Add 'perf kvm-events' support to analyze kvm vmexit/mmio/ioport smartly
Usage:
perf kvm-events record
perf kvm-events report
Signed-off-by: Xiao Guangrong <xiaoguangr...@linux.vnet.ibm.com>
---
tools/perf/Documentation/perf-kvm-events.txt | 54 ++
tools/perf/Makefile | 1 +
tools/perf/builtin-kvm-events.c | 860 ++++++++++++++++++++++++++
tools/perf/builtin.h | 1 +
tools/perf/perf.c | 1 +
5 files changed, 917 insertions(+), 0 deletions(-)
create mode 100644 tools/perf/Documentation/perf-kvm-events.txt
create mode 100644 tools/perf/builtin-kvm-events.c
diff --git a/tools/perf/Documentation/perf-kvm-events.txt
b/tools/perf/Documentation/perf-kvm-events.txt
new file mode 100644
index 0000000..73bcb82
--- /dev/null
+++ b/tools/perf/Documentation/perf-kvm-events.txt
@@ -0,0 +1,54 @@
+perf-kvm-events(1)
+============
+
+NAME
+----
+perf-kvm-events - Analyze kvm events
+
+SYNOPSIS
+--------
+[verse]
+'perf kvm-events' {record|report}
+
+DESCRIPTION
+-----------
+You can analyze some crucial events and statistics with this
+'perf kvm-events' command.
+
+ 'perf kvm-events record <command>' records kvm events
+ between start and end <command>. And this command
+ produces the file "perf.data" which contains tracing
+ results of kvm events.
+
+ 'perf kvm-events report' reports statistical data.
+
+COMMON OPTIONS
+--------------
+
+-i::
+--input=<file>::
+ Input file name. (default: perf.data unless stdin is a fifo)
+
+-v::
+--verbose::
+ Be more verbose (show symbol address, etc).
+
+-D::
+--dump-raw-trace::
+ Dump raw trace in ASCII.
+
+REPORT OPTIONS
+--------------
+--vcpu=<value>::
+ analyze events which occures on this vcpu
+
+--events=<value>::
+ events to be analyzed. Possible values: vmexit, mmio, ioport.
+-k::
+--key=<value>::
+ Sorting key. Possible values: sample(default, sort by samples number),
+time(sort by time%).
+
+SEE ALSO
+--------
+linkperf:perf[1]
diff --git a/tools/perf/Makefile b/tools/perf/Makefile
index ac86d67..ee43451 100644
--- a/tools/perf/Makefile
+++ b/tools/perf/Makefile
@@ -382,6 +382,7 @@ BUILTIN_OBJS += $(OUTPUT)builtin-probe.o
BUILTIN_OBJS += $(OUTPUT)builtin-kmem.o
BUILTIN_OBJS += $(OUTPUT)builtin-lock.o
BUILTIN_OBJS += $(OUTPUT)builtin-kvm.o
+BUILTIN_OBJS += $(OUTPUT)builtin-kvm-events.o
BUILTIN_OBJS += $(OUTPUT)builtin-test.o
BUILTIN_OBJS += $(OUTPUT)builtin-inject.o
diff --git a/tools/perf/builtin-kvm-events.c b/tools/perf/builtin-kvm-events.c
new file mode 100644
index 0000000..55dc680
--- /dev/null
+++ b/tools/perf/builtin-kvm-events.c
@@ -0,0 +1,860 @@
+#include "builtin.h"
+#include "perf.h"
+#include "util/util.h"
+#include "util/cache.h"
+#include "util/symbol.h"
+#include "util/thread.h"
+#include "util/header.h"
+#include "util/parse-options.h"
+#include "util/trace-event.h"
+#include "util/debug.h"
+#include "util/session.h"
+#include "util/tool.h"
+
+#include <linux/hash.h>
+
+/*
+ * Todo: improve the print format of kvm_exit to let it is easier
+ * parsed by perf, then we can get the exit reason from print
+ * format directly.
