diff options
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/perf/Documentation/perf-kvm.txt | 30 | ||||
| -rw-r--r-- | tools/perf/MANIFEST | 3 | ||||
| -rw-r--r-- | tools/perf/builtin-kvm.c | 840 | ||||
| -rw-r--r-- | tools/perf/util/header.c | 59 | ||||
| -rw-r--r-- | tools/perf/util/header.h | 1 | ||||
| -rw-r--r-- | tools/perf/util/thread.h | 2 |
6 files changed, 929 insertions, 6 deletions
diff --git a/tools/perf/Documentation/perf-kvm.txt b/tools/perf/Documentation/perf-kvm.txt index dd84cb2f0a88..326f2cb333cb 100644 --- a/tools/perf/Documentation/perf-kvm.txt +++ b/tools/perf/Documentation/perf-kvm.txt @@ -12,7 +12,7 @@ SYNOPSIS [--guestkallsyms=<path> --guestmodules=<path> | --guestvmlinux=<path>]] {top|record|report|diff|buildid-list} 'perf kvm' [--host] [--guest] [--guestkallsyms=<path> --guestmodules=<path> - | --guestvmlinux=<path>] {top|record|report|diff|buildid-list} + | --guestvmlinux=<path>] {top|record|report|diff|buildid-list|stat} DESCRIPTION ----------- @@ -38,6 +38,18 @@ There are a couple of variants of perf kvm: so that other tools can be used to fetch packages with matching symbol tables for use by perf report. + 'perf kvm stat <command>' to run a command and gather performance counter + statistics. + Especially, perf 'kvm stat record/report' generates a statistical analysis + of KVM events. Currently, vmexit, mmio and ioport events are supported. + 'perf kvm stat record <command>' records kvm events and the events between + start and end <command>. + And this command produces a file which contains tracing results of kvm + events. + + 'perf kvm stat report' reports statistical data which includes events + handled time, samples, and so on. + OPTIONS ------- -i:: @@ -68,7 +80,21 @@ OPTIONS --guestvmlinux=<path>:: Guest os kernel vmlinux. +STAT REPORT OPTIONS +------------------- +--vcpu=<value>:: + analyze events which occures on this vcpu. (default: all vcpus) + +--events=<value>:: + events to be analyzed. Possible values: vmexit, mmio, ioport. + (default: vmexit) +-k:: +--key=<value>:: + Sorting key. Possible values: sample (default, sort by samples + number), time (sort by average time). + SEE ALSO -------- linkperf:perf-top[1], linkperf:perf-record[1], linkperf:perf-report[1], -linkperf:perf-diff[1], linkperf:perf-buildid-list[1] +linkperf:perf-diff[1], linkperf:perf-buildid-list[1], +linkperf:perf-stat[1] diff --git a/tools/perf/MANIFEST b/tools/perf/MANIFEST index 051807990938..80db3f4bcf7a 100644 --- a/tools/perf/MANIFEST +++ b/tools/perf/MANIFEST @@ -16,3 +16,6 @@ arch/*/lib/memset*.S include/linux/poison.h include/linux/magic.h include/linux/hw_breakpoint.h +arch/x86/include/asm/svm.h +arch/x86/include/asm/vmx.h +arch/x86/include/asm/kvm_host.h diff --git a/tools/perf/builtin-kvm.c b/tools/perf/builtin-kvm.c index 4d2aa2cbeca8..1878947df5c1 100644 --- a/tools/perf/builtin-kvm.c +++ b/tools/perf/builtin-kvm.c @@ -1,6 +1,7 @@ #include "builtin.h" #include "perf.h" +#include "util/evsel.h" #include "util/util.h" #include "util/cache.h" #include "util/symbol.h" @@ -10,8 +11,10 @@ #include "util/parse-options.h" #include "util/trace-event.h" - #include "util/debug.h" +#include "util/debugfs.h" +#include "util/tool.h" +#include "util/stat.h" #include <sys/prctl.h> @@ -19,11 +22,840 @@ #include <pthread.h> #include <math.h> -static const char *file_name; +#include "../../arch/x86/include/asm/svm.h" +#include "../../arch/x86/include/asm/vmx.h" +#include "../../arch/x86/include/asm/kvm.h" + +struct event_key { + #define INVALID_KEY (~0ULL) + u64 key; + int info; +}; + +struct kvm_events_ops { + bool (*is_begin_event)(struct event_format *event, void *data, + struct event_key *key); + bool (*is_end_event)(struct event_format *event, void *data, + struct event_key *key); + void (*decode_key)(struct event_key *key, char decode[20]); + const char *name; +}; + +static