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    Subject[RFC][PATCH 1/2] perf: Add 'perf kmem' tool
    This tool is mostly a perf version of kmemtrace-user.

    The following information is provided by this tool:

    - the total amount of memory allocated and fragmentation per call-site
    - the total amount of memory allocated and fragmentation per allocation
    - total memory allocated and fragmentation in the collected dataset
    - ...

    # ./perf kmem record
    ^C
    # ./perf kmem --stat caller --stat alloc -l 10

    ------------------------------------------------------------------------------
    Callsite | Total_alloc/Per | Total_req/Per | Hit | Fragmentation
    ------------------------------------------------------------------------------
    0xc052f37a | 790528/4096 | 790528/4096 | 193 | 0.000%
    0xc0541d70 | 524288/4096 | 524288/4096 | 128 | 0.000%
    0xc051cc68 | 481600/200 | 481600/200 | 2408 | 0.000%
    0xc0572623 | 297444/676 | 297440/676 | 440 | 0.001%
    0xc05399f1 | 73476/164 | 73472/164 | 448 | 0.005%
    0xc05243bf | 51456/256 | 51456/256 | 201 | 0.000%
    0xc0730d0e | 31844/497 | 31808/497 | 64 | 0.113%
    0xc0734c4e | 17152/256 | 17152/256 | 67 | 0.000%
    0xc0541a6d | 16384/128 | 16384/128 | 128 | 0.000%
    0xc059c217 | 13120/40 | 13120/40 | 328 | 0.000%
    0xc0501ee6 | 11264/88 | 11264/88 | 128 | 0.000%
    0xc04daef0 | 7504/682 | 7128/648 | 11 | 5.011%
    0xc04e14a3 | 4216/191 | 4216/191 | 22 | 0.000%
    0xc05041ca | 3524/44 | 3520/44 | 80 | 0.114%
    0xc0734fa3 | 2104/701 | 1620/540 | 3 | 23.004%
    0xc05ec9f1 | 2024/289 | 2016/288 | 7 | 0.395%
    0xc06a1999 | 1792/256 | 1792/256 | 7 | 0.000%
    0xc0463b9a | 1584/144 | 1584/144 | 11 | 0.000%
    0xc0541eb0 | 1024/16 | 1024/16 | 64 | 0.000%
    0xc06a19ac | 896/128 | 896/128 | 7 | 0.000%
    0xc05721c0 | 772/12 | 768/12 | 64 | 0.518%
    0xc054d1e6 | 288/57 | 280/56 | 5 | 2.778%
    0xc04b562e | 157/31 | 154/30 | 5 | 1.911%
    0xc04b536f | 80/16 | 80/16 | 5 | 0.000%
    0xc05855a0 | 64/64 | 36/36 | 1 | 43.750%
    ------------------------------------------------------------------------------

    ------------------------------------------------------------------------------
    Alloc Ptr | Total_alloc/Per | Total_req/Per | Hit | Fragmentation
    ------------------------------------------------------------------------------
    0xda884000 | 1052672/4096 | 1052672/4096 | 257 | 0.000%
    0xda886000 | 262144/4096 | 262144/4096 | 64 | 0.000%
    0xf60c7c00 | 16512/128 | 16512/128 | 129 | 0.000%
    0xf59a4118 | 13120/40 | 13120/40 | 328 | 0.000%
    0xdfd4b2c0 | 11264/88 | 11264/88 | 128 | 0.000%
    0xf5274600 | 7680/256 | 7680/256 | 30 | 0.000%
    0xe8395000 | 5948/594 | 5464/546 | 10 | 8.137%
    0xe59c3c00 | 5748/479 | 5712/476 | 12 | 0.626%
    0xf4cd1a80 | 3524/44 | 3520/44 | 80 | 0.114%
    0xe5bd1600 | 2892/482 | 2856/476 | 6 | 1.245%
    ... | ... | ... | ... | ...
    ------------------------------------------------------------------------------

    SUMMARY
    =======
    Total bytes requested: 2333626
    Total bytes allocated: 2353712
    Total bytes wasted on internal fragmentation: 20086
    Internal fragmentation: 0.853375%


    TODO:
    - show sym+offset in 'callsite' column
    - show cross node allocation stats
    - collect more useful stats?
    - ...

    Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
    ---
    tools/perf/Makefile | 1 +
    tools/perf/builtin-kmem.c | 578 +++++++++++++++++++++++++++++++++++++++++++++
    tools/perf/builtin.h | 1 +
    tools/perf/perf.c | 27 +-
    4 files changed, 594 insertions(+), 13 deletions(-)
    create mode 100644 tools/perf/builtin-kmem.c

    diff --git a/tools/perf/Makefile b/tools/perf/Makefile
    index 53e663a..4ec86da 100644
    --- a/tools/perf/Makefile
    +++ b/tools/perf/Makefile
    @@ -445,6 +445,7 @@ BUILTIN_OBJS += builtin-timechart.o
    BUILTIN_OBJS += builtin-top.o
    BUILTIN_OBJS += builtin-trace.o
    BUILTIN_OBJS += builtin-probe.o
    +BUILTIN_OBJS += builtin-kmem.o

    PERFLIBS = $(LIB_FILE)

    diff --git a/tools/perf/builtin-kmem.c b/tools/perf/builtin-kmem.c
    new file mode 100644
    index 0000000..285fda3
    --- /dev/null
    +++ b/tools/perf/builtin-kmem.c
    @@ -0,0 +1,578 @@
    +#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/data_map.h"
    +
    +#include <linux/rbtree.h>
    +
    +struct alloc_stat;
    +typedef int (*sort_fn_t)(struct alloc_stat *, struct alloc_stat *);
    +
    +static char const *input_name = "perf.data";
    +
    +static struct perf_header *header;
    +static u64 sample_type;
    +
    +static int alloc_flag;
    +static int caller_flag;
    +
    +sort_fn_t alloc_sort_fn;
    +sort_fn_t caller_sort_fn;
    +
    +static int alloc_lines = -1;
    +static int caller_lines = -1;
    +
    +static char *cwd;
    +static int cwdlen;
    +
    +struct alloc_stat {
    + union {
    + struct {
    + char *name;
    + u64 call_site;
    + };
    + u64 ptr;
    + };
    + u64 bytes_req;
    + u64 bytes_alloc;
    + u32 hit;
    +
    + struct rb_node node;
    +};
    +
    +static struct rb_root root_alloc_stat;
    +static struct rb_root root_alloc_sorted;
    +static struct rb_root root_caller_stat;
    +static struct rb_root root_caller_sorted;
    +
    +static unsigned long total_requested, total_allocated;
    +
    +struct raw_event_sample {
    + u32 size;
    + char data[0];
    +};
    +
    +static int
    +process_comm_event(event_t *event, unsigned long offset, unsigned long head)
    +{
    + struct thread *thread = threads__findnew(event->comm.pid);
    +
    + dump_printf("%p [%p]: PERF_RECORD_COMM: %s:%d\n",
    + (void *)(offset + head),
    + (void *)(long)(event->header.size),
    + event->comm.comm, event->comm.pid);
    +
    + if (thread == NULL ||
    + thread__set_comm(thread, event->comm.comm)) {
    + dump_printf("problem processing PERF_RECORD_COMM, skipping event.\n");
    + return -1;
    + }
    +
    + return 0;
    +}
    +
    +static void insert_alloc_stat(unsigned long ptr,
    + int bytes_req, int bytes_alloc)
    +{
    + struct rb_node **node = &root_alloc_stat.rb_node;
    + struct rb_node *parent = NULL;
    + struct alloc_stat *data = NULL;
    +
    + if (!alloc_flag)
    + return;
    +
    + while (*node) {
    + parent = *node;
    + data = rb_entry(*node, struct alloc_stat, node);
    +
    + if (ptr > data->ptr)
    + node = &(*node)->rb_right;
    + else if (ptr < data->ptr)
    + node = &(*node)->rb_left;
    + else
    + break;
    + }
    +
    + if (data && data->ptr == ptr) {
    + data->hit++;
    + data->bytes_req += bytes_req;
    + data->bytes_alloc += bytes_req;
    + } else {
    + data = malloc(sizeof(*data));
    + data->ptr = ptr;
    + data->hit = 1;
    + data->bytes_req = bytes_req;
    + data->bytes_alloc = bytes_alloc;
    +
    + rb_link_node(&data->node, parent, node);
    + rb_insert_color(&data->node, &root_alloc_stat);
    + }
    +}
    +
    +static void insert_caller_stat(unsigned long call_site,
    + int bytes_req, int bytes_alloc)
    +{
    + struct rb_node **node = &root_caller_stat.rb_node;
    + struct rb_node *parent = NULL;
    + struct alloc_stat *data = NULL;
    +
    + if (!caller_flag)
    + return;
    +
    + while (*node) {
    + parent = *node;
    + data = rb_entry(*node, struct alloc_stat, node);
    +
    + if (call_site > data->call_site)
    + node = &(*node)->rb_right;