+ */
+#define EXIT_REASON_EXCEPTION_NMI 0
+#define EXIT_REASON_EXTERNAL_INTERRUPT 1
+#define EXIT_REASON_TRIPLE_FAULT 2
+
+#define EXIT_REASON_PENDING_INTERRUPT 7
+#define EXIT_REASON_NMI_WINDOW 8
+#define EXIT_REASON_TASK_SWITCH 9
+#define EXIT_REASON_CPUID 10
+#define EXIT_REASON_HLT 12
+#define EXIT_REASON_INVD 13
+#define EXIT_REASON_INVLPG 14
+#define EXIT_REASON_RDPMC 15
+#define EXIT_REASON_RDTSC 16
+#define EXIT_REASON_VMCALL 18
+#define EXIT_REASON_VMCLEAR 19
+#define EXIT_REASON_VMLAUNCH 20
+#define EXIT_REASON_VMPTRLD 21
+#define EXIT_REASON_VMPTRST 22
+#define EXIT_REASON_VMREAD 23
+#define EXIT_REASON_VMRESUME 24
+#define EXIT_REASON_VMWRITE 25
+#define EXIT_REASON_VMOFF 26
+#define EXIT_REASON_VMON 27
+#define EXIT_REASON_CR_ACCESS 28
+#define EXIT_REASON_DR_ACCESS 29
+#define EXIT_REASON_IO_INSTRUCTION 30
+#define EXIT_REASON_MSR_READ 31
+#define EXIT_REASON_MSR_WRITE 32
+#define EXIT_REASON_INVALID_STATE 33
+#define EXIT_REASON_MWAIT_INSTRUCTION 36
+#define EXIT_REASON_MONITOR_INSTRUCTION 39
+#define EXIT_REASON_PAUSE_INSTRUCTION 40
+#define EXIT_REASON_MCE_DURING_VMENTRY 41
+#define EXIT_REASON_TPR_BELOW_THRESHOLD 43
+#define EXIT_REASON_APIC_ACCESS 44
+#define EXIT_REASON_EPT_VIOLATION 48
+#define EXIT_REASON_EPT_MISCONFIG 49
+#define EXIT_REASON_WBINVD 54
+#define EXIT_REASON_XSETBV 55
+
+#define SVM_EXIT_READ_CR0 0x000
+#define SVM_EXIT_READ_CR3 0x003
+#define SVM_EXIT_READ_CR4 0x004
+#define SVM_EXIT_READ_CR8 0x008
+#define SVM_EXIT_WRITE_CR0 0x010
+#define SVM_EXIT_WRITE_CR3 0x013
+#define SVM_EXIT_WRITE_CR4 0x014
+#define SVM_EXIT_WRITE_CR8 0x018
+#define SVM_EXIT_READ_DR0 0x020
+#define SVM_EXIT_READ_DR1 0x021
+#define SVM_EXIT_READ_DR2 0x022
+#define SVM_EXIT_READ_DR3 0x023
+#define SVM_EXIT_READ_DR4 0x024
+#define SVM_EXIT_READ_DR5 0x025
+#define SVM_EXIT_READ_DR6 0x026
+#define SVM_EXIT_READ_DR7 0x027
+#define SVM_EXIT_WRITE_DR0 0x030
+#define SVM_EXIT_WRITE_DR1 0x031
+#define SVM_EXIT_WRITE_DR2 0x032
+#define SVM_EXIT_WRITE_DR3 0x033
+#define SVM_EXIT_WRITE_DR4 0x034
+#define SVM_EXIT_WRITE_DR5 0x035
+#define SVM_EXIT_WRITE_DR6 0x036
+#define SVM_EXIT_WRITE_DR7 0x037
+#define SVM_EXIT_EXCP_BASE 0x040
+#define SVM_EXIT_INTR 0x060
+#define SVM_EXIT_NMI 0x061
+#define SVM_EXIT_SMI 0x062
+#define SVM_EXIT_INIT 0x063
+#define SVM_EXIT_VINTR 0x064
+#define SVM_EXIT_CR0_SEL_WRITE 0x065
+#define SVM_EXIT_IDTR_READ 0x066
+#define SVM_EXIT_GDTR_READ 0x067
+#define SVM_EXIT_LDTR_READ 0x068
+#define SVM_EXIT_TR_READ 0x069
+#define SVM_EXIT_IDTR_WRITE 0x06a
+#define SVM_EXIT_GDTR_WRITE 0x06b
+#define SVM_EXIT_LDTR_WRITE 0x06c
+#define SVM_EXIT_TR_WRITE 0x06d
+#define SVM_EXIT_RDTSC 0x06e
+#define SVM_EXIT_RDPMC 0x06f
+#define SVM_EXIT_PUSHF 0x070
+#define SVM_EXIT_POPF 0x071
