in my opinion first of all the server must be dedicated(not VPS)
1. compile your own kernel with 1000HZ tic timer, tickless system, high resolution timer support etc. google for faqs
2. run you server with settings sys_ticrate 1000 fps_max 1000 -pingboost 1-2-3(one if this)
3.make your HLDS real time priority (chrt -p 99 PID)
profit
my server stats now 32 slots 0 players online
Code:
18:24:24 CPU In Out Uptime Users FPS Players
5.25 0.00 0.00 12 3 959.02 0
18:24:26 stats
18:24:26 CPU In Out Uptime Users FPS Players
5.00 0.00 0.00 12 3 957.95 0
20:43:09 stats
20:43:09 CPU In Out Uptime Users FPS Players
5.25 0.00 0.00 151 6 897.31 0
20:43:09 stats
20:43:09 CPU In Out Uptime Users FPS Players
5.40 0.00 0.00 151 6 945.13 0
20:43:10 stats
20:43:10 CPU In Out Uptime Users FPS Players
5.40 0.00 0.00 151 6 941.51 0
20:43:10 stats
20:43:10 CPU In Out Uptime Users FPS Players
5.00 0.00 0.00 151 6 943.20 0
20:43:10 stats
20:43:10 CPU In Out Uptime Users FPS Players
5.00 0.00 0.00 151 6 946.08 0
20:43:10 stats
20:43:10 CPU In Out Uptime Users FPS Players
5.00 0.00 0.00 151 6 944.56 0
20:43:11 stats
20:43:11 CPU In Out Uptime Users FPS Players
5.50 0.00 0.00 151 6 918.50 0
20:43:11 stats
20:43:11 CPU In Out Uptime Users FPS Players
5.50 0.00 0.00 151 6 943.59 0
20:43:11 stats
20:43:11 CPU In Out Uptime Users FPS Players
5.50 0.00 0.00 151 6 861.76 0