PING: RFR: JDK-8153074: UL: Show output option in VM.log jcmd

David Holmes david.holmes at oracle.com
Wed Jun 22 00:48:15 UTC 2016


On 22/06/2016 9:37 AM, Yasumasa Suenaga wrote:
> PING: Could you review it?
> BTW, should I  add jdk9-fc-request label to JBS?

Yes this enhancement will need approval. Please add the label and other 
information as outlined here:

http://mail.openjdk.java.net/pipermail/jdk9-dev/2016-June/004443.html

Thanks,
David



> Thanks,
>
> Yasumasa
>
> 2016/06/13 13:24 "David Holmes" <david.holmes at oracle.com
> <mailto:david.holmes at oracle.com>>:
>
>     Hi Yasumasa,
>
>     On 13/06/2016 1:45 PM, Yasumasa Suenaga wrote:
>
>         Hi David,
>
>         Thank you for your comment.
>
>             So options are a distinct property of outputs and so should
>             have been
>             a first class entity in LogOutput all along.
>
>
>         I agree to you.
>         But I think we need to discuss about it with logging folks.
>
>         I uploaded a new webrev. It removes fixed buffer length and
>         changes the
>         order of output.
>         Could you review again?
>
>           http://cr.openjdk.java.net/~ysuenaga/JDK-8153074/webrev.05/
>
>
>     It's okay to wait and hear what opinions others may have before
>     changing things based on my comments. :) The fixed buffer may be
>     okay - as I said I don't know what the potential options are, so
>     don't know if it is okay or not.
>
>     Using dynamic allocation avoids that but raises other concerns -
>     like calling vm_exit_on_out_of_memory on failure; or whether to use
>     malloc or resource area?
>
>     Lets wait for other feedback before going further.
>
>     Thanks,
>     David
>
>
>         Thanks,
>
>         Yasumasa
>
>
>         On 2016/06/13 9:05, David Holmes wrote:
>
>             Hi Yasumasa,
>
>             On 13/06/2016 9:30 AM, Yasumasa Suenaga wrote:
>
>                 Hi David,
>
>                 I think "config_string" is different from "option_string".
>
>                 -Xlog format (from -Xlog:help message):
>                   -Xlog[:[what][:[output][:[decorators][:output-options]]]]
>
>                   config_string: "what" (ex. gc=trace)
>                   option_string: "output-options" (ex. filecount=5)
>
>                 Currently, LogOutput handles tags and loglevels only as
>                 config_string.
>                 It does not contain output options.
>
>
>             Okay I'm starting to see the bigger picture here. In terms
>             of the
>             overall logging configuration we might have, for example:
>
>             gc=trace -> stdout
>             runtime=info -> fileA
>             compiler=trace -> fileB
>
>             where the LHS is (part of) the configuration, and the RHS is the
>             output. So for each output we set its "configuration" to the
>             associated LHS.
>
>             So options are a distinct property of outputs and so should
>             have been
>             a first class entity in LogOutput all along.
>
>             Okay so looking at your v4 I have two comments:
>
>             First, hard-wiring OPTIONS_LEN. I don't know what the
>             possible options
>             are so don't know if 100 is adequate.
>
>             Second, if the logging syntax is:
>
>              -Xlog[:[what][:[output][:[decorators][:output-options]]]]
>
>             then shouldn't the configuration be printed in the same
>             order/format?
>
>             Thanks,
>             David
>
>
>                 Thanks,
>
>                 Yasumasa
>
>
>                 On 2016/06/13 8:14, David Holmes wrote:
>
>                     On 12/06/2016 11:10 PM, Yasumasa Suenaga wrote:
>
>                         Hi David,
>
>                         Thank you for your comment.
>
>                             Is there some reason the option string could
>                             not simply become
>                             part of
>                             the existing configuration string?
>
>
>                         My first proposal keeps option string at
>                         LogOutput and its child class
>                         (See webrev.01).
>                         Marcus commented that option string should be
>                         generated from current
>                         configuration.
>
>                         I uploaded new webrev.
>                         Could you review again?
>
>
>                         http://cr.openjdk.java.net/~ysuenaga/JDK-8153074/webrev.04/
>
>
>                     Sorry but I repeat my question - why is the option
>                     information not
>                     simply part of the config_string?
>
>                     Thanks,
>                     David
>
>
>                         Thanks,
>
>                         Yasumasa
>
>
>                         On 2016/06/12 6:44, David Holmes wrote:
>
>                             Hi Yasumasa,
>
>                             Sorry but this API seems poorly fitting to
>                             me. First
>                             print_option_string seems the wrong name
>                             given that the base class,
>                             LogOutput, has no notion of having an
>                             "option string". It seems to be
>                             a supposedly generic "print other stuff"
>                             function that only one class
>                             actually needs to implement.
>
>                             Secondly it inverts the style of the API
>                             used for everything else
>                             - we
>                             have getters for all the other "properties"
>                             which are then printed by
>                             the describe_current_configuration method.
>                             But this is instead a
>                             "print" function  where we ask the target to
>                             print itself. Mixing the
>                             two styles seems messy. It probably would
>                             have been better to have
>                             had
>                             a print-style API from the start - then
>                             adding the options would have
>                             been a trivial extension for those output
>                             classes with options.
>
>                             In addition the change you made to
>                             describe_current_configuration is
>                             not at all general purpose - you wanted a
>                             given format (print between
>                             the config string and the decorators) for
>                             this one class and so you
>                             added the code to support that format. But
>                             that format may not make
>                             sense for other classes that might have
>                             "extra stuff" to print.
>
>                             Is there some reason the option string could
>                             not simply become
>                             part of
>                             the existing configuration string? It seems
>                             to me that for a LogFile
>                             these "options" really are part of the
>                             configuration.
>
>                             Thanks,
>                             David
>
>                             PS. The two hpp files would need their
>                             copyright years updated to
