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powerapi-ng
PermissionError: [Errno 13] Permission denied
Hello,
When I run pyJoules, I have the following error:
PermissionError: [Errno 13] Permission denied: '/sys/class/powercap/intel-rapl/intel-rapl:0/intel-rapl:0:2/energy_uj'
I do not understand what I did to have less permission on these files.
Here, is the output of ls -l:
ls -l /sys/class/powercap/intel-rapl/intel-rapl:0/intel-rapl:0:2
total 0
-r-------- 1 root root 4096 Nov 15 15:19 constraint_0_max_power_uw
-r-------- 1 root root 4096 Nov 15 15:19 constraint_0_name
-rw------- 1 root root 4096 Nov 15 15:19 constraint_0_power_limit_uw
-rw------- 1 root root 4096 Nov 15 15:19 constraint_0_time_window_us
lrwxrwxrwx 1 root root 0 Nov 15 15:19 device -> ../../intel-rapl:0
-rw-r--r-- 1 root root 4096 Nov 15 15:19 enabled
-r-------- 1 root root 4096 Nov 15 11:10 energy_uj
-r-------- 1 root root 4096 Nov 15 15:19 max_energy_range_uj
-r--r--r-- 1 root root 4096 Nov 15 15:14 name
drwxr-xr-x 2 root root 0 Nov 15 15:19 power
lrwxrwxrwx 1 root root 0 Nov 15 15:19 subsystem -> ../../../../../../class/powercap
-rw-r--r-- 1 root root 4096 Nov 15 15:19 uevent
Looks quite normal that the permission is denied, because of -r-------- 1 root root 4096 Nov 15 11:10 energy_uj.
I do not want to set up the proper permissions manually(e.g. with chmod command), do you have any idea if there are any settings or something I can do to have the proper permissions ?
Thank you.
Hello,
I don't know any setting to change these permissions (except chmod). This is weird, you should have read permission for this file...
Have you got the same permission for other domains ? (/sys/class/powercap/intel-rapl/intel-rapl:0, /sys/class/powercap/intel-rapl/intel-rapl:0/intel-rapl:0:0 and /sys/class/powercap/intel-rapl/intel-rapl:0/intel-rapl:0:1)
Did you use other tools than pyJoules to get CPU power consumption recently ? Or did you patch you kernel or using an uncommon version of linux ?
Hello, thank you for your answer.
ll /sys/class/powercap/intel-rapl/intel-rapl:0
total 0
-r-------- 1 root root 4.0K Nov 16 09:07 constraint_0_max_power_uw
-r-------- 1 root root 4.0K Nov 16 09:07 constraint_0_name
-rw------- 1 root root 4.0K Nov 16 09:07 constraint_0_power_limit_uw
-rw------- 1 root root 4.0K Nov 16 09:07 constraint_0_time_window_us
-r-------- 1 root root 4.0K Nov 16 09:07 constraint_1_max_power_uw
-r-------- 1 root root 4.0K Nov 16 09:07 constraint_1_name
-rw------- 1 root root 4.0K Nov 16 09:07 constraint_1_power_limit_uw
-rw------- 1 root root 4.0K Nov 16 09:07 constraint_1_time_window_us
lrwxrwxrwx 1 root root 0 Nov 16 09:07 device -> ../../intel-rapl
-rw-r--r-- 1 root root 4.0K Nov 16 09:07 enabled
-r-------- 1 root root 4.0K Nov 16 09:07 energy_uj
drwxr-xr-x 3 root root 0 Nov 16 09:07 intel-rapl:0:0
drwxr-xr-x 3 root root 0 Nov 16 09:07 intel-rapl:0:1
drwxr-xr-x 3 root root 0 Nov 16 09:07 intel-rapl:0:2
-r-------- 1 root root 4.0K Nov 16 09:07 max_energy_range_uj
-r--r--r-- 1 root root 4.0K Nov 16 09:07 name