void exit_event_get_key(struct event_format *event, void *data, + struct event_key *key) +{ + key->info = 0; + key->key = raw_field_value(event, "exit_reason", data); +} + +static bool kvm_exit_event(struct event_format *event) +{ + return !strcmp(event->name, "kvm_exit"); +} + +static bool exit_event_begin(struct event_format *event, void *data, + struct event_key *key) +{ + if (kvm_exit_event(event)) { + exit_event_get_key(event, data, key); + return true; + } + + return false; +} + +static bool kvm_entry_event(struct event_format *event) +{ + return !strcmp(event->name, "kvm_entry"); +} + +static bool exit_event_end(struct event_format *event, void *data __maybe_unused, + struct event_key *key __maybe_unused) +{ + return kvm_entry_event(event); +} + +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 int cpu_isa; + +static const char *get_exit_reason(u64 exit_code) +{ + int table_size = ARRAY_SIZE(svm_exit_reasons); + struct exit_reasons_table *table = svm_exit_reasons; + + if (cpu_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++; + } + + pr_err("unknown kvm exit code:%lld on %s\n", + (unsigned long long)exit_code, cpu_isa ? "VMX" : "SVM"); + return "UNKNOWN"; +} + +static void exit_event_decode_key(struct event_key *key, char decode[20]) +{ + const char *exit_reason = get_exit_reason(key->key); + + scnprintf(decode, 20, "%s", exit_reason); +} + +static struct kvm_events_ops exit_events = { + .is_begin_event = exit_event_begin, + .is_end_event = exit_event_end, + .decode_key = exit_event_decode_key, + .name = "VM-EXIT" +}; + + /* + * For the mmio events, we treat: + * the time of MMIO write: kvm_mmio(KVM_TRACE_MMIO_WRITE...) -> kvm_entry + * the time of MMIO read: kvm_exit -> kvm_mmio(KVM_TRACE_MMIO_READ...). + */ +static void mmio_event_get_key(struct event_format *event, void *data, + struct event_key *key) +{ + key->key = raw_field_value(event, "gpa", data); + key->info = raw_field_value(event, "type", data); +} + +#define KVM_TRACE_MMIO_READ_UNSATISFIED 0 +#define KVM_TRACE_MMIO_READ 1 +#define KVM_TRACE_MMIO_WRITE 2 + +static bool mmio_event_begin(struct event_format *event, void *data, + struct event_key *key) +{ + /* MMIO read begin event in kernel. */ + if (kvm_exit_event(event)) + return true; + + /* MMIO write begin event in kernel. */ + if (!strcmp(event->name, "kvm_mmio") && + raw_field_value(event, "type", data) == KVM_TRACE_MMIO_WRITE) { + mmio_event_get_key(event, data, key); + return true; + } + + return false; +} + +static bool mmio_event_end(struct event_format *event, void *data, + struct event_key *key) +{ + /* MMIO write end event in kernel. */ + if (kvm_entry_event(event)) + return true; + + /* MMIO read end event in kernel.*/ + if (!strcmp(event->name, "kvm_mmio") && + raw_field_value(event, "type", data) == KVM_TRACE_MMIO_READ) { + mmio_event_get_key(event, data, key); + return true; + } + + return false; +} + +static void mmio_event_decode_key(struct event_key *key, char decode[20]) +{ + scnprintf(decode, 20, "%#lx:%s", (unsigned long)key->key, + key->info == KVM_TRACE_MMIO_WRITE ? "W" : "R"); +} + +static struct kvm_events_ops mmio_events = { + .is_begin_event = mmio_event_begin, + .is_end_event = mmio_event_end, + .decode_key = mmio_event_decode_key, + .name = "MMIO Access" +}; + + /* The time of emulation pio access is from kvm_pio to kvm_entry. */ +static void ioport_event_get_key(struct event_format *event, void *data, + struct event_key *key) +{ + key->key = raw_field_value(event, "port", data); + key->info = raw_field_value(event, "rw", data); +} + +static bool ioport_event_begin(struct event_format *event, void *data, + struct event_key *key) +{ + if (!strcmp(event->name, "kvm_pio")) { + ioport_event_get_key(event, data, key); + return true; + } + + return false; +} + +static bool ioport_event_end(struct event_format *event, void *data __maybe_unused, + struct event_key *key __maybe_unused) +{ + if (kvm_entry_event(event)) + return true; + + return false; +} + +static void ioport_event_decode_key(struct event_key *key, char decode[20]) +{ + scnprintf(decode, 20, "%#llx:%s", (unsigned long long)key->key, + key->info ? "POUT" : "PIN"); +} + +static struct kvm_events_ops ioport_events = { + .is_begin_event = ioport_event_begin, + .is_end_event = ioport_event_end, + .decode_key = ioport_event_decode_key, + .name = "IO Port Access" +}; + +static const char *report_event = "vmexit"; +struct kvm_events_ops *events_ops; + +static bool register_kvm_events_ops(void) +{ + bool ret = true; + + 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 { + pr_err("Unknown report event:%s\n", report_event); + ret = false; + } + + return ret; +} + +struct kvm_event_stats { + u64 time; + struct stats stats; +}; + +struct kvm_event { + struct list_head hash_entry; + struct rb_node rb; + + struct event_key key; + + struct kvm_event_stats total; + + #define DEFAULT_VCPU_NUM 8 + int max_vcpu; + struct kvm_event_stats *vcpu; +}; + +struct vcpu_event_record { + int vcpu_id; + u64 start_time; + struct kvm_event *last_event; +}; + +#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 < (int)EVENTS_CACHE_SIZE; i++) + INIT_LIST_HEAD(&kvm_events_cache[i]); +} + +static int kvm_events_hash_fn(u64 key) +{ + return key & (EVENTS_CACHE_SIZE - 1); +} + +static bool kvm_event_expand(struct kvm_event *event, int vcpu_id) +{ + int old_max_vcpu = event->max_vcpu; + + if (vcpu_id < event->max_vcpu) + return true; + + while (event->max_vcpu <= vcpu_id) + event->max_vcpu += DEFAULT_VCPU_NUM; + + event->vcpu = realloc(event->vcpu, + event->max_vcpu * sizeof(*event->vcpu)); + if (!event->vcpu) { + pr_err("Not enough memory\n"); + return false; + } + + memset(event->vcpu + old_max_vcpu, 0, + (event->max_vcpu - old_max_vcpu) * sizeof(*event->vcpu)); + return true; +} + +static struct kvm_event *kvm_alloc_init_event(struct event_key *key) +{ + struct kvm_event *event; + + event = zalloc(sizeof(*event)); + if (!event) { + pr_err("Not enough memory\n"); + return NULL; + } + + event->key = *key; + return event; +} + +static struct kvm_event *find_create_kvm_event(struct event_key *key) +{ + struct kvm_event *event; + struct list_head *head; + + BUG_ON(key->key == INVALID_KEY); + + 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 = kvm_alloc_init_event(key); + if (!event) + return NULL; + + list_add(&event->hash_entry, head); + return event; +} + +static bool handle_begin_event(struct vcpu_event_record *vcpu_record, + struct event_key *key, u64 timestamp) +{ + struct kvm_event *event = NULL; + + if (key->key != INVALID_KEY) + event = find_create_kvm_event(key); + + vcpu_record->last_event = event; + vcpu_record->start_time = timestamp; + return true; +} + +static void +kvm_update_event_stats(struct kvm_event_stats *kvm_stats, u64 time_diff) +{ + kvm_stats->time += time_diff; + update_stats(&kvm_stats->stats, time_diff); +} + +static double kvm_event_rel_stddev(int vcpu_id, struct kvm_event *event) +{ + struct kvm_event_stats *kvm_stats = &event->total; + + if (vcpu_id != -1) + kvm_stats = &event->vcpu[vcpu_id]; + + return rel_stddev_stats(stddev_stats(&kvm_stats->stats), + avg_stats(&kvm_stats->stats)); +} + +static bool update_kvm_event(struct kvm_event *event, int vcpu_id, + u64 time_diff) +{ + kvm_update_event_stats(&event->total, time_diff); + + if (!kvm_event_expand(event, vcpu_id)) + return false; + + kvm_update_event_stats(&event->vcpu[vcpu_id], time_diff); + return true; +} + +static bool handle_end_event(struct vcpu_event_record *vcpu_record, + struct event_key *key, u64 timestamp) +{ + struct kvm_event *event; + u64 time_begin, time_diff; + + event = vcpu_record->last_event; + time_begin = vcpu_record->start_time; + + /* The begin event is not