diff options
Diffstat (limited to 'tools')
| -rwxr-xr-x | tools/kvm/kvm_stat/kvm_stat | 101 | ||||
| -rw-r--r-- | tools/kvm/kvm_stat/kvm_stat.txt | 6 |
2 files changed, 105 insertions, 2 deletions
diff --git a/tools/kvm/kvm_stat/kvm_stat b/tools/kvm/kvm_stat/kvm_stat index f2a868b696a8..f263312c9a29 100755 --- a/tools/kvm/kvm_stat/kvm_stat +++ b/tools/kvm/kvm_stat/kvm_stat @@ -30,6 +30,7 @@ import fcntl import resource import struct import re +import subprocess from collections import defaultdict VMX_EXIT_REASONS = { @@ -320,6 +321,30 @@ def parse_int_list(list_string): return integers +def get_pid_from_gname(gname): + """Fuzzy function to convert guest name to QEMU process pid. + + Returns a list of potential pids, can be empty if no match found. + Throws an exception on processing errors. + + """ + pids = [] + try: + child = subprocess.Popen(['ps', '-A', '--format', 'pid,args'], + stdout=subprocess.PIPE) + except: + raise Exception + for line in child.stdout: + line = line.lstrip().split(' ', 1) + # perform a sanity check before calling the more expensive + # function to possibly extract the guest name + if ' -name ' in line[1] and gname == get_gname_from_pid(line[0]): + pids.append(int(line[0])) + child.stdout.close() + + return pids + + def get_gname_from_pid(pid): """Returns the guest name for a QEMU process pid. @@ -977,7 +1002,7 @@ class Tui(object): except re.error: continue - def show_vm_selection(self): + def show_vm_selection_by_pid(self): """Draws PID selection mask. Asks for a pid until a valid pid or 0 has been entered. @@ -1016,6 +1041,50 @@ class Tui(object): msg = '"' + str(pid) + '": Not a valid pid' continue + def show_vm_selection_by_guest_name(self): + """Draws guest selection mask. + + Asks for a guest name until a valid guest name or '' is entered. + + """ + msg = '' + while True: + self.screen.erase() + self.screen.addstr(0, 0, + 'Show statistics for specific guest.', + curses.A_BOLD) + self.screen.addstr(1, 0, + 'This might limit the shown data to the trace ' + 'statistics.') + self.screen.addstr(5, 0, msg) + curses.echo() + self.screen.addstr(3, 0, "Guest [ENTER or guest]: ") + gname = self.screen.getstr() + curses.noecho() + + if not gname: + self.refresh_header(0) + self.update_pid(0) + break + else: + pids = [] + try: + pids = get_pid_from_gname(gname) + except: + msg = '"' + gname + '": Internal error while searching, ' \ + 'use pid filter instead' + continue + if len(pids) == 0: + msg = '"' + gname + '": Not an active guest' + continue + if len(pids) > 1: + msg = '"' + gname + '": Multiple matches found, use pid ' \ + 'filter instead' + continue + self.refresh_header(pids[0]) + self.update_pid(pids[0]) + break + def show_stats(self): """Refreshes the screen and processes user input.""" sleeptime = DELAY_INITIAL @@ -1035,8 +1104,11 @@ class Tui(object): if char == 'f': self.show_filter_selection() sleeptime = DELAY_INITIAL + if char == 'g': + self.show_vm_selection_by_guest_name() + sleeptime = DELAY_INITIAL if char == 'p': - self.show_vm_selection() + self.show_vm_selection_by_pid() sleeptime = DELAY_INITIAL except KeyboardInterrupt: break @@ -1106,6 +1178,7 @@ Requirements: Interactive Commands: f filter by regular expression + g filter by guest name p filter by PID q quit x toggle reporting of stats for individual child trace events @@ -1119,6 +1192,22 @@ Press any other key to refresh statistics immediately. else: return "" + def cb_guest_to_pid(option, opt, val, parser): + try: + pids = get_pid_from_gname(val) + except: + raise optparse.OptionValueError('Error while searching for guest ' + '"{}", use "-p" to specify a pid ' + 'instead'.format(val)) + if len(pids) == 0: + raise optparse.OptionValueError('No guest by the name "{}" ' + 'found'.format(val)) + if len(pids) > 1: + raise optparse.OptionValueError('Multiple processes found (pids: ' + '{}) - use "-p" to specify a pid ' + 'instead'.format(" ".join(pids))) + parser.values.pid = pids[0] + optparser = optparse.OptionParser(description=description_text, formatter=PlainHelpFormatter()) optparser.add_option('-1', '--once', '--batch', @@ -1158,6 +1247,14 @@ Press any other key to refresh statistics immediately. dest='pid', help='restrict statistics to pid', ) + optparser.add_option('-g', '--guest', + action='callback', + type='string', + dest='pid', + metavar='GUEST', + help='restrict statistics to guest by name', + callback=cb_guest_to_pid, + ) (options, _) = optparser.parse_args(sys.argv) return options diff --git a/tools/kvm/kvm_stat/kvm_stat.txt b/tools/kvm/kvm_stat/kvm_stat.txt index 077bcc7e20dc..35587c3c2610 100644 --- a/tools/kvm/kvm_stat/kvm_stat.txt +++ b/tools/kvm/kvm_stat/kvm_stat.txt @@ -31,6 +31,8 @@ INTERACTIVE COMMANDS [horizontal] *f*:: filter by regular expression +*g*:: filter by guest name + *p*:: filter by PID *q*:: quit @@ -62,6 +64,10 @@ OPTIONS --pid=<pid>:: limit statistics to one virtual machine (pid) +-g<guest>:: +--guest=<guest_name>:: + limit statistics to one virtual machine (guest name) + -f<fields>:: --fields=<fields>:: fields to display (regex) |