drwxr-xr-x 2 root root 0 Nov 16 09:07 power
lrwxrwxrwx 1 root root 0 Nov 16 09:07 subsystem -> ../../../../../class/powercap
-rw-r--r-- 1 root root 4.0K Nov 16 09:07 uevent
ll /sys/class/powercap/intel-rapl/intel-rapl:0/intel-rapl:0:0
total 0
-r-------- 1 root root 4.0K Nov 16 10:10 constraint_0_max_power_uw
-r-------- 1 root root 4.0K Nov 16 10:10 constraint_0_name
-rw------- 1 root root 4.0K Nov 16 10:10 constraint_0_power_limit_uw
-rw------- 1 root root 4.0K Nov 16 10:10 constraint_0_time_window_us
lrwxrwxrwx 1 root root 0 Nov 16 10:10 device -> ../../intel-rapl:0
-rw-r--r-- 1 root root 4.0K Nov 16 10:10 enabled
-r-------- 1 root root 4.0K Nov 16 10:10 energy_uj
-r-------- 1 root root 4.0K Nov 16 10:10 max_energy_range_uj
-r--r--r-- 1 root root 4.0K Nov 16 09:07 name
drwxr-xr-x 2 root root 0 Nov 16 10:10 power
lrwxrwxrwx 1 root root 0 Nov 16 09:07 subsystem -> ../../../../../../class/powercap
-rw-r--r-- 1 root root 4.0K Nov 16 09:07 uevent
ll /sys/class/powercap/intel-rapl/intel-rapl:0/intel-rapl:0:1
total 0
-r-------- 1 root root 4.0K Nov 16 10:11 constraint_0_max_power_uw
-r-------- 1 root root 4.0K Nov 16 10:11 constraint_0_name
-rw------- 1 root root 4.0K Nov 16 10:11 constraint_0_power_limit_uw
-rw------- 1 root root 4.0K Nov 16 10:11 constraint_0_time_window_us
lrwxrwxrwx 1 root root 0 Nov 16 10:11 device -> ../../intel-rapl:0
-rw-r--r-- 1 root root 4.0K Nov 16 10:11 enabled
-r-------- 1 root root 4.0K Nov 16 10:11 energy_uj
-r-------- 1 root root 4.0K Nov 16 10:11 max_energy_range_uj
-r--r--r-- 1 root root 4.0K Nov 16 09:07 name
drwxr-xr-x 2 root root 0 Nov 16 10:11 power
lrwxrwxrwx 1 root root 0 Nov 16 09:07 subsystem -> ../../../../../../class/powercap
-rw-r--r-- 1 root root 4.0K Nov 16 09:07 uevent
I do not know when this happened, but I noticed it last friday. On the same day, I change my RAM to a more powerful one.
But I do not think that changing my RAM would do that, isn't?
What is alarming, is that I did granted the required permission (i.e. chmod 444) on one of them to try, and today (after reboot), the permissions have been reset to the ones that are problematic :disappointed:
Looks like I'll have to write a script to grant me these permissions at each boot.
Thank you very much.
EDIT : this issue seems to be related to a security vulnerability A security patch now restrict reading energy value only for privileged users (root) So don't change permissions of any file it's a security vulnerability
Old Message don't follow theses advice this will make security vulnerability on your system
Thanks for your feedback ! We don't know why this issue appear, we are investigating ...
For the moment, you could change the permission of the following files to be readable by the user that use pyJoules :
-
/sys/class/powercap/intel-rapl:*/energy_uj -
/sys/class/powercap/intel-rapl:*:*/energy_uj
In order to help us to find a better solution, could you give us the result of the following commands :
-
uname -a -
lsmod
Hello,
Thank you for following this up.