    + else if (call_site < data->call_site)
    + node = &(*node)->rb_left;
    + else
    + break;
    + }
    +
    + if (data && data->call_site == call_site) {
    + data->hit++;
    + data->bytes_req += bytes_req;
    + data->bytes_alloc += bytes_req;
    + } else {
    + data = malloc(sizeof(*data));
    + data->call_site = call_site;
    + data->hit = 1;
    + data->bytes_req = bytes_req;
    + data->bytes_alloc = bytes_alloc;
    +
    + rb_link_node(&data->node, parent, node);
    + rb_insert_color(&data->node, &root_caller_stat);
    + }
    +}
    +
    +static void process_alloc_event(struct raw_event_sample *raw,
    + struct event *event,
    + int cpu __used,
    + u64 timestamp __used,
    + struct thread *thread __used,
    + int node __used)
    +{
    + unsigned long call_site;
    + unsigned long ptr;
    + int bytes_req;
    + int bytes_alloc;
    +
    + ptr = raw_field_value(event, "ptr", raw->data);
    + call_site = raw_field_value(event, "call_site", raw->data);
    + bytes_req = raw_field_value(event, "bytes_req", raw->data);
    + bytes_alloc = raw_field_value(event, "bytes_alloc", raw->data);
    +
    + insert_alloc_stat(ptr, bytes_req, bytes_alloc);
    + insert_caller_stat(call_site, bytes_req, bytes_alloc);
    +
    + total_requested += bytes_req;
    + total_allocated += bytes_alloc;
    +}
    +
    +static void process_free_event(struct raw_event_sample *raw __used,
    + struct event *event __used,
    + int cpu __used,
    + u64 timestamp __used,
    + struct thread *thread __used)
    +{
    +}
    +
    +static void
    +process_raw_event(event_t *raw_event __used, void *more_data,
    + int cpu, u64 timestamp, struct thread *thread)
    +{
    + struct raw_event_sample *raw = more_data;
    + struct event *event;
    + int type;
    +
    + type = trace_parse_common_type(raw->data);
    + event = trace_find_event(type);
    +
    + if (!strcmp(event->name, "kmalloc") ||
    + !strcmp(event->name, "kmem_cache_alloc")) {
    + process_alloc_event(raw, event, cpu, timestamp, thread, 0);
    + return;
    + }
    +
    + if (!strcmp(event->name, "kmalloc_node") ||
    + !strcmp(event->name, "kmem_cache_alloc_node")) {
    + process_alloc_event(raw, event, cpu, timestamp, thread, 1);
    + return;
    + }
    +
    + if (!strcmp(event->name, "kfree") ||
    + !strcmp(event->name, "kmem_cache_free")) {
    + process_free_event(raw, event, cpu, timestamp, thread);
    + return;
    + }
    +}
    +
    +static int
    +process_sample_event(event_t *event, unsigned long offset, unsigned long head)
    +{
    + u64 ip = event->ip.ip;
    + u64 timestamp = -1;
    + u32 cpu = -1;
    + u64 period = 1;
    + void *more_data = event->ip.__more_data;
    + struct thread *thread = threads__findnew(event->ip.pid);
    +
    + if (sample_type & PERF_SAMPLE_TIME) {
    + timestamp = *(u64 *)more_data;
    + more_data += sizeof(u64);
    + }
    +
    + if (sample_type & PERF_SAMPLE_CPU) {
    + cpu = *(u32 *)more_data;
    + more_data += sizeof(u32);
    + more_data += sizeof(u32); /* reserved */
    + }
    +
    + if (sample_type & PERF_SAMPLE_PERIOD) {
    + period = *(u64 *)more_data;
    + more_data += sizeof(u64);
    + }
    +
    + dump_printf("%p [%p]: PERF_RECORD_SAMPLE (IP, %d): %d/%d: %p period: %Ld\n",
    + (void *)(offset + head),
    + (void *)(long)(event->header.size),
    + event->header.misc,
    + event->ip.pid, event->ip.tid,
    + (void *)(long)ip,
    + (long long)period);
    +
    + if (thread == NULL) {
    + pr_debug("problem processing %d event, skipping it.\n",
    + event->header.type);
    + return -1;
    + }
    +
    + dump_printf(" ... thread: %s:%d\n", thread->comm, thread->pid);
    +
    + process_raw_event(event, more_data, cpu, timestamp, thread);
    +
    + return 0;
    +}
    +
    +static int sample_type_check(u64 type)
    +{
    + sample_type = type;
    +
    + if (!(sample_type & PERF_SAMPLE_RAW)) {
    + fprintf(stderr,
    + "No trace sample to read. Did you call perf record "
    + "without -R?");
    + return -1;
    + }
    +
    + return 0;
    +}
