i don't know about that (maybe someone on the list knows where one
can download pre-built non-product binaries from), but if you are set up to
build hotspot, you would use target fastdebug.
-- ramki
On 8/25/2011 2:34 PM, suraj puvvada wrote:
Thanks.
Are the non-product builds available online to download ?
-Suraj
On Thu, Aug 25, 2011 at 1:37 PM, Ramki Ramakrishna
<[email protected] <mailto:[email protected]>> wrote:
Hi Suraj --
Either:
(1) use a non-product build where the flag is available, OR
(2) rebuild with Verbose declared a product flag (but you will
have to deal with
develop->product contagion which will require more such
changes), OR
(3) (probably the easiest in a specific product build) rebuild
with Verbose changed to
a new product flag of your choice for the specific sites
where you want to print the info
but want to retain the option of turning it off. Depending
on where you do this, this
may also cause a develop->product contagion, but it will be
a more controlled burn, if
i may be allowed to mix my metaphors.
(..) anything else?
The above are all one-off's for use in a specific build.
There may be good reason to protect some of these more useful
messages with a product
flag rather than with a develop flag. I recall Krystal Mok also
mentioning something similar.
Perhaps the community can work on what are the kinds of messages
one might want to
see in production (under control of a suitable manageable/product
flag), and submit an OpenJDK
patch with those changes (hopefully the performance impact of the
check or enablement
will be minor enough when these changes are for example
communicating ergonomic
decisions etc. -- this should of course be performance checked
before a patch is submitted).
I'm also hoping that in the future some of these may be captured
by the logging framework
under construction. Those working on or planning to work on the
logging framework may hav
more to add. So I am cc'ing the serviceability alias as well.
-- ramki
On 8/25/2011 12:58 PM, suraj puvvada wrote:
Hi,
How can I enable DEVELOP mode flags like "Verbose" ? I'm
interested in seeing what the GC code logs - for example :
if (PrintGCDetails && Verbose) {
gclog_or_tty->print_cr("ConcurrentMarkSweepGeneration::shrink_by:"
" desired_bytes " SIZE_FORMAT
" shrinkable_size_in_bytes " SIZE_FORMAT
" aligned_shrinkable_size_in_bytes " SIZE_FORMAT
" bytes " SIZE_FORMAT,
desired_bytes, shrinkable_size_in_bytes,
aligned_shrinkable_size_in_bytes, bytes);
gclog_or_tty->print_cr(" old_end " SIZE_FORMAT
" unallocated_start " SIZE_FORMAT,
old_end, unallocated_start);
}
-Suraj