+#define SVM_EXIT_CPUID 0x072
+#define SVM_EXIT_RSM 0x073
+#define SVM_EXIT_IRET 0x074
+#define SVM_EXIT_SWINT 0x075
+#define SVM_EXIT_INVD 0x076
+#define SVM_EXIT_PAUSE 0x077
+#define SVM_EXIT_HLT 0x078
+#define SVM_EXIT_INVLPG 0x079
+#define SVM_EXIT_INVLPGA 0x07a
+#define SVM_EXIT_IOIO 0x07b
+#define SVM_EXIT_MSR 0x07c
+#define SVM_EXIT_TASK_SWITCH 0x07d
+#define SVM_EXIT_FERR_FREEZE 0x07e
+#define SVM_EXIT_SHUTDOWN 0x07f
+#define SVM_EXIT_VMRUN 0x080
+#define SVM_EXIT_VMMCALL 0x081
+#define SVM_EXIT_VMLOAD 0x082
+#define SVM_EXIT_VMSAVE 0x083
+#define SVM_EXIT_STGI 0x084
+#define SVM_EXIT_CLGI 0x085
+#define SVM_EXIT_SKINIT 0x086
+#define SVM_EXIT_RDTSCP 0x087
+#define SVM_EXIT_ICEBP 0x088
+#define SVM_EXIT_WBINVD 0x089
+#define SVM_EXIT_MONITOR 0x08a
+#define SVM_EXIT_MWAIT 0x08b
+#define SVM_EXIT_MWAIT_COND 0x08c
+#define SVM_EXIT_XSETBV 0x08d
+#define SVM_EXIT_NPF 0x400
+
+#define DE_VECTOR 0
+#define DB_VECTOR 1
+#define BP_VECTOR 3
+#define OF_VECTOR 4
+#define BR_VECTOR 5
+#define UD_VECTOR 6
+#define NM_VECTOR 7
+#define DF_VECTOR 8
+#define TS_VECTOR 10
+#define NP_VECTOR 11
+#define SS_VECTOR 12
+#define GP_VECTOR 13
+#define PF_VECTOR 14
+#define MF_VECTOR 16
+#define MC_VECTOR 18
+
+
+#define VMX_EXIT_REASONS \
+ { EXIT_REASON_EXCEPTION_NMI, "EXCEPTION_NMI" }, \
+ { EXIT_REASON_EXTERNAL_INTERRUPT, "EXTERNAL_INTERRUPT" }, \
+ { EXIT_REASON_TRIPLE_FAULT, "TRIPLE_FAULT" }, \
+ { EXIT_REASON_PENDING_INTERRUPT, "PENDING_INTERRUPT" }, \
+ { EXIT_REASON_NMI_WINDOW, "NMI_WINDOW" }, \
+ { EXIT_REASON_TASK_SWITCH, "TASK_SWITCH" }, \
+ { EXIT_REASON_CPUID, "CPUID" }, \
+ { EXIT_REASON_HLT, "HLT" }, \
+ { EXIT_REASON_INVLPG, "INVLPG" }, \
+ { EXIT_REASON_RDPMC, "RDPMC" }, \
+ { EXIT_REASON_RDTSC, "RDTSC" }, \
+ { EXIT_REASON_VMCALL, "VMCALL" }, \
+ { EXIT_REASON_VMCLEAR, "VMCLEAR" }, \
+ { EXIT_REASON_VMLAUNCH, "VMLAUNCH" }, \
+ { EXIT_REASON_VMPTRLD, "VMPTRLD" }, \
+ { EXIT_REASON_VMPTRST, "VMPTRST" }, \
+ { EXIT_REASON_VMREAD, "VMREAD" }, \
+ { EXIT_REASON_VMRESUME, "VMRESUME" }, \
+ { EXIT_REASON_VMWRITE, "VMWRITE" }, \
+ { EXIT_REASON_VMOFF, "VMOFF" }, \
+ { EXIT_REASON_VMON, "VMON" }, \
+ { EXIT_REASON_CR_ACCESS, "CR_ACCESS" }, \
+ { EXIT_REASON_DR_ACCESS, "DR_ACCESS" }, \
+ { EXIT_REASON_IO_INSTRUCTION, "IO_INSTRUCTION" }, \
+ { EXIT_REASON_MSR_READ, "MSR_READ" }, \
+ { EXIT_REASON_MSR_WRITE, "MSR_WRITE" }, \
+ { EXIT_REASON_MWAIT_INSTRUCTION, "MWAIT_INSTRUCTION" }, \
+ { EXIT_REASON_MONITOR_INSTRUCTION, "MONITOR_INSTRUCTION" }, \
+ { EXIT_REASON_PAUSE_INSTRUCTION, "PAUSE_INSTRUCTION" }, \
+ { EXIT_REASON_MCE_DURING_VMENTRY, "MCE_DURING_VMENTRY" }, \
+ { EXIT_REASON_TPR_BELOW_THRESHOLD, "TPR_BELOW_THRESHOLD" },\
+ { EXIT_REASON_APIC_ACCESS, "APIC_ACCESS" }, \
