NVENC runs on a discrete silicon IP core (SIP) block in the GPU, and not on the GPU's shaders. That SIP block has hard-coded limits (set in firmware) to ensure that these who need more than the artificial limit buy Tesla-grade hardware.
Marketing shills by NVIDIA. You can override this limit by using Keylase's nvidia patcher here: https://github.com/keylase/nvidia-patch On 18 July 2018 at 22:00, Yugandhar Veeramachaneni <[email protected]> wrote: > I'm a little confused here because the GPU resource utilization is well > below the hard limits. > > When I run nvidia-smi, this is what I get - > > yugandharv@eclairs:~$ nvidia-smi > Thu Jul 19 00:29:45 2018 > +----------------------------------------------------------- > ------------------+ > | NVIDIA-SMI 390.67 Driver Version: > 390.67 | > |-------------------------------+----------------------+---- > ------------------+ > | GPU Name Persistence-M| Bus-Id Disp.A | Volatile Uncorr. > ECC | > | Fan Temp Perf Pwr:Usage/Cap| Memory-Usage | GPU-Util Compute > M. | > |===============================+======================+==== > ==================| > | 0 Quadro P4000 Off | 00000000:02:00.0 Off | > N/A | > | 52% 55C P0 38W / 105W | 6646MiB / 8117MiB | 25% > Default | > +-------------------------------+----------------------+---- > ------------------+ > > > +----------------------------------------------------------- > ------------------+ > | Processes: GPU > Memory | > | GPU PID Type Process name > Usage | > |=========================================================== > ==================| > | 0 983 C /home/yugandharv/bin/ffmpeg > 229MiB | > | 0 995 C /home/yugandharv/bin/ffmpeg > 229MiB | > | 0 1010 C /home/yugandharv/bin/ffmpeg > 229MiB | > | 0 1012 C /home/yugandharv/bin/ffmpeg > 215MiB | > | 0 1017 C /home/yugandharv/bin/ffmpeg > 235MiB | > | 0 1986 C /home/yugandharv/bin/ffmpeg > 224MiB | > | 0 8484 C /home/yugandharv/bin/ffmpeg > 229MiB | > | 0 8497 C /home/yugandharv/bin/ffmpeg > 229MiB | > | 0 8538 C /home/yugandharv/bin/ffmpeg > 225MiB | > | 0 11097 C /home/yugandharv/bin/ffmpeg > 193MiB | > | 0 11109 C /home/yugandharv/bin/ffmpeg > 193MiB | > | 0 11121 C /home/yugandharv/bin/ffmpeg > 193MiB | > | 0 11134 C /home/yugandharv/bin/ffmpeg > 229MiB | > | 0 11169 C /home/yugandharv/bin/ffmpeg > 225MiB | > | 0 11175 C /home/yugandharv/bin/ffmpeg > 193MiB | > | 0 11186 C /home/yugandharv/bin/ffmpeg > 229MiB | > | 0 11195 C /home/yugandharv/bin/ffmpeg > 229MiB | > | 0 11207 C /home/yugandharv/bin/ffmpeg > 224MiB | > | 0 11222 C /home/yugandharv/bin/ffmpeg > 229MiB | > | 0 11226 C /home/yugandharv/bin/ffmpeg > 225MiB | > | 0 11231 C /home/yugandharv/bin/ffmpeg > 229MiB | > | 0 11234 C /home/yugandharv/bin/ffmpeg > 225MiB | > | 0 11235 C /home/yugandharv/bin/ffmpeg > 229MiB | > | 0 11237 C /home/yugandharv/bin/ffmpeg > 229MiB | > | 0 11240 C /home/yugandharv/bin/ffmpeg > 229MiB | > | 0 11252 C /home/yugandharv/bin/ffmpeg > 229MiB | > | 0 11300 C /home/yugandharv/bin/ffmpeg > 229MiB | > | 0 13264 C /home/yugandharv/bin/ffmpeg > 193MiB | > | 0 14176 C /home/yugandharv/bin/ffmpeg > 193MiB | > | 0 30258 C /home/yugandharv/bin/ffmpeg > 229MiB | > +----------------------------------------------------------- > ------------------+ > > > Thanks, > > Yugandhar > > On Wed, Jul 18, 2018 at 11:55 AM Dennis Mungai <[email protected]> wrote: > > > You mentioned 30 streams. And more cause this to "fail". > > > > Perhaps the Quadro line has a maximum simultaneous encoder limit of 30, > > similar to the GeForce's limit of 2? > > > > On Wed, Jul 18, 2018, 19:28 Yugandhar Veeramachaneni <[email protected] > > > > wrote: > > > > > Hello everyone, > > > > > > I'm currently using an NVIDIA Quadro P4000 GPU to transcode multicast > UDP > > > streams to RTMP streams. I have quite about 30 streams running in > > parallel > > > on this GPU and I have no problems so far. I tried adding more today > and > > > many of them are failing with this error. > > > > > > [h264_nvenc @ 0x55ef24458040] Loaded Nvenc version 8.1 > > > [h264_nvenc @ 0x55ef24458040] Nvenc initialized successfully > > > [h264_nvenc @ 0x55ef24458040] 1 CUDA capable devices found > > > [h264_nvenc @ 0x55ef24458040] [ GPU #0 - < Quadro P4000 > has Compute > SM > > > 6.1 ] > > > [h264_nvenc @ 0x55ef24458040] Failed creating CUDA context for NVENC: > 0x2 > > > [h264_nvenc @ 0x55ef24458040] No NVENC capable devices found > > > [h264_nvenc @ 0x55ef24458040] Nvenc unloaded > > > > > > Full log is pasted at > > > https://gist.github.com/yugandhar91/47a1c30482d1e89a47f7b6fb6dd420ca > > > > > > Can you please point me to my mistake? > > > > > > Thanks, > > > > > > Yugandhar > > > _______________________________________________ > > > ffmpeg-user mailing list > > > [email protected] > > > http://ffmpeg.org/mailman/listinfo/ffmpeg-user > > > > > > To unsubscribe, visit link above, or email > > > [email protected] with subject "unsubscribe". > > _______________________________________________ > > ffmpeg-user mailing list > > [email protected] > > http://ffmpeg.org/mailman/listinfo/ffmpeg-user > > > > To unsubscribe, visit link above, or email > > [email protected] with subject "unsubscribe". > _______________________________________________ > ffmpeg-user mailing list > [email protected] > http://ffmpeg.org/mailman/listinfo/ffmpeg-user > > To unsubscribe, visit link above, or email > [email protected] with subject "unsubscribe". > _______________________________________________ ffmpeg-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email [email protected] with subject "unsubscribe".
