Can not set isolated_cpus on Ubuntu 22.04

[Henrrysong]

Hi，I got a problem on Ubuntu 22.04，When I set expert_execution- isolated_cpus and run gnb，the print shows no permis，but I am alread in su mode，pls help me，thanks
--== srsRAN gNB (commit d8bfdc9) ==--

sh: 1: cannot create /sys/fs/cgroup/srs_housekeeping/cpuset.cpus: Permission denied
sh: 1: cannot create /sys/fs/cgroup/srs_isolated/cpuset.cpus: Permission denied
Lower PHY in quad executor mode.
Available radio types: uhd.
[INFO] [UHD] linux; GNU C++ version 11.4.0; Boost_107400; UHD_4.8.0.0-0ubuntu1~jammy1
Making USRP object with args 'serial=000000388,type=b200,num_recv_frames=256,num_send_frames=256'
[INFO] [LOGGING] Fastpath logging disabled at runtime.
[INFO] [B200] Detected Device: B210
[INFO] [B200] Operating over USB 3.
[INFO] [B200] Initialize CODEC control...
[INFO] [B200] Initialize Radio control...
[INFO] [B200] Performing register loopback test...
[INFO] [B200] Register loopback test passed
[INFO] [B200] Performing register loopback test...
[INFO] [B200] Register loopback test passed
[INFO] [B200] Setting master clock rate selection to 'automatic'.
[INFO] [B200] Asking for clock rate 16.000000 MHz...
[INFO] [B200] Actually got clock rate 16.000000 MHz.
[INFO] [MULTI_USRP] Setting master clock rate selection to 'manual'.
[INFO] [B200] Asking for clock rate 46.080000 MHz...
[INFO] [B200] Actually got clock rate 46.080000 MHz.
Cell pci=1, bw=40 MHz, 1T1R, dl_arfcn=627340 (n78), dl_freq=3410.1 MHz, dl_ssb_arfcn=626400, ul_freq=3410.1 MHz

N2: Connection to AMF on 127.0.0.5:38412 completed
==== gNB started ===
Type to view help

gnb configuration：`
cu_cp:
amf:
addr: 127.0.0.5 # The address or hostname of the AMF.
bind_addr: 127.0.0.1 # A local IP that the gNB binds to for traffic from the AMF.
supported_tracking_areas: # Configure the TA associated with the CU-CP
- tac: 7
plmn_list:
- plmn: "46006"
tai_slice_support_list:
- sst: 1

ru_sdr:
device_driver: uhd
device_args: serial=000000388,type=b200,num_recv_frames=256,num_send_frames=256
clock: external
sync: external
#srate: 23.04
srate: 46.08
otw_format: sc12
tx_gain: 80
rx_gain: 40

cell_cfg:
dl_arfcn: 627340
band: 78
channel_bandwidth_MHz: 40
common_scs: 30
nof_antennas_dl: 1
nof_antennas_ul: 1
plmn: "46006" # PLMN broadcasted by the gNB.
tac: 7 # Tracking area code (needs to match the core configuration).
pci: 1
pusch:
min_k2: 2
mcs_table: qam256
pdsch:
mcs_table: qam256
tdd_ul_dl_cfg:
dl_ul_tx_period: 4
nof_dl_slots: 2
nof_dl_symbols: 10
nof_ul_slots: 1
nof_ul_symbols: 0
pucch:
sr_period_ms: 2
min_k1: 2
mac_cell_group:
bsr_cfg:
periodic_bsr_timer: 1

expert_execution:
affinities:
isolated_cpus: 4
threads:
non_rt:
nof_non_rt_threads: 4
non_rt_task_queue_size: 4096
upper_phy:
pdsch_processor_type: auto
pdsch_cb_batch_length: 0
nof_pusch_decoder_threads: 4
nof_ul_threads: 4
nof_dl_threads: 4
lower_phy:
execution_profile: quad

pcap:
mac_enable: false # Set to true to enable MAC-layer PCAPs.
mac_filename: /tmp/gnb_mac.pcap # Path where the MAC PCAP is stored.
ngap_enable: false # Set to true to enable NGAP PCAPs.
ngap_filename: /tmp/gnb_ngap.pcap # Path where the NGAP PCAP is stored.
`

[dvdgrgrtt]

Hi @Henrrysong,
the isolated_cpus option will not be available anymore starting from the next release. I'd avoid using it.