caught. */ + if (!time_begin) + return true; + + /* + * In some case, the 'begin event' only records the start timestamp, + * the actual event is recognized in the 'end event' (e.g. mmio-event). + */ + + /* Both begin and end events did not get the key. */ + if (!event && key->key == INVALID_KEY) + return true; + + if (!event) + event = find_create_kvm_event(key); + + if (!event) + return false; + + vcpu_record->last_event = NULL; + vcpu_record->start_time = 0; + + BUG_ON(timestamp < time_begin); + + time_diff = timestamp - time_begin; + return update_kvm_event(event, vcpu_record->vcpu_id, time_diff); +} + +static struct vcpu_event_record +*per_vcpu_record(struct thread *thread, struct event_format *event, void *data) +{ + /* Only kvm_entry records vcpu id. */ + if (!thread->priv && kvm_entry_event(event)) { + struct vcpu_event_record *vcpu_record; + + vcpu_record = zalloc(sizeof(struct vcpu_event_record)); + if (!vcpu_record) { + pr_err("Not enough memory\n"); + return NULL; + } + + vcpu_record->vcpu_id = raw_field_value(event, "vcpu_id", data); + thread->priv = vcpu_record; + } + + return (struct vcpu_event_record *)thread->priv; +} + +static bool handle_kvm_event(struct thread *thread, struct event_format *event, + void *data, u64 timestamp) +{ + struct vcpu_event_record *vcpu_record; + struct event_key key = {.key = INVALID_KEY}; + + vcpu_record = per_vcpu_record(thread, event, data); + if (!vcpu_record) + return true; + + if (events_ops->is_begin_event(event, data, &key)) + return handle_begin_event(vcpu_record, &key, timestamp); + + if (events_ops->is_end_event(event, data, &key)) + return handle_end_event(vcpu_record, &key, timestamp); + + return true; +} + +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 GET_EVENT_KEY(func, field) \ +static u64 get_event_ ##func(struct kvm_event *event, int vcpu) \ +{ \ + if (vcpu == -1) \ + return event->total.field; \ + \ + if (vcpu >= event->max_vcpu) \ + return 0; \ + \ + return event->vcpu[vcpu].field; \ +} + +#define COMPARE_EVENT_KEY(func, field) \ +GET_EVENT_KEY(func, field) \ +static int compare_kvm_event_ ## func(struct kvm_event *one, \ + struct kvm_event *two, int vcpu)\ +{ \ + return get_event_ ##func(one, vcpu) > \ + get_event_ ##func(two, vcpu); \ +} + +GET_EVENT_KEY(time, time); +COMPARE_EVENT_KEY(count, stats.n); +COMPARE_EVENT_KEY(mean, stats.mean); + +#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, mean), + { NULL, NULL } +}; + +static const char *sort_key = "sample"; +static key_cmp_fun compare; + +static bool select_key(void) +{ + int i; + + for (i = 0; keys[i].name; i++) { + if (!strcmp(keys[i].name, sort_key)) { + compare = keys[i].key; + return true; + } + } + + pr_err("Unknown compare key:%s\n", sort_key); + return false; +} + +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 = rb_first(&result); + + if (!node) + return NULL; + + 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("%9s ", "Samples%"); + + pr_info("%9s ", "Time%"); + pr_info("%16s ", "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("%10llu ", (unsigned long long)ecount); + pr_info("%8.2f%% ", (double)ecount / total_count * 100); + pr_info("%8.2f%% ", (double)etime / total_time * 100); + pr_info("%9.2fus ( +-%7.2f%% )", (double)etime / ecount/1e3, + kvm_event_rel_stddev(vcpu, event)); + pr_info("\n"); + } + + pr_info("\nTotal Samples:%lld, Total events handled time:%.2fus.\n\n", + (unsigned long long)total_count, total_time / 1e3); +} + +static int process_sample_event(struct perf_tool *tool __maybe_unused, + union perf_event *event, + struct perf_sample *sample, + struct perf_evsel *evsel, + 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; + } + + if (!handle_kvm_event(thread, evsel->tp_format, sample->raw_data, + sample->time)) + return -1; + + return 0; +} + +static struct perf_tool eops = { + .sample = process_sample_event, + .comm = perf_event__process_comm, + .ordered_samples = true, +}; + +static int get_cpu_isa(struct perf_session *session) +{ + char *cpuid; + int isa; + + cpuid = perf_header__read_feature(session, HEADER_CPUID); + + if (!cpuid) { + pr_err("read HEADER_CPUID failed.