On 22.10.2015, at 14:37, David T. Lewis lewis@mail.msen.com wrote:
On Thu, Oct 22, 2015 at 06:28:09AM +0000, commits@source.squeak.org wrote:
Tobias Pape uploaded a new version of Network to project The Trunk: http://source.squeak.org/trunk/Network-topa.166.mcz
==================== Summary ====================
Name: Network-topa.166 Author: topa Time: 21 October 2015, 8:26:14.656 pm UUID: d6d9910f-fa67-4c69-9a89-030c81233e90 Ancestors: Network-topa.165
UUIDGenerator
- Use new Random>>#nextBytes:into:startingAt: (needs Kernel-ul.960) for even more speed
- Fix UUIDGenerator class>>#initialize to correctly register at startup
- Do not reset default on startup but rather reseed TheRandom
Timings improved: '1,190,000 per second. 842 nanoseconds per run.' (0.25 times slower than primitive version)
This is outstanding. The UUID plugin has long been a source of problems in the VM, partly due to issues in various Linux distributions.
http://bugs.squeak.org/view.php?id=7358
Making the plugin unnecessary is a big improvement.
Thats what I thought. Probably we want to present this (Mersenne PRNG + new UUID gen) to the Pharo core developers (cc) so that we can just remove the UUID plugin from the VMs (cc vm-dev)?
Best regards -Tobias
On 22 Oct 2015, at 2:49 , Tobias Pape Das.Linux@gmx.de wrote:
On 22.10.2015, at 14:37, David T. Lewis lewis@mail.msen.com wrote:
On Thu, Oct 22, 2015 at 06:28:09AM +0000, commits@source.squeak.org wrote:
Tobias Pape uploaded a new version of Network to project The Trunk: http://source.squeak.org/trunk/Network-topa.166.mcz
==================== Summary ====================
Name: Network-topa.166 Author: topa Time: 21 October 2015, 8:26:14.656 pm UUID: d6d9910f-fa67-4c69-9a89-030c81233e90 Ancestors: Network-topa.165
UUIDGenerator
- Use new Random>>#nextBytes:into:startingAt: (needs Kernel-ul.960) for even more speed
- Fix UUIDGenerator class>>#initialize to correctly register at startup
- Do not reset default on startup but rather reseed TheRandom
Timings improved: '1,190,000 per second. 842 nanoseconds per run.' (0.25 times slower than primitive version)
This is outstanding. The UUID plugin has long been a source of problems in the VM, partly due to issues in various Linux distributions.
http://bugs.squeak.org/view.php?id=7358
Making the plugin unnecessary is a big improvement.
Thats what I thought. Probably we want to present this (Mersenne PRNG + new UUID gen) to the Pharo core developers (cc) so that we can just remove the UUID plugin from the VMs (cc vm-dev)?
Best regards -Tobias
In the release version of Squeak 5.0, the Mersenne Twister is initialized using a single seed restricted to 32bit. Has this been changed since to use a wider ranged value? Otherwise, you run into problems with potential collisions from separate image starts rather too fast for UUID uses... (IMHO)
Cheers, Henry
On Thu, 22 Oct 2015, Henrik Johansen wrote:
On 22 Oct 2015, at 2:49 , Tobias Pape Das.Linux@gmx.de wrote:
On 22.10.2015, at 14:37, David T. Lewis lewis@mail.msen.com wrote:
On Thu, Oct 22, 2015 at 06:28:09AM +0000, commits@source.squeak.org wrote:
Tobias Pape uploaded a new version of Network to project The Trunk: http://source.squeak.org/trunk/Network-topa.166.mcz
==================== Summary ====================
Name: Network-topa.166 Author: topa Time: 21 October 2015, 8:26:14.656 pm UUID: d6d9910f-fa67-4c69-9a89-030c81233e90 Ancestors: Network-topa.165
UUIDGenerator
- Use new Random>>#nextBytes:into:startingAt: (needs Kernel-ul.960) for even more speed
- Fix UUIDGenerator class>>#initialize to correctly register at startup
- Do not reset default on startup but rather reseed TheRandom
Timings improved: '1,190,000 per second. 842 nanoseconds per run.' (0.25 times slower than primitive version)
This is outstanding. The UUID plugin has long been a source of problems in the VM, partly due to issues in various Linux distributions.
http://bugs.squeak.org/view.php?id=7358
Making the plugin unnecessary is a big improvement.
Thats what I thought. Probably we want to present this (Mersenne PRNG + new UUID gen) to the Pharo core developers (cc) so that we can just remove the UUID plugin from the VMs (cc vm-dev)?
Best regards -Tobias
In the release version of Squeak 5.0, the Mersenne Twister is initialized using a single seed restricted to 32bit. Has this been changed since to use a wider ranged value? Otherwise, you run into problems with potential collisions from separate image starts rather too fast for UUID uses... (IMHO)
No, that's still something to be done[1].
Levente
[1] http://lists.squeakfoundation.org/pipermail/squeak-dev/2015-October/186409.h...
Cheers, Henry
thanks Tobias. Getting lighter is always good. Stef
Le 22/10/15 14:49, Tobias Pape a écrit :
On 22.10.2015, at 14:37, David T. Lewis lewis@mail.msen.com wrote:
On Thu, Oct 22, 2015 at 06:28:09AM +0000, commits@source.squeak.org wrote:
Tobias Pape uploaded a new version of Network to project The Trunk: http://source.squeak.org/trunk/Network-topa.166.mcz
==================== Summary ====================
Name: Network-topa.166 Author: topa Time: 21 October 2015, 8:26:14.656 pm UUID: d6d9910f-fa67-4c69-9a89-030c81233e90 Ancestors: Network-topa.165
UUIDGenerator
- Use new Random>>#nextBytes:into:startingAt: (needs Kernel-ul.960) for even more speed
- Fix UUIDGenerator class>>#initialize to correctly register at startup
- Do not reset default on startup but rather reseed TheRandom
Timings improved: '1,190,000 per second. 842 nanoseconds per run.' (0.25 times slower than primitive version)
This is outstanding. The UUID plugin has long been a source of problems in the VM, partly due to issues in various Linux distributions.
http://bugs.squeak.org/view.php?id=7358
Making the plugin unnecessary is a big improvement.
Thats what I thought. Probably we want to present this (Mersenne PRNG + new UUID gen) to the Pharo core developers (cc) so that we can just remove the UUID plugin from the VMs (cc vm-dev)?
Best regards -Tobias
vm-dev@lists.squeakfoundation.org
-
Henrik Johansen -
Levente Uzonyi -
stepharo -
Tobias Pape