Re: configuring with --with-jvm-variants=minimal,server makes cds disappear in server
On 2020-01-16 10:48, Ioi Lam wrote: On 1/16/20 9:09 AM, Erik Joelsson wrote: I would lean towards changing the check from "if any of the variants do not support CDS, disable it" to "if any of the variants support CDS, enable it". The cds jvm feature is only added to the variants that support it anyway. If you do this, you probably need to figure out how to explicitly only generate the archive for the supported jvm variants in Images.gmk too. Not sure if the archive is jvm variant dependent or if the layout even supports multiple variants. It will likely get messy. The CDS archive is dependent on the exact libjvm.so, so each JDK image should creates its own CDS archive during the build. I think this can be handled emitting a different value for "BUILD_CDS_ARCHIVE" in the spec.gmk of each variant. Building with multiple JVM variants does not create separate JDK images, the libjvm.so files simply end up in: lib/server/libjvm.so lib/minimal/libjvm.so I don't think the default archive takes that into account. /Erik Thanks - Ioi /Erik On 2020-01-16 08:22, Baesken, Matthias wrote: Hello, thanks for looking into it . Should I do a check just looking into single JVM configs, something like AC_DEFUN([HOTSPOT_IS_JVM_VARIANT], [ [ [[ " $JVM_VARIANTS " == " $1 " ]] ] ]) if HOTSPOT_IS_JVM_VARIANT(zero) || HOTSPOT_IS_JVM_VARIANT(minimal) || HOTSPOT_IS_JVM_VARIANT(core); then instead of AC_DEFUN([HOTSPOT_CHECK_JVM_VARIANT], [ [ [[ " $JVM_VARIANTS " =~ " $1 " ]] ] ]) if HOTSPOT_CHECK_JVM_VARIANT(zero) || HOTSPOT_CHECK_JVM_VARIANT(minimal) || HOTSPOT_CHECK_JVM_VARIANT(core); then This should remove the error in case of multi-JVM configs . Or maybe the whole check ( if HOTSPOT_CHECK_JVM_VARIANT(zero) || HOTSPOT_CHECK_JVM_VARIANT(minimal) || HOTSPOT_CHECK_JVM_VARIANT(core); then fi ) might be removed , I see not so much value in it because in case one sets --enable-jvm-features directly the check isn’t done . I opened bug : https://bugs.openjdk.java.net/browse/JDK-8237374 JDK-8237374 : configuring with --with-jvm-variants=minimal,server makes cds disappear in server Best regards, Matthias This does indeed look like a bug to me. At least at Oracle, we no longer build any multi JVM configs regularly, so things like this falls through the cracks. /Erik On 2020-01-16 02:18, Baesken, Matthias wrote: Hello, I noticed the following strange "feature" (or is it a bug?) . When building 2 VM variants in one build and using --with-jvm-variants=minimal,server For this, the build works nicely. But I notice that in the server VM, cds is removed. Instead of checking if cds should be enabled... yes I get ( with the following patch that adds tracing) : configure: WARNING: ENABLE_CDS set to false because we found a minimal, core or zero JVM. checking if cds should be enabled... no ... * JVM features: minimal: 'compiler1 minimal serialgc' server: 'compiler1 compiler2 epsilongc g1gc jfr jni-check jvmti management nmt parallelgc serialgc services vm-structs' (patch is --- a/make/autoconf/hotspot.m4 Wed Jan 15 21:20:40 2020 -0800 +++ b/make/autoconf/hotspot.m4 Thu Jan 16 10:24:43 2020 +0100 @@ -528,6 +528,7 @@ if HOTSPOT_CHECK_JVM_VARIANT(zero) || HOTSPOT_CHECK_JVM_VARIANT(minimal) || HOTSPOT_CHECK_JVM_VARIANT(core); then # ..except when the user explicitely requested it with --enable-jvm- features if ! HOTSPOT_CHECK_JVM_FEATURE(cds); then ENABLE_CDS="false" + AC_MSG_WARN([ENABLE_CDS set to false because we found a minimal, core or zero JVM.]) if test "x$enable_cds" = "xyes"; then AC_MSG_ERROR([CDS not implemented for variants zero, minimal, core. Remove --enable-cds.]) Fi Is it expected that cds goes away in "server" when configuring "--with- jvm-variants=minimal,server" ? Looks like a bug to me, should it be fixed (so that cds stays in the server jvm-feature list) ? Thanks, Matthias
