From 100b907350c87aa1f3b5dbd95bac3ad5aad3e108 Mon Sep 17 00:00:00 2001 From: Dongsheng Yang Date: Mon, 9 Dec 2013 12:15:11 -0500 Subject: [PATCH] perf kvm: Introduce option -v for perf kvm command. As there is no -v option for perf kvm, the all debug message for perf kvm will nerver be printed out to user. Example: # perf kvm --guestmount /tmp/guestmount/ record -a Not enough memory for reading perf file header It is confusing message for newbies such as me. With this patch applied, we can use -v option to get the detail. Example: # perf kvm --guestmount /tmp/guestmount/ record -a -v Can't access file /tmp/guestmount//15069/proc/kallsyms Not enough memory for reading perf file header Signed-off-by: Dongsheng Yang Cc: David Ahern Link: http://lkml.kernel.org/r/1386609311-23889-1-git-send-email-yangds.fnst@cn.fujitsu.com Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/Documentation/perf-kvm.txt | 7 +++++-- tools/perf/builtin-kvm.c | 2 ++ 2 files changed, 7 insertions(+), 2 deletions(-) diff --git a/tools/perf/Documentation/perf-kvm.txt b/tools/perf/Documentation/perf-kvm.txt index 96a9a1d..52276a6 100644 --- a/tools/perf/Documentation/perf-kvm.txt +++ b/tools/perf/Documentation/perf-kvm.txt @@ -10,9 +10,9 @@ SYNOPSIS [verse] 'perf kvm' [--host] [--guest] [--guestmount= [--guestkallsyms= --guestmodules= | --guestvmlinux=]] - {top|record|report|diff|buildid-list} + {top|record|report|diff|buildid-list} [] 'perf kvm' [--host] [--guest] [--guestkallsyms= --guestmodules= - | --guestvmlinux=] {top|record|report|diff|buildid-list|stat} + | --guestvmlinux=] {top|record|report|diff|buildid-list|stat} [] 'perf kvm stat [record|report|live] [] DESCRIPTION @@ -93,6 +93,9 @@ OPTIONS kernel module information. Users copy it out from guest os. --guestvmlinux=:: Guest os kernel vmlinux. +-v:: +--verbose:: + Be more verbose (show counter open errors, etc). STAT REPORT OPTIONS ------------------- diff --git a/tools/perf/builtin-kvm.c b/tools/perf/builtin-kvm.c index f8bf5f2..d9cc0e3 100644 --- a/tools/perf/builtin-kvm.c +++ b/tools/perf/builtin-kvm.c @@ -1690,6 +1690,8 @@ int cmd_kvm(int argc, const char **argv, const char *prefix __maybe_unused) "file", "file saving guest os /proc/kallsyms"), OPT_STRING(0, "guestmodules", &symbol_conf.default_guest_modules, "file", "file saving guest os /proc/modules"), + OPT_INCR('v', "verbose", &verbose, + "be more verbose (show counter open errors, etc)"), OPT_END() }; -- 2.7.4