+ { EXIT_REASON_EPT_VIOLATION, "EPT_VIOLATION" }, \
+ { EXIT_REASON_EPT_MISCONFIG, "EPT_MISCONFIG" }, \
+ { EXIT_REASON_WBINVD, "WBINVD" }
+
+#define SVM_EXIT_REASONS \
+ { SVM_EXIT_READ_CR0, "read_cr0" }, \
+ { SVM_EXIT_READ_CR3, "read_cr3" }, \
+ { SVM_EXIT_READ_CR4, "read_cr4" }, \
+ { SVM_EXIT_READ_CR8, "read_cr8" }, \
+ { SVM_EXIT_WRITE_CR0, "write_cr0" }, \
+ { SVM_EXIT_WRITE_CR3, "write_cr3" }, \
+ { SVM_EXIT_WRITE_CR4, "write_cr4" }, \
+ { SVM_EXIT_WRITE_CR8, "write_cr8" }, \
+ { SVM_EXIT_READ_DR0, "read_dr0" }, \
+ { SVM_EXIT_READ_DR1, "read_dr1" }, \
+ { SVM_EXIT_READ_DR2, "read_dr2" }, \
+ { SVM_EXIT_READ_DR3, "read_dr3" }, \
+ { SVM_EXIT_WRITE_DR0, "write_dr0" }, \
+ { SVM_EXIT_WRITE_DR1, "write_dr1" }, \
+ { SVM_EXIT_WRITE_DR2, "write_dr2" }, \
+ { SVM_EXIT_WRITE_DR3, "write_dr3" }, \
+ { SVM_EXIT_WRITE_DR5, "write_dr5" }, \
+ { SVM_EXIT_WRITE_DR7, "write_dr7" }, \
+ { SVM_EXIT_EXCP_BASE + DB_VECTOR, "DB excp" }, \
+ { SVM_EXIT_EXCP_BASE + BP_VECTOR, "BP excp" }, \
+ { SVM_EXIT_EXCP_BASE + UD_VECTOR, "UD excp" }, \
+ { SVM_EXIT_EXCP_BASE + PF_VECTOR, "PF excp" }, \
+ { SVM_EXIT_EXCP_BASE + NM_VECTOR, "NM excp" }, \
+ { SVM_EXIT_EXCP_BASE + MC_VECTOR, "MC excp" }, \
+ { SVM_EXIT_INTR, "interrupt" }, \
+ { SVM_EXIT_NMI, "nmi" }, \
+ { SVM_EXIT_SMI, "smi" }, \
+ { SVM_EXIT_INIT, "init" }, \
+ { SVM_EXIT_VINTR, "vintr" }, \
+ { SVM_EXIT_CPUID, "cpuid" }, \
+ { SVM_EXIT_INVD, "invd" }, \
+ { SVM_EXIT_HLT, "hlt" }, \
+ { SVM_EXIT_INVLPG, "invlpg" }, \
+ { SVM_EXIT_INVLPGA, "invlpga" }, \
+ { SVM_EXIT_IOIO, "io" }, \
+ { SVM_EXIT_MSR, "msr" }, \
+ { SVM_EXIT_TASK_SWITCH, "task_switch" }, \
+ { SVM_EXIT_SHUTDOWN, "shutdown" }, \
+ { SVM_EXIT_VMRUN, "vmrun" }, \
+ { SVM_EXIT_VMMCALL, "hypercall" }, \
+ { SVM_EXIT_VMLOAD, "vmload" }, \
+ { SVM_EXIT_VMSAVE, "vmsave" }, \
+ { SVM_EXIT_STGI, "stgi" }, \
+ { SVM_EXIT_CLGI, "clgi" }, \
+ { SVM_EXIT_SKINIT, "skinit" }, \
+ { SVM_EXIT_WBINVD, "wbinvd" }, \
+ { SVM_EXIT_MONITOR, "monitor" }, \
+ { SVM_EXIT_MWAIT, "mwait" }, \
+ { SVM_EXIT_XSETBV, "xsetbv" }, \
+ { SVM_EXIT_NPF, "npf" }
+
+struct exit_reasons_table {
+ unsigned long exit_code;
+ const char *reason;
+};
+
+struct exit_reasons_table vmx_exit_reasons[] = {
+ VMX_EXIT_REASONS
+};
+
+struct exit_reasons_table svm_exit_reasons[] = {
+ SVM_EXIT_REASONS
+};
+
+static const char *get_exit_reason(long isa, u64 exit_code)
+{
+ int table_size = ARRAY_SIZE(svm_exit_reasons);
+ struct exit_reasons_table *table = svm_exit_reasons;
+
+
+ if (isa == 1) {
+ table = vmx_exit_reasons;
+ table_size = ARRAY_SIZE(vmx_exit_reasons);
+ }
+
+ while (table_size--) {
+ if (table->exit_code == exit_code)
+ return table->reason;
+ table++;
+ }
+
+ die("unkonw kvm exit code:%ld on %s\n", exit_code, isa == 1 ?
