On Thu, 22 Jul 2021 14:58:47 GMT, Thomas Stuefe wrote:
> Short: this patch makes NMT available in custom-launcher scenarios and during
> gtests. It simplifies NMT initialization. It adds a lot of NMT-specific
> testing, cleans them up and makes them sideeffect-free.
>
> -
>
> NMT
On Fri, 30 Jul 2021 18:28:44 GMT, Zhengyu Gu wrote:
>> So, you are saying that there is no memory that is malloc'd pre-NMT-init
>> phase and freed post-NMT-init phase?
>
> Okay, I see. It just leaks those memory, so the table can be read-only.
Exactly. There are a few allocs that either get
On Fri, 30 Jul 2021 16:36:41 GMT, Thomas Stuefe wrote:
>> src/hotspot/share/services/nmtPreInit.hpp line 309:
>>
>>> 307: ::memcpy(p_new, a->payload(), MIN2(a->size, new_size));
>>> 308: (*rc) = p_new;
>>> 309: _num_reallocs_pre_to_post++;
>>
>> post-NMT-init counter
On Fri, 30 Jul 2021 16:33:17 GMT, Zhengyu Gu wrote:
>> The code is implicitly thread-safe because the hashmap is only modified in
>> the pre-NMT-init phase. After NMT initialization, the table is read-only.
>> During pre-NMT-init we are effectively single-threaded - at most two threads
>>
> Hi,
>
> As discussed in the
> https://mail.openjdk.java.net/pipermail/core-libs-dev/2021-July/079621.html
> thread, this is the revised patch to address the use of '.' and '..' within
> Zip FS
>
> Zip FS needs to use "." and ".." as links to the current and parent
> directories and cannot
On Fri, 30 Jul 2021 15:43:52 GMT, Lance Andersen wrote:
>> Hi,
>>
>> As discussed in the
>> https://mail.openjdk.java.net/pipermail/core-libs-dev/2021-July/079621.html
>> thread, this is the revised patch to address the use of '.' and '..' within
>> Zip FS
>>
>> Zip FS needs to use "." and
On Fri, 30 Jul 2021 16:28:54 GMT, Thomas Stuefe wrote:
>> src/hotspot/share/services/nmtPreInit.hpp line 202:
>>
>>> 200: assert((*aa) != NULL, "Entry not found: " PTR_FORMAT, p2i(p));
>>> 201: NMTPreInitAllocation* a = (*aa);
>>> 202: (*aa) = (*aa)->next; // remove from its
On Fri, 30 Jul 2021 13:03:32 GMT, Zhengyu Gu wrote:
> Sorry for late review.
>
> Did a quick scan and have a few questions, will do more detail reading later.
Thanks a lot, I appreciate your feedback!
> src/hotspot/share/services/nmtPreInit.hpp line 108:
>
>> 106: // - lookup speed is
On Fri, 30 Jul 2021 12:56:59 GMT, Zhengyu Gu wrote:
>> Short: this patch makes NMT available in custom-launcher scenarios and
>> during gtests. It simplifies NMT initialization. It adds a lot of
>> NMT-specific testing, cleans them up and makes them sideeffect-free.
>>
>> -
>>
>> NMT
On Fri, 23 Jul 2021 18:03:31 GMT, Sergey Chernyshev
wrote:
> Dear colleagues,
>
> Please review the patch that replaces the lambdas with anonymous classes
> which solves the startup time regression as shown below.
>
> I attached the Bytestacks flamegraphs for both original (regression) and
On Fri, 30 Jul 2021 11:24:37 GMT, Alan Bateman wrote:
>> src/jdk.zipfs/share/classes/module-info.java line 49:
>>
>>> 47: *
>>> 48: * @implNote The Zip File System will throw a ZipException when opening
>>> an
>>> 49: * existing Zip file that contains Zip entries with "." or ".." in its
> Hi,
>
> As discussed in the
> https://mail.openjdk.java.net/pipermail/core-libs-dev/2021-July/079621.html
> thread, this is the revised patch to address the use of '.' and '..' within
> Zip FS
>
> Zip FS needs to use "." and ".." as links to the current and parent
> directories and cannot
On Thu, 29 Jul 2021 01:30:37 GMT, Vladimir Kozlov wrote:
>> Hi all,
>>
>> could you please review this big tedious and trivial(-ish) patch which moves
>> `sun.hotspot.WhiteBox` and related classes to `jdk.test.whitebox` package?
