
fprintf(fp, "\n");
fprintf(fp, "#\n");
fprintf(fp, "# (%Ld samples)\n", (u64)total_samples);
fprintf(fp, "# Samples: %Ld\n", (u64)total_samples);
fprintf(fp, "#\n");
fprintf(fp, "# Overhead");
if (show_nr_samples) {
if (field_sep)
fprintf(fp, "%cSamples", *field_sep);
else
fputs(" Samples ", fp);
}
list_for_each_entry(se, &hist_entry__sort_list, list) {
if (exclude_other && (se == &sort_parent))
if (se->elide)
continue;
fprintf(fp, " %s", se->header);
if (field_sep) {
fprintf(fp, "%c%s", *field_sep, se->header);
continue;
}
width = strlen(se->header);
if (se->width) {
if (col_width_list_str) {
if (col_width) {
*se->width = atoi(col_width);
col_width = strchr(col_width, ',');
if (col_width)
++col_width;
}
}
width = *se->width = max(*se->width, width);
}
fprintf(fp, " %*s", width, se->header);
}
fprintf(fp, "\n");
if (field_sep)
goto print_entries;
fprintf(fp, "# ........");
if (show_nr_samples)
fprintf(fp, " ..........");
list_for_each_entry(se, &hist_entry__sort_list, list) {
unsigned int i;
if (exclude_other && (se == &sort_parent))
if (se->elide)
continue;
fprintf(fp, " ");
for (i = 0; i < strlen(se->header); i++)
if (se->width)
width = *se->width;
else
width = strlen(se->header);
for (i = 0; i < width; i++)
fprintf(fp, ".");
}
fprintf(fp, "\n");
fprintf(fp, "#\n");
print_entries:
for (nd = rb_first(&output_hists); nd; nd = rb_next(nd)) {
pos = rb_entry(nd, struct hist_entry, rb_node);
ret += hist_entry__fprintf(fp, pos, total_samples);
@ -1883,6 +1995,8 @@ static const struct option options[] = {
OPT_STRING('k', "vmlinux", &vmlinux, "file", "vmlinux pathname"),
OPT_BOOLEAN('m', "modules", &modules,
"load module symbols - WARNING: use only with -k and LIVE kernel"),
OPT_BOOLEAN('n', "show-nr-samples", &show_nr_samples,
"Show a column with the number of samples"),
OPT_STRING('s', "sort", &sort_order, "key[,key2...]",
"sort by key(s): pid, comm, dso, symbol, parent"),
OPT_BOOLEAN('P', "full-paths", &full_paths,
@ -1900,6 +2014,12 @@ static const struct option options[] = {
"only consider symbols in these comms"),
OPT_STRING('S', "symbols", &sym_list_str, "symbol[,symbol...]",
"only consider these symbols"),
OPT_STRING('w', "column-widths", &col_width_list_str,
"width[,width...]",
"don't try to adjust column width, use these fixed values"),
OPT_STRING('t', "field-separator", &field_sep, "separator",
"separator for columns, no spaces will be added between "
"columns '.' is reserved."),
OPT_END()
};
@ -1919,7 +2039,8 @@ static void setup_sorting(void)
}
static void setup_list(struct strlist **list, const char *list_str,
const char *list_name)
struct sort_entry *se, const char *list_name,
FILE *fp)
{
if (list_str) {
*list = strlist__new(true, list_str);
@ -1928,6 +2049,11 @@ static void setup_list(struct strlist **list, const char *list_str,
list_name);
exit(129);
}
if (strlist__nr_entries(*list) == 1) {
fprintf(fp, "# %s: %s\n", list_name,
strlist__entry(*list, 0)->s);
se->elide = true;
}
}
}
@ -1941,9 +2067,10 @@ int cmd_report(int argc, const char **argv, const char *prefix __used)
setup_sorting();
if (parent_pattern != default_parent_pattern)
if (parent_pattern != default_parent_pattern) {
sort_dimension__add("parent");
else
sort_parent.elide = 1;
} else
exclude_other = 0;
/*
@ -1952,11 +2079,17 @@ int cmd_report(int argc, const char **argv, const char *prefix __used)
if (argc)
usage_with_options(report_usage, options);
setup_list(&dso_list, dso_list_str, "dso");
setup_list(&comm_list, comm_list_str, "comm");
setup_list(&sym_list, sym_list_str, "symbol");
setup_pager();
setup_list(&dso_list, dso_list_str, &sort_dso, "dso", stdout);
setup_list(&comm_list, comm_list_str, &sort_comm, "comm", stdout);
setup_list(&sym_list, sym_list_str, &sort_sym, "symbol", stdout);
if (field_sep && *field_sep == '.') {
fputs("'.' is the only non valid --field-separator argument\n",
stderr);
exit(129);
}
return __cmd_report();
}