+ "VMX" : "SVM");
+}
+
+struct event_key {
+ u64 key;
+ int info;
+};
+
+struct kvm_events_ops {
+ bool (*is_begain_event)(struct event *event, void *data);
+ bool (*is_end_event)(struct event *event);
+ struct event_key (*get_key)(struct event *event, void *data);
+ void (*decode_key)(struct event_key *key, char decode[20]);
+ const char *name;
+};
+
+static bool exit_event_begain(struct event *event, void *data __unused)
+{
+ return !strcmp(event->name, "kvm_exit");
+}
+
+static bool exit_event_end(struct event *event)
+{
+ return !strcmp(event->name, "kvm_entry");
+}
+
+static struct event_key exit_event_get_key(struct event *event, void *data)
+{
+ struct event_key key;
+
+ key.key = raw_field_value(event, "exit_reason", data);
+ key.info = raw_field_value(event, "isa", data);
+ return key;
+}
+
+static void exit_event_decode_key(struct event_key *key, char decode[20])
+{
+ const char *exit_reason = get_exit_reason(key->info, key->key);
+
+ memset(decode, 0, 20);
+ strncpy(decode, exit_reason, 20);
+}
+
+static struct kvm_events_ops exit_events = {
+ .is_begain_event = exit_event_begain,
+ .is_end_event = exit_event_end,
+ .get_key = exit_event_get_key,
+ .decode_key = exit_event_decode_key,
+ .name = "VM-EXIT"
+};
+
+#define KVM_TRACE_MMIO_READ_UNSATISFIED 0
+#define KVM_TRACE_MMIO_READ 1
+#define KVM_TRACE_MMIO_WRITE 2
+static bool mmio_event_begain(struct event *event, void *data)
+{
+ if (!strcmp(event->name, "kvm_mmio")) {
+ long type = raw_field_value(event, "type", data);
+
+ if (type != KVM_TRACE_MMIO_READ_UNSATISFIED)
+ return true;
+ };
+
+ return false;
+}
+
+static bool mmio_event_end(struct event *event)
+{
+ return !strcmp(event->name, "kvm_mmio_done");
+}
+
+static struct event_key mmio_event_get_key(struct event *event, void *data)
+{
+ struct event_key key;
+
+ key.key = raw_field_value(event, "gpa", data);
+ key.info = raw_field_value(event, "type", data);
+
+ return key;
+}
+
+static void mmio_event_decode_key(struct event_key *key, char decode[20])
+{
+ memset(decode, 0, 20);
+ sprintf(decode, "%#lx:%s", key->key,
+ key->info == KVM_TRACE_MMIO_READ ? "R" : "W");
+}
+
+static struct kvm_events_ops mmio_events = {
+ .is_begain_event = mmio_event_begain,
+ .is_end_event = mmio_event_end,
+ .get_key = mmio_event_get_key,
+ .decode_key = mmio_event_decode_key,
+ .name = "MMIO Access"
+};
+
+static bool ioport_event_begain(struct event *event, void *data __unused)
+{
+ return !strcmp(event->name, "kvm_pio");
+}
+
+static struct event_key ioport_event_get_key(struct event *event, void *data)
+{
+ struct event_key key;
+
+ key.key = raw_field_value(event, "port", data);
+ key.info = raw_field_value(event, "rw", data);
+
+ return key;
+}
+
+static void ioport_event_decode_key(struct event_key *key, char decode[20])
+{
+ memset(decode, 0, 20);
+ sprintf(decode, "%#lx:%s", key->key, key->info ? "POUT" : "PIN");
+}
+
+static struct kvm_events_ops ioport_events = {
+ .is_begain_event = ioport_event_begain,
+ .is_end_event = mmio_event_end,
+ .get_key = ioport_event_get_key,
+ .decode_key = ioport_event_decode_key,
+ .name = "IO Port Access"
+};
+
+static const char *report_event = "vmexit";
+struct kvm_events_ops *events_ops;
+
+static void register_kvm_events_ops(void)
+{
+ if (!strcmp(report_event, "vmexit"))
+ events_ops = &exit_events;
+ else if (!strcmp(report_event, "mmio"))
+ events_ops = &mmio_events;
+ else if (!strcmp(report_event, "ioport"))
+ events_ops = &ioport_events;
+ else
+ die("Unknown report event:%s\n", report_event);
+}
+
+#define KVM_MAX_VCPUS 254
+
+struct kvm_event {
+ struct list_head hash_entry;
+ struct rb_node rb;
+
+ u64 count;
+ u64 time;
+ struct {
+ u64 count;
+ u64 time;
+ } vcpu[KVM_MAX_VCPUS];
+
+ struct event_key key;
+};
+
+struct {
+ u64 start_time;
+ struct kvm_event *last_event;
