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no-senders; approved; loop; banned-address; header-match-ffmpeg-devel.ffmpeg.org-0; header-match-ffmpeg-devel.ffmpeg.org-1; header-match-ffmpeg-devel.ffmpeg.org-2; header-match-ffmpeg-devel.ffmpeg.org-3; emergency; member-moderation; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header Content-Type: text/plain; charset="iso-8859-1" X-Content-Filtered-By: Mailman/MimeDel 3.3.10 X-Mailman-Version: 3.3.10 Precedence: list Reply-To: FFmpeg development discussions and patches Subject: [FFmpeg-devel] Suspected memory leak with CUDA detected by valgrind List-Id: FFmpeg development discussions and patches Archived-At: Archived-At: List-Archive: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: From: Marco Oman via ffmpeg-devel Cc: Marco Oman Content-Transfer-Encoding: quoted-printable Archived-At: List-Archive: List-Post: Hi, I compiled the example hw_decode.c on Ubuntu 24.04 with ffmpeg 7.0 compiled= with --enable-cuda-nvcc. Then lauched the decoding over a small mp4 file w= ith a video encoded H264 and checked the whole thing with valgrind with the= following command: valgrind --leak-check=3Dyes --log-file=3Dhw_decode.log ./hw_decode cuda a.m= p4 a.raw The resulting log is quite large, suggesting that there is a memory leak . = Anyone found somehting similar? Is the leak real or valgrind is giving a false positive? Here there are two sections from hw_decode.log =3D=3D1495328=3D=3D 48 bytes in 1 blocks are definitely lost in loss record= 24 of 118 =3D=3D1495328=3D=3D at 0x484DA83: calloc (in /usr/libexec/valgrind/vgpre= load_memcheck-amd64-linux.so) =3D=3D1495328=3D=3D by 0x7029E01: pthread_cond_broadcast@GLIBC_2.2.5 (ol= d_pthread_cond_broadcast.c:33) =3D=3D1495328=3D=3D by 0x22095866: ??? =3D=3D1495328=3D=3D by 0x22064373: ??? =3D=3D1495328=3D=3D by 0x2201800E: ??? =3D=3D1495328=3D=3D by 0x4E3CC65: nvdec_test_capabilities (nvdec.c:127) =3D=3D1495328=3D=3D by 0x4E3CC65: nvdec_decoder_create (nvdec.c:218) =3D=3D1495328=3D=3D by 0x4E3CC65: ff_nvdec_decode_init (nvdec.c:404) =3D=3D1495328=3D=3D by 0x4ADDBA3: hwaccel_init (decode.c:1193) =3D=3D1495328=3D=3D by 0x4ADDBA3: ff_get_format (decode.c:1331) =3D=3D1495328=3D=3D by 0x4BE3B97: get_pixel_format (h264_slice.c:909) =3D=3D1495328=3D=3D by 0x4BE5A87: h264_init_ps (h264_slice.c:1142) =3D=3D1495328=3D=3D by 0x4BE95F7: h264_field_start (h264_slice.c:1393) =3D=3D1495328=3D=3D by 0x4BE95F7: ff_h264_queue_decode_slice (h264_slice= .c:2150) =3D=3D1495328=3D=3D by 0x4BEE8C5: decode_nal_units (h264dec.c:656) =3D=3D1495328=3D=3D by 0x4BEE8C5: h264_decode_frame (h264dec.c:1058) =3D=3D1495328=3D=3D by 0x4ADC4C9: decode_simple_internal (decode.c:409) =3D=3D1495328=3D=3D by 0x4ADC4C9: decode_simple_receive_frame (decode.c:= 579) =3D=3D1495328=3D=3D by 0x4ADC4C9: decode_receive_frame_internal (decode.= c:608) Plus many more of this kind =3D=3D1495328=3D=3D 72 bytes in 1 blocks are possibly lost in loss record 4= 4 of 118 =3D=3D1495328=3D=3D at 0x4848899: malloc (in /usr/libexec/valgrind/vgpre= load_memcheck-amd64-linux.so) =3D=3D1495328=3D=3D by 0xA91E6D9: ??? (in /usr/lib/x86_64-linux-gnu/libc= uda.so.570.133.20) =3D=3D1495328=3D=3D by 0xA80E7A9: ??? (in /usr/lib/x86_64-linux-gnu/libc= uda.so.570.133.20) =3D=3D1495328=3D=3D by 0xA7FF82C: ??? (in /usr/lib/x86_64-linux-gnu/libc= uda.so.570.133.20) =3D=3D1495328=3D=3D by 0xA7CD210: ??? (in /usr/lib/x86_64-linux-gnu/libc= uda.so.570.133.20) =3D=3D1495328=3D=3D by 0xA81B671: ??? (in /usr/lib/x86_64-linux-gnu/libc= uda.so.570.133.20) =3D=3D1495328=3D=3D by 0x5EB4E90: cuda_device_create (hwcontext_cuda.c:4= 46) =3D=3D1495328=3D=3D by 0x5EB177E: av_hwdevice_ctx_create (hwcontext.c:61= 9) =3D=3D1495328=3D=3D by 0x10A5A6: hw_decoder_init (in /home/marco/hw_deco= de) =3D=3D1495328=3D=3D by 0x10AD66: main (in /home/marco/hw_decode) ________________________________________ Informativa sulla privacy e sulla sicurezza Questo messaggio pu=F2 contenere informazioni confidenziali ed =E8 destinat= o esclusivamente all'indirizzo in intestazione. 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