Begin forwarded message: Date: Tue, 21 Aug 2018 18:37:01 +0000 From: bugzilla-dae...@bugzilla.kernel.org To: step...@networkplumber.org Subject: [Bug 200879] New: Poor network performance using CX-5 Mellanox card https://bugzilla.kernel.org/show_bug.cgi?id=200879 Bug ID: 200879 Summary: Poor network performance using CX-5 Mellanox card Product: Networking Version: 2.5 Kernel Version: 4.18 Hardware: Intel OS: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: IPV4 Assignee: step...@networkplumber.org Reporter: ko...@netapp.com Regression: No I'm having issues with the latest kernel (4.18) and using Mellanox CX-5 cards. Tested using a direct connection between the machines and via a 40G link. There is an asymmetric throughput. I have tested some kernels in between 4.15-rc4 and 4.18. What I notice is that I have asymmetric flow performance where "good" direction gets 20+G and the bad direction gets 2+G. I measure performance over doing multiple runs (10). I have noticed that while 4.15-rc4 was not perfect at getting symmetric 20+G performance all the time (details below), the poor performance is more prevalent starting from 4.16 kernel. In 4.15-rc4 6 out of 10 runs show good performance 20+G (in the bad direction). performance in other direction is mostly 28+G (7 out of 10 runs. where 3 runs it goes down to 15+G) In 4.16 3 out of 10 runs show good performance 20+G. performance in other direction is mostly 20+G (7 out of 10 runs where 3 runs goes down to 15G) In 4.17 0 out of 10 runs show good performance. performance in other direction is mostly 20+G (7 out of 10 runs where 3 runs it goes down to 5G) In 4.18 0 out of 10 runs show good performance in the "bad direction". the "good direction" is now also pretty bad where 7 out of 10 runs had throughput between 7-10G and 3 runs had 11-17G. Let me try to do with a description of the setup. I have 2machines: sti-rx200-231 and sti-rx200-232. I have been running iperf3 testing bandwidth where at first the server was on -231 and then when the server was on -232. The "bad" direction is when -232 is the server and -231 is the client. > can you share some configuration details: > CPU numa and affinity details: [kolga@sti-rx200-232 ~]$ numactl -H available: 2 nodes (0-1) node 0 cpus: 0 1 2 3 4 5 12 13 14 15 16 17 node 0 size: 32155 MB node 0 free: 30394 MB node 1 cpus: 6 7 8 9 10 11 18 19 20 21 22 23 node 1 size: 32231 MB node 1 free: 30486 MB node distances: node 0 1 0: 10 20 1: 20 10 [kolga@sti-rx200-231 ~]$ numactl -H available: 2 nodes (0-1) node 0 cpus: 0 1 2 3 4 5 12 13 14 15 16 17 node 0 size: 32161 MB node 0 free: 31100 MB node 1 cpus: 6 7 8 9 10 11 18 19 20 21 22 23 node 1 size: 32231 MB node 1 free: 29774 MB node distances: node 0 1 0: 10 20 1: 20 10 > ethtool -l [kolga@sti-rx200-231 ~]$ sudo ethtool -l enp4s0 Channel parameters for enp4s0: Pre-set maximums: RX: 0 TX: 0 Other: 0 Combined: 24 Current hardware settings: RX: 0 TX: 0 Other: 0 Combined: 24 (same for the other machine) > ethtool -g [kolga@sti-rx200-231 ~]$ sudo ethtool -g enp4s0 Ring parameters for enp4s0: Pre-set maximums: RX: 8192 RX Mini: 0 RX Jumbo: 0 TX: 8192 Current hardware settings: RX: 1024 RX Mini: 0 RX Jumbo: 0 TX: 1024 (same for the other machine) > ethtool -x [kolga@sti-rx200-231 ~]$ sudo ethtool -x enp4s0 RX flow hash indirection table for enp4s0 with 24 RX ring(s): 0: 0 1 2 3 4 5 6 7 8: 8 9 10 11 12 13 14 15 16: 16 17 18 19 20 21 22 23 24: 0 1 2 3 4 5 6 7 32: 8 9 10 11 12 13 14 15 40: 16 17 18 19 20 21 22 23 48: 0 1 2 3 4 5 6 7 56: 8 9 10 11 12 13 14 15 64: 16 17 18 19 20 21 22 23 72: 0 1 2 3 4 5 6 7 80: 8 9 10 11 12 13 14 15 88: 16 17 18 19 20 21 22 23 96: 0 1 2 3 4 5 6 7 104: 8 9 10 11 12 13 14 15 112: 16 17 18 19 20 21 22 23 120: 0 1 2 3 4 5 6 7 RSS hash key: 5e:1c:93:e2:ec:b6:44:b1:e4:ec:b1:20:57:ab:90:f6:0c:1a:46:13:b8:19:66:c8:56:0c:06:b2:d5:53:a6:4d:89:6b:0b:b1:d4:30:90:31 (same for the other machine but the RSS hash key is different) > ethtool -k [kolga@sti-rx200-231 ~]$ sudo ethtool -k enp4s0 Features for enp4s0: Cannot get device udp-fragmentation-offload settings: Operation not supported rx-checksumming: on tx-checksumming: on tx-checksum-ipv4: on tx-checksum-ip-generic: off [fixed] tx-checksum-ipv6: on tx-checksum-fcoe-crc: off [fixed] tx-checksum-sctp: off [fixed] scatter-gather: on tx-scatter-gather: on tx-scatter-gather-fraglist: off [fixed] tcp-segmentation-offload: on tx-tcp-segmentation: on tx-tcp-ecn-segmentation: off [fixed] tx-tcp-mangleid-segmentation: off tx-tcp6-segmentation: on udp-fragmentation-offload: off generic-segmentation-offload: on generic-receive-offload: on large-receive-offload: off rx-vlan-offload: on tx-vlan-offload: on ntuple-filters: off receive-hashing: on highdma: on [fixed] rx-vlan-filter: on vlan-challenged: off [fixed] tx-lockless: off [fixed] netns-local: off [fixed] tx-gso-robust: off [fixed] tx-fcoe-segmentation: off [fixed] tx-gre-segmentation: on tx-gre-csum-segmentation: on tx-ipxip4-segmentation: off [fixed] tx-ipxip6-segmentation: off [fixed] tx-udp_tnl-segmentation: on tx-udp_tnl-csum-segmentation: on tx-gso-partial: on tx-sctp-segmentation: off [fixed] tx-esp-segmentation: off [fixed] tx-udp-segmentation: off [fixed] fcoe-mtu: off [fixed] tx-nocache-copy: off loopback: off [fixed] rx-fcs: off rx-all: off tx-vlan-stag-hw-insert: on rx-vlan-stag-hw-parse: off [fixed] rx-vlan-stag-filter: on [fixed] l2-fwd-offload: off [fixed] hw-tc-offload: off esp-hw-offload: off [fixed] esp-tx-csum-hw-offload: off [fixed] rx-udp_tunnel-port-offload: on tls-hw-tx-offload: off [fixed] rx-gro-hw: off [fixed] tls-hw-record: off [fixed] (i think it's the same for the other machine but just in case here's the output) [kolga@sti-rx200-232 ~]$ sudo ethtool -k enp4s0 Features for enp4s0: Cannot get device udp-fragmentation-offload settings: Operation not supported rx-checksumming: on tx-checksumming: on tx-checksum-ipv4: on tx-checksum-ip-generic: off [fixed] tx-checksum-ipv6: on tx-checksum-fcoe-crc: off [fixed] tx-checksum-sctp: off [fixed] scatter-gather: on tx-scatter-gather: on tx-scatter-gather-fraglist: off [fixed] tcp-segmentation-offload: on tx-tcp-segmentation: on tx-tcp-ecn-segmentation: off [fixed] tx-tcp-mangleid-segmentation: off tx-tcp6-segmentation: on udp-fragmentation-offload: off generic-segmentation-offload: on generic-receive-offload: on large-receive-offload: off rx-vlan-offload: on tx-vlan-offload: on ntuple-filters: off receive-hashing: on highdma: on [fixed] rx-vlan-filter: on vlan-challenged: off [fixed] tx-lockless: off [fixed] netns-local: off [fixed] tx-gso-robust: off [fixed] tx-fcoe-segmentation: off [fixed] tx-gre-segmentation: on tx-gre-csum-segmentation: on tx-ipxip4-segmentation: off [fixed] tx-ipxip6-segmentation: off [fixed] tx-udp_tnl-segmentation: on tx-udp_tnl-csum-segmentation: on tx-gso-partial: on tx-sctp-segmentation: off [fixed] tx-esp-segmentation: off [fixed] tx-udp-segmentation: off [fixed] fcoe-mtu: off [fixed] tx-nocache-copy: off loopback: off [fixed] rx-fcs: off rx-all: off tx-vlan-stag-hw-insert: on rx-vlan-stag-hw-parse: off [fixed] rx-vlan-stag-filter: on [fixed] l2-fwd-offload: off [fixed] hw-tc-offload: off esp-hw-offload: off [fixed] esp-tx-csum-hw-offload: off [fixed] rx-udp_tunnel-port-offload: on tls-hw-tx-offload: off [fixed] rx-gro-hw: off [fixed] tls-hw-record: off [fixed] > ethtool --show-priv-flags [kolga@sti-rx200-231 ~]$ sudo ethtool --show-priv-flags enp4s0 Private flags for enp4s0: rx_cqe_moder : on tx_cqe_moder : off rx_cqe_compress: off rx_striding_rq : on (same for the other machine) > ethool -S //before and after the good and bad runs" > perf report/top while running the test. This is a run where -232 is a server and -231 is a client. [kolga@sti-rx200-232 src]$ ./iperf3 -s ----------------------------------------------------------- Server listening on 5201 ----------------------------------------------------------- Accepted connection from 172.20.35.189, port 37302 [ 5] local 172.20.35.191 port 5201 connected to 172.20.35.189 port 37304 [ ID] Interval Transfer Bitrate [ 5] 0.00-1.00 sec 236 MBytes 1.98 Gbits/sec [ 5] 1.00-2.00 sec 233 MBytes 1.95 Gbits/sec [ 5] 2.00-3.00 sec 235 MBytes 1.97 Gbits/sec [ 5] 3.00-4.00 sec 231 MBytes 1.94 Gbits/sec [ 5] 4.00-5.00 sec 243 MBytes 2.04 Gbits/sec [ 5] 5.00-6.00 sec 238 MBytes 1.99 Gbits/sec [ 5] 6.00-7.00 sec 230 MBytes 1.93 Gbits/sec [ 5] 7.00-8.00 sec 232 MBytes 1.94 Gbits/sec [ 5] 8.00-9.00 sec 272 MBytes 2.28 Gbits/sec [ 5] 9.00-10.00 sec 249 MBytes 2.09 Gbits/sec [ 5] 10.00-10.05 sec 10.4 MBytes 