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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 <yangds.fnst@cn.fujitsu.com> Cc: David Ahern <dsahern@gmail.com> Link: http://lkml.kernel.org/r/1386609311-23889-1-git-send-email-yangds.fnst@cn.fujitsu.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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2 changed files with 7 additions and 2 deletions
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@ -10,9 +10,9 @@ SYNOPSIS
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[verse]
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'perf kvm' [--host] [--guest] [--guestmount=<path>
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[--guestkallsyms=<path> --guestmodules=<path> | --guestvmlinux=<path>]]
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{top|record|report|diff|buildid-list}
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{top|record|report|diff|buildid-list} [<options>]
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'perf kvm' [--host] [--guest] [--guestkallsyms=<path> --guestmodules=<path>
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| --guestvmlinux=<path>] {top|record|report|diff|buildid-list|stat}
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| --guestvmlinux=<path>] {top|record|report|diff|buildid-list|stat} [<options>]
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'perf kvm stat [record|report|live] [<options>]
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DESCRIPTION
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@ -93,6 +93,9 @@ OPTIONS
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kernel module information. Users copy it out from guest os.
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--guestvmlinux=<path>::
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Guest os kernel vmlinux.
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-v::
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--verbose::
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Be more verbose (show counter open errors, etc).
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STAT REPORT OPTIONS
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-------------------
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@ -1690,6 +1690,8 @@ int cmd_kvm(int argc, const char **argv, const char *prefix __maybe_unused)
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"file", "file saving guest os /proc/kallsyms"),
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OPT_STRING(0, "guestmodules", &symbol_conf.default_guest_modules,
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"file", "file saving guest os /proc/modules"),
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OPT_INCR('v', "verbose", &verbose,
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"be more verbose (show counter open errors, etc)"),
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OPT_END()
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};
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