IPTV_TVH_Optimisation

https://github.com/tvheadend/tvheadend/pull/1212/files

src/input/mpegts/iptv/iptv_private.h

#include "udp.h"
#include "tvhpoll.h"

#define IPTV_BUF_SIZE    (300*188)
#define IPTV_PKTS        32
#define IPTV_BUF_SIZE    (9000*188)
#define IPTV_PKTS        128
#define IPTV_PKT_PAYLOAD 1472

###################

src/parsers/parsers.c

typedef struct iptv_input   iptv_input_t;


    goto deliver;
  }

  diff = st->es_type == SCT_DVBSUB ? 8*90000 : 6*90000;
  diff = st->es_type == SCT_DVBSUB ? 32*90000 : 24*90000;
  d = pts_diff(pkt->pkt_pcr, (pkt->pkt_dts + 30000) & PTS_MASK);

  if (d > diff || d == PTS_UNSET) {
  
  
  ##################
  
  https://community.getchannels.com/t/tuning-my-setup-to-remove-stalls-pixelation-tvheadend-uk-freesat-channels-sat-ip/25674  


/etc/sysctl.conf
    # Disable IPv6
    net.ipv6.conf.all.disable_ipv6 = 1

    # Reboot 20 seconds after a kernel panic
    kernel.panic = 20

    # Even out the writes, to prevent periods of heavy IO
    vm.dirty_background_bytes=16777216
    vm.dirty_bytes=33554432

    # We don't want to swap
    vm.swappiness=0

    # Tune the buffers (UDP and TCP) and increase default starting point for a gigabit network
    net.core.rmem_default = 16777216
    net.core.wmem_default = 16777216
    net.core.rmem_max = 33554432
    net.core.wmem_max = 33554432
    net.ipv4.udp_mem = 8388608 12582912 16777216
    net.ipv4.tcp_rmem = 4096 87380 16777216
    net.ipv4.tcp_wmem = 4096 87380 16777216
    net.ipv4.udp_rmem_min = 32768
    net.ipv4.udp_wmem_min = 32768
    net.ipv4.tcp_fastopen = 3
    net.ipv4.tcp_slow_start_after_idle = 0

    # Not strictly necessary, but is part of my 'default' config tuning, assymetric routing is not a problem in this environment
    net.ipv4.conf.default.rp_filter = 1
    net.ipv4.conf.all.rp_filter = 1

    # <3 TCP BBR / FQ, this is another topic entirely
    net.ipv4.tcp_congestion_control=bbr
    net.core.default_qdisc=fq

    # Increase the backlog, max conns, file inotify limit these perhaps ARE overly aggressive for the environment but provides no detremental impact for me
    net.core.netdev_max_backlog = 2500
    net.core.somaxconn = 65000
    fs.inotify.max_user_watches=524288