\n"); + return -ENOTSUP; + } + + if (strstr(cpuid, "Intel")) + isa = 1; + else if (strstr(cpuid, "AMD")) + isa = 0; + else { + pr_err("CPU %s is not supported.\n", cpuid); + isa = -ENOTSUP; + } + + free(cpuid); + return isa; +} + +static const char *file_name; + +static int read_events(void) +{ + struct perf_session *kvm_session; + int ret; + + kvm_session = perf_session__new(file_name, O_RDONLY, 0, false, &eops); + if (!kvm_session) { + pr_err("Initializing perf session failed\n"); + return -EINVAL; + } + + if (!perf_session__has_traces(kvm_session, "kvm record")) + return -EINVAL; + + /* + * Do not use 'isa' recorded in kvm_exit tracepoint since it is not + * traced in the old kernel. + */ + ret = get_cpu_isa(kvm_session); + + if (ret < 0) + return ret; + + cpu_isa = ret; + + return perf_session__process_events(kvm_session, &eops); +} + +static bool verify_vcpu(int vcpu) +{ + if (vcpu != -1 && vcpu < 0) { + pr_err("Invalid vcpu:%d.\n", vcpu); + return false; + } + + return true; +} + +static int kvm_events_report_vcpu(int vcpu) +{ + int ret = -EINVAL; + + if (!verify_vcpu(vcpu)) + goto exit; + + if (!select_key()) + goto exit; + + if (!register_kvm_events_ops()) + goto exit; + + init_kvm_event_record(); + setup_pager(); + + ret = read_events(); + if (ret) + goto exit; + + sort_result(vcpu); + print_result(vcpu); +exit: + return ret; +} + +static const char * const record_args[] = { + "record", + "-R", + "-f", + "-m", "1024", + "-c", "1", + "-e", "kvm:kvm_entry", + "-e", "kvm:kvm_exit", + "-e", "kvm:kvm_mmio", + "-e", "kvm:kvm_pio", +}; + +#define STRDUP_FAIL_EXIT(s) \ + ({ char *_p; \ + _p = strdup(s); \ + if (!_p) \ + return -ENOMEM; \ + _p; \ + }) + +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 + 2; + 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_FAIL_EXIT(record_args[i]); + + rec_argv[i++] = STRDUP_FAIL_EXIT("-o"); + rec_argv[i++] = STRDUP_FAIL_EXIT(file_name); + + for (j = 1; j < (unsigned int)argc; j++, i++) + rec_argv[i] = argv[j]; + + return cmd_record(i, rec_argv, NULL); +} + +static const char * const kvm_events_report_usage[] = { + "perf kvm stat report [<options>]", + NULL +}; + +static const struct option kvm_events_report_options[] = { + OPT_STRING(0, "event", &report_event, "report 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 avg time)"), + OPT_END() +}; + +static int kvm_events_report(int argc, const char **argv) +{ + symbol__init(); + + 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_vcpu(trace_vcpu); +} + +static void print_kvm_stat_usage(void) +{ + printf("Usage: perf kvm stat <command>\n\n"); + + printf("# Available commands:\n"); + printf("\trecord: record kvm events\n"); + printf("\treport: report statistical data of kvm events\n"); + + printf("\nOtherwise, it is the alias of 'perf stat':\n"); +} + +static int kvm_cmd_stat(int argc, const char **argv) +{ + if (argc == 1) { + print_kvm_stat_usage(); + goto perf_stat; + } + + if (!strncmp(argv[1], "rec", 3)) + return kvm_events_record(argc - 1, argv + 1); + + if (!strncmp(argv[1], "rep", 3)) + return kvm_events_report(argc - 1 , argv + 1); + +perf_stat: + return cmd_stat(argc, argv, NULL); +} + static char name_buffer[256]; static const char * const kvm_usage[] = { - "perf kvm [<options>] {top|record|report|diff|buildid-list}", + "perf kvm [<options>] {top|record|report|diff|buildid-list|stat}", NULL }; @@ -135,6 +967,8 @@ int cmd_kvm(int argc, const char **argv, const char *prefix __maybe_unused) return cmd_top(argc, argv, NULL); else if (!strncmp(argv[0], "buildid-list", 12)) return __cmd_buildid_list(argc, argv); + else