uname -a
Linux davidsouest-HP-EliteBook-840-G6 5.4.0-53-generic #59-Ubuntu SMP Wed Oct 21 09:38:44 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
➜ ~ lsmod
Module Size Used by
rfcomm 81920 4
xt_nat 16384 4
veth 28672 0
vxlan 69632 0
ip6_udp_tunnel 16384 1 vxlan
udp_tunnel 16384 1 vxlan
xt_policy 16384 0
xt_mark 16384 0
xt_u32 16384 0
nf_conntrack_netlink 45056 0
nfnetlink 16384 2 nf_conntrack_netlink
xfrm_user 36864 1
xfrm_algo 16384 1 xfrm_user
br_netfilter 28672 0
ccm 20480 3
xt_MASQUERADE 20480 7
xt_CHECKSUM 16384 2
ip6table_mangle 16384 1
ip6table_nat 16384 1
iptable_mangle 16384 1
iptable_nat 16384 2
nf_nat 40960 4 ip6table_nat,xt_nat,iptable_nat,xt_MASQUERADE
ebtable_filter 16384 0
ebtables 36864 1 ebtable_filter
bridge 176128 1 br_netfilter
stp 16384 1 bridge
llc 16384 2 bridge,stp
cmac 16384 2
aufs 262144 0
algif_hash 16384 1
algif_skcipher 16384 1
af_alg 24576 6 algif_hash,algif_skcipher
overlay 114688 0
bnep 24576 2
nls_iso8859_1 16384 1
snd_soc_skl_hda_dsp 24576 5
snd_soc_hdac_hdmi 36864 1 snd_soc_skl_hda_dsp
snd_hda_codec_hdmi 61440 1
snd_hda_codec_realtek 126976 1
snd_hda_codec_generic 81920 1 snd_hda_codec_realtek
snd_soc_dmic 16384 1
snd_sof_pci 20480 0
snd_sof_intel_hda_common 69632 1 snd_sof_pci
snd_soc_hdac_hda 24576 1 snd_sof_intel_hda_common
snd_sof_intel_hda 20480 1 snd_sof_intel_hda_common
snd_sof_intel_byt 20480 1 snd_sof_pci
snd_sof_intel_ipc 20480 1 snd_sof_intel_byt
snd_sof 106496 4 snd_sof_pci,snd_sof_intel_hda_common,snd_sof_intel_byt,snd_sof_intel_ipc
snd_sof_xtensa_dsp 16384 1 snd_sof_pci
snd_hda_ext_core 28672 4 snd_sof_intel_hda_common,snd_soc_hdac_hdmi,snd_soc_hdac_hda,snd_sof_intel_hda
snd_soc_acpi_intel_match 32768 2 snd_sof_pci,snd_sof_intel_hda_common
snd_soc_acpi 16384 2 snd_sof_pci,snd_soc_acpi_intel_match
ledtrig_audio 16384 3 snd_hda_codec_generic,snd_hda_codec_realtek,snd_sof
snd_soc_core 245760 6 snd_sof,snd_sof_intel_hda_common,snd_soc_hdac_hdmi,snd_soc_hdac_hda,snd_soc_dmic,snd_soc_skl_hda_dsp
snd_compress 24576 1 snd_soc_core
ac97_bus 16384 1 snd_soc_core
snd_pcm_dmaengine 16384 1 snd_soc_core
mei_hdcp 24576 0
intel_rapl_msr 20480 0
snd_hda_intel 53248 0
snd_intel_dspcfg 24576 3 snd_hda_intel,snd_sof_pci,snd_sof_intel_hda_common
snd_hda_codec 135168 6 snd_hda_codec_generic,snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec_realtek,snd_soc_hdac_hda,snd_soc_skl_hda_dsp
snd_hda_core 90112 11 snd_hda_codec_generic,snd_hda_codec_hdmi,snd_hda_intel,snd_hda_ext_core,snd_hda_codec,snd_hda_codec_realtek,snd_sof_intel_hda_common,snd_soc_hdac_hdmi,snd_soc_hdac_hda,snd_sof_intel_hda,snd_soc_skl_hda_dsp
x86_pkg_temp_thermal 20480 0
snd_hwdep 20480 1 snd_hda_codec
intel_powerclamp 20480 0
snd_pcm 106496 9 snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec,snd_sof,snd_sof_intel_hda_common,snd_soc_hdac_hdmi,snd_soc_core,snd_hda_core,snd_pcm_dmaengine
