Client VM for 64 bit linux
Helbrass
helbrass at gmail.com
Thu Dec 27 20:26:12 UTC 2012
Hi Phil,
First of all, you're always building both server and client for 32 bit,
what's the big deal with always building it for 64 bit?
Second, I'm agree that in most cases server VM may be better, but in my
case I'm programmer, not server administrator, and all day long I'm using
NetBeans (which is awesome!). And it happened, that NetBeans cannot open
full OpenJDK project on 64 bit VM because it fails with OutOfMemory, and
when you're giving him 3GB RAM it still takes huge amount of time to scan
everything. While on 32 bit client vm it works without any problems
whatsoever. Unfortunately, I don't know hotspot internals to explain why
this is happening, but still, cold start on 32 bit client takes NetBeans 3
seonds, and cold start on 32 bit server vm takes 12 seconds. You'll say
it's just 10 seconds difference, I'd say it's 4 times difference.
I agree that this is minor issue, and openjdk developer team would not
want to take any responsibilities for this, but for me personally it's
just a possibility to get client openjdk vm without doing chrooted 32 bit
install of full linux.
On Thu, 27 Dec 2012 20:13:46 +0200, Phil Race <philip.race at oracle.com>
wrote:
> I am fairly sure we do not want the build system to spit out a 64 bit
> client VM by default.
> My recollection from many years ago is that the VM team and performance
> team determined
> that the 64 bit server VM was as good as, or better than the 64 bit
> client VM on all the
> metrics that mattered and thus there was no reason for the 64 bit client
> VM to be
> supported.
>
> If you want an option to enable it that's one thing, but below it looks
> like its always
> built. Release engineering, product management, SQE and others will
> object.
>
> -phil.
>
> On 12/27/2012 1:14 AM, Aekold Helbrass wrote:
>> Hi David,
>>
>> Thanx for your answer. Yes, patches are really small, I hope they will
>> not
>> be crippled by email renderer. See patches below.
>>
>> And about new build system, can you please link me where can I read more
>> about it?
>>
>> #######################################################################################
>> #######################################################################################
>> ### APPLY THIS PATCH ONTO HOTSPOT SUBFOLDER
>> ###########################################
>> #######################################################################################
>> #######################################################################################
>> Index: make/Makefile
>> --- make/Makefile Base (BASE)
>> +++ make/Makefile Locally Modified (Based On LOCAL)
>> @@ -183,14 +183,10 @@
>> @$(ECHO) "No compiler1 ($(VM_TARGET)) for
>> ARCH_DATA_MODEL=$(ARCH_DATA_MODEL)"
>> endif
>> else
>> - ifeq ($(ARCH_DATA_MODEL), 32)
>> $(CD) $(OUTPUTDIR); \
>> $(MAKE) -f $(ABS_OS_MAKEFILE) \
>> $(MAKE_ARGS) $(VM_TARGET)
>> - else
>> - @$(ECHO) "No compiler1 ($(VM_TARGET)) for
>> ARCH_DATA_MODEL=$(ARCH_DATA_MODEL)"
>> endif
>> -endif
>>
>> # Build compiler2 (server) rule, different for platforms
>> generic_build2:
>> Index: make/linux/makefiles/defs.make
>> --- make/linux/makefiles/defs.make Base (BASE)
>> +++ make/linux/makefiles/defs.make Locally Modified (Based On LOCAL)
>> @@ -116,15 +116,10 @@
>>
>> # On 32 bit linux we build server and client, on 64 bit just server.