>>
>> the majority of the patch is the following substitutions:
On Thu, 22 Jul 2021 14:58:47 GMT, Thomas Stuefe wrote:
> Short: this patch makes NMT available in custom-launcher scenarios and during
> gtests. It simplifies NMT initialization. It adds a lot of NMT-specific
> testing, cleans them up and makes them sideeffect-free.
>
> -
>
> NMT
On Fri, 23 Jul 2021 18:03:31 GMT, Sergey Chernyshev
wrote:
> Dear colleagues,
>
> Please review the patch that replaces the lambdas with anonymous classes
> which solves the startup time regression as shown below.
>
> I attached the Bytestacks flamegraphs for both original (regression) and
On Thu, 29 Jul 2021 19:57:30 GMT, Markus KARG
wrote:
>> Good point.
>
> :-)
Is this loop correct for the case that the channel gets truncated? In that case
transferTo will return 0 as no bytes will be transferred and I'm concerned this
code will go into an infinite loop.
Also can you can
On Fri, 30 Jul 2021 10:36:01 GMT, Andrew Haley wrote:
>
> I was (still am) tempted to approve it, but Nick says there are still bugs in
> corner cases.
>
I meant the earlier String.compareTo that this is partially replacing. This one
might be fine but I just wanted to check it had be
On Fri, 30 Jul 2021 01:43:56 GMT, Jaikiran Pai wrote:
>> Lance Andersen has updated the pull request with a new target base due to a
>> merge or a rebase. The incremental webrev excludes the unrelated changes
>> brought in by the merge/rebase. The pull request contains six additional
>>
On Fri, 30 Jul 2021 04:09:32 GMT, Kim Barrett wrote:
>> src/hotspot/share/services/nmtPreInit.hpp line 166:
>>
>>> 164: NMTPreInitAllocation** find_entry(const void* p) const {
>>> 165: const unsigned index = index_for_key(p);
>>> 166: NMTPreInitAllocation** aa =
On 7/30/21 7:49 AM, Wu Yan wrote:
> I aggree. This is the compromise solution that the optimization
> has no effect (or even slowdown) on some platforms.
> In addition, I found that in
> [JDK-8202326](https://bugs.openjdk.java.net/browse/JDK-8202326),
> adding prefetches is only for long strings
On Thu, 29 Jul 2021 23:03:46 GMT, Coleen Phillimore wrote:
> This is an interesting and it seems a better way to solve this problem. Where
> were you all those years ago?? I hope @zhengyu123 has a chance to review it.
Thank you! I was here, but we were not yet doing much upstream :) To be
On Thu, 29 Jul 2021 06:37:36 GMT, David Holmes wrote:
> Hi Thomas,
>
> I had a look through this and it seems reasonable, but I'm not familiar
> enough with the details to approve at this stage.
>
> A few nits below.
>
> Thanks,
> David
I did not expect a quick review for this one, so
On Fri, 30 Jul 2021 04:03:57 GMT, Kim Barrett wrote:
>> src/hotspot/share/services/nmtPreInit.hpp line 128:
>>
>>> 126: // Returns start of the user data area
>>> 127: void* payload() { return this + 1; }
>>> 128: const void* payload() const { return this + 1; }
>>
>> This is
Hi Hans,
> -Original Message-
> From: core-libs-dev On Behalf Of
> Hans Boehm
> Sent: Friday, 30 July 2021 00:07
> To: core-libs-dev
> Subject: PhantomReferences
>
> Here's another finalization-related issue, this time hopefully appropriate for
> this list. This was inspired by looking
On Wed, 28 Jul 2021 09:55:18 GMT, Nick Gasson wrote:
> Adding prefetches was one of the reasons to introduce the separate stub for
> long strings, see the mail below:
>
> https://mail.openjdk.java.net/pipermail/hotspot-compiler-dev/2018-April/02.html
Thank you for pointing this out, we
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