1.90 Gbits/sec - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bitrate [ 5] 0.00-10.05 sec 2.35 GBytes 2.01 Gbits/sec receiver [kolga@sti-rx200-231 src]$ sudo ./iperf3 -c 172.20.35.191 Connecting to host 172.20.35.191, port 5201 [ 5] local 172.20.35.189 port 37304 connected to 172.20.35.191 port 5201 [ ID] Interval Transfer Bitrate Retr Cwnd [ 5] 0.00-1.00 sec 249 MBytes 2.09 Gbits/sec 4 1.93 MBytes [ 5] 1.00-2.00 sec 232 MBytes 1.95 Gbits/sec 1 1.69 MBytes [ 5] 2.00-3.00 sec 234 MBytes 1.96 Gbits/sec 0 2.24 MBytes [ 5] 3.00-4.00 sec 232 MBytes 1.95 Gbits/sec 0 2.66 MBytes [ 5] 4.00-5.00 sec 242 MBytes 2.03 Gbits/sec 18 1.32 MBytes [ 5] 5.00-6.00 sec 238 MBytes 1.99 Gbits/sec 1 1.63 MBytes [ 5] 6.00-7.00 sec 230 MBytes 1.93 Gbits/sec 0 2.18 MBytes [ 5] 7.00-8.00 sec 232 MBytes 1.95 Gbits/sec 8 1.38 MBytes [ 5] 8.00-9.00 sec 272 MBytes 2.29 Gbits/sec 2 1.45 MBytes [ 5] 9.00-10.00 sec 248 MBytes 2.08 Gbits/sec 2 1.66 MBytes - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bitrate Retr [ 5] 0.00-10.00 sec 2.35 GBytes 2.02 Gbits/sec 36 sender [ 5] 0.00-10.05 sec 2.35 GBytes 2.01 Gbits/sec receiver iperf Done. Top output from -231 Tasks: 412 total, 1 running, 209 sleeping, 0 stopped, 0 zombie %Cpu(s): 0.0 us, 0.3 sy, 0.0 ni, 99.2 id, 0.0 wa, 0.0 hi, 0.4 si, 0.0 st KiB Mem : 65938632 total, 63195184 free, 2191948 used, 551500 buff/cache KiB Swap: 33030140 total, 33030140 free, 0 used. 63105388 avail Mem PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 162 root 20 0 0 0 0 I 3.3 0.0 0:00.51 kworker/12+ 2530 root 20 0 0 0 0 I 1.7 0.0 0:00.39 kworker/u4+ 2742 root 20 0 0 0 0 I 1.3 0.0 0:00.17 kworker/u4+ 2394 root 20 0 0 0 0 I 1.0 0.0 0:00.16 kworker/17+ 2774 kolga 20 0 158000 4640 3676 R 0.3 0.0 0:00.03 top 1 root 20 0 191980 6436 3900 S 0.0 0.0 0:26.21 systemd 2 root 20 0 0 0 0 S 0.0 0.0 0:00.01 kthreadd 3 root 0 -20 0 0 0 I 0.0 0.0 0:00.00 rcu_gp 4 root 0 -20 0 0 0 I 0.0 0.0 0:00.00 rcu_par_gp 5 root 20 0 0 0 0 I 0.0 0.0 0:00.02 kworker/0:+ 6 root 0 -20 0 0 0 I 0.0 0.0 0:00.00 kworker/0:+ 8 root 20 0 0 0 0 I 0.0 0.0 0:00.00 kworker/u4+ 9 root 0 -20 0 0 0 I 0.0 0.0 0:00.00 mm_percpu_+ 10 root 20 0 0 0 0 S 0.0 0.0 0:00.00 ksoftirqd/0 11 root 20 0 0 0 0 I 0.0 0.0 0:00.17 rcu_sched 12 root 20 0 0 0 0 I 0.0 0.0 0:00.00 rcu_bh 13 root rt 0 0 0 0 S 0.0 0.0 0:00.06 migration/0 Output from -232 Tasks: 400 total, 2 running, 202 sleeping, 0 stopped, 0 zombie %Cpu(s): 0.1 us, 1.5 sy, 0.0 ni, 97.3 id, 0.0 wa, 0.0 hi, 1.0 si, 0.0 st KiB Mem : 65932576 total, 63205228 free, 2180492 used, 546856 buff/cache KiB Swap: 28901372 total, 28901372 free, 0 used. 63114220 avail Mem PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 2467 kolga 20 0 43716 4144 3608 R 37.9 0.0 0:03.32 lt-iperf3 1199 root 20 0 0 0 0 D 2.7 0.0 0:00.18 kworker/23+ 565 root 20 0 0 0 0 I 1.7 0.0 0:00.23 kworker/2:+ 2360 root 20 