8
tools/perf/perf.h
View File

@ -1,7 +1,13 @@
#ifndef _PERF_PERF_H
#define _PERF_PERF_H
#if defined(__x86_64__) || defined(__i386__)
#if defined(__i386__)
#include "../../arch/x86/include/asm/unistd.h"
#define rmb() asm volatile("lock; addl $0,0(%%esp)" ::: "memory")
#define cpu_relax() asm volatile("rep; nop" ::: "memory");
#endif
#if defined(__x86_64__)
#include "../../arch/x86/include/asm/unistd.h"
#define rmb() asm volatile("lfence" ::: "memory")
#define cpu_relax() asm volatile("rep; nop" ::: "memory");

8
tools/perf/util/include/linux/kernel.h
View File

@ -18,4 +18,12 @@
(type *)((char *)__mptr - offsetof(type, member)); })
#endif
#ifndef max
#define max(x, y) ({ \
typeof(x) _max1 = (x); \
typeof(y) _max2 = (y); \
(void) (&_max1 == &_max2); \
_max1 > _max2 ? _max1 : _max2; })
#endif
#endif

20
tools/perf/util/strlist.c
View File

@ -64,6 +64,7 @@ int strlist__add(struct strlist *self, const char *new_entry)
rb_link_node(&sn->rb_node, parent, p);
rb_insert_color(&sn->rb_node, &self->entries);
++self->nr_entries;
return 0;
}
@ -155,8 +156,9 @@ struct strlist *strlist__new(bool dupstr, const char *slist)
struct strlist *self = malloc(sizeof(*self));
if (self != NULL) {
self->entries = RB_ROOT;
self->dupstr = dupstr;
self->entries = RB_ROOT;
self->dupstr = dupstr;
self->nr_entries = 0;
if (slist && strlist__parse_list(self, slist) != 0)
goto out_error;
}
@ -182,3 +184,17 @@ void strlist__delete(struct strlist *self)
free(self);
}
}
struct str_node *strlist__entry(const struct strlist *self, unsigned int idx)
{
struct rb_node *nd;
for (nd = rb_first(&self->entries); nd; nd = rb_next(nd)) {
struct str_node *pos = rb_entry(nd, struct str_node, rb_node);
if (!idx--)
return pos;
}
return NULL;
}

11
tools/perf/util/strlist.h
View File

@ -11,7 +11,8 @@ struct str_node {
struct strlist {
struct rb_root entries;
bool dupstr;
unsigned int nr_entries;
bool dupstr;
};
struct strlist *strlist__new(bool dupstr, const char *slist);
@ -21,11 +22,17 @@ void strlist__remove(struct strlist *self, struct str_node *sn);
int strlist__load(struct strlist *self, const char *filename);
int strlist__add(struct strlist *self, const char *str);
struct str_node *strlist__entry(const struct strlist *self, unsigned int idx);
bool strlist__has_entry(struct strlist *self, const char *entry);
static inline bool strlist__empty(const struct strlist *self)
{
return rb_first(&self->entries) == NULL;
return self->nr_entries == 0;
}
static inline unsigned int strlist__nr_entries(const struct strlist *self)
{
return self->nr_entries;
}
int strlist__parse_list(struct strlist *self, const char *s);

