On Thu, 1 Jun 2023 09:37:29 GMT, Aleksey Shipilev wrote:
>> UUID is the very important class that is used to track identities of objects
>> in large scale systems. On some of our systems, `UUID.randomUUID` takes >1%
>> of total CPU time, and is frequently a scalability bottleneck due to
>> `Se
On Thu, 1 Jun 2023 09:37:29 GMT, Aleksey Shipilev wrote:
>> UUID is the very important class that is used to track identities of objects
>> in large scale systems. On some of our systems, `UUID.randomUUID` takes >1%
>> of total CPU time, and is frequently a scalability bottleneck due to
>> `Se
On Thu, 1 Jun 2023 12:59:14 GMT, Brett Okken wrote:
>> Aleksey Shipilev has updated the pull request with a new target base due to
>> a merge or a rebase. The pull request now contains 13 commits:
>>
>> - Revert test changes
>> - Merge branch 'master' into JDK-8308804-uuid-buffers
>> - Simpl
On Thu, 1 Jun 2023 09:37:29 GMT, Aleksey Shipilev wrote:
>> UUID is the very important class that is used to track identities of objects
>> in large scale systems. On some of our systems, `UUID.randomUUID` takes >1%
>> of total CPU time, and is frequently a scalability bottleneck due to
>> `Se
> UUID is the very important class that is used to track identities of objects
> in large scale systems. On some of our systems, `UUID.randomUUID` takes >1%
> of total CPU time, and is frequently a scalability bottleneck due to
> `SecureRandom` synchronization.
>
> The major issue with UUID cod
> UUID is the very important class that is used to track identities of objects
> in large scale systems. On some of our systems, `UUID.randomUUID` takes >1%
> of total CPU time, and is frequently a scalability bottleneck due to
> `SecureRandom` synchronization.
>
> The major issue with UUID cod
On Fri, 26 May 2023 15:30:29 GMT, Roger Riggs wrote:
>> Yes, I used them for testing, but left them in, because it would be
>> convenient to have them around for field tuning and diagnostics. This would
>> require a CSR, right?
>
> I don't think there is a strong case for adding the system prop
On Fri, 26 May 2023 15:30:29 GMT, Roger Riggs wrote:
>> Yes, I used them for testing, but left them in, because it would be
>> convenient to have them around for field tuning and diagnostics. This would
>> require a CSR, right?
>
> I don't think there is a strong case for adding the system prop
> UUID is the very important class that is used to track identities of objects
> in large scale systems. On some of our systems, `UUID.randomUUID` takes >1%
> of total CPU time, and is frequently a scalability bottleneck due to
> `SecureRandom` synchronization.
>
> The major issue with UUID cod
On Thu, 25 May 2023 14:04:35 GMT, Aleksey Shipilev wrote:
>> src/java.base/share/classes/java/util/UUID.java line 149:
>>
>>> 147: } else {
>>> 148: try {
>>> 149: return SecureRandom.getInstance(PRNG_NAME);
>>
>> Part of the change here is that t
On Fri, 26 May 2023 12:01:50 GMT, Andrei Pangin wrote:
>> Aleksey Shipilev has updated the pull request incrementally with one
>> additional commit since the last revision:
>>
>> Fine-tune exceptions
>
> src/java.base/share/classes/java/util/UUID.java line 226:
>
>> 224: // s
> UUID is the very important class that is used to track identities of objects
> in large scale systems. On some of our systems, `UUID.randomUUID` takes >1%
> of total CPU time, and is frequently a scalability bottleneck due to
> `SecureRandom` synchronization.
>
> The major issue with UUID cod
On Fri, 26 May 2023 11:43:11 GMT, Aleksey Shipilev wrote:
>> UUID is the very important class that is used to track identities of objects
>> in large scale systems. On some of our systems, `UUID.randomUUID` takes >1%
>> of total CPU time, and is frequently a scalability bottleneck due to
>> `S
On Fri, 26 May 2023 08:36:46 GMT, Aleksey Shipilev wrote:
>> src/java.base/share/classes/java/util/UUID.java line 224:
>>
>>> 222: // Try to pull the UUID from the current buffer at
>>> current position.
>>> 223: if (stamp != 0) {
>>> 224:
On Fri, 26 May 2023 11:24:10 GMT, Daniel Fuchs wrote:
>> Aleksey Shipilev has updated the pull request incrementally with two
>> additional commits since the last revision:
>>
>> - Handle privileged properties
>> - Use ByteArray to convert. Do version/variant preparations straight on
>> loca
> UUID is the very important class that is used to track identities of objects
> in large scale systems. On some of our systems, `UUID.randomUUID` takes >1%
> of total CPU time, and is frequently a scalability bottleneck due to
> `SecureRandom` synchronization.