coretemp 20480 0
kvm_intel 282624 0
iwlmvm 380928 0
snd_seq_midi 20480 0
snd_seq_midi_event 16384 1 snd_seq_midi
kvm 663552 1 kvm_intel
mac80211 843776 1 iwlmvm
snd_rawmidi 36864 1 snd_seq_midi
rapl 20480 0
libarc4 16384 1 mac80211
snd_seq 69632 2 snd_seq_midi,snd_seq_midi_event
intel_cstate 20480 0
snd_seq_device 16384 3 snd_seq,snd_seq_midi,snd_rawmidi
snd_timer 36864 2 snd_seq,snd_pcm
uvcvideo 98304 0
iwlwifi 331776 1 iwlmvm
videobuf2_vmalloc 20480 1 uvcvideo
snd 90112 24 snd_hda_codec_generic,snd_seq,snd_seq_device,snd_hda_codec_hdmi,snd_hwdep,snd_hda_intel,snd_hda_codec,snd_hda_codec_realtek,snd_timer,snd_compress,snd_soc_core,snd_pcm,snd_soc_skl_hda_dsp,snd_rawmidi
videobuf2_memops 20480 1 videobuf2_vmalloc
videobuf2_v4l2 24576 1 uvcvideo
hid_sensor_als 20480 1
videobuf2_common 49152 2 videobuf2_v4l2,uvcvideo
btusb 57344 0
hid_sensor_trigger 20480 2 hid_sensor_als
hp_wmi 16384 0
btrtl 24576 1 btusb
videodev 225280 3 videobuf2_v4l2,uvcvideo,videobuf2_common
industrialio_triggered_buffer 16384 1 hid_sensor_als
btbcm 16384 1 btusb
cfg80211 704512 3 iwlmvm,iwlwifi,mac80211
soundcore 16384 1 snd
wmi_bmof 16384 0
serio_raw 20480 0
sparse_keymap 16384 1 hp_wmi
intel_wmi_thunderbolt 20480 0
joydev 24576 0
input_leds 16384 0
mc 53248 4 videodev,videobuf2_v4l2,uvcvideo,videobuf2_common
kfifo_buf 16384 1 industrialio_triggered_buffer
btintel 24576 1 btusb
hid_sensor_iio_common 20480 2 hid_sensor_trigger,hid_sensor_als
hid_multitouch 28672 0
bluetooth 548864 31 btrtl,btintel,btbcm,bnep,btusb,rfcomm
industrialio 73728 5 industrialio_triggered_buffer,hid_sensor_trigger,kfifo_buf,hid_sensor_als
ecdh_generic 16384 1 bluetooth
ecc 28672 1 ecdh_generic
processor_thermal_device 24576 0
mei_me 40960 1
cros_ec_ishtp 20480 0
intel_rapl_common 24576 2 intel_rapl_msr,processor_thermal_device
cros_ec 20480 1 cros_ec_ishtp
ucsi_acpi 16384 0
intel_soc_dts_iosf 20480 1 processor_thermal_device
mei 106496 3 mei_hdcp,mei_me
typec_ucsi 40960 1 ucsi_acpi
int3403_thermal 20480 0
intel_pch_thermal 16384 0
typec 45056 1 typec_ucsi
int340x_thermal_zone 16384 2 int3403_thermal,processor_thermal_device
int3400_thermal 20480 0
acpi_thermal_rel 16384 1 int3400_thermal
acpi_pad 184320 0
mac_hid 16384 0
hp_wireless 16384 0
nf_log_ipv6 16384 5
ip6t_REJECT 16384 1
nf_reject_ipv6 20480 1 ip6t_REJECT
xt_hl 16384 22
ip6t_rt 20480 3
nf_log_ipv4 16384 5
nf_log_common 16384 2 nf_log_ipv4,nf_log_ipv6
ipt_REJECT 16384 5
nf_reject_ipv4 16384 1 ipt_REJECT
xt_LOG 20480 10
xt_limit 16384 13
xt_addrtype 16384 6
xt_tcpudp 20480 44
xt_conntrack 16384 21
nf_conntrack 139264 5 xt_conntrack,nf_nat,xt_nat,nf_conntrack_netlink,xt_MASQUERADE
nf_defrag_ipv6 24576 1 nf_conntrack
nf_defrag_ipv4 16384 1 nf_conntrack