if (!strncmp(argv[0], "stat", 4)) + return kvm_cmd_stat(argc, argv); else usage_with_options(kvm_usage, kvm_options); diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c index acbf6336199e..ad72b2814ba8 100644 --- a/tools/perf/util/header.c +++ b/tools/perf/util/header.c @@ -1673,6 +1673,11 @@ static int process_build_id(struct perf_file_section *section, return 0; } +static char *read_cpuid(struct perf_header *ph, int fd) +{ + return do_read_string(fd, ph); +} + static struct perf_evsel * perf_evlist__find_by_index(struct perf_evlist *evlist, int idx) { @@ -1726,6 +1731,7 @@ process_event_desc(struct perf_file_section *section __maybe_unused, struct feature_ops { int (*write)(int fd, struct perf_header *h, struct perf_evlist *evlist); void (*print)(struct perf_header *h, int fd, FILE *fp); + char *(*read)(struct perf_header *h, int fd); int (*process)(struct perf_file_section *section, struct perf_header *h, int feat, int fd, void *data); const char *name; @@ -1740,6 +1746,9 @@ struct feature_ops { #define FEAT_OPF(n, func) \ [n] = { .name = #n, .write = write_##func, .print = print_##func, \ .full_only = true } +#define FEAT_OPA_R(n, func) \ + [n] = { .name = #n, .write = write_##func, .print = print_##func, \ + .read = read_##func } /* feature_ops not implemented: */ #define print_tracing_data NULL @@ -1754,7 +1763,7 @@ static const struct feature_ops feat_ops[HEADER_LAST_FEATURE] = { FEAT_OPA(HEADER_ARCH, arch), FEAT_OPA(HEADER_NRCPUS, nrcpus), FEAT_OPA(HEADER_CPUDESC, cpudesc), - FEAT_OPA(HEADER_CPUID, cpuid), + FEAT_OPA_R(HEADER_CPUID, cpuid), FEAT_OPA(HEADER_TOTAL_MEM, total_mem), FEAT_OPP(HEADER_EVENT_DESC, event_desc), FEAT_OPA(HEADER_CMDLINE, cmdline), @@ -1809,6 +1818,54 @@ int perf_header__fprintf_info(struct perf_session *session, FILE *fp, bool full) return 0; } +struct header_read_data { + int feat; + char *result; +}; + +static int perf_file_section__read_feature(struct perf_file_section *section, + struct perf_header *ph, + int feat, int fd, void *data) +{ + struct header_read_data *hd = data; + + if (feat != hd->feat) + return 0; + + if (lseek(fd, section->offset, SEEK_SET) == (off_t)-1) { + pr_debug("Failed to lseek to %" PRIu64 " offset for feature " + "%d, continuing...\n", section->offset, feat); + return 0; + } + + if (feat >= HEADER_LAST_FEATURE) { + pr_warning("unknown feature %d\n", feat); + return 0; + } + + if (!feat_ops[feat].read) { + pr_warning("read is not supported for feature %d\n", feat); + return 0; + } + + hd->result = feat_ops[feat].read(ph, fd); + return 0; +} + +char *perf_header__read_feature(struct perf_session *session, int feat) +{ + struct perf_header *header = &session->header; + struct header_read_data hd; + int fd = session->fd; + + hd.feat = feat; + hd.result = NULL; + + perf_header__process_sections(header, fd, &hd, + perf_file_section__read_feature); + return hd.result; +} + static int do_write_feat(int fd, struct perf_header *h, int type, struct perf_file_section **p, struct perf_evlist *evlist) diff --git a/tools/perf/util/header.h b/tools/perf/util/header.h index 209dad4fee2b..58de08b21bce 100644 --- a/tools/perf/util/header.h +++ b/tools/perf/util/header.h @@ -94,6 +94,7 @@ int perf_header__process_sections(struct perf_header *header, int fd, int feat, int fd, void *data)); int perf_header__fprintf_info(struct perf_session *s, FILE *fp, bool full); +char *perf_header__read_feature(struct perf_session *session, int feat); int build_id_cache__add_s(const char *sbuild_id, const char *debugdir, const char *name, bool is_kallsyms, bool is_vdso); diff --git a/tools/perf/util/thread.h b/tools/perf/util/thread.h index 70c2c13ff679..f66610b7bacf 100644 --- a/tools/perf/util/thread.h +++ b/tools/perf/util/thread.h @@ -16,6 +16,8 @@ struct thread { bool comm_set; char *comm; int comm_len; + + void *priv; }; struct machine; |