Bug 202311
| Summary: | mei_me intermittently over 2,000 ms on resume from suspend | ||
|---|---|---|---|
| Product: | Drivers | Reporter: | Len Brown (lenb) |
| Component: | Other | Assignee: | Tomas Winkler (tomasw) |
| Status: | ASSIGNED --- | ||
| Severity: | normal | CC: | alexander.usyskin, lenb, todd.e.brandt, tomas.winkler |
| Priority: | P1 | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Kernel Version: | 4.20 | Subsystem: | |
| Regression: | No | Bisected commit-id: | |
| Bug Depends on: | |||
| Bug Blocks: | 178231 | ||
| Attachments: |
Example of mei_me slowness from CFL-H machine in S3 resume
sleepgraph timeline with callgraph over mei_me expanded callgraph showing mei_reset issue.def |
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Created attachment 280545 [details]
sleepgraph timeline with callgraph over mei_me
sleepgraph timeline with callgraph enabled, only mei_me callgraphs are shown.
The issue is occurring in the mei_reset (see callgraph timeline): mei_me_hw_start [mei_me] (2005.518 ms @ 7098.274) it's waiting for a schedule call. Can you please provide BIOS and CSE FW version (cat /sys/class/mei/mei0/fw_ver) Thanks Created attachment 280571 [details] expanded callgraph showing mei_reset If you expand the callgraph in comment #1 this is that you see. $ cat /sys/class/mei/mei0/fw_ver 0:12.0.22.1310 0:12.0.22.1310 0:12.0.22.1310 As for BIOS version, from the timeline's dmesg header: # sysinfo | man:Intel Corporation | plat:CoffeeLake H DDR4 RVP | cpu:Genuine Intel(R) CPU 0000 @ 2.10GHz | bios:CNLSFWR1.R00.X181.B00.1812130202 | numcpu:16 | memsz:8053184 | memfr:3353116 Can you try to disable the TPM via BIOS, if this helps? Created attachment 282531 [details]
issue.def
I just verified that the TPM Security BIOS switch has been disabled from the beginning. i.e. this one (looks like the picture but not greyed out): https://kbimg.dell.com/library/KB/DELL_ORGANIZATIONAL_GROUPS/DELL_GLOBAL/Content%20Team/Grey%20TPM%20Lat%207350%201.png Still an issue in Linux 5.4-rc7 Dell XPS 9360 with latest BIOS running with SETUP to "factory defaults", which has the TPM disabled (per above). /sys/class/dmi/id: bios_date:05/26/2019 bios_vendor:Dell Inc. bios_version:2.12.0 board_name:0839Y6 /sys/class/mei/mei0: dev_state:ENABLED fw_status:94000245 fw_status:82218506 fw_status:00000030 fw_status:00684004 fw_status:00001F01 fw_status:47C00BC9 fw_ver:0:11.8.65.3590 fw_ver:0:11.8.65.3590 fw_ver:0:11.5.1.1006 hbm_ver:2.0 hbm_ver_drv:2.1 Hi Tomas, what can we do to debug this? This is not a kernel driver issue as far as I understand, but fw one, which busy with some bookkeeping task. I've provided all the data to the fw team, as you pointed out in the issue description this happens %1 of the time, so I'm trying to understand if reflects the priority of this issue in real life. |
Created attachment 280543 [details] Example of mei_me slowness from CFL-H machine in S3 resume On several machines, including a Dell XPS13 9360, the mei_me device sometimes takes over 2,000 ms to resume. All of resume waits for this device to complete when this happens. In endurance tests of 2,000 suspend/resume cycles, mei_me behaves this way about 20 times (about 1% of the time). This is seen on both suspend to mem (ACPI S3) and also s2idle.