119
tools/perf/util/symbol.c
View File

@ -65,6 +65,7 @@ struct dso *dso__new(const char *name, unsigned int sym_priv_size)
self->syms = RB_ROOT;
self->sym_priv_size = sym_priv_size;
self->find_symbol = dso__find_symbol;
self->slen_calculated = 0;
}
return self;
@ -373,36 +374,61 @@ static Elf_Scn *elf_section_by_name(Elf *elf, GElf_Ehdr *ep,
idx < nr_entries; \
++idx, pos = gelf_getrela(reldata, idx, &pos_mem))
static int dso__synthesize_plt_symbols(struct dso *self, Elf *elf,
GElf_Ehdr *ehdr, Elf_Scn *scn_dynsym,
GElf_Shdr *shdr_dynsym,
size_t dynsym_idx, int verbose)
/*
* We need to check if we have a .dynsym, so that we can handle the
* .plt, synthesizing its symbols, that aren't on the symtabs (be it
* .dynsym or .symtab).
* And always look at the original dso, not at debuginfo packages, that
* have the PLT data stripped out (shdr_rel_plt.sh_type == SHT_NOBITS).
*/
static int dso__synthesize_plt_symbols(struct dso *self, int verbose)
{
uint32_t nr_rel_entries, idx;
GElf_Sym sym;
u64 plt_offset;
GElf_Shdr shdr_plt;
struct symbol *f;
GElf_Shdr shdr_rel_plt;
GElf_Shdr shdr_rel_plt, shdr_dynsym;
Elf_Data *reldata, *syms, *symstrs;
Elf_Scn *scn_plt_rel, *scn_symstrs;
Elf_Scn *scn_plt_rel, *scn_symstrs, *scn_dynsym;
size_t dynsym_idx;
GElf_Ehdr ehdr;
char sympltname[1024];
int nr = 0, symidx;
Elf *elf;
int nr = 0, symidx, fd, err = 0;
scn_plt_rel = elf_section_by_name(elf, ehdr, &shdr_rel_plt,
fd = open(self->name, O_RDONLY);
if (fd < 0)
goto out;
elf = elf_begin(fd, ELF_C_READ_MMAP, NULL);
if (elf == NULL)
goto out_close;
if (gelf_getehdr(elf, &ehdr) == NULL)
goto out_elf_end;
scn_dynsym = elf_section_by_name(elf, &ehdr, &shdr_dynsym,
".dynsym", &dynsym_idx);
if (scn_dynsym == NULL)
goto out_elf_end;
scn_plt_rel = elf_section_by_name(elf, &ehdr, &shdr_rel_plt,
".rela.plt", NULL);
if (scn_plt_rel == NULL) {
scn_plt_rel = elf_section_by_name(elf, ehdr, &shdr_rel_plt,
scn_plt_rel = elf_section_by_name(elf, &ehdr, &shdr_rel_plt,
".rel.plt", NULL);
if (scn_plt_rel == NULL)
return 0;
goto out_elf_end;
}
if (shdr_rel_plt.sh_link != dynsym_idx)
return 0;
err = -1;
if (elf_section_by_name(elf, ehdr, &shdr_plt, ".plt", NULL) == NULL)
return 0;
if (shdr_rel_plt.sh_link != dynsym_idx)
goto out_elf_end;
if (elf_section_by_name(elf, &ehdr, &shdr_plt, ".plt", NULL) == NULL)
goto out_elf_end;
/*
* Fetch the relocation section to find the indexes to the GOT
@ -410,19 +436,19 @@ static int dso__synthesize_plt_symbols(struct dso *self, Elf *elf,
*/
reldata = elf_getdata(scn_plt_rel, NULL);
if (reldata == NULL)
return -1;
goto out_elf_end;
syms = elf_getdata(scn_dynsym, NULL);
if (syms == NULL)
return -1;
goto out_elf_end;
scn_symstrs = elf_getscn(elf, shdr_dynsym->sh_link);
scn_symstrs = elf_getscn(elf, shdr_dynsym.sh_link);
