Re: [rvm-research] Xmx Option in Jikes

sorry, my attempt to highlight a character got mangled by a mail server
along the way.

Your email said 20480M, which is around 20 gigabytes.  Try 2048M instead,
which is 2 gigabytes.

I suspect that the heap size is being rejected as too big by some low-level
part of the system and the error message you are getting is misleading.

--dave




From:	Khaled Z Mahmoud <[email protected]>
To:	"General discussion of Jikes RVM design, implementation,
            issues, and plans" <[email protected]>
Date:	05/21/2018 01:38 PM
Subject:	Re: [rvm-research] Xmx Option in Jikes



Hi,

I cannot see it defined in
"rvm/src/org/jikesrvm/runtime/CommandLineArgs.java".
As I understand, all "Jikes" parameters are defined and handled in there.

On Mon, May 21, 2018 at 1:16 PM, David P Grove <[email protected]> wrote:
  Do you really mean -Xmx2048M

  Try -Xmx2048M

  --dave


  Inactive hide details for Khaled Z Mahmoud ---05/21/2018 01:12:37
  PM---Here is the command I tried sudo ./dist/FullAdaptiveMarkKhaled Z
  Mahmoud ---05/21/2018 01:12:37 PM---Here is the command I tried
  sudo ./dist/FullAdaptiveMarkSweep_x86_64-linux/rvm "-X:perf:frequency=75

  From: Khaled Z Mahmoud <[email protected]>
  To: "General discussion of Jikes RVM design, implementation, issues, and
  plans" <[email protected]>
  Date: 05/21/2018 01:12 PM
  Subject: Re: [rvm-research] Xmx Option in Jikes




  Here is the command I tried

  sudo ./dist/FullAdaptiveMarkSweep_x86_64-linux/rvm
  "-X:perf:frequency=7500" "-X:perf:enabled=true"
  "-X:perf:counters=PAPI_SR_INS,PAPI_TOT_CYC,PAPI_TOT_INS"
  "-X:perf:package_counters=PAPI_L3_TCM" "-X:perf:accumulate=true" "-
  Xmx20480M"  cache_misses

  Error Message: vm: "-Xmx20480M" is not a recognized Jikes RVM command
  line argument.

  I also tried "-X:Xmx20480M" and "-X:Xmx=20480: and still same error
  message


  On Mon, May 21, 2018 at 6:03 AM, Erik Brangs <[email protected]> wrote:
        Hi,

        On 21.05.2018 09:10, Khaled Z Mahmoud wrote:
        > How can I pass Xmx option to Jikes.
        > In normal Java runtime, it would be something like java
        HelloWorld -Xmx2048M.

        The order is wrong. It should read "java -Xmx2048M HelloWorld". If
        you use "java HelloWorld -Xmx2048M", you'll pass the argument
        "-Xmx2048M" to the HelloWorld program which isn't what you want.

        > However, Jikes does not recognize this option :(.

        What's the error message you're getting?


        Kind regards,

        Erik Brangs

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  Regards,
  Khaled Mahmoud
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Regards,
Khaled Mahmoud
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