Re: DPMS wakeup and kernel lock?
On Mon, May 8, 2023 at 3:09 AM Laurence Tratt wrote: > In my `.xsession` I have: > > xidle -no -program "/usr/X11R6/bin/xlock -mode fadeplot -dpmsstandby 180 > -dpmssuspend 0 -dpmsoff 0" -timeout 500 -delay 100 & > > So, after 8 minutes, `xidle` runs `xlock` and after another 3 minutes the > monitor is put into standby mode. > > When the monitor is in standby mode and I later press keys to force it to > wakeup, I think the kernel grabs a lock (the main kernel lock?) that causes > everything to freeze for a bit over a second. I notice this most often if > music is playing -- audio stops completely during this time. > > I don't think this behaviour is particularly worrisome as such, but it made > me wonder if a) such a lock should be held during DPMS wakeup b) whether it > suggests that this part of whatever part of the graphics system is a bit > lock-grab-happy? > > > Laurie > I reproduce on my machine with $ xbacklight -set $any; $ xrandr; or with brightness keys on keyboard the xbacklight/brightness keys are the most disturbing because it can take sometimes like 15-30s of semi-freezes also reported here: https://marc.info/?l=openbsd-bugs=167695780419330=2 regards OpenBSD 7.3-current (GENERIC.MP) #1153: Wed Apr 19 08:48:10 MDT 2023 dera...@amd64.openbsd.org:/usr/src/sys/arch/amd64/compile/GENERIC.MP real mem = 17021566976 (16233MB) avail mem = 16486100992 (15722MB) random: good seed from bootblocks mpath0 at root scsibus0 at mpath0: 256 targets mainbus0 at root bios0 at mainbus0: SMBIOS rev. 3.0 @ 0xb9908000 (58 entries) bios0: vendor LENOVO version "R0GET56W (1.56 )" date 08/31/2017 bios0: LENOVO 20JVS17D00 efi0 at bios0: UEFI 2.5 efi0: Lenovo rev 0x1560 acpi0 at bios0: ACPI 5.0 acpi0: sleep states S0 S3 S4 S5 acpi0: tables DSDT FACP UEFI SSDT SSDT HPET APIC MCFG ECDT SSDT BOOT BATB SLIC SSDT SSDT WSMT SSDT SSDT DBGP DBG2 MSDM DMAR ASF! FPDT UEFI acpi0: wakeup devices GLAN(S4) XHC_(S3) XDCI(S4) HDAS(S4) RP01(S4) RP02(S4) RP04(S4) RP05(S4) RP06(S4) RP07(S4) RP08(S4) RP09(S4) RP10(S4) RP11(S4) RP12(S4) RP13(S4) [...] acpitimer0 at acpi0: 3579545 Hz, 24 bits acpihpet0 at acpi0: 2399 Hz acpimadt0 at acpi0 addr 0xfee0: PC-AT compat cpu0 at mainbus0: apid 0 (boot processor) cpu0: Intel(R) Core(TM) i5-6300U CPU @ 2.40GHz, 2957.06 MHz, 06-4e-03 cpu0: FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,SMX,EST,TM2,SSSE3,SDBG,FMA3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,MOVBE,POPCNT,DEADLINE,AES,XSAVE,AVX,F16C,RDRAND,NXE,PAGE1GB,RDTSCP,LONG,LAHF,ABM,3DNOWP,PERF,ITSC,FSGSBASE,TSC_ADJUST,SGX,BMI1,HLE,AVX2,SMEP,BMI2,ERMS,INVPCID,RTM,MPX,RDSEED,ADX,SMAP,CLFLUSHOPT,PT,SRBDS_CTRL,MD_CLEAR,TSXFA,IBRS,IBPB,STIBP,L1DF,SSBD,SENSOR,ARAT,XSAVEOPT,XSAVEC,XGETBV1,XSAVES,MELTDOWN cpu0: 32KB 64b/line 8-way D-cache, 32KB 64b/line 8-way I-cache, 256KB 64b/line 4-way L2 cache, 3MB 64b/line 12-way L3 cache cpu0: smt 0, core 0, package 0 mtrr: Pentium Pro MTRR support, 10 var ranges, 88 fixed ranges cpu0: apic clock running at 24MHz cpu0: mwait min=64, max=64, C-substates=0.2.1.2.4.1.1.1, IBE cpu1 at mainbus0: apid 