Re: configuring with --with-jvm-variants=minimal,server makes cds disappear in server
On 1/16/20 9:09 AM, Erik Joelsson wrote: I would lean towards changing the check from "if any of the variants do not support CDS, disable it" to "if any of the variants support CDS, enable it". The cds jvm feature is only added to the variants that support it anyway. If you do this, you probably need to figure out how to explicitly only generate the archive for the supported jvm variants in Images.gmk too. Not sure if the archive is jvm variant dependent or if the layout even supports multiple variants. It will likely get messy. The CDS archive is dependent on the exact libjvm.so, so each JDK image should creates its own CDS archive during the build. I think this can be handled emitting a different value for "BUILD_CDS_ARCHIVE" in the spec.gmk of each variant. Thanks - Ioi /Erik On 2020-01-16 08:22, Baesken, Matthias wrote: Hello, thanks for looking into it . Should I do a check just looking into single JVM configs, something like AC_DEFUN([HOTSPOT_IS_JVM_VARIANT], [ [ [[ " $JVM_VARIANTS " == " $1 " ]] ] ]) if HOTSPOT_IS_JVM_VARIANT(zero) || HOTSPOT_IS_JVM_VARIANT(minimal) || HOTSPOT_IS_JVM_VARIANT(core); then instead of AC_DEFUN([HOTSPOT_CHECK_JVM_VARIANT], [ [ [[ " $JVM_VARIANTS " =~ " $1 " ]] ] ]) if HOTSPOT_CHECK_JVM_VARIANT(zero) || HOTSPOT_CHECK_JVM_VARIANT(minimal) || HOTSPOT_CHECK_JVM_VARIANT(core); then This should remove the error in case of multi-JVM configs . Or maybe the whole check ( if HOTSPOT_CHECK_JVM_VARIANT(zero) || HOTSPOT_CHECK_JVM_VARIANT(minimal) || HOTSPOT_CHECK_JVM_VARIANT(core); then fi ) might be removed , I see not so much value in it because in case one sets --enable-jvm-features directly the check isn’t done . I opened bug : https://bugs.openjdk.java.net/browse/JDK-8237374 JDK-8237374 : configuring with --with-jvm-variants=minimal,server makes cds disappear in server Best regards, Matthias This does indeed look like a bug to me. At least at Oracle, we no longer build any multi JVM configs regularly, so things like this falls through the cracks. /Erik On 2020-01-16 02:18, Baesken, Matthias wrote: Hello, I noticed the following strange "feature" (or is it a bug?) . When building 2 VM variants in one build and using --with-jvm-variants=minimal,server For this, the build works nicely. But I notice that in the server VM, cds is removed. Instead of checking if cds should be enabled... yes I get ( with the following patch that adds tracing) : configure: WARNING: ENABLE_CDS set to false because we found a minimal, core or zero JVM. checking if cds should be enabled... no ... * JVM features: minimal: 'compiler1 minimal serialgc' server: 'compiler1 compiler2 epsilongc g1gc jfr jni-check jvmti management nmt parallelgc serialgc services vm-structs' (patch is --- a/make/autoconf/hotspot.m4 Wed Jan 15 21:20:40 2020 -0800 +++ b/make/autoconf/hotspot.m4 Thu Jan 16 10:24:43 2020 +0100 @@ -528,6 +528,7 @@ if HOTSPOT_CHECK_JVM_VARIANT(zero) || HOTSPOT_CHECK_JVM_VARIANT(minimal) || HOTSPOT_CHECK_JVM_VARIANT(core); then # ..except when the user explicitely requested it with --enable-jvm- features if ! HOTSPOT_CHECK_JVM_FEATURE(cds); then ENABLE_CDS="false" + AC_MSG_WARN([ENABLE_CDS set to false because we found a minimal, core or zero JVM.]) if test "x$enable_cds" = "xyes"; then AC_MSG_ERROR([CDS not implemented for variants zero, minimal, core. Remove --enable-cds.]) Fi Is it expected that cds goes away in "server" when configuring "--with- jvm-variants=minimal,server" ? Looks like a bug to me, should it be fixed (so that cds stays in the server jvm-feature list) ? Thanks, Matthias
Re: configuring with --with-jvm-variants=minimal,server makes cds disappear in server