libcrc32c 16384 2 nf_conntrack,nf_nat
sch_fq_codel 20480 4
ip6table_filter 16384 1
ip6_tables 32768 55 ip6table_filter,ip6table_nat,ip6table_mangle
parport_pc 40960 0
iptable_filter 16384 1
bpfilter 32768 0
ppdev 24576 0
lp 20480 0
parport 53248 3 parport_pc,lp,ppdev
ip_tables 32768 11 iptable_filter,iptable_nat,iptable_mangle
x_tables 40960 22 ebtables,ip6table_filter,xt_conntrack,iptable_filter,xt_LOG,xt_tcpudp,xt_addrtype,xt_CHECKSUM,xt_nat,ip6t_rt,xt_policy,ip6_tables,xt_u32,ipt_REJECT,ip_tables,xt_limit,xt_hl,ip6table_mangle,xt_MASQUERADE,ip6t_REJECT,iptable_mangle,xt_mark
autofs4 45056 2
dm_crypt 40960 1
usbhid 57344 0
hid_sensor_hub 24576 3 hid_sensor_trigger,hid_sensor_iio_common,hid_sensor_als
intel_ishtp_loader 24576 0
intel_ishtp_hid 24576 0
hid_generic 16384 0
crct10dif_pclmul 16384 1
crc32_pclmul 16384 0
ghash_clmulni_intel 16384 0
i915 1986560 12
aesni_intel 372736 7
crypto_simd 16384 1 aesni_intel
cryptd 24576 4 crypto_simd,ghash_clmulni_intel
glue_helper 16384 1 aesni_intel
i2c_algo_bit 16384 1 i915
drm_kms_helper 184320 1 i915
nvme 49152 3
psmouse 155648 0
syscopyarea 16384 1 drm_kms_helper
i2c_i801 32768 0
sysfillrect 16384 1 drm_kms_helper
e1000e 258048 0
sysimgblt 16384 1 drm_kms_helper
thunderbolt 167936 0
fb_sys_fops 16384 1 drm_kms_helper
nvme_core 102400 5 nvme
drm 491520 5 drm_kms_helper,i915
intel_lpss_pci 20480 0
intel_lpss 16384 1 intel_lpss_pci
idma64 20480 0
i2c_hid 28672 0
virt_dma 20480 1 idma64
intel_ish_ipc 24576 0
intel_ishtp 49152 4 cros_ec_ishtp,intel_ishtp_hid,intel_ish_ipc,intel_ishtp_loader
hid 131072 6 i2c_hid,usbhid,hid_multitouch,hid_sensor_hub,intel_ishtp_hid,hid_generic
wmi 32768 3 hp_wmi,intel_wmi_thunderbolt,wmi_bmof
pinctrl_cannonlake 36864 1
video 49152 1 i915
pinctrl_intel 28672 1 pinctrl_cannonlake
Hi, this issue seems to be related to a security vulnerability A security patch now restrict reading energy value only for privileged users (root) So don't change permissions of any file it's a security vulnerability
Ok thank you very much for the pointer.
I have a question. It might be related, it might not, but I was trying to use PowerAPI lately, and I have the following errors :
I: 20-11-26 09:07:20 perf<all>: monitoring actor started
I: 20-11-26 09:07:20 perf<powerapi-sensor>: monitoring actor started
I: 20-11-26 09:10:10 perf<powerapi-formula>: monitoring actor started
E: 20-11-26 12:16:47 perf<powerapi-formula>: cannot read perf values for group=core pkg=0 cpu=3
E: 20-11-26 12:16:47 perf<powerapi-formula>: failed to populate payload for timestamp=1606393007464
E: 20-11-26 12:16:47 perf<all>: cannot read perf values for group=msr pkg=0 cpu=3
E: 20-11-26 12:16:47 perf<all>: failed to populate payload for timestamp=1606393007464
Do you think that PowerAPI is also suffering from these wrong permissions?