>                             "2015, 2016,".
>
>                             On 11/06/2016 10:30 PM, Yasumasa Suenaga wrote:
>
>                                 PING: Could you review it?
>                                 We need a second reviewer.
>
>
>                                                 http://cr.openjdk.java.net/~ysuenaga/JDK-8153074/webrev.03/
>
>
>                                 This change is small fix, and it helps
>                                 us to confirm current
>                                 FileLogOutput configuration.
>                                 So I want to merge it to jdk 9.
>
>
>                                 Thanks,
>
>                                 Yasumasa
>
>
>                                 On 2016/05/17 19:17, Yasumasa Suenaga wrote:
>
>                                     PING: Could you review it?
>
>
>                                                 http://cr.openjdk.java.net/~ysuenaga/JDK-8153074/webrev.03/
>
>
>
>                                     Thanks,
>
>                                     Yasumasa
>
>
>                                     On 2016/05/10 8:06, Yasumasa Suenaga
>                                     wrote:
>
>                                         We need a second reviewer.
>                                         Could you review it?
>
>
>                                                 http://cr.openjdk.java.net/~ysuenaga/JDK-8153074/webrev.03/
>
>
>
>                                         Yasumasa
>
>
>                                         On 2016/05/04 23:38, Marcus
>                                         Larsson wrote:
>
>                                             Hi,
>
>
>                                             On 05/04/2016 04:12 PM,
>                                             Yasumasa Suenaga wrote:
>
>                                                 Hi Marcus,
>
>                                                     93
>                                                     out->print("filecount=%u,filesize="
>                                                     SIZE_FORMAT "%s ",
>                                                     _file_count,
>                                                     byte_size_in_proper_unit(_rotate_size),
>                                                     proper_unit_for_byte_size(_rotate_size));
>
>
>                                                 Thanks, I applied it to
>                                                 new webrev:
>
>
>                                                 http://cr.openjdk.java.net/~ysuenaga/JDK-8153074/webrev.03/
>
>
>                                             Looks OK.
>
>                                             Thanks,
>                                             Marcus
>
>
>                                                 Could you review again?
>
>
>                                                 Yasumasa
>
>
>                                                 On 2016/05/04 22:35,
>                                                 Marcus Larsson wrote:
>
>                                                     Hi,
>
>
>                                                     On 05/04/2016 02:59
>                                                     PM, Yasumasa Suenaga
>                                                     wrote:
>
>                                                         Hi Marcus,
>
>                                                         Thank you for
>                                                         your comment.
>
>
>                                                         http://cr.openjdk.java.net/~ysuenaga/JDK-8153074/webrev.02/
>
>
>                                                     Looks better. The
>                                                     format for
>                                                     _rotate_size should be
>                                                     SIZE_FORMAT.
>
>                                                     While we're at it I
>                                                     think it would be
>                                                     good (as I mentioned) to
>                                                     use
>                                                     a proper unit for
>                                                     the filesize.
>                                                     Basically changing
>
>                                                     93
>                                                     out->print("filecount=%u,filesize=%lu
>                                                     ", _file_count,
>                                                     _rotate_size);
>
>                                                     into
>
>                                                     93
>                                                     out->print("filecount=%u,filesize="
>                                                     SIZE_FORMAT "%s ",
>                                                     _file_count,
>                                                     byte_size_in_proper_unit(_rotate_size),
>                                                     proper_unit_for_byte_size(_rotate_size));
>
>
>                                                     Thanks,
>                                                     Marcus
>
>
>                                                         I fixed to use
>                                                         _rotate_size and
>                                                         _file_count
>                                                         directly to show
>                                                         VM.log list jcmd.
>                                                         I do not store
>                                                         option string,
>                                                         and I added new
>                                                         function to
>                                                         print
>                                                         option string.
>
>                                                         Could you review
>                                                         it again?
>
>
>                                                         Thanks.
>
>                                                         Yasumasa
>
>
>                                                         On 2016/05/04
>                                                         18:33, Marcus
>                                                         Larsson wrote:
>
>                                                             Hi,
>
>
>                                                             On
>                                                             05/03/2016
>                                                             01:43 PM,
>                                                             Yasumasa
>                                                             Suenaga wrote:
>
>                                                                 PING:
>                                                                 Could
>                                                                 you
>                                                                 review
>                                                                 and
>                                                                 sponsor it?
>
>                                                                     http://cr.openjdk.java.net/~ysuenaga/JDK-8153074/webrev.01/
>
