Would be amazing to see these changes ported to Source/Orangebox engines :)
Chris Green escribió: >> The first thing I can think of that you could do is rewrite the time >> > function to cache time and only update it every so often.. I have a > proof of concept here. It reduces > syscall time by 40% for HZ=1000 for gettimeofday/clock_gettime. > > > The left4dead server replaces the gettimeofday calls with use of the hardware > cycle counter (on systems which support it stably) reducing the amount of > time spent making syscalls for time to approximately zero. Also, thread > locals went from pthread functions to compiler thread local support, > lock-free thread operations went to gcc intrinsics, etc. So the linux DS bins > spend a lot less time in the kernel and c library functions than previous > linux server releases. > > We're using gcc 4.3.0 for l4d. > > > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of Gary Stanley > Sent: Saturday, January 24, 2009 5:17 PM > To: Half-Life dedicated Linux server mailing list; Half-Life dedicated Linux > server mailing list > Subject: Re: [hlds_linux] AMD64 binaries > > At 03:32 PM 1/24/2009, Chris Green wrote: > >> Those amd-optimized binaries weren't 64-bit binaries AFAIK (this is >> > >from before I started working on the linux ds), but rather were just > >> binaries produced with gcc tuning settings set to favor the amd64 >> chips. With the orange box (and subsequently with l4d), we changed a >> lot of our compiler settings and versions and a lot of things about >> the way we optimize code had changed, and it was felt that after >> these changes, there weren't significant improvements from having >> separate binaries for intel and amd. >> > > Honestly, from an OS point of view 64bit binaries give you a couple > of registers to use on the stack.. i know you use -fPIC for your > shared libaries, so you lose a register to use on the stack.. older > gcc's suffered, > while newer ones are better at optimizing. What GCC are you using for source? > > > >> In our more recent dedicated server work, we've concentrated on >> optimizations that enhance performance of all platforms, and you can >> see it in the >> left4dead linux ds. This release had a lot of the linux-specific >> code rewritten, switch compiler versions, turned on higher optimization >> levels, >> and had a lot of linux-specific server features added, and is >> definitely the highest performing linux ds we've released for any of our >> games. >> > > The first thing I can think of that you could do is rewrite the time > function to cache time and only update it every so often.. I have a > proof of concept here. It reduces > syscall time by 40% for HZ=1000 for gettimeofday/clock_gettime. > > I'm currently using timer_create() instead of usleep() for an experiment. > > > > > >> -----Original Message----- >> From: [email protected] >> [mailto:[email protected]] On Behalf Of ics >> Sent: Saturday, January 24, 2009 11:47 AM >> To: Half-Life dedicated Linux server mailing list >> Subject: Re: [hlds_linux] AMD64 binaries >> >> Maybe 64bit binary was discontinued because it was harder to keep up >> many branches of the engine. Srcds_i486 runs fine on most machines. >> Thats the main purpose anyway, not "best performance" which some people >> here seem to be looking for. Their agenda may be commercial or out of >> interest but i dont think you will get 64bit binaries unless whole Steam >> goes 64bit among games. It must be discontinued for a reason. >> >> -ics >> >> Walton Hoops kirjoitti: >> >>> I admit I haven't dug into the scripts to see what is actually being run, >>> but whenever I start my server (using Ubuntu x64), I see: >>> >>> Auto detecting CPU >>> Using AMD-Opteron (64 bit) Optimised binary. >>> >>> This sounds to me like there already is a 64-bit binary. Am I mistaken? >>> >>> Walton >>> >>> -------------------------------------------------- >>> From: "Kveri" <[email protected]> >>> Sent: Saturday, January 24, 2009 10:26 AM >>> To: "Half-Life dedicated Linux server mailing list" >>> <[email protected]> >>> Subject: Re: [hlds_linux] AMD64 binaries >>> >>> >>> >>>> I think almost everyone here uses newer processors, so everyone should >>>> be interested :). >>>> >>>> Why not to use all that power the x64 processors offer? >>>> >>>> Kveri >>>> >>>> Joseph Laws wrote: >>>> >>>> >>>>> Yes, I'm very interested in the status of the AMD64 binaries as well. >>>>> >>>>> Gary Stanley wrote: >>>>> >>>>> >>>>> >>>>>> What ever happened to AMD64, valve? >>>>>> >>>>>> The AMD64 binaries allowed hosters to use additional gpr's on the >>>>>> stack.. also there are other benefits, native vsyscalls/vdso, no more >>>>>> memory segmentation, high memory support (no PAE) >>>>>> >>>>>> Can you re-release them? I found the older binaries performed >>>>>> excellently under load. >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> _______________________________________________ >>>>>> To unsubscribe, edit your list preferences, or view the list archives, >>>>>> please visit: >>>>>> http://list.valvesoftware.com/mailman/listinfo/hlds_linux >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> >>>>> _______________________________________________ >>>>> To unsubscribe, edit your list preferences, or view the list archives, >>>>> please visit: >>>>> http://list.valvesoftware.com/mailman/listinfo/hlds_linux >>>>> >>>>> >>>>> >>>>> >>>> _______________________________________________ >>>> To unsubscribe, edit your list preferences, or view the list archives, >>>> please visit: >>>> http://list.valvesoftware.com/mailman/listinfo/hlds_linux >>>> >>>> >>>> >>> _______________________________________________ >>> To unsubscribe, edit your list preferences, or view the list >>> >> archives, please visit: >> >>> http://list.valvesoftware.com/mailman/listinfo/hlds_linux >>> >>> >> _______________________________________________ >> To unsubscribe, edit your list preferences, or view the list >> archives, please visit: >> http://list.valvesoftware.com/mailman/listinfo/hlds_linux >> >> _______________________________________________ >> To unsubscribe, edit your list preferences, or view the list >> archives, please visit: >> http://list.valvesoftware.com/mailman/listinfo/hlds_linux >> > > > _______________________________________________ > To unsubscribe, edit your list preferences, or view the list archives, please > visit: > http://list.valvesoftware.com/mailman/listinfo/hlds_linux > > _______________________________________________ > To unsubscribe, edit your list preferences, or view the list archives, please > visit: > http://list.valvesoftware.com/mailman/listinfo/hlds_linux > > _______________________________________________ To unsubscribe, edit your list preferences, or view the list archives, please visit: http://list.valvesoftware.com/mailman/listinfo/hlds_linux
