On Wed, Jun 13, 2012 at 11:04 PM, Carlos Padial <palidoestud...@gmail.com> wrote: > hi > > I have been using the camera at diferent sizes and compressions, and trying > to find the limits (and looking at flavios article) i have some doubts... > > when recording to the hdd and streaming at the same time,(with same res as > Flavio, 2064x896 what i call FMAX :) > my limit is 240-250K framesize (at 25fps) > > when recording without streaming i can go up to 340K. > > I mean, when i pass this limmit the buffer overflow and there are (soon or > later) dropped frames. > > just to be sure. My internal hdd has the same transfer speed as an external > sata hdd?
yes > are this values normal? I was able to go a bit higher with SATA recording, if I remember correctly I was able to go beyond 500KB per frame and reached a limit at around 15-16 MB/s = 120 Mbit/s > i collect some data from the hdd: > > hdparm -T -t /dev/hda1 > > /dev/hda1: > Timing buffer-cache reads: 44 MB in 0.51 seconds = 87681 kB/s > Timing buffered disk reads: 43 MB in 3.02 seconds = 14537 kB/s > [root@Elphel353 /root]3433# hdparm /dev/hda1 > > /dev/hda1: > multcount = 0 (off) > IO_support = 0 (default 16-bit) > unmaskirq = 0 (off) > using_dma = 1 (on) > keepsettings = 0 (off) > readonly = 0 (off) > readahead = 256 (on) > geometry = 16383/255/63, sectors = 234441640, start = 8 > > > where can i find more info about the process running inside the camera? > which one are necessary and which not when recording and streaming. In the cameras system settings there is a process tab that gives a bit of insight but there are not too many processes involved actually: str = streamer camogm = hdd recorder all the other threads like 3 php instances, etc should be idling well below 1% CPU usage if they are not used. Please be aware that camogmgui does make a few PHP calls each second to update the information it displays, so to get the absolute peak datarate you would need to issue the camogm recording commands manually over ssh/telnet. Regards Sebastian > > > > best regards > > -- > Carlos Padial > surreal.asturnazari.es > > _______________________________________________ > Support-list mailing list > Support-list@support.elphel.com > http://support.elphel.com/mailman/listinfo/support-list_support.elphel.com > _______________________________________________ Support-list mailing list Support-list@support.elphel.com http://support.elphel.com/mailman/listinfo/support-list_support.elphel.com