>
>                                                             I would
>                                                             prefer to
>                                                             generate the
>                                                             option
>                                                             string from
>                                                             the actual
>                                                             options
>                                                             rather than
>                                                             saving the
>                                                             string from
>                                                             when it was
>                                                             configured.
>                                                             This would
>                                                             also
>                                                             produce/print the
>                                                             options for
>                                                             outputs that
>                                                             are using
>                                                             the defaults
>                                                             (which is
>                                                             not the case
>                                                             now).
>                                                             The filesize
>                                                             option could
>                                                             then use
>                                                             byte_size_in_proper_unit
>                                                             and
>                                                             proper_unit_for_byte_size
>                                                             to make it
>                                                             easier to read.
>
>                                                             Also,
>                                                             get_option_string()
>                                                             should just
>                                                             be called
>                                                             option_string().
>
>                                                             Thanks,
>                                                             Marcus
>
>
>                                                                 This
>                                                                 patch
>                                                                 makes to
>                                                                 show
>                                                                 option
>                                                                 string
>                                                                 of
>                                                                 LogFileOutput.
>
>
>                                                                 Thanks,
>
>                                                                 Yasumasa
>
>
>                                                                 On
>                                                                 2016/04/19
>                                                                 22:55,
>                                                                 Yasumasa
>                                                                 Suenaga
>                                                                 wrote:
>
>                                                                     I
>                                                                     adapted
>                                                                     changes
>                                                                     to
>                                                                     jdk9/hs/hotspot
>                                                                     repos.
>
>                                                                     http://cr.openjdk.java.net/~ysuenaga/JDK-8153074/webrev.01/
>
>                                                                     Please
>                                                                     review.
>
>
>                                                                     Yasumasa
>
>
>                                                                     On
>                                                                     2016/04/18
>                                                                     23:09,
>                                                                     Yasumasa
>                                                                     Suenaga
>                                                                     wrote:
>
>                                                                         PING:
>
>                                                                         I've
>                                                                         sent
>                                                                         review
>                                                                         request
>                                                                         for
>                                                                         JDK-8153074.
>                                                                         Could
>                                                                         you
>                                                                         review
>                                                                         it?
>
>                                                                         http://cr.openjdk.java.net/~ysuenaga/JDK-8153074/webrev.00/
>
>
>                                                                         If
>                                                                         this
>                                                                         patch
>                                                                         is
>                                                                         merged,
>                                                                         user
>                                                                         can
>                                                                         confirm
>                                                                         output
>                                                                         option
>                                                                         via
>                                                                         VM.log
>                                                                         jcmd.
>
>
>                                                                         Please
>                                                                         review
>                                                                         and
>                                                                         sponsor
>                                                                         it.
>
>
>                                                                         Thanks,