if (scn_symstrs == NULL)
return -1;
goto out_elf_end;
symstrs = elf_getdata(scn_symstrs, NULL);
if (symstrs == NULL)
return -1;
goto out_elf_end;
nr_rel_entries = shdr_rel_plt.sh_size / shdr_rel_plt.sh_entsize;
plt_offset = shdr_plt.sh_offset;
@ -441,7 +467,7 @@ static int dso__synthesize_plt_symbols(struct dso *self, Elf *elf,
f = symbol__new(plt_offset, shdr_plt.sh_entsize,
sympltname, self->sym_priv_size, 0, verbose);
if (!f)
return -1;
goto out_elf_end;
dso__insert_symbol(self, f);
++nr;
@ -459,19 +485,25 @@ static int dso__synthesize_plt_symbols(struct dso *self, Elf *elf,
f = symbol__new(plt_offset, shdr_plt.sh_entsize,
sympltname, self->sym_priv_size, 0, verbose);
if (!f)
return -1;
goto out_elf_end;
dso__insert_symbol(self, f);
++nr;
}
} else {
/*
* TODO: There are still one more shdr_rel_plt.sh_type
* I have to investigate, but probably should be ignored.
*/
}
return nr;
err = 0;
out_elf_end:
elf_end(elf);
out_close:
close(fd);
if (err == 0)
return nr;
out:
fprintf(stderr, "%s: problems reading %s PLT info.\n",
__func__, self->name);
return 0;
}
static int dso__load_sym(struct dso *self, int fd, const char *name,
@ -485,9 +517,8 @@ static int dso__load_sym(struct dso *self, int fd, const char *name,
GElf_Shdr shdr;
Elf_Data *syms;
GElf_Sym sym;
Elf_Scn *sec, *sec_dynsym, *sec_strndx;
Elf_Scn *sec, *sec_strndx;
Elf *elf;
size_t dynsym_idx;
int nr = 0;
elf = elf_begin(fd, ELF_C_READ_MMAP, NULL);
@ -504,32 +535,11 @@ static int dso__load_sym(struct dso *self, int fd, const char *name,
goto out_elf_end;
}
/*
* We need to check if we have a .dynsym, so that we can handle the
* .plt, synthesizing its symbols, that aren't on the symtabs (be it
* .dynsym or .symtab)
*/
sec_dynsym = elf_section_by_name(elf, &ehdr, &shdr,
".dynsym", &dynsym_idx);
if (sec_dynsym != NULL) {
nr = dso__synthesize_plt_symbols(self, elf, &ehdr,
sec_dynsym, &shdr,
dynsym_idx, verbose);
if (nr < 0)
goto out_elf_end;
}
/*
* But if we have a full .symtab (that is a superset of .dynsym) we
* should add the symbols not in the .dynsyn
*/
sec = elf_section_by_name(elf, &ehdr, &shdr, ".symtab", NULL);
if (sec == NULL) {
if (sec_dynsym == NULL)
sec = elf_section_by_name(elf, &ehdr, &shdr, ".dynsym", NULL);
if (sec == NULL)
goto out_elf_end;
sec = sec_dynsym;
gelf_getshdr(sec, &shdr);
}
syms = elf_getdata(sec, NULL);
@ -668,6 +678,11 @@ more:
if (!ret)
goto more;
if (ret > 0) {
int nr_plt = dso__synthesize_plt_symbols(self, verbose);
if (nr_plt > 0)
ret += nr_plt;
}
out:
free(name);
return ret;

1
tools/perf/util/symbol.h
View File

@ -25,6 +25,7 @@ struct dso {
struct symbol *(*find_symbol)(struct dso *, u64 ip);
unsigned int sym_priv_size;
unsigned char adjust_symbols;
unsigned char slen_calculated;
char name[0];
};