    +
    +static struct perf_file_handler file_handler = {
    + .process_sample_event = process_sample_event,
    + .process_comm_event = process_comm_event,
    + .sample_type_check = sample_type_check,
    +};
    +
    +static int read_events(void)
    +{
    + register_idle_thread();
    + register_perf_file_handler(&file_handler);
    +
    + return mmap_dispatch_perf_file(&header, input_name, 0, 0,
    + &cwdlen, &cwd);
    +}
    +
    +static double fragmentation(unsigned long n_req, unsigned long n_alloc)
    +{
    + if (n_alloc == 0)
    + return 0.0;
    + else
    + return 100.0 - (100.0 * n_req / n_alloc);
    +}
    +
    +static void __print_result(struct rb_root *root, int n_lines, int is_caller)
    +{
    + struct rb_node *next;
    +
    + printf("\n ------------------------------------------------------------------------------\n");
    + if (is_caller)
    + printf(" Callsite |");
    + else
    + printf(" Alloc Ptr |");
    + printf(" Total_alloc/Per | Total_req/Per | Hit | Fragmentation\n");
    + printf(" ------------------------------------------------------------------------------\n");
    +
    + next = rb_first(root);
    +
    + while (next && n_lines--) {
    + struct alloc_stat *data;
    +
    + data = rb_entry(next, struct alloc_stat, node);
    +
    + printf(" %-16p | %8llu/%-6lu | %8llu/%-6lu | %6lu | %8.3f%%\n",
    + is_caller ? (void *)(unsigned long)data->call_site :
    + (void *)(unsigned long)data->ptr,
    + (unsigned long long)data->bytes_alloc,
    + (unsigned long)data->bytes_alloc / data->hit,
    + (unsigned long long)data->bytes_req,
    + (unsigned long)data->bytes_req / data->hit,
    + (unsigned long)data->hit,
    + fragmentation(data->bytes_req, data->bytes_alloc));
    +
    + next = rb_next(next);
    + }
    +
    + if (n_lines == -1)
    + printf(" ... | ... | ... | ... | ... \n");
    +
    + printf(" ------------------------------------------------------------------------------\n");
    +}
    +
    +static void print_summary(void)
    +{
    + printf("\nSUMMARY\n=======\n");
    + printf("Total bytes requested: %lu\n", total_requested);
    + printf("Total bytes allocated: %lu\n", total_allocated);
    + printf("Total bytes wasted on internal fragmentation: %lu\n",
    + total_allocated - total_requested);
    + printf("Internal fragmentation: %f%%\n",
    + fragmentation(total_requested, total_allocated));
    +}
    +
    +static void print_result(void)
    +{
    + if (caller_flag)
    + __print_result(&root_caller_sorted, caller_lines, 1);
    + if (alloc_flag)
    + __print_result(&root_alloc_sorted, alloc_lines, 0);
    + print_summary();
    +}
    +
    +static void sort_insert(struct rb_root *root, struct alloc_stat *data,
    + sort_fn_t sort_fn)
    +{
    + struct rb_node **new = &(root->rb_node);
    + struct rb_node *parent = NULL;
    +
    + while (*new) {
    + struct alloc_stat *this;
    + int cmp;
    +
    + this = rb_entry(*new, struct alloc_stat, node);
    + parent = *new;
    +
    + cmp = sort_fn(data, this);
    +
    + if (cmp > 0)
    + new = &((*new)->rb_left);
    + else
    + new = &((*new)->rb_right);
    + }
    +
    + rb_link_node(&data->node, parent, new);
    + rb_insert_color(&data->node, root);
    +}
    +
    +static void __sort_result(struct rb_root *root, struct rb_root *root_sorted,
    + sort_fn_t sort_fn)
    +{
    + struct rb_node *node;
    + struct alloc_stat *data;
    +
    + for (;;) {
    + node = rb_first(root);
    + if (!node)
    + break;
    +
    + rb_erase(node, root);
    + data = rb_entry(node, struct alloc_stat, node);
    + sort_insert(root_sorted, data, sort_fn);
    + }
    +}
    +
    +static void sort_result(void)
    +{
    + __sort_result(&root_alloc_stat, &root_alloc_sorted, alloc_sort_fn);
    + __sort_result(&root_caller_stat, &root_caller_sorted, caller_sort_fn);
    +}
    +
    +static int __cmd_kmem(void)
    +{
    + setup_pager();
    + read_events();
    + sort_result();
    + print_result();
    +
    + return 0;
    +}
    +
    +static const char * const kmem_usage[] = {
