diff options
| -rw-r--r-- | Documentation/perf_counter/perf-report.cc | 515 |
1 files changed, 0 insertions, 515 deletions
diff --git a/Documentation/perf_counter/perf-report.cc b/Documentation/perf_counter/perf-report.cc deleted file mode 100644 index 8855107fe6b3..000000000000 --- a/Documentation/perf_counter/perf-report.cc +++ /dev/null @@ -1,515 +0,0 @@ -#define _GNU_SOURCE -#include <sys/types.h> -#include <sys/stat.h> -#include <sys/time.h> -#include <unistd.h> -#include <stdint.h> -#include <stdlib.h> -#include <string.h> -#include <limits.h> -#include <fcntl.h> -#include <stdio.h> -#include <errno.h> -#include <ctype.h> -#include <time.h> -#include <getopt.h> -#include <assert.h> - -#include <sys/ioctl.h> -#include <sys/poll.h> -#include <sys/prctl.h> -#include <sys/wait.h> -#include <sys/mman.h> -#include <sys/types.h> -#include <sys/stat.h> - -#include <linux/unistd.h> -#include <linux/types.h> - -#include "../../include/linux/perf_counter.h" - -#include <set> -#include <map> -#include <string> - - -#define SHOW_KERNEL 1 -#define SHOW_USER 2 -#define SHOW_HV 4 - -static char const *input_name = "output.perf"; -static int input; -static int show_mask = SHOW_KERNEL | SHOW_USER | SHOW_HV; - -static unsigned long page_size; -static unsigned long mmap_window = 32; - -struct ip_event { - struct perf_event_header header; - __u64 ip; - __u32 pid, tid; -}; -struct mmap_event { - struct perf_event_header header; - __u32 pid, tid; - __u64 start; - __u64 len; - __u64 pgoff; - char filename[PATH_MAX]; -}; -struct comm_event { - struct perf_event_header header; - __u32 pid,tid; - char comm[16]; -}; - -typedef union event_union { - struct perf_event_header header; - struct ip_event ip; - struct mmap_event mmap; - struct comm_event comm; -} event_t; - -struct section { - uint64_t start; - uint64_t end; - - uint64_t offset; - - std::string name; - - section() { }; - - section(uint64_t stab) : end(stab) { }; - - section(uint64_t start, uint64_t size, uint64_t offset, std::string name) : - start(start), end(start + size), offset(offset), name(name) - { }; - - bool operator < (const struct section &s) const { - return end < s.end; - }; -}; - -typedef std::set<struct section> sections_t; - -struct symbol { - uint64_t start; - uint64_t end; - - std::string name; - - symbol() { }; - - symbol(uint64_t ip) : start(ip) { } - - symbol(uint64_t start, uint64_t len, std::string name) : - start(start), end(start + len), name(name) - { }; - - bool operator < (const struct symbol &s) const { - return start < s.start; - }; -}; - -typedef std::set<struct symbol> symbols_t; - -struct dso { - sections_t sections; - symbols_t syms; -}; - -static std::map<std::string, struct dso> dsos; - -static void load_dso_sections(std::string dso_name) -{ - struct dso &dso = dsos[dso_name]; - - std::string cmd = "readelf -DSW " + dso_name; - - FILE *file = popen(cmd.c_str(), "r"); - if (!file) { - perror("failed to open pipe"); - exit(-1); - } - - char *line = NULL; - size_t n = 0; - - while (!feof(file)) { - uint64_t addr, off, size; - char name[32]; - - if (getline(&line, &n, file) < 0) - break; - if (!line) - break; - - if (sscanf(line, " [%*2d] %16s %*14s %Lx %Lx %Lx", - name, &addr, &off, &size) == 4) { - - dso.sections.insert(section(addr, size, addr - off, name)); - } -#if 0 - /* - * for reading readelf symbols (-s), however these don't seem - * to include nearly everything, so use nm for that. - */ - if (sscanf(line, " %*4d %*3d: %Lx %5Lu %*7s %*6s %*7s %3d %s", - &start, &size, §ion, sym) == 