+} vcpu_event_record[KVM_MAX_VCPUS] ;
+
+#define EVENTS_BITS 12
+#define EVENTS_CACHE_SIZE (1UL << EVENTS_BITS)
+
+static u64 total_time;
+static u64 total_count;
+static struct list_head kvm_events_cache[EVENTS_CACHE_SIZE];
+
+static void init_kvm_event_record(void)
+{
+ int i;
+
+ for (i = 0; i < KVM_MAX_VCPUS; i++)
+ vcpu_event_record[i].last_event = NULL;
+
+ for (i = 0; i < (int)EVENTS_CACHE_SIZE; i++)
+ INIT_LIST_HEAD(&kvm_events_cache[i]);
+}
+
+static int kvm_events_hash_fn(u64 key)
+{
+ return hash_long((unsigned long)key, EVENTS_BITS);
+}
+
+static void kvm_event_init(struct kvm_event *event, struct event_key *key)
+{
+ event->key = *key;
+}
+
+static struct kvm_event *find_create_kvm_event(struct event_key *key)
+{
+ struct kvm_event *event;
+ struct list_head *head;
+
+ head = &kvm_events_cache[kvm_events_hash_fn(key->key)];
+ list_for_each_entry(event, head, hash_entry)
+ if (event->key.key == key->key && event->key.info == key->info)
+ return event;
+
+ event = zalloc(sizeof(*event));
+ if (!event)
+ die("Not enough memory\n");
+
+ kvm_event_init(event, key);
+ list_add(&event->hash_entry, head);
+ return event;
+}
+
+static void handle_begain_event(struct event_key *key, int vcpu_id,
+ u64 timestamp)
+{
+ struct kvm_event *event = find_create_kvm_event(key);
+
+ vcpu_event_record[vcpu_id].last_event = event;
+ vcpu_event_record[vcpu_id].start_time = timestamp;
+}
+
+static void update_kvm_event(struct kvm_event *event, int vcpu_id,
+ u64 time_diff)
+{
+ event->count++;
+ event->time += time_diff;
+ event->vcpu[vcpu_id].count++;
+ event->vcpu[vcpu_id].time += time_diff;
+}
+
+static void handle_end_event(int vcpu_id, u64 timestamp)
+{
+ u64 time_begain, time_diff;
+ struct kvm_event *event;
+
+ event = vcpu_event_record[vcpu_id].last_event;
+ if (!event)
+ return;
+
+ time_begain = vcpu_event_record[vcpu_id].start_time;
+
+ vcpu_event_record[vcpu_id].last_event = NULL;
+ vcpu_event_record[vcpu_id].start_time = 0;
+
+ BUG_ON(!time_begain || timestamp < time_begain);
+
+ time_diff = timestamp - time_begain;
+ update_kvm_event(event, vcpu_id, time_diff);
+}
+
+static int get_vcpu_id(struct event *event, void *data)
+{
+ return raw_field_value(event, "vcpu_id", data);
+}
+
+static void handle_kvm_event(struct event *event, void *data, u64 timestamp)
+{
+ int vcpu_id;
+
+ if (events_ops->is_begain_event(event, data)) {
+ struct event_key key = events_ops->get_key(event, data);
+
+ vcpu_id = get_vcpu_id(event, data);
+ return handle_begain_event(&key, vcpu_id, timestamp);
+ }
+
+ if (events_ops->is_end_event(event)) {
+ vcpu_id = get_vcpu_id(event, data);
+ return handle_end_event(vcpu_id, timestamp);
+ }
+}
+
+typedef int (*key_cmp_fun)(struct kvm_event*, struct kvm_event*, int);
+struct kvm_event_key {
+ const char *name;
+ key_cmp_fun key;
+};
+
+static int trace_vcpu = -1;
+#define COMPARE_EVENT_KEY(member) \
+static u64 get_event_ ##member(struct kvm_event *event, int vcpu) \
+{ \
+ if (vcpu == -1) \
+ return event->member; \
+ \
+ return event->vcpu[vcpu].member; \
+} \
+ \
+static int compare_kvm_event_ ## member(struct kvm_event *one, \
+ struct kvm_event *two, int vcpu)\
+{ \
+ return get_event_ ##member(one, vcpu) > get_event_ ##member(two, vcpu);\
+}
+
+COMPARE_EVENT_KEY(count);
+COMPARE_EVENT_KEY(time);
+
+#define DEF_SORT_NAME_KEY(name, compare_key) \
+ { #name, compare_kvm_event_ ## compare_key }
+
+static struct kvm_event_key keys[] = {
+ DEF_SORT_NAME_KEY(sample, count),
+ DEF_SORT_NAME_KEY(time, time),
+ { NULL, NULL }
+};
+
+static const char *sort_key = "sample";
+static key_cmp_fun compare;
+
+static void select_key(void)
+{
+ int i;
+
+ for (i = 0; keys[i].name; i++) {
+ if (!strcmp(keys[i].name, sort_key)) {
+ compare = keys[i].key;
+ return;
+ }
+ }
+
+ die("Unknown compare key:%s\n", sort_key);
+}