>> ifeq ($(JVM_VARIANTS),)
>> - ifeq ($(ARCH_DATA_MODEL), 32)
>> JVM_VARIANTS:=client,server
>> JVM_VARIANT_CLIENT:=true
>> JVM_VARIANT_SERVER:=true
>> - else
>> - JVM_VARIANTS:=server
>> - JVM_VARIANT_SERVER:=true
>> endif
>> -endif
>>
>> # determine if HotSpot is being built in JDK6 or earlier version
>>
>>
>>
>> #######################################################################################
>> #######################################################################################
>> ### APPLY THIS PATCH ONTO JDK SUBFOLDER
>> ###############################################
>> #######################################################################################
>> #######################################################################################
>> Index: make/java/redist/Makefile
>> --- make/java/redist/Makefile Base (BASE)
>> +++ make/java/redist/Makefile Locally Modified (Based On LOCAL)
>> @@ -109,7 +109,6 @@
>>
>> # Hotspot client is only available on 32-bit non-Zero builds
>> ifneq ($(ZERO_BUILD), true)
>> -ifeq ($(ARCH_DATA_MODEL), 32)
>> IMPORT_LIST += $(LIB_LOCATION)/$(CLIENT_LOCATION)/$(JVM_NAME) \
>> $(LIB_LOCATION)/$(CLIENT_LOCATION)/Xusage.txt
>> ifeq ($(ENABLE_FULL_DEBUG_SYMBOLS),1)
>> @@ -126,7 +125,6 @@
>> endif
>> endif
>> endif
>> -endif
>>
>> ifeq ($(PLATFORM), windows)
>> # Windows vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
>> Windows
>> @@ -159,7 +157,6 @@
>>
>> # Add .map and .pdb files to the import path for client and kernel
>> VMs.
>> # These are only available on 32-bit windows builds.
>> -ifeq ($(ARCH_DATA_MODEL), 32)
>> ifeq ($(ENABLE_FULL_DEBUG_SYMBOLS),1)
>> ifeq ($(ZIP_DEBUGINFO_FILES),1)
>> # the import JDK may not contain .diz files
>> @@ -190,7 +187,6 @@
>> endif
>> endif
>> endif
>> -endif
>>
>> $(LIBDIR)/$(JVMLIB_NAME): $(HOTSPOT_LIB_PATH)/$(JVMLIB_NAME)
>> $(install-import-file)
>> @@ -311,7 +307,6 @@
>> endif
>>
>> ifneq ($(ZERO_BUILD), true)
>> -ifeq ($(ARCH_DATA_MODEL), 32)
>>
>> IMPORT_LIST += $(LIB_LOCATION)/$(CLIENT_LOCATION)/$(LIBJSIG_NAME)
>> ifeq ($(ENABLE_FULL_DEBUG_SYMBOLS),1)
>> @@ -423,8 +418,6 @@
>> # solaris ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>> solaris
>> endif # 32bit solaris
>>
>> -endif # 32bit
>> -
>> endif # ZERO_BUILD
>>
>> # NOT Windows ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>> NOT
>> Windows
>>
>>
>>
>>
>>
>>
>> On Thu, Dec 27, 2012 at 12:06 AM, David
>> Holmes<david.holmes at oracle.com>wrote:
>>
>>> Hi,
>>>
>>> Attachments get stripped by the mailing software. If the patches are
>>> small
>>> enough please include them inline, else post them somewhere accessible.
>>> Changes would be needed for both the old and new build systems.
>>>
>>> Thanks,
>>> David Holmes
>>>
>>>
>>> On 27/12/2012 1:56 AM, Aekold Helbrass wrote:
>>>
>>>> Hi All,
>>>>
>>>> So, last time when I asked about 64 bit ClientVM someone explained me
>>>> that
>>>> it's fully compatible, just not build.
>>>>
>>>> I've made 2 patches to build system to build 64 bit client VM for
>>>> linux.
>>>> Unfortunately I do not have windows installation to check if it works
>>>> there, but on linux it works fine, runs NetBeans without problems,
>>>> and for
>>>> NetBeans difference between 32 and 64 is huge: 4 seconds cold start
>>>> against
>>>> 13 seconds cold start.
>>>>
>>>> Please see 2 files in attachment, they should be applied to hotspot
>>>> and
>>>> jdk
>>>> repositories.
>>>>
>>>> Regards!
>>>>
>
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