https://bugzilla.kernel.org/show_bug.cgi?id=215419
--- Comment #5 from Paul Menzel (pmenzel+bugzilla.kernel....@molgen.mpg.de) ---
Tracing `acpi_ds_exec_end_op()` in Linux 5.16.7 shows:
[ 0.000000] microcode: microcode updated early to revision 0xa0b, date =
2010-09-28
[ 0.000000] Linux version 5.16.0-1-amd64
(debian-ker...@lists.debian.org) (gcc-11 (Debian 11.2.0-16) 11.2.0, GNU ld (GNU
Binutils for Debian) 2.37.90.20220130) #1 SMP PREEMPT Debian 5.16.7-2
(2022-02-09)
[ 0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-5.16.0-1-amd64
root=UUID=e17cec4f-d2b8-4cc3-bd39-39a10ed422f4 ro quiet noisapnp
cryptomgr.notests random.trust_cpu=on initcall_debug log_buf_len=32M
trace_buf_size=74631K trace_clock=global
trace_options=nooverwrite,funcgraph-abstime,funcgraph-cpu,funcgraph-duration,funcgraph-proc,funcgraph-tail,nofuncgraph-overhead,context-info,graph-time
ftrace=function_graph ftrace_graph_max_depth=3
ftrace_graph_filter=acpi_ds_exec_end_op
[…]
[ 0.885867] PCI: Using host bridge windows from ACPI; if necessary, use
"pci=nocrs" and report a bug
[ 0.887934] ACPI: Enabled 15 GPEs in block 00 to 3F
[…]
```
0.909187 | 0) swapper-1 | | acpi_ds_exec_end_op() {
0.909187 | 0) swapper-1 | |
acpi_ds_create_operands() {
0.909188 | 0) swapper-1 | 1.343 us |
acpi_ds_create_operand();
0.909189 | 0) swapper-1 | 2.040 us | } /*
acpi_ds_create_operands */
0.909190 | 0) swapper-1 | |
acpi_ex_resolve_operands() {
0.909190 | 0) swapper-1 | 0.305 us |
acpi_ps_get_opcode_info();
0.909191 | 0) swapper-1 | 0.371 us |
acpi_ut_valid_object_type();
0.909192 | 0) swapper-1 | 0.321 us |
acpi_ex_resolve_to_value();
0.909192 | 0) swapper-1 | 0.360 us |
acpi_ex_convert_to_integer();
0.909193 | 0) swapper-1 | 3.042 us | } /*
acpi_ex_resolve_operands */
0.909193 | 0) swapper-1 | |
acpi_ex_opcode_1A_0T_0R() {
0.909194 | 0) swapper-1 | @ 107530.6 us |
acpi_ex_system_do_sleep();
1.016727 | 0) swapper-1 | @ 107531.5 us | } /*
acpi_ex_opcode_1A_0T_0R */
1.016727 | 0) swapper-1 | |
acpi_ds_clear_operands() {
1.016728 | 0) swapper-1 | 1.749 us |
acpi_ut_remove_reference();
1.016730 | 0) swapper-1 | 2.506 us | } /*
acpi_ds_clear_operands */
1.016730 | 0) swapper-1 | 0.306 us |
acpi_ex_truncate_for32bit_table();
1.016731 | 0) swapper-1 | @ 107541.6 us | } /* acpi_ds_exec_end_op
*/
```
`acpi_ex_system_do_sleep()` runs 107 ms, so there is some sleep specified in
the ACPI tables? I disassembled them, and searched for *sleep* but didn’t
notice anything. I am going to attach the acpidump output in the next days.
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