2 (application processor) cpu1: Intel(R) Core(TM) i5-6300U CPU @ 2.40GHz, 2860.64 MHz, 06-4e-03 cpu1: FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,SMX,EST,TM2,SSSE3,SDBG,FMA3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,MOVBE,POPCNT,DEADLINE,AES,XSAVE,AVX,F16C,RDRAND,NXE,PAGE1GB,RDTSCP,LONG,LAHF,ABM,3DNOWP,PERF,ITSC,FSGSBASE,TSC_ADJUST,SGX,BMI1,HLE,AVX2,SMEP,BMI2,ERMS,INVPCID,RTM,MPX,RDSEED,ADX,SMAP,CLFLUSHOPT,PT,SRBDS_CTRL,MD_CLEAR,TSXFA,IBRS,IBPB,STIBP,L1DF,SSBD,SENSOR,ARAT,XSAVEOPT,XSAVEC,XGETBV1,XSAVES,MELTDOWN cpu1: 32KB 64b/line 8-way D-cache, 32KB 64b/line 8-way I-cache, 256KB 64b/line 4-way L2 cache, 3MB 64b/line 12-way L3 cache cpu1: smt 0, core 1, package 0 cpu2 at mainbus0: apid 1 (application processor) cpu2: Intel(R) Core(TM) i5-6300U CPU @ 2.40GHz, 2860.64 MHz, 06-4e-03 cpu2: FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,SMX,EST,TM2,SSSE3,SDBG,FMA3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,MOVBE,POPCNT,DEADLINE,AES,XSAVE,AVX,F16C,RDRAND,NXE,PAGE1GB,RDTSCP,LONG,LAHF,ABM,3DNOWP,PERF,ITSC,FSGSBASE,TSC_ADJUST,SGX,BMI1,HLE,AVX2,SMEP,BMI2,ERMS,INVPCID,RTM,MPX,RDSEED,ADX,SMAP,CLFLUSHOPT,PT,SRBDS_CTRL,MD_CLEAR,TSXFA,IBRS,IBPB,STIBP,L1DF,SSBD,SENSOR,ARAT,XSAVEOPT,XSAVEC,XGETBV1,XSAVES,MELTDOWN cpu2: 32KB 64b/line 8-way D-cache, 32KB 64b/line 8-way I-cache, 256KB 64b/line 4-way L2 cache, 3MB 64b/line 12-way L3 cache cpu2: smt 1, core 0, package 0 cpu3 at mainbus0: apid 3 (application processor) cpu3: Intel(R) Core(TM) i5-6300U CPU @ 2.40GHz, 2860.64 MHz, 06-4e-03 cpu3:
DPMS wakeup and kernel lock?
In my `.xsession` I have: xidle -no -program "/usr/X11R6/bin/xlock -mode fadeplot -dpmsstandby 180 -dpmssuspend 0 -dpmsoff 0" -timeout 500 -delay 100 & So, after 8 minutes, `xidle` runs `xlock` and after another 3 minutes the monitor is put into standby mode. When the monitor is in standby mode and I later press keys to force it to wakeup, I think the kernel grabs a lock (the main kernel lock?) that causes everything to freeze for a bit over a second. I notice this most often if music is playing -- audio stops completely during this time. I don't think this behaviour is particularly worrisome as such, but it made me wonder if a) such a lock should be held during DPMS wakeup b) whether it suggests that this part of whatever part of the graphics system is a bit lock-grab-happy? Laurie OpenBSD 7.3-current (GENERIC.MP) #1175: Wed May 3 08:19:33 MDT 2023 dera...@amd64.openbsd.org:/usr/src/sys/arch/amd64/compile/GENERIC.MP real mem = 33381998592 (31835MB) avail mem = 32350654464 (30851MB) random: good seed from bootblocks mpath0 at root scsibus0 at mpath0: 256 targets mainbus0 at root bios0 at mainbus0: SMBIOS rev. 3.5 @ 0xb94dc000 (43 entries) bios0: vendor American Megatrends International, LLC. version "1.92" date 04/28/2023 bios0: Micro-Star International Co., Ltd. MS-7D67 efi0 at bios0: UEFI 2.8 efi0: American Megatrends rev 0x5001a acpi0 at bios0: ACPI 6.4 acpi0: sleep states S0 S3 S4 S5 acpi0: tables DSDT FACP SSDT SSDT FIDT MCFG HPET WDRT UEFI FPDT VFCT BGRT TPM2 SSDT CRAT CDIT BGRT SSDT SSDT