Am 28.10.2010 10:02, schrieb Jeppe Johansen: > Den 27-10-2010 23:14, Florian Klämpfl skrev: >> Am 27.10.2010 22:52, schrieb Andrew Brunner: >>> My SCS project which is a scalable unified collaboration and >>> communication server that uses counting for transactions and network >>> consumption across all implemented protocols. Bytes, when aggregated >>> can clearly exceed the 2GB limitation within seconds. Partial >>> transactions (PTX) can exceed over 30,000 per second and full >>> transactions (TX) are typically 50% of that... But these numbers need >>> to add up. Meaning the aggregate TX count must be of some proportion >>> of the PTX otherwise they are bogus. >>> >>> Int64 or QWord w/o locking or CAS is a serious issue for me. I >>> absolutely need this feature or my transaction/byte counts will be off >>> per node per cluster and can lead to misinformation in the consumption >>> reports. >>> >>> For the time being though I can restrict the scale on i386 >>> architecture since I tried to re-map the methods in the system.inc >>> file to no avail. It appears that FPC does not include the >>> Interlocked*64 methods inside the RTL. >> I propose to add the 64 bit CAS for all 32 bit archs (if available): the >> 64 bit CAS instruction on a 32 bit target makes makes a lot "lock-free" >> algorithms simpler. >> >> So you can build your 64 bit interlockedincrement yourself (there is no >> native on any 32 bit target I'am aware of). >> _______________________________________________ >> fpc-devel maillist - fpc-devel@lists.freepascal.org >> http://lists.freepascal.org/mailman/listinfo/fpc-devel > CMPXCHG8B works on probably most x86 architectures
Yes. That's what I wrote ;) because there is no interlockedincrement, one can use the 64 Bit CAS (implemented by CMPXCHG8B) to do the interlockedincrement64. But I don't want to provide a interlockedincrement64 on 32 bit platfroms by default because it requires cas with a while loop so it actually polls. _______________________________________________ fpc-devel maillist - fpc-devel@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-devel
