Hello everybody,
I have set up a minimal devuan system on a spare partition to play around with music.
If I play my midi keyboard with fluidsynth there is no noticeable latency, but if I play it with linuxsampler I can see a slight delay.
So, I have installed a second kernel, low-latency liquorix-6.0.0-10.1-amd64 to see if it would improve performance.
I could not see any significant improvement.
My laptop is a Toshiba Satellite with the following characteristics:
Code: Select all
sudo lshw
description: Notebook
product: Satellite C55-B (PSCMNU)
vendor: TOSHIBA
version: PSCMNU-01SNB1
serial: ZE091570P
width: 64 bits
capabilities: smbios-2.8 dmi-2.8 smp vsyscall32
configuration: boot=normal chassis=notebook family=* sku=PSCMNU uuid=05E5289C-7C4D-11E4-85C7-F0761C4DCFB0
*-core
description: Motherboard
product: ZBWAA
vendor: TOSHIBA
physical id: 0
version: 1.00
serial: *
slot: *
*-firmware
description: BIOS
vendor: TOSHIBA
physical id: 0
version: 1.60
date: 11/27/2014
size: 64KiB
capacity: 1MiB
capabilities: pci upgrade shadowing cdboot bootselect socketedrom edd int13floppy1200 int13floppy720 int13floppy2880 int5printscreen int14serial int17printer acpi usb biosbootspecification uefi
*-memory
description: System Memory
physical id: e
slot: System board or motherboard
size: 4GiB
*-bank:0
description: DIMM DDR3 1333 MHz (0.8 ns)
product: M471B5173DB0-YK0
vendor: Samsung
physical id: 0
serial: 18219D3F
slot: A1_DIMM0
size: 4GiB
width: 64 bits
clock: 1333MHz (0.8ns)
*-bank:1
description: DIMM [empty]
product: Array1_PartNumber1
vendor: A1_Manufacturer1
physical id: 1
serial: A1_SerNum1
slot: A1_DIMM1
*-cache:0
description: L1 cache
physical id: 18
slot: CPU Internal L1
size: 112KiB
capacity: 112KiB
capabilities: internal write-back
configuration: level=1
*-cache:1
description: L2 cache
physical id: 19
slot: CPU Internal L2
size: 1MiB
capacity: 1MiB
capabilities: internal write-back unified
configuration: level=2
*-cpu
description: CPU
product: Intel(R) Celeron(R) CPU N2840 @ 2.16GHz
vendor: Intel Corp.
physical id: 1a
bus info: cpu@0
version: Intel(R) Celeron(R) CPU N2840 @ 2.16GHz
slot: SOCKET 0
size: 2583MHz
width: 64 bits
clock: 83MHz
capabilities: lm fpu fpu_exception wp vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp x86-64 constant_tsc arch_perfmon pebs bts rep_good nopl xtopology tsc_reliable nonstop_tsc cpuid aperfmperf tsc_known_freq pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm sse4_1 sse4_2 movbe popcnt tsc_deadline_timer rdrand lahf_lm 3dnowprefetch epb pti tpr_shadow vnmi flexpriority ept vpid tsc_adjust smep erms dtherm ida arat cpufreq
configuration: cores=2 enabledcores=2 threads=2
*-pci
description: Host bridge
product: Atom Processor Z36xxx/Z37xxx Series SoC Transaction Register
vendor: Intel Corporation
physical id: 100
bus info: pci@0000:00:00.0
version: 0e
width: 32 bits
clock: 33MHz
configuration: driver=iosf_mbi_pci
resources: irq:0
*-display
description: VGA compatible controller
product: Atom Processor Z36xxx/Z37xxx Series Graphics & Display
vendor: Intel Corporation
physical id: 2
bus info: pci@0000:00:02.0
version: 0e
width: 32 bits
clock: 33MHz