SSDT SSDT WSMT APIC SSDT SSDT SSDT IVRS SSDT SSDT SSDT SSDT SSDT SSDT acpi0: wakeup devices GPP3(S4) GPP4(S4) GPP5(S4) GPP6(S4) GP17(S4) XHC0(S4) XHC1(S4) XHC2(S4) GPP0(S4) GPP1(S4) GPP2(S4) GPP7(S4) UP00(S4) DP00(S4) NV00(S4) DP20(S4) [...] acpitimer0 at acpi0: 3579545 Hz, 32 bits acpimcfg0 at acpi0 acpimcfg0: addr 0xf000, bus 0-127 acpihpet0 at acpi0: 14318180 Hz acpimadt0 at acpi0 addr 0xfee0: PC-AT compat cpu0 at mainbus0: apid 0 (boot processor) cpu0: AMD Ryzen 9 7900X 12-Core Processor, 4700.01 MHz, 19-61-02 cpu0: FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,MMX,FXSR,SSE,SSE2,HTT,SSE3,PCLMUL,MWAIT,SSSE3,FMA3,CX16,SSE4.1,SSE4.2,x2APIC,MOVBE,POPCNT,AES,XSAVE,AVX,F16C,RDRAND,NXE,MMXX,FFXSR,PAGE1GB,RDTSCP,LONG,LAHF,CMPLEG,SVM,EAPICSP,AMCR8,ABM,SSE4A,MASSE,3DNOWP,OSVW,IBS,SKINIT,TCE,TOPEXT,CPCTR,DBKP,PCTRL3,MWAITX,ITSC,FSGSBASE,BMI1,AVX2,SMEP,BMI2,ERMS,INVPCID,PQM,AVX512F,AVX512DQ,RDSEED,ADX,SMAP,AVX512IFMA,CLFLUSHOPT,CLWB,AVX512CD,SHA,AVX512BW,AVX512VL,AVX512VBMI,UMIP,PKU,WAITPKG,L1DF,IBPB,IBRS,STIBP,SSBD,XSAVEOPT,XSAVEC,XGETBV1,XSAVES cpu0: 32KB 64b/line 8-way D-cache, 32KB 64b/line 8-way I-cache, 1MB 64b/line 8-way L2 cache, 32MB 64b/line 16-way L3 cache cpu0: smt 0, core 0, package 0 mtrr: Pentium Pro MTRR support, 8 var ranges, 88 fixed ranges cpu0: apic clock running at 25MHz cpu0: mwait min=64, max=64, C-substates=1.1, IBE cpu1 at mainbus0: apid 2 (application processor) cpu1: AMD Ryzen 9 7900X 12-Core Processor, 4700.00 MHz, 19-61-02 cpu1: FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,MMX,FXSR,SSE,SSE2,HTT,SSE3,PCLMUL,MWAIT,SSSE3,FMA3,CX16,SSE4.1,SSE4.2,x2APIC,MOVBE,POPCNT,AES,XSAVE,AVX,F16C,RDRAND,NXE,MMXX,FFXSR,PAGE1GB,RDTSCP,LONG,LAHF,CMPLEG,SVM,EAPICSP,AMCR8,ABM,SSE4A,MASSE,3DNOWP,OSVW,IBS,SKINIT,TCE,TOPEXT,CPCTR,DBKP,PCTRL3,MWAITX,ITSC,FSGSBASE,BMI1,AVX2,SMEP,BMI2,ERMS,INVPCID,PQM,AVX512F,AVX512DQ,RDSEED,ADX,SMAP,AVX512IFMA,CLFLUSHOPT,CLWB,AVX512CD,SHA,AVX512BW,AVX512VL,AVX512VBMI,UMIP,PKU,L1DF,IBPB,IBRS,STIBP,SSBD,XSAVEOPT,XSAVEC,XGETBV1,XSAVES cpu1: 32KB 64b/line 8-way D-cache, 32KB 64b/line 8-way I-cache, 1MB 64b/line 8-way L2 cache, 32MB 64b/line 16-way L3 cache cpu1: smt 0, core 1, package 0 cpu2 at mainbus0: apid 4 (application processor) cpu2: AMD Ryzen 9 7900X 12-Core Processor, 4700.00 MHz, 19-61-02 cpu2: FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,MMX,FXSR,SSE,SSE2,HTT,SSE3,PCLMUL,MWAIT,SSSE3,FMA3,CX16,SSE4.1,SSE4.2,x2APIC,MOVBE,POPCNT,AES,XSAVE,AVX,F16C,RDRAND,NXE,MMXX,FFXSR,PAGE1GB,RDTSCP,LONG,LAHF,CMPLEG,SVM,EAPICSP,AMCR8,ABM,SSE4A,MASSE,3DNOWP,OSVW,IBS,SKINIT,TCE,TOPEXT,CPCTR,DBKP,PCTRL3,MWAITX,ITSC,FSGSBASE,BMI1,AVX2,SMEP,BMI2,ERMS,INVPCID,PQM,AVX512F,AVX512DQ,RDSEED,ADX,SMAP,AVX512IFMA,CLFLUSHOPT,CLWB,AVX512CD,SHA,AVX512BW,AVX512VL,AVX512VBMI,UMIP,PKU,L1DF,IBPB,IBRS,STIBP,SSBD,XSAVEOPT,XSAVEC,XGETBV1,XSAVES cpu2: 32KB 64b/line 8-way D-cache, 32KB 64b/line 8-way I-cache, 1MB 64b/line 8-way L2 cache, 32MB 64b/line 16-way L3 cache cpu2: smt 0, core 2, package 0 cpu3 at mainbus0: apid 6 (application processor) cpu3: AMD Ryzen 9 7900X 12-Core Processor, 4700.00 MHz, 19-61-02 cpu3:
