RFR(S): 8005885: enhance PrintCodeCache to print more data

[Albert Noll]

Hi,

could I get reviews for the following patch?

jbs: https://bugs.openjdk.java.net/browse/JDK-8005885
webrev: http://cr.openjdk.java.net/~anoll/8005885/webrev.00/ 
<http://cr.openjdk.java.net/%7Eanoll/8005885/webrev.00/>

Many thanks in advance,
Albert

Problem: Currently we only print:

CodeCache:
nmethod dependency checking time 0.037552
  #944 live = 3681K (hdr 4%, loc 2%, code 74%, stub 1%, [oops 0%, data 
0%, pcs 5%])
  #92 dead = 247K (hdr 7%, loc 6%, code 46%, stub 3%, [oops 0%, data 0%, 
pcs 12%])

It would be helpful to have more detailed information about the code cache.

Solution: add more detailed information about the content of the code 
cache when
                exiting the VM.


See sample outputs:
java -XX:-TieredCompilation -XX:+PrintCodeCache -jar 
dacapo-9.12-bach.jar fop
===== DaCapo 9.12 fop starting =====
===== DaCapo 9.12 fop PASSED in 7676 msec =====
CodeCache: size=49152Kb used=1729Kb max_used=1782Kb free=47422Kb
  bounds [0x00007fbc13fb1000, 0x00007fbc14221000, 0x00007fbc16fb1000]
  total_blobs=814 nmethods=512 adapters=254
  compilation: enabled

Interpreter:  total=199k, used=124k

Total number of live methods: 510
  Tier 1:
   #0 Java methods
   #0 OSR methods
  Tier 2:
   #0 Java methods
   #0 OSR methods
  Tier 3:
   #0 Java methods
   #0 OSR methods
  Tier 4:
   #500 Java methods = 1119K (hdr 12%,  loc 4%, code 38%, stub 2%, [oops 
0%, data 1%, pcs 24%])
   #5 OSR methods = 37K (hdr 3%,  loc 3%, code 41%, stub 2%, [oops 0%, 
data 1%, pcs 30%])
  Native methods:
   #5 Native methods = 4K (hdr 31%,  loc 10%, code 55%, stub 0%, [oops 
0%, data 0%, pcs 0%])

Total number of dead methods: 2
  Tier 1:
   #0 Java methods
   #0 OSR methods
  Tier 2:
   #0 Java methods
   #0 OSR methods
  Tier 3:
   #0 Java methods
   #0 OSR methods
  Tier 4:
   #1 Java methods = 67K (hdr 0%,  loc 3%, code 41%, stub 0%, [oops 0%, 
data 0%, pcs 40%])
   #1 OSR methods = 18K (hdr 1%,  loc 4%, code 39%, stub 2%, [oops 0%, 
data 1%, pcs 31%])
  Native methods:
   #0 Native methods

Total number of stubs: 302
   #23 runtime = 5K (hdr 25%,  loc 1%, code 67%, stub 0%, [oops 0%, data 
0%, pcs 0%])
   #1 deoptimization = 1K (hdr 7%,  loc 0%, code 89%, stub 0%, [oops 0%, 
data 0%, pcs 0%])
   #1 uncommon trap = 0K (hdr 13%,  loc 1%, code 83%, stub 0%, [oops 0%, 
data 0%, pcs 0%])
   #1 exception = 0K (hdr 27%,  loc 3%, code 65%, stub 0%, [oops 0%, 
data 0%, pcs 0%])
   #3 safepoint = 1K (hdr 10%,  loc 1%, code 86%, stub 0%, [oops 0%, 
data 0%, pcs 0%])
   #254 C2I/I2C adapter = 116K (hdr 13%,  loc 1%, code 82%, stub 0%, 
[oops 0%, data 0%, pcs 0%])
   #0 method handles adapter
   #19 other = 308K (hdr 0%,  loc 0%, code 99%, stub 0%, [oops 0%, data 
0%, pcs 0%])


java -XX:+TieredCompilation -XX:+PrintCodeCache -jar 
dacapo-9.12-bach.jar fop
===== DaCapo 9.12 fop starting =====
===== DaCapo 9.12 fop PASSED in 4850 msec =====
CodeCache: size=245760Kb used=7355Kb max_used=7370Kb free=238404Kb
  bounds [0x00007f49fd000000, 0x00007f49fd740000, 0x00007f4a0c000000]
  total_blobs=2578 nmethods=2240 adapters=254
  compilation: enabled

Interpreter:  total=199k, used=123k

Total number of live methods: 2205
  Tier 1:
   #466 Java methods = 333K (hdr 39%,  loc 5%, code 25%, stub 19%, [oops 
0%, data 0%, pcs 1%])
   #0 OSR methods
  Tier 2:
   #429 Java methods = 1047K (hdr 11%,  loc 5%, code 40%, stub 8%, [oops 
0%, data 1%, pcs 18%])
   #0 OSR methods
  Tier 3:
   #1069 Java methods = 3817K (hdr 7%,  loc 4%, code 53%, stub 5%, [oops 
0%, data 0%, pcs 17%])
   #5 OSR methods = 92K (hdr 1%,  loc 4%, code 57%, stub 2%, [oops 0%, 
data 0%, pcs 23%])
  Tier 4:
   #190 Java methods = 648K (hdr 8%,  loc 3%, code 43%, stub 1%, [oops 
0%, data 1%, pcs 26%])
   #3 OSR methods = 15K (hdr 5%,  loc 3%, code 47%, stub 1%, [oops 0%, 
data 0%, pcs 28%])
  Native methods:
   #43 Native methods = 37K (hdr 31%,  loc 10%, code 55%, stub 0%, [oops 
0%, data 0%, pcs 0%])

Total number of dead methods: 35
  Tier 1:
   #0 Java methods
   #0 OSR methods
  Tier 2:
   #3 Java methods = 22K (hdr 3%,  loc 5%, code 40%, stub 6%, [oops 0%, 
data 1%, pcs 27%])
   #0 OSR methods
  Tier 3:
   #31 Java methods = 193K (hdr 4%,  loc 4%, code 54%, stub 3%, [oops 
0%, data 0%, pcs 21%])
   #1 OSR methods = 2K (hdr 11%,  loc 5%, code 52%, stub 7%, [oops 0%, 
data 0%, pcs 7%])
  Tier 4:
   #0 Java methods
   #0 OSR methods
  Native methods:
   #0 Native methods

Total number of stubs: 338
   #57 runtime = 24K (hdr 14%,  loc 3%, code 79%, stub 0%, [oops 0%, 
data 0%, pcs 0%])
   #1 deoptimization = 1K (hdr 7%,  loc 0%, code 89%, stub 0%, [oops 0%, 
data 0%, pcs 0%])
   #1 uncommon trap = 0K (hdr 13%,  loc 1%, code 83%, stub 0%, [oops 0%, 
data 0%, pcs 0%])
   #1 exception = 0K (hdr 27%,  loc 3%, code 65%, stub 0%, [oops 0%, 
data 0%, pcs 0%])
   #3 safepoint = 1K (hdr 10%,  loc 1%, code 86%, stub 0%, [oops 0%, 
data 0%, pcs 0%])
   #254 C2I/I2C adapter = 116K (hdr 13%,  loc 1%, code 82%, stub 0%, 
[oops 0%, data 0%, pcs 0%])
   #0 method handles adapter
   #21 other = 871K (hdr 0%,  loc 0%, code 99%, stub 0%, [oops 0%, data 
0%, pcs 0%])


Please let me know if you think more/less/different data should be printed.
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