Date: Sun, 09 Aug 2026 17:01:42 +0000 From: Adrian Chadd <adrian@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org Cc: Abdelkader Boudih <freebsd@seuros.com> Subject: git: ad9cc3f1da14 - main - uvideo: limit isochronous transfers to 32 frames Message-ID: <6a78b276.3b404.56e09d56@gitrepo.freebsd.org>
index | next in thread | raw e-mail
The branch main has been updated by adrian: URL: https://cgit.FreeBSD.org/src/commit/?id=ad9cc3f1da14da168e676aeadecd77dfaff6fc06 commit ad9cc3f1da14da168e676aeadecd77dfaff6fc06 Author: Abdelkader Boudih <freebsd@seuros.com> AuthorDate: 2026-08-09 16:58:55 +0000 Commit: Adrian Chadd <adrian@FreeBSD.org> CommitDate: 2026-08-09 16:59:01 +0000 uvideo: limit isochronous transfers to 32 frames Raising UVIDEO_NFRAMES_MAX from 40 to 128 in 3b6f833c95eb improved throughput on xhci but made every camera on an ehci bus fail to stream. Integrated webcams became unusable. Measured on a MacBookPro9,2 with two ehci(4) FaceTime HD cameras and an xhci(4) Logitech C920: 128 32 ehci, 12 captures 0 ok 12 ok xhci 1920x1080 5 fps 5 fps xhci 1280x720 10 fps 10 fps Fixes: 3b6f833c95eb Reviewed by: bapt Differential Revision: https://reviews.freebsd.org/D58501 --- sys/dev/usb/video/uvideo.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/sys/dev/usb/video/uvideo.h b/sys/dev/usb/video/uvideo.h index fbcc0b2ec930..512cf7ac8316 100644 --- a/sys/dev/usb/video/uvideo.h +++ b/sys/dev/usb/video/uvideo.h @@ -640,7 +640,7 @@ struct usb_video_format_desc { /* * Driver specific private definitions. */ -#define UVIDEO_NFRAMES_MAX 128 +#define UVIDEO_NFRAMES_MAX 32 #define UVIDEO_IXFERS 5 struct uvideo_vs_iface {home | help
Want to link to this message? Use this
URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?6a78b276.3b404.56e09d56>