Kernels can affect performance in other ways, i personally use a vanilla
2.6.39 kernel with high resolution timers and get great performance out
of it.
On 07/15/2011 11:40 PM, William Balkcom wrote:
With that being said would having a custom kernel no longer be required to
achieve the best performance?
William Balkcom
On Jul 16, 2011, at 2:29 AM, Nephyrin Zey<[email protected]> wrote:
A 'frame' in the orangebox engine does this, server side:
while (sleep(1ms)) { while (ShouldRunATick()) { RunATick() } }
You can refer to the disassembly or even the old HL2 leak if you don't believe
me. Everyone who claims otherwise is just wrong.
So the only advantage FPS gives is how often the idle engine wakes up to check
for the next tick. It's worth noting that sleep(1ms) could sleep 1ms, 5ms, or
even 15ms depending on the OS, kernel timer method, whether high resolution
sleeps are supported, etc..
So a higher FPS can give greater accuracy in tick *timing*, as each tick would
be starting closer to its ideal (at 66tick, a tick would happen exactly every
15ms). If your FPS is 100, this means wakeups can happen +/- 10ms, which could
be almost an entire tick late. You'd still get roughly 66tick, but with lower
tick accuracy, some might argue you get worse hit registration as you're less
in sync with clients. However, most people play at pings of 50ms or higher. Is
9ms really that significant?
You can pull up net_graph 4 and watch the 'var: ' value, which I'm pretty sure
is the variation in wakeup times in milliseconds, hence the max lag in
milliseconds that could be alleviated by higher FPS.
TL;DR: If you're getting solid 66 updates/second and your var is under 10, nobody with
less than 60ms ping should be complaining about "hit registration".
- Neph
On 07/15/2011 11:04 PM, William Balkcom wrote:
With valve now limiting FPS in orangebox to 500FPS, is it recommended just to
run the server at the default now? Does this same concept apply for the HL1
engine and non orangebox games? Are you truly gaining anything by running at
500FPS?
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