    + "perf kmem [<options>] {record}",
    + NULL
    +};
    +
    +
    +static int ptr_cmp(struct alloc_stat *l, struct alloc_stat *r)
    +{
    + if (l->ptr < r->ptr)
    + return -1;
    + else if (l->ptr > r->ptr)
    + return 1;
    + return 0;
    +}
    +
    +static int callsite_cmp(struct alloc_stat *l, struct alloc_stat *r)
    +{
    + if (l->call_site < r->call_site)
    + return -1;
    + else if (l->call_site > r->call_site)
    + return 1;
    + return 0;
    +}
    +
    +static int bytes_cmp(struct alloc_stat *l, struct alloc_stat *r)
    +{
    + if (l->bytes_alloc < r->bytes_alloc)
    + return -1;
    + else if (l->bytes_alloc > r->bytes_alloc)
    + return 1;
    + return 0;
    +}
    +
    +static int parse_sort_opt(const struct option *opt __used,
    + const char *arg, int unset __used)
    +{
    + sort_fn_t sort_fn;
    +
    + if (!arg)
    + return -1;
    +
    + if (strcmp(arg, "ptr") == 0)
    + sort_fn = ptr_cmp;
    + else if (strcmp(arg, "call_site") == 0)
    + sort_fn = callsite_cmp;
    + else if (strcmp(arg, "bytes") == 0)
    + sort_fn = bytes_cmp;
    + else
    + return -1;
    +
    + if (caller_flag > alloc_flag)
    + caller_sort_fn = sort_fn;
    + else
    + alloc_sort_fn = sort_fn;
    +
    + return 0;
    +}
    +
    +static int parse_stat_opt(const struct option *opt __used,
    + const char *arg, int unset __used)
    +{
    + if (!arg)
    + return -1;
    +
    + if (strcmp(arg, "alloc") == 0)
    + alloc_flag = (caller_flag + 1);
    + else if (strcmp(arg, "caller") == 0)
    + caller_flag = (alloc_flag + 1);
    + else
    + return -1;
    + return 0;
    +}
    +
    +static int parse_line_opt(const struct option *opt __used,
    + const char *arg, int unset __used)
    +{
    + int lines;
    +
    + if (!arg)
    + return -1;
    +
    + lines = strtoul(arg, NULL, 10);
    +
    + if (caller_flag > alloc_flag)
    + caller_lines = lines;
    + else
    + alloc_lines = lines;
    +
    + return 0;
    +}
    +
    +static const struct option kmem_options[] = {
    + OPT_STRING('i', "input", &input_name, "file",
    + "input file name"),
    + OPT_CALLBACK(0, "stat", NULL, "<alloc>|<caller>",
    + "stat selector, Pass 'alloc' or 'caller'.",
    + parse_stat_opt),
    + OPT_CALLBACK('s', "sort", NULL, "key",
    + "sort by key: ptr, call_site, hit, bytes",
    + parse_sort_opt),
    + OPT_CALLBACK('l', "line", NULL, "num",
    + "show n lins",
    + parse_line_opt),
    + OPT_END()
    +};
    +
    +static const char *record_args[] = {
    + "record",
    + "-a",
    + "-R",
    + "-M",
    + "-f",
    + "-c", "1",
    + "-e", "kmem:kmalloc",
    + "-e", "kmem:kmalloc_node",
    + "-e", "kmem:kfree",
    + "-e", "kmem:kmem_cache_alloc",
    + "-e", "kmem:kmem_cache_alloc_node",
    + "-e", "kmem:kmem_cache_free",
    +};
    +
    +static int __cmd_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 *));
    +
    + 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];
    +
    + return cmd_record(i, rec_argv, NULL);
    +}
    +
    +int cmd_kmem(int argc, const char **argv, const char *prefix __used)
    +{
    + symbol__init(0);
    +
    + argc = parse_options(argc, argv, kmem_options, kmem_usage, 0);
    +
    + if (argc && !strncmp(argv[0], "rec", 3))
    + return __cmd_record(argc, argv);
    + else if (argc)
    + usage_with_options(kmem_usage, kmem_options);
    +
    + if (!alloc_sort_fn)
    + alloc_sort_fn = bytes_cmp;
    + if (!caller_sort_fn)
    + caller_sort_fn = bytes_cmp;
    +
    + return __cmd_kmem();
    +}
    +
    diff --git a/tools/perf/builtin.h b/tools/perf/builtin.h
    index 9b02d85..a3d8bf6 100644
    --- a/tools/perf/builtin.h
    +++ b/tools/perf/builtin.h
    @@ -28,5 +28,6 @@ extern int cmd_top(int argc, const char **argv, const char *prefix);
    extern int cmd_trace(int argc, const char **argv, const char *prefix);
    extern int cmd_version(int argc, const char **argv, const char *prefix);
    extern int cmd_probe(int argc, const char **argv, const char *prefix);
    +extern int cmd_kmem(int argc, const char **argv, const char *prefix);