0 0 0 0 I 1.3 0.0 0:00.16 kworker/u4+ 153 root 20 0 0 0 0 I 0.7 0.0 0:00.11 kworker/23+ 2273 root 20 0 0 0 0 I 0.7 0.0 0:01.13 kworker/u4+ 691 root 20 0 0 0 0 S 0.3 0.0 0:00.20 xfsaild/dm+ 2448 root 20 0 0 0 0 I 0.3 0.0 0:00.08 kworker/u4+ 1 root 20 0 191820 6108 3804 S 0.0 0.0 0:26.12 systemd 2 root 20 0 0 0 0 S 0.0 0.0 0:00.01 kthreadd 3 root 0 -20 0 0 0 I 0.0 0.0 0:00.00 rcu_gp 4 root 0 -20 0 0 0 I 0.0 0.0 0:00.00 rcu_par_gp 6 root 0 -20 0 0 0 I 0.0 0.0 0:00.00 kworker/0:+ 9 root 0 -20 0 0 0 I 0.0 0.0 0:00.00 mm_percpu_+ 10 root 20 0 0 0 0 S 0.0 0.0 0:00.00 ksoftirqd/0 11 root 20 0 0 0 0 I 0.0 0.0 0:00.13 rcu_sched 12 root 20 0 0 0 0 I 0.0 0.0 0:00.00 rcu_bh Here's a run where -231 is the server and -232 is the client. A "good" direction [kolga@sti-rx200-231 src]$ ./iperf3 -s ----------------------------------------------------------- Server listening on 5201 ----------------------------------------------------------- Accepted connection from 172.20.35.191, port 35060 [ 5] local 172.20.35.189 port 5201 connected to 172.20.35.191 port 35062 [ ID] Interval Transfer Bitrate [ 5] 0.00-1.00 sec 1.81 GBytes 15.5 Gbits/sec [ 5] 1.00-2.00 sec 1.90 GBytes 16.3 Gbits/sec [ 5] 2.00-3.00 sec 1.25 GBytes 10.8 Gbits/sec [ 5] 3.00-4.00 sec 826 MBytes 6.93 Gbits/sec [ 5] 4.00-5.00 sec 819 MBytes 6.87 Gbits/sec [ 5] 5.00-6.00 sec 1.47 GBytes 12.6 Gbits/sec [ 5] 6.00-7.00 sec 1.79 GBytes 15.4 Gbits/sec [ 5] 7.00-8.00 sec 1.14 GBytes 9.75 Gbits/sec [ 5] 8.00-9.00 sec 1.81 GBytes 15.6 Gbits/sec [ 5] 9.00-10.00 sec 1.77 GBytes 15.2 Gbits/sec [ 5] 10.00-10.04 sec 78.2 MBytes 16.3 Gbits/sec - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bitrate [ 5] 0.00-10.04 sec 14.6 GBytes 12.5 Gbits/sec receiver ----------------------------------------------------------- Server listening on 5201 ----------------------------------------------------------- ./iperf3 -c 172.20.35.189 Connecting to host 172.20.35.189, port 5201 [ 5] local 172.20.35.191 port 35062 connected to 172.20.35.189 port 5201 [ ID] Interval Transfer Bitrate Retr Cwnd [ 5] 0.00-1.00 sec 1.89 GBytes 16.2 Gbits/sec 100 1.45 MBytes [ 5] 1.00-2.00 sec 1.90 GBytes 16.4 Gbits/sec 86 638 KBytes [ 5] 2.00-3.00 sec 1.21 GBytes 10.4 Gbits/sec 57 1.15 MBytes [ 5] 3.00-4.00 sec 830 MBytes 6.96 Gbits/sec 7 1.54 MBytes [ 5] 4.00-5.00 sec 815 MBytes 6.84 Gbits/sec 15 1.10 MBytes [ 5] 5.00-6.00 sec 1.51 GBytes 12.9 Gbits/sec 362 690 KBytes [ 5] 6.00-7.00 sec 1.72 GBytes 14.8 Gbits/sec 665 690 KBytes [ 5] 7.00-8.00 sec 1.20 GBytes 10.4 Gbits/sec 639 778 KBytes [ 5] 8.00-9.00 sec 1.81 GBytes 15.6 Gbits/sec 879 708 KBytes [ 5] 9.00-10.00 sec 1.77 GBytes 15.2 Gbits/sec 865 577 KBytes - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bitrate Retr [ 5] 0.00-10.00 sec 14.6 GBytes 12.6 Gbits/sec 3675 sender [ 5] 0.00-10.04 sec 14.6 GBytes 12.5 Gbits/sec receiver iperf