Originally posted by brad0
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dav1d 0.7.1 AV1 Decoder Boosts 32-bit Arm Performance By ~28%
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Originally posted by brad0 View PostThe "newest" of CPUs from AMD that would utilize an SSE2 codepath is almost 9 years old. Who the hell is going to have a system that old still running even for testing purposes?
Until less than a month ago, my main home workstation was based on a water-cooled Core2 Dual E8500. No AVX. I had to work at home a lot more recently, and 8G of RAM wasn't enough, so I borrowed a somewhat newer machine. Until the end of last year, my old folks ran a similar system.
My main storage and media (and etc.) server at home runs on a Xeon E3120 (similar to the Core2 E8500). No AVX. Been in service for >11 years, still does its job, is super stable and reliable.
I have another machine, barely 6.5 years old, which got a Pentium G3220. No AVX, no nuthin' (curse you, Intel!).
I got some computers at work with non-AVX CPUs that do a variety of tasks; my main office workstation (besides the newer 2950X-based one, which I mostly `ssh -XY` to) does not have AVX2. There are folks who still use older servers, notebooks (for diagnostics, for students) and even desktops (mostly in task-specific roles) with older CPUs.
So I wouldn't say SSE is dead. Besides, in some cases SSE can have lower latency than AVX.
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Originally posted by brad0 View Postdav1d has a decent amount of SSSE3 codepaths but older AMD processors before Zen did not support SSSE3.
Code:# lscpu Architecture: x86_64 CPU op-mode(s): 32-bit, 64-bit Byte Order: Little Endian Address sizes: 48 bits physical, 48 bits virtual CPU(s): 16 On-line CPU(s) list: 0-15 Thread(s) per core: 2 Core(s) per socket: 8 Socket(s): 1 NUMA node(s): 2 Vendor ID: AuthenticAMD CPU family: 21 Model: 2 Model name: AMD Opteron(tm) Processor 6386 SE Stepping: 0 Frequency boost: enabled CPU MHz: 1398.765 CPU max MHz: 2800.0000 CPU min MHz: 1400.0000 BogoMIPS: 5602.20 Virtualization: AMD-V L1d cache: 128 KiB L1i cache: 512 KiB L2 cache: 16 MiB L3 cache: 12 MiB NUMA node0 CPU(s): 0-7 NUMA node1 CPU(s): 8-15 Vulnerability Itlb multihit: Not affected Vulnerability L1tf: Not affected Vulnerability Mds: Not affected Vulnerability Meltdown: Not affected Vulnerability Spec store bypass: Mitigation; Speculative Store Bypass disabled via prctl and seccomp Vulnerability Spectre v1: Mitigation; usercopy/swapgs barriers and __user pointer sanitization Vulnerability Spectre v2: Mitigation; Full AMD retpoline, IBPB conditional, STIBP disabled, RSB filling Vulnerability Srbds: Not affected Vulnerability Tsx async abort: Not affected Flags: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm constant_tsc rep_good nopl nonstop_tsc cpuid extd_apicid amd_dcm aperfmperf pni pclmulqdq monitor ssse3 fma cx16 sse4_1 sse4_2 popcnt aes xsave avx f16c lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs xop skinit wdt fma4 tce nodeid_msr tbm topoext perfctr_core perfctr_nb cpb hw_pstate ssbd ibpb vmmcall bmi1 arat npt lbrv svm_lock nrip_save tsc_scale vmcb_clean flushbyasid decodeassists pausefilter pfthreshold
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