Given that game servers are not memory bound and I believe make little or no use of 64bit calculations the benefit of a 64bit build will be limited to the additional registers available when running native 64bit.
Given this there is no real driving factor for full 64bit support and hence goes a long way to explain the delay. Steve Parker Lewis wrote:
An answer from Valve to Knuts nicely formulated question would've been great. We are running eight gameservers on two boxes, both Opterons/64bit linux. Some months ago, we backuped our servers and downgraded to the 32bit edition of our linux distribution. Maybe it was just our lack of experience, but we got only the half of the gameservers up without lags / cpu overload / load average 5+, so that we decided to make a rollback to get all of our servers back online. For over seven months now (since we have our own boxes), we are waiting for the (full) 64bit support from Valve. If we had known about this situation, we had hired Pentium boxes. But after setting everything up and noticing the lack of VAC2, we had to investigate quite a while to find a forum post in the wild elucidating us that the implicitness of 64bit linux support of a game like Counter-Strike is sadly no implicitness. But as VAC2 seems to be updated like the 64bit binaries of hlds, we are not crying for now. Our only question to Valve (like Knuts) is: Is there any hope for us, the 64bit users?
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