>
>                                                                         Yasumasa
>
>
>                                                                         On
>                                                                         2016/04/11
>                                                                         18:29,
>                                                                         Yasumasa
>                                                                         Suenaga
>                                                                         wrote:
>
>                                                                             PING:
>                                                                             Could
>                                                                             you
>                                                                             review
>                                                                             and
>                                                                             sponsor
>                                                                             it?
>
>                                                                                     http://cr.openjdk.java.net/~ysuenaga/JDK-8153074/webrev.00/
>
>
>
>
>                                                                             Thanks,
>
>                                                                             Yasumasa
>
>
>                                                                             On
>                                                                             2016/03/31
>                                                                             22:35,
>                                                                             Yasumasa
>                                                                             Suenaga
>                                                                             wrote:
>
>                                                                                 CC'ed
>                                                                                 to
>                                                                                 serviceability-dev.
>
>                                                                                 Could
>                                                                                 you
>                                                                                 review
>                                                                                 it?
>
>                                                                                     http://cr.openjdk.java.net/~ysuenaga/JDK-8153074/webrev.00/
>
>
>
>
>                                                                                 Thanks,
>
>                                                                                 Yasumasa
>
>
>                                                                                 On
>                                                                                 2016/03/30
>                                                                                 23:09,
>                                                                                 Yasumasa
>                                                                                 Suenaga
>                                                                                 wrote:
>
>                                                                                     Hi
>                                                                                     all,
>
>                                                                                     This
>                                                                                     request
>                                                                                     review
>                                                                                     is
>                                                                                     related
>                                                                                     to
>                                                                                     [1].
>
>                                                                                     I want
>                                                                                     to
>                                                                                     see
>                                                                                     output
>                                                                                     option
>                                                                                     (filecount,
>                                                                                     filesize)
>                                                                                     in
>                                                                                     VM.log
>                                                                                     jcmd.
>
>
>                                                                                      Output
>                                                                                     sample:
>
>
>                                                                                      #2:
>                                                                                     gc.log
>                                                                                     gc=trace,
>                                                                                     filecount=5,filesize=1048576
>                                                                                     time,level,
>
>                                                                                     I uploaded
>                                                                                     webrev.
>                                                                                     Could
>                                                                                     you
>                                                                                     review
>                                                                                     it?
>
>                                                                                     http://cr.openjdk.java.net/~ysuenaga/JDK-8153074/webrev.00/
>
>
>
>
>                                                                                     I cannot
>                                                                                     access
>                                                                                     JPRT.
>                                                                                     So
>                                                                                     I need
>                                                                                     a sponsor.
>
>
>                                                                                     Thanks,
>
>                                                                                     Yasumasa
>
>
>                                                                                     [1]
>                                                                                     http://mail.openjdk.java.net/pipermail/hotspot-runtime-dev/2016-March/018704.html
>
>
>
>
>
>
>
>
>


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