    #endif
    diff --git a/tools/perf/perf.c b/tools/perf/perf.c
    index 89b82ac..cf64049 100644
    --- a/tools/perf/perf.c
    +++ b/tools/perf/perf.c
    @@ -285,20 +285,21 @@ static void handle_internal_command(int argc, const char **argv)
    {
    const char *cmd = argv[0];
    static struct cmd_struct commands[] = {
    - { "help", cmd_help, 0 },
    - { "list", cmd_list, 0 },
    { "buildid-list", cmd_buildid_list, 0 },
    - { "record", cmd_record, 0 },
    - { "report", cmd_report, 0 },
    - { "bench", cmd_bench, 0 },
    - { "stat", cmd_stat, 0 },
    - { "timechart", cmd_timechart, 0 },
    - { "top", cmd_top, 0 },
    - { "annotate", cmd_annotate, 0 },
    - { "version", cmd_version, 0 },
    - { "trace", cmd_trace, 0 },
    - { "sched", cmd_sched, 0 },
    - { "probe", cmd_probe, 0 },
    + { "help", cmd_help, 0 },
    + { "list", cmd_list, 0 },
    + { "record", cmd_record, 0 },
    + { "report", cmd_report, 0 },
    + { "bench", cmd_bench, 0 },
    + { "stat", cmd_stat, 0 },
    + { "timechart", cmd_timechart, 0 },
    + { "top", cmd_top, 0 },
    + { "annotate", cmd_annotate, 0 },
    + { "version", cmd_version, 0 },
    + { "trace", cmd_trace, 0 },
    + { "sched", cmd_sched, 0 },
    + { "probe", cmd_probe, 0 },
    + { "kmem", cmd_kmem, 0 },
    };
    unsigned int i;
    static const char ext[] = STRIP_EXTENSION;
    --
    1.6.3


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