Done. -232 top Tasks: 391 total, 1 running, 202 sleeping, 0 stopped, 0 zombie %Cpu(s): 0.0 us, 1.4 sy, 0.0 ni, 97.2 id, 0.0 wa, 0.0 hi, 1.4 si, 0.0 st KiB Mem : 65932576 total, 63203164 free, 2181920 used, 547492 buff/cache KiB Swap: 28901372 total, 28901372 free, 0 used. 63111764 avail Mem PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 2637 kolga 20 0 43716 4476 3944 S 23.6 0.0 0:02.09 lt-iperf3 2510 root 20 0 0 0 0 I 4.3 0.0 0:00.46 kworker/10+ 2653 root 20 0 0 0 0 I 3.0 0.0 0:00.16 kworker/1:+ 2630 root 20 0 0 0 0 I 1.7 0.0 0:00.14 kworker/u4+ 565 root 20 0 0 0 0 I 1.0 0.0 0:00.32 kworker/2:+ 2609 root 20 0 0 0 0 I 1.0 0.0 0:00.48 kworker/u4+ 2273 root 20 0 0 0 0 I 0.7 0.0 0:01.67 kworker/u4+ 25 root 20 0 0 0 0 S 0.3 0.0 0:00.01 ksoftirqd/2 74 root 20 0 0 0 0 S 0.3 0.0 0:00.03 ksoftirqd/+ 2651 kolga 20 0 158000 4568 3640 R 0.3 0.0 0:00.03 top 1 root 20 0 191820 6108 3804 S 0.0 0.0 0:26.12 systemd 2 root 20 0 0 0 0 S 0.0 0.0 0:00.01 kthreadd 3 root 0 -20 0 0 0 I 0.0 0.0 0:00.00 rcu_gp 4 root 0 -20 0 0 0 I 0.0 0.0 0:00.00 rcu_par_gp 6 root 0 -20 0 0 0 I 0.0 0.0 0:00.00 kworker/0:+ 9 root 0 -20 0 0 0 I 0.0 0.0 0:00.00 mm_percpu_+ 10 root 20 0 0 0 0 S 0.0 0.0 0:00.00 ksoftirqd/0 -231 top Tasks: 413 total, 3 running, 209 sleeping, 0 stopped, 0 zombie %Cpu(s): 0.1 us, 3.1 sy, 0.0 ni, 94.7 id, 0.0 wa, 0.0 hi, 2.1 si, 0.0 st KiB Mem : 65938632 total, 63202896 free, 2183572 used, 552164 buff/cache KiB Swap: 33030140 total, 33030140 free, 0 used. 63113436 avail Mem PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 2859 kolga 20 0 43716 4108 3572 R 70.8 0.0 0:05.75 lt-iperf3 2875 root 20 0 0 0 0 I 7.3 0.0 0:00.36 kworker/9:+ 185 root 20 0 0 0 0 I 6.6 0.0 0:00.47 kworker/9:+ 68 root 20 0 0 0 0 S 5.0 0.0 0:00.25 ksoftirqd/9 2421 root 20 0 0 0 0 I 3.0 0.0 0:00.10 kworker/13+ 2832 root 20 0 0 0 0 I 1.7 0.0 0:00.28 kworker/u4+ 2742 root 20 0 0 0 0 I 1.0 0.0 0:00.63 kworker/u4+ 2530 root 20 0 0 0 0 I 0.7 0.0 0:01.41 kworker/u4+ 2877 kolga 20 0 158000 4712 3740 R 0.3 0.0 0:00.02 top 1 root 20 0 191980 6440 3900 S 0.0 0.0 0:26.23 systemd 2 root 20 0 0 0 0 S 0.0 0.0 0:00.01 kthreadd 3 root 0 -20 0 0 0 I 0.0 0.0 0:00.00 rcu_gp 4 root 0 -20 0 0 0 I 0.0 0.0 0:00.00 rcu_par_gp 5 root 20 0 0 0 0 I 0.0 0.0 0:00.02 kworker/0:+ 6 root 0 -20 0 0 0 I 0.0 0.0 0:00.00 kworker/0:+ 8 root 20 0 0 0 0 I 0.0 0.0 0:00.00 kworker/u4+ 9 root 0 -20 0 0 0 I 0.0 0.0 0:00.00 mm_percpu_+ I could attach outputs from ethtool -S (too long to include) From google about CPU states and disabling them [kolga@sti-rx200-232 ~]$ sudo cat /sys/module/intel_idle/parameters/max_cstate 9 adding processor.max_cstate=0 and intel_idle.max_cstate=0 to the kernel boot parameters made is so max_cstate stated at 0. I re-did the re-experiments and it made no difference. -- You are receiving this mail because: You are the assignee for the bug.