I would lean towards changing the check from "if any of the variants do not support CDS, disable it" to "if any of the variants support CDS, enable it". The cds jvm feature is only added to the variants that support it anyway. If you do this, you probably need to figure out how to explicitly only generate the archive for the supported jvm variants in Images.gmk too. Not sure if the archive is jvm variant dependent or if the layout even supports multiple variants. It will likely get messy. /Erik On 2020-01-16 08:22, Baesken, Matthias wrote: Hello, thanks for looking into it . Should I do a check just looking into single JVM configs, something like AC_DEFUN([HOTSPOT_IS_JVM_VARIANT], [ [ [[ " $JVM_VARIANTS " == " $1 " ]] ] ]) if HOTSPOT_IS_JVM_VARIANT(zero) || HOTSPOT_IS_JVM_VARIANT(minimal) || HOTSPOT_IS_JVM_VARIANT(core); then instead of AC_DEFUN([HOTSPOT_CHECK_JVM_VARIANT], [ [ [[ " $JVM_VARIANTS " =~ " $1 " ]] ] ]) if HOTSPOT_CHECK_JVM_VARIANT(zero) || HOTSPOT_CHECK_JVM_VARIANT(minimal) || HOTSPOT_CHECK_JVM_VARIANT(core); then This should remove the error in case of multi-JVM configs . Or maybe the whole check ( if HOTSPOT_CHECK_JVM_VARIANT(zero) || HOTSPOT_CHECK_JVM_VARIANT(minimal) || HOTSPOT_CHECK_JVM_VARIANT(core); then fi ) might be removed , I see not so much value in it because in case one sets --enable-jvm-features directly the check isn’t done . I opened bug : https://bugs.openjdk.java.net/browse/JDK-8237374 JDK-8237374 : configuring with --with-jvm-variants=minimal,server makes cds disappear in server Best regards, Matthias This does indeed look like a bug to me. At least at Oracle, we no longer build any multi JVM configs regularly, so things like this falls through the cracks. /Erik On 2020-01-16 02:18, Baesken, Matthias wrote: Hello, I noticed the following strange "feature" (or is it a bug?) . When building 2 VM variants in one build and using --with-jvm-variants=minimal,server For this, the build works nicely. But I notice that in the server VM, cds is removed. Instead of checking if cds should be enabled... yes I get ( with the following patch that adds tracing) : configure: WARNING: ENABLE_CDS set to false because we found a minimal, core or zero JVM. checking if cds should be enabled... no ... * JVM features: minimal: 'compiler1 minimal serialgc' server: 'compiler1 compiler2 epsilongc g1gc jfr jni-check jvmti management nmt parallelgc serialgc services vm-structs' (patch is --- a/make/autoconf/hotspot.m4 Wed Jan 15 21:20:40 2020 -0800 +++ b/make/autoconf/hotspot.m4 Thu Jan 16 10:24:43 2020 +0100 @@ -528,6 +528,7 @@ if HOTSPOT_CHECK_JVM_VARIANT(zero) || HOTSPOT_CHECK_JVM_VARIANT(minimal) || HOTSPOT_CHECK_JVM_VARIANT(core); then # ..except when the user explicitely requested it with --enable-jvm- features if ! HOTSPOT_CHECK_JVM_FEATURE(cds); then ENABLE_CDS="false" + AC_MSG_WARN([ENABLE_CDS set to false because we found a minimal, core or zero JVM.]) if test "x$enable_cds" = "xyes"; then AC_MSG_ERROR([CDS not implemented for variants zero, minimal, core. Remove --enable-cds.]) Fi Is it expected that cds goes away in "server" when configuring "--with- jvm-variants=minimal,server" ? Looks like a bug to me, should it be fixed (so that cds stays in the server jvm-feature list) ? Thanks, Matthias
RE: configuring with --with-jvm-variants=minimal,server makes cds disappear in server
Hello, thanks for looking into it . Should I do a check just looking into single JVM configs, something like AC_DEFUN([HOTSPOT_IS_JVM_VARIANT], [ [ [[ " $JVM_VARIANTS " == " $1 " ]] ] ]) if HOTSPOT_IS_JVM_VARIANT(zero) || HOTSPOT_IS_JVM_VARIANT(minimal) || HOTSPOT_IS_JVM_VARIANT(core); then instead of AC_DEFUN([HOTSPOT_CHECK_JVM_VARIANT], [ [ [[ " $JVM_VARIANTS " =~ " $1 " ]] ] ]) if HOTSPOT_CHECK_JVM_VARIANT(zero) || HOTSPOT_CHECK_JVM_VARIANT(minimal) || HOTSPOT_CHECK_JVM_VARIANT(core); then This should remove the error in case of multi-JVM configs . Or maybe the whole check ( if HOTSPOT_CHECK_JVM_VARIANT(zero) || HOTSPOT_CHECK_JVM_VARIANT(minimal) || HOTSPOT_CHECK_JVM_VARIANT(core); then fi ) might be removed , I see not so much value in it because in case one sets --enable-jvm-features directly the check isn’t done . I opened bug : https://bugs.openjdk.java.net/browse/JDK-8237374 JDK-8237374 : configuring with --with-jvm-variants=minimal,server makes cds disappear in server Best regards, Matthias > > This does indeed look like a bug to me. At least at Oracle, we no longer > build any multi JVM configs regularly, so things like this falls through > the cracks. > > /Erik > > On 2020-01-16 02:18, Baesken, Matthias wrote: > > Hello, I noticed the following strange "feature" (or is it a bug?) . > > When building 2 VM variants in one build and using > > > >--with-jvm-variants=minimal,server > > > > For this, the build works nicely. But I notice that in the server VM, cds > > is > removed. > > Instead of > > > > checking if cds should be enabled... yes > > > > I get ( with the following patch that adds tracing) : > > > > configure: WARNING: ENABLE_CDS set to false because we found a > minimal, core or zero JVM. > > checking if cds should be enabled... no > >... > > > > * JVM features: minimal: 'compiler1 minimal serialgc' server: > > 'compiler1 > compiler2 epsilongc g1gc jfr jni-check jvmti management nmt parallelgc > serialgc services vm-structs' > > > > (patch is > > > > --- a/make/autoconf/hotspot.m4 Wed Jan 15 21:20:40 2020 -0800 > > +++ b/make/autoconf/hotspot.m4 Thu Jan 16 10:24:43 2020 +0100 > > @@ -528,6 +528,7 @@ > >if HOTSPOT_CHECK_JVM_VARIANT(zero) || > HOTSPOT_CHECK_JVM_VARIANT(minimal) || > HOTSPOT_CHECK_JVM_VARIANT(core); then > > # ..except when the user explicitely requested it with --enable-jvm- > features > > if ! HOTSPOT_CHECK_JVM_FEATURE(cds); then > > ENABLE_CDS="false" > > + AC_MSG_WARN([ENABLE_CDS set to false because we found a > minimal, core or zero JVM.]) > > if test "x$enable_cds" = "xyes"; then > > AC_MSG_ERROR([CDS not implemented for variants zero, minimal, > core. Remove --enable-cds.]) > > Fi > > > > > > Is it expected that cds goes away in "server" when configuring "--with- > jvm-variants=minimal,server" ? Looks like a bug to me, should it be fixed > (so that cds stays in the server jvm-feature list) ? > > > > > > Thanks, Matthias > >
Re: configuring with --with-jvm-variants=minimal,server makes cds disappear in server
This does indeed look like a bug to me. At least at Oracle, we no longer build any multi JVM configs regularly, so things like this falls through the cracks. /Erik On 2020-01-16 02:18, Baesken, Matthias wrote: Hello, I noticed the following strange "feature" (or is it a bug?) . When building 2 VM variants in one build and using --with-jvm-variants=minimal,server For this, the build works nicely. But I notice that in the server VM, cds is removed. Instead of checking if cds should be enabled... yes I get ( with the following patch that adds tracing) : configure: WARNING: ENABLE_CDS set to false because we found a minimal, core or zero JVM. checking if cds should be enabled... no ... * JVM features: minimal: 'compiler1 minimal serialgc' server: 'compiler1 compiler2 epsilongc g1gc jfr jni-check jvmti management nmt parallelgc serialgc services vm-structs' (patch is --- a/make/autoconf/hotspot.m4 Wed Jan 15 21:20:40 2020 -0800 +++ b/make/autoconf/hotspot.m4 Thu Jan 16 10:24:43 2020 +0100 @@ -528,6 +528,7 @@ if HOTSPOT_CHECK_JVM_VARIANT(zero) || HOTSPOT_CHECK_JVM_VARIANT(minimal) || HOTSPOT_CHECK_JVM_VARIANT(core); then # ..except when the user explicitely requested it with --enable-jvm-features if ! HOTSPOT_CHECK_JVM_FEATURE(cds); then ENABLE_CDS="false" + AC_MSG_WARN([ENABLE_CDS set to false because we found a minimal, core or zero JVM.]) if test "x$enable_cds" = "xyes"; then AC_MSG_ERROR([CDS not implemented for variants zero, minimal, core. Remove --enable-cds.]) Fi Is it expected that cds goes away in "server" when configuring "--with-jvm-variants=minimal,server" ? Looks like a bug to me, should it be fixed (so that cds stays in the server jvm-feature list) ? Thanks, Matthias