4) { - - start -= dso.section_offsets[section]; - - dso.syms.insert(symbol(start, size, std::string(sym))); - } -#endif - } - pclose(file); -} - -static void load_dso_symbols(std::string dso_name, std::string args) -{ - struct dso &dso = dsos[dso_name]; - - std::string cmd = "nm -nSC " + args + " " + dso_name; - - FILE *file = popen(cmd.c_str(), "r"); - if (!file) { - perror("failed to open pipe"); - exit(-1); - } - - char *line = NULL; - size_t n = 0; - - while (!feof(file)) { - uint64_t start, size; - char c; - char sym[1024]; - - if (getline(&line, &n, file) < 0) - break; - if (!line) - break; - - - if (sscanf(line, "%Lx %Lx %c %s", &start, &size, &c, sym) == 4) { - sections_t::const_iterator si = - dso.sections.upper_bound(section(start)); - if (si == dso.sections.end()) { - printf("symbol in unknown section: %s\n", sym); - continue; - } - - start -= si->offset; - - dso.syms.insert(symbol(start, size, sym)); - } - } - pclose(file); -} - -static void load_dso(std::string dso_name) -{ - load_dso_sections(dso_name); - load_dso_symbols(dso_name, "-D"); /* dynamic symbols */ - load_dso_symbols(dso_name, ""); /* regular ones */ -} - -void load_kallsyms(void) -{ - struct dso &dso = dsos["[kernel]"]; - - FILE *file = fopen("/proc/kallsyms", "r"); - if (!file) { - perror("failed to open kallsyms"); - exit(-1); - } - - char *line; - size_t n; - - while (!feof(file)) { - uint64_t start; - char c; - char sym[1024000]; - - if (getline(&line, &n, file) < 0) - break; - if (!line) - break; - - if (sscanf(line, "%Lx %c %s", &start, &c, sym) == 3) - dso.syms.insert(symbol(start, 0x1000000, std::string(sym))); - } - fclose(file); -} - -struct map { - uint64_t start; - uint64_t end; - uint64_t pgoff; - - std::string dso; - - map() { }; - - map(uint64_t ip) : end(ip) { } - - map(mmap_event *mmap) { - start = mmap->start; - end = mmap->start + mmap->len; - pgoff = mmap->pgoff; - - dso = std::string(mmap->filename); - - if (dsos.find(dso) == dsos.end()) - load_dso(dso); - }; - - bool operator < (const struct map &m) const { - return end < m.end; - }; -}; - -typedef std::set<struct map> maps_t; - -static std::map<int, maps_t> maps; - -static std::map<int, std::string> comms; - -static std::map<std::string, int> hist; -static std::multimap<int, std::string> rev_hist; - -static std::string resolve_comm(int pid) -{ - std::string comm; - - std::map<int, std::string>::const_iterator ci = comms.find(pid); - if (ci != comms.end()) { - comm = ci->second; - } else { - char pid_str[30]; - - sprintf(pid_str, ":%d", pid); - comm = pid_str; - } - - return comm; -} - -static std::string resolve_user_symbol(int pid, uint64_t ip) -{ - std::string sym = "<unknown>"; - - maps_t &m = maps[pid]; - maps_t::const_iterator mi = m.upper_bound(map(ip)); - if (mi == m.end()) - return sym; - - ip -= mi->start + mi->pgoff; - - symbols_t &s = dsos[mi->dso].syms; - symbols_t::const_iterator si = s.upper_bound(symbol(ip)); - - sym = mi->dso + ": <unknown>"; - - if (si == s.begin()) - return sym; - si--; - - if (si->start <= ip && ip < si->end) - sym = mi->dso + ": " + si->name; -#if 0 - else if (si->start <= ip) - sym = mi->dso + ": ?" + si->name; -#endif - - return sym; -} - -static std::string resolve_kernel_symbol(uint64_t ip) -{ - std::string sym = "<unknown>"; - - symbols_t &s = dsos["[kernel]"].syms; - symbols_t::const_iterator si = s.upper_bound(symbol(ip)); - - if (si == s.begin()) - return sym; - si--; - - if (si->start <= ip && ip < si->end) - sym = si->name; - - return sym; -} - -static void