Hi Jini,
This looks good. I'm totally fine with skipping metaspace if that isn't
displayed for the other GCs.
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Cheers,
Stefan
On 2018-03-09 10:29, Jini George wrote:
Here is the revised webrev:
http://cr.openjdk.java.net/~jgeorge/8175312/webrev.02/
I have made modifications to have the 'universe' command display
details like:
hsdb> universe
Heap Parameters:
garbage-first heap [0x0000000725200000, 0x00000007c0000000] region
size 1024K
G1 Heap:
regions = 2478
capacity = 2598371328 (2478.0MB)
used = 5242880 (5.0MB)
free = 2593128448 (2473.0MB)
0.20177562550443906% used
G1 Young Generation:
Eden Space:
regions = 5
capacity = 8388608 (8.0MB)
used = 5242880 (5.0MB)
free = 3145728 (3.0MB)
62.5% used
Survivor Space:
regions = 0
capacity = 0 (0.0MB)
used = 0 (0.0MB)
free = 0 (0.0MB)
0.0% used
G1 Old Generation:
regions = 0
capacity = 155189248 (148.0MB)
used = 0 (0.0MB)
free = 155189248 (148.0MB)
0.0% used
I did not add the metaspace details since that did not seem to be in
line with the 'universe' output for other GCs. I have added a new
command "g1regiondetails" to display the region details, and have
modified the tests accordingly.
hsdb> g1regiondetails
Region Details:
Region: 0x0000000725200000,0x0000000725200000,0x0000000725300000:Free
Region: 0x0000000725300000,0x0000000725300000,0x0000000725400000:Free
Region: 0x0000000725400000,0x0000000725400000,0x0000000725500000:Free
Region: 0x0000000725500000,0x0000000725500000,0x0000000725600000:Free
Region: 0x0000000725600000,0x0000000725600000,0x0000000725700000:Free
Region: 0x0000000725700000,0x0000000725700000,0x0000000725800000:Free
...
Thanks,
Jini.
On 2/28/2018 12:56 PM, Jini George wrote:
Thank you very much, Stefan. My answers inline.
On 2/27/2018 3:30 PM, Stefan Johansson wrote:
Hi Jini,
JIRA ID:https://bugs.openjdk.java.net/browse/JDK-8175312
Webrev:
http://cr.openjdk.java.net/~jgeorge/8175312/webrev.00/index.html
It looks like a file is missing, did you forget to add it to the
changeset?
Indeed, I had missed that! I added the missing file in the following
webrev:
http://cr.openjdk.java.net/~jgeorge/8175312/webrev.01/
---
open/src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/gc/g1/G1CollectedHeap.java:36:
error: cannot find symbol
import sun.jvm.hotspot.gc.shared.PrintRegionClosure;
---
Otherwise the change looks good, but I would like to see the output
live. For a big heap this will print a lot of data, just wondering
if the universe command is the correct choice for this kind of
output. I like having the possibility to print all regions, so I
want the change but maybe it should be a different command and
'universe' just prints a little more than before. Something like our
logging heap-summary at shutdown:
garbage-first heap total 16384K, used 3072K [0x00000000ff000000,
0x0000000100000000)
region size 1024K, 4 young (4096K), 0 survivors (0K)
Metaspace used 6731K, capacity 6825K, committed 7040K,
reserved 1056768K
class space used 559K, capacity 594K, committed 640K, reserved
1048576K
Ok, will add this, and could probably have the region details
displayed under a new command called "g1regiondetails", or some such,
and send out a new webrev.
Thanks,
Jini.
Thanks,
Stefan
Modifications have been made to display the regions like:
...
Region: 0x00000005c5400000,0x00000005c5600000,0x00000005c5600000:Old
Region: 0x00000005c5600000,0x00000005c5800000,0x00000005c5800000:Old
Region: 0x00000005c5800000,0x00000005c5a00000,0x00000005c5a00000:Old
Region: 0x00000005c5a00000,0x00000005c5c00000,0x00000005c5c00000:Old
Region: 0x00000005c5c00000,0x00000005c5c00000,0x00000005c5e00000:Free
Region: 0x00000005c5e00000,0x00000005c5e00000,0x00000005c6000000:Free
Region: 0x00000005c6000000,0x00000005c6200000,0x00000005c6200000:Old
...
The jtreg test at this point does not include any testing for the
display of archived or pinned regions. The testing for this will
be added once JDK-8174994 is resolved.
The SA tests pass with jprt and Mach5.
Thanks,
Jini.