+
+static struct rb_root result;
+static void insert_to_result(struct kvm_event *event, key_cmp_fun bigger,
+ int vcpu)
+{
+ struct rb_node **rb = &result.rb_node;
+ struct rb_node *parent = NULL;
+ struct kvm_event *p;
+
+ while (*rb) {
+ p = container_of(*rb, struct kvm_event, rb);
+ parent = *rb;
+
+ if (bigger(event, p, vcpu))
+ rb = &(*rb)->rb_left;
+ else
+ rb = &(*rb)->rb_right;
+ }
+
+ rb_link_node(&event->rb, parent, rb);
+ rb_insert_color(&event->rb, &result);
+}
+
+static void update_total_count(struct kvm_event *event, int vcpu)
+{
+ total_count += get_event_count(event, vcpu);
+ total_time += get_event_time(event, vcpu);
+}
+
+static bool event_is_valid(struct kvm_event *event, int vcpu)
+{
+ return get_event_count(event, vcpu);
+}
+
+static void sort_result(int vcpu)
+{
+ unsigned int i;
+ struct kvm_event *event;
+
+ for (i = 0; i < EVENTS_CACHE_SIZE; i++)
+ list_for_each_entry(event, &kvm_events_cache[i], hash_entry)
+ if (event_is_valid(event, vcpu)) {
+ update_total_count(event, vcpu);
+ insert_to_result(event, compare, vcpu);
+ }
+}
+
+/* returns left most element of result, and erase it */
+static struct kvm_event *pop_from_result(void)
+{
+ struct rb_node *node = result.rb_node;
+
+ if (!node)
+ return NULL;
+
+ while (node->rb_left)
+ node = node->rb_left;
+
+ rb_erase(node, &result);
+ return container_of(node, struct kvm_event, rb);
+}
+
+static void print_vcpu_info(int vcpu)
+{
+ pr_info("Analyze events for ");
+
+ if (vcpu == -1)
+ pr_info("all VCPUs:\n\n");
+ else
+ pr_info("VCPU %d:\n\n", vcpu);
+}
+
+static void print_result(int vcpu)
+{
+ char decode[20];
+ struct kvm_event *event;
+
+ pr_info("\n\n");
+ print_vcpu_info(vcpu);
+ pr_info("%20s ", events_ops->name);
+ pr_info("%10s ", "Samples");
+ pr_info("%13s ", "Samples%");
+
+ pr_info("%13s ", "Time%");
+ pr_info("%15s ", "Avg time");
+ pr_info("\n\n");
+
+ while ((event = pop_from_result())) {
+ u64 ecount, etime;
+
+ ecount = get_event_count(event, vcpu);
+ etime = get_event_time(event, vcpu);
+
+ events_ops->decode_key(&event->key, decode);
+ pr_info("%20s ", decode);
+ pr_info("%10lu ", ecount);
+ pr_info("%12.2f%% ", (double)ecount / total_count * 100);
+ pr_info("%12.2f%%", (double)etime / total_time * 100);
+ pr_info("%13.2fus ", (double)etime / ecount/1e3);
+ pr_info("\n");
+ }
+
+ pr_info("\nTotal Samples:%ld, Total events handled time:%.2fus.\n\n",
+ total_count, total_time / 1e3);
+}
+
+static void process_raw_event(void *data, int __unused cpu, u64 timestamp,
+ struct thread *thread __unused)
+{
+ struct event *event;
+ int type;
+
+ type = trace_parse_common_type(data);
+ event = trace_find_event(type);
+
+ return handle_kvm_event(event, data, timestamp);
+}
+
+static int process_sample_event(struct perf_tool *tool __used,
+ union perf_event *event,
+ struct perf_sample *sample,
+ struct perf_evsel *evsel __used,
+ struct machine *machine)
+{
+ struct thread *thread = machine__findnew_thread(machine, sample->tid);
+
+ if (thread == NULL) {
+ pr_debug("problem processing %d event, skipping it.\n",
+ event->header.type);
+ return -1;
+ }
+
+ process_raw_event(sample->raw_data, sample->cpu, sample->time, thread);
+
+ return 0;
+}
+
+static struct perf_tool eops = {
+ .sample = process_sample_event,
+ .comm = perf_event__process_comm,
+ .ordered_samples = true,
+};
+
+static char const *input_name = "perf.data";
+
+static int read_events(void)
+{
+ struct perf_session *session;
+
+ session = perf_session__new(input_name, O_RDONLY, 0, false, &eops);
+ if (!session)
+ die("Initializing perf session failed\n");
+
+ if (!perf_session__has_traces(session, "kvm record"))
+ return -1;
+
+ return perf_session__process_events(session, &eops);
+}
+
+static void verify_vcpu(int vcpu)
+{
+ if (vcpu != -1 && (vcpu > KVM_MAX_VCPUS || vcpu < 0))