>
> The major issue with UUID cod
On Fri, 26 May 2023 09:51:47 GMT, Aleksey Shipilev wrote:
>> UUID is the very important class that is used to track identities of objects
>> in large scale systems. On some of our systems, `UUID.randomUUID` takes >1%
>> of total CPU time, and is frequently a scalability bottleneck due to
>> `S
On Fri, 26 May 2023 08:37:49 GMT, Aleksey Shipilev wrote:
>> `jdk.internal.util.ByteArray` has VarHandle-based methods ready for that
>
> Yes, I have that optimization in the pipeline, and wanted to do so
> separately. I can still fold it here, let me see.
Did so in new commit.
-
On Thu, 25 May 2023 12:17:27 GMT, Alan Bateman wrote:
>> Aleksey Shipilev has updated the pull request incrementally with two
>> additional commits since the last revision:
>>
>> - Handle privileged properties
>> - Use ByteArray to convert. Do version/variant preparations straight on
>> loca
> UUID is the very important class that is used to track identities of objects
> in large scale systems. On some of our systems, `UUID.randomUUID` takes >1%
> of total CPU time, and is frequently a scalability bottleneck due to
> `SecureRandom` synchronization.
>
> The major issue with UUID cod
On Fri, 26 May 2023 08:39:10 GMT, Aleksey Shipilev wrote:
>> src/java.base/share/classes/java/util/UUID.java line 260:
>>
>>> 258: buf[c + 8] &= 0x3f; /* clear variant*/
>>> 259: buf[c + 8] |= (byte) 0x80; /* set to IETF
>>> variant */
On Fri, 26 May 2023 00:16:19 GMT, Andrei Pangin wrote:
>> UUID is the very important class that is used to track identities of objects
>> in large scale systems. On some of our systems, `UUID.randomUUID` takes >1%
>> of total CPU time, and is frequently a scalability bottleneck due to
>> `Secu
On Fri, 26 May 2023 06:47:29 GMT, Hannes Greule wrote:
>> src/java.base/share/classes/java/util/UUID.java line 286:
>>
>>> 284: long lsb = 0;
>>> 285: for (int i = start; i < start + 8; i++) {
>>> 286: msb = (msb << 8) | (data[i] & 0xff);
>>
>> Can we use VarHandle/B
On Fri, 26 May 2023 00:50:04 GMT, Brett Okken wrote:
>> UUID is the very important class that is used to track identities of objects
>> in large scale systems. On some of our systems, `UUID.randomUUID` takes >1%
>> of total CPU time, and is frequently a scalability bottleneck due to
>> `Secure
On Fri, 26 May 2023 00:13:57 GMT, Andrei Pangin wrote:
>> UUID is the very important class that is used to track identities of objects
>> in large scale systems. On some of our systems, `UUID.randomUUID` takes >1%
>> of total CPU time, and is frequently a scalability bottleneck due to
>> `Secu
On Thu, 25 May 2023 23:54:14 GMT, Andrei Pangin wrote:
>> UUID is the very important class that is used to track identities of objects
>> in large scale systems. On some of our systems, `UUID.randomUUID` takes >1%
>> of total CPU time, and is frequently a scalability bottleneck due to
>> `Secu
On Wed, 24 May 2023 19:36:44 GMT, Aleksey Shipilev wrote:
> UUID is the very important class that is used to track identities of objects
> in large scale systems. On some of our systems, `UUID.randomUUID` takes >1%
> of total CPU time, and is frequently a scalability bottleneck due to
> `Secur
On Wed, 24 May 2023 19:36:44 GMT, Aleksey Shipilev wrote:
> UUID is the very important class that is used to track identities of objects
> in large scale systems. On some of our systems, `UUID.randomUUID` takes >1%
> of total CPU time, and is frequently a scalability bottleneck due to
> `Secur
On Thu, 25 May 2023 14:01:43 GMT, Alan Bateman wrote:
>> UUID is the very important class that is used to track identities of objects
>> in large scale systems. On some of our systems, `UUID.randomUUID` takes >1%
>> of total CPU time, and is frequently a scalability bottleneck due to
>> `Secur
On Wed, 24 May 2023 19:36:44 GMT, Aleksey Shipilev wrote:
> UUID is the very important class that is used to track identities of objects
> in large scale systems. On some of our systems, `UUID.randomUUID` takes >1%
> of total CPU time, and is frequently a scalability bottleneck due to
> `Secur
On Wed, 24 May 2023 19:36:44 GMT, Aleksey Shipilev wrote:
> UUID is the very important class that is used to track identities of objects
> in large scale systems. On some of our systems, `UUID.randomUUID` takes >1%
> of total CPU time, and is frequently a scalability bottleneck due to
> `Secur
UUID is the very important class that is used to track identities of objects in
large scale systems. On some of our systems, `UUID.randomUUID` takes >1% of
total CPU time, and is frequently a scalability bottleneck due to
`SecureRandom` synchronization.
The major issue with UUID code itself is
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