display_help(void) -{ - printf( - "Usage: perf-report [<options>]\n" - " -i file --input=<file> # input file\n" - ); - - exit(0); -} - -static void process_options(int argc, char *argv[]) -{ - int error = 0; - - for (;;) { - int option_index = 0; - /** Options for getopt */ - static struct option long_options[] = { - {"input", required_argument, NULL, 'i'}, - {"no-user", no_argument, NULL, 'u'}, - {"no-kernel", no_argument, NULL, 'k'}, - {"no-hv", no_argument, NULL, 'h'}, - {NULL, 0, NULL, 0 } - }; - int c = getopt_long(argc, argv, "+:i:kuh", - long_options, &option_index); - if (c == -1) - break; - - switch (c) { - case 'i': input_name = strdup(optarg); break; - case 'k': show_mask &= ~SHOW_KERNEL; break; - case 'u': show_mask &= ~SHOW_USER; break; - case 'h': show_mask &= ~SHOW_HV; break; - default: error = 1; break; - } - } - - if (error) - display_help(); -} - -int main(int argc, char *argv[]) -{ - unsigned long offset = 0; - unsigned long head = 0; - struct stat stat; - char *buf; - event_t *event; - int ret; - unsigned long total = 0; - - page_size = getpagesize(); - - process_options(argc, argv); - - input = open(input_name, O_RDONLY); - if (input < 0) { - perror("failed to open file"); - exit(-1); - } - - ret = fstat(input, &stat); - if (ret < 0) { - perror("failed to stat file"); - exit(-1); - } - - if (!stat.st_size) { - fprintf(stderr, "zero-sized file, nothing to do!\n"); - exit(0); - } - - load_kallsyms(); - -remap: - buf = (char *)mmap(NULL, page_size * mmap_window, PROT_READ, - MAP_SHARED, input, offset); - if (buf == MAP_FAILED) { - perror("failed to mmap file"); - exit(-1); - } - -more: - event = (event_t *)(buf + head); - - if (head + event->header.size >= page_size * mmap_window) { - unsigned long shift = page_size * (head / page_size); - int ret; - - ret = munmap(buf, page_size * mmap_window); - assert(ret == 0); - - offset += shift; - head -= shift; - goto remap; - } - - - if (!event->header.size) { - fprintf(stderr, "zero-sized event at file offset %ld\n", offset + head); - fprintf(stderr, "skipping %ld bytes of events.\n", stat.st_size - offset - head); - goto done; - } - - head += event->header.size; - - if (event->header.misc & PERF_EVENT_MISC_OVERFLOW) { - std::string comm, sym, level; - int show = 0; - char output[1024]; - - if (event->header.misc & PERF_EVENT_MISC_KERNEL) { - show |= SHOW_KERNEL; - level = " [k] "; - sym = resolve_kernel_symbol(event->ip.ip); - } else if (event->header.misc & PERF_EVENT_MISC_USER) { - show |= SHOW_USER; - level = " [.] "; - sym = resolve_user_symbol(event->ip.pid, event->ip.ip); - } else { - show |= SHOW_HV; - level = " [H] "; - } - - if (show & show_mask) { - comm = resolve_comm(event->ip.pid); - snprintf(output, sizeof(output), "%16s %s %s", - comm.c_str(), level.c_str(), sym.c_str()); - hist[output]++; - } - - total++; - - } else switch (event->header.type) { - case PERF_EVENT_MMAP: - maps[event->mmap.pid].insert(map(&event->mmap)); - break; - - case PERF_EVENT_COMM: - comms[event->comm.pid] = std::string(event->comm.comm); - break; - } - - if (offset + head < stat.st_size) - goto more; - -done: - - close(input); - - std::map<std::string, int>::iterator hi = hist.begin(); - - while (hi != hist.end()) { - rev_hist.insert(std::pair<int, std::string>(hi->second, hi->first)); - hist.erase(hi++); - } - - std::multimap<int, std::string>::const_iterator ri = rev_hist.begin(); - - while (ri != rev_hist.end()) { - printf(" %5.2f %s\n", (100.0 * ri->first)/total, ri->second.c_str()); - ri++; - } - - return 0; -} - |