+ die("Unknow vcpu:%d.\n", vcpu);
+
+}
+
+static int kvm_events_report(int vcpu)
+{
+ verify_vcpu(vcpu);
+ select_key();
+ register_kvm_events_ops();
+ init_kvm_event_record();
+ setup_pager();
+ read_events();
+ sort_result(vcpu);
+ print_result(vcpu);
+ return 0;
+}
+
+static const char * const record_args[] = {
+ "record",
+ "-a",
+ "-R",
+ "-f",
+ "-m", "1024",
+ "-c", "1",
+ "-e", "kvm:kvm_entry",
+ "-e", "kvm:kvm_exit",
+ "-e", "kvm:kvm_mmio",
+ "-e", "kvm:kvm_mmio_done",
+ "-e", "kvm:kvm_pio"
+};
+
+static int kvm_events_record(int argc, const char **argv)
+{
+ unsigned int rec_argc, i, j;
+ const char **rec_argv;
+
+ rec_argc = ARRAY_SIZE(record_args) + argc - 1;
+ rec_argv = calloc(rec_argc + 1, sizeof(char *));
+
+ if (rec_argv == NULL)
+ return -ENOMEM;
+
+ for (i = 0; i < ARRAY_SIZE(record_args); i++)
+ rec_argv[i] = strdup(record_args[i]);
+
+ for (j = 1; j < (unsigned int)argc; j++, i++)
+ rec_argv[i] = argv[j];
+
+ BUG_ON(i != rec_argc);
+
+ return cmd_record(i, rec_argv, NULL);
+}
+
+static const char * const kvm_events_report_usage[] = {
+ "perf kvm events report [<options>]",
+ NULL
+};
+
+static const struct option kvm_events_report_options[] = {
+ OPT_STRING(0, "event", &report_event, "reprot event",
+ "event for reporting: vmexit, mmio, ioport"),
+ OPT_INTEGER(0, "vcpu", &trace_vcpu,
+ "vcpu id to report"),
+ OPT_STRING('k', "key", &sort_key, "sort-key",
+ "key for sorting: sample(sort by samples number)"
+ " time (sort by time%)"),
+ OPT_END()
+};
+
+static const char * const kvm_events_usage[] = {
+ "perf kvm events [<options>] {record|report}",
+ NULL
+};
+
+static const struct option kvm_events_options[] = {
+ OPT_STRING('i', "input", &input_name, "file", "input file name"),
+ OPT_INCR('v', "verbose", &verbose,
+ "be more verbose (show symbol address, etc)"),
+ OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
+ "dump raw trace in ASCII"),
+ OPT_END()
+};
+
+int cmd_kvm_events(int argc, const char **argv, const char *prefix __used)
+{
+ argc = parse_options(argc, argv, kvm_events_options, kvm_events_usage,
+ PARSE_OPT_STOP_AT_NON_OPTION);
+ if (!argc)
+ usage_with_options(kvm_events_usage, kvm_events_options);
+
+ symbol__init();
+
+ if (!strncmp(argv[0], "rec", 3))
+ return kvm_events_record(argc, argv);
+
+ if (!strncmp(argv[0], "report", 6)) {
+ if (argc) {
+ argc = parse_options(argc, argv,
+ kvm_events_report_options,
+ kvm_events_report_usage, 0);
+ if (argc)
+ usage_with_options(kvm_events_report_usage,
+ kvm_events_report_options);
+ }
+ return kvm_events_report(trace_vcpu);
+ }
+
+ usage_with_options(kvm_events_usage, kvm_events_options);
+ return 0;
+}
diff --git a/tools/perf/builtin.h b/tools/perf/builtin.h
index b382bd5..fb19e3d 100644
--- a/tools/perf/builtin.h
+++ b/tools/perf/builtin.h
@@ -33,6 +33,7 @@ extern int cmd_probe(int argc, const char **argv, const char
*prefix);
extern int cmd_kmem(int argc, const char **argv, const char *prefix);
extern int cmd_lock(int argc, const char **argv, const char *prefix);
extern int cmd_kvm(int argc, const char **argv, const char *prefix);
+extern int cmd_kvm_events(int argc, const char **argv, const char *prefix);
extern int cmd_test(int argc, const char **argv, const char *prefix);
extern int cmd_inject(int argc, const char **argv, const char *prefix);
diff --git a/tools/perf/perf.c b/tools/perf/perf.c
index 2b2e225..ab85ea5 100644
--- a/tools/perf/perf.c
+++ b/tools/perf/perf.c
@@ -317,6 +317,7 @@ static void handle_internal_command(int argc, const char
**argv)
{ "kmem", cmd_kmem, 0 },
{ "lock", cmd_lock, 0 },
{ "kvm", cmd_kvm, 0 },
+ { "kvm-events", cmd_kvm_events, 0},
{ "test", cmd_test, 0 },
{ "inject", cmd_inject, 0 },
};
--
1.7.7.5
--
To unsubscribe from this list: send the line "unsubscribe kvm" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