capabilities: pm msi vga_controller bus_master cap_list rom
configuration: driver=i915 latency=0
resources: irq:91 memory:d0000000-d03fffff memory:c0000000-cfffffff ioport:f080(size=8) memory:c0000-dffff
*-sata
description: SATA controller
product: Atom Processor E3800 Series SATA AHCI Controller
vendor: Intel Corporation
physical id: 13
bus info: pci@0000:00:13.0
logical name: scsi0
logical name: scsi1
version: 0e
width: 32 bits
clock: 66MHz
capabilities: sata msi pm ahci_1.0 bus_master cap_list emulated
configuration: driver=ahci latency=0
resources: irq:90 ioport:f070(size=8) ioport:f060(size=4) ioport:f050(size=8) ioport:f040(size=4) ioport:f020(size=32) memory:d0816000-d08167ff
*-disk
description: ATA Disk
product: HGST HTS545050A7
physical id: 0
bus info: scsi@0:0.0.0
logical name: /dev/sda
version: AH20
serial: 141120TM8513TD1SRNSM
size: 465GiB (500GB)
capabilities: partitioned partitioned:dos
configuration: ansiversion=5 logicalsectorsize=512 sectorsize=4096 signature=731c80f0
*-volume:0
description: EXT4 volume
vendor: Linux
physical id: 1
bus info: scsi@0:0.0.0,1
logical name: /dev/sda1
logical name: /
version: 1.0
serial: c3a16f36-3544-4e30-8f3f-f47836ba25d4
size: 30GiB
capacity: 30GiB
capabilities: primary bootable journaled extended_attributes large_files huge_files dir_nlink 64bit extents ext4 ext2 initialized
configuration: created=2022-10-07 09:53:28 filesystem=ext4 label=Devuan lastmountpoint=/ modified=2023-05-23 13:54:09 mount.fstype=ext4 mount.options=rw,relatime,errors=remount-ro mounted=2023-05-23 11:43:58 state=mounted
*-volume:1
description: Extended partition
physical id: 2
bus info: scsi@0:0.0.0,2
logical name: /dev/sda2
size: 435GiB
capacity: 435GiB
capabilities: primary extended partitioned partitioned:extended
*-logicalvolume:0
description: EXT4 volume
vendor: Linux
physical id: 5
logical name: /dev/sda5
logical name: /media/mac/Files
version: 1.0
serial: 711911f1-7502-4b4d-b9f9-2b5eb29d5081
size: 390GiB
capacity: 390GiB
capabilities: journaled extended_attributes large_files huge_files dir_nlink recover extents ext4 ext2 initialized
configuration: created=2022-09-11 21:00:32 filesystem=ext4 label=Files lastmountpoint=/media/mac/Files modified=2023-05-23 13:54:22 mount.fstype=ext4 mount.options=rw,relatime mounted=2023-05-23 13:54:22 state=mounted
*-logicalvolume:1
description: EXT4 volume
vendor: Linux
physical id: 6
logical name: /dev/sda6
logical name: /media/root/Devuan Devel
version: 1.0
serial: 7aba8942-b5cc-4d60-acc0-7e97a34a5f57
size: 20GiB
capacity: 20GiB
capabilities: journaled extended_attributes large_files huge_files dir_nlink recover 64bit extents ext4 ext2 initialized
configuration: created=2022-09-16 12:58:11 filesystem=ext4 label=Devuan Devel lastmountpoint=/media/root/Devuan Devel modified=2023-05-23 14:28:07 mount.fstype=ext4 mount.options=rw,nosuid,nodev,noexec,noatime mounted=2023-05-23 14:28:07 state=mounted
*-logicalvolume:2
description: EXT4 volume
vendor: Linux
physical id: 7
logical name: /dev/sda7
version: 1.0
serial: b2feaaf3-a841-41d6-9eb1-50571946d3ad
size: 14GiB
capacity: 14GiB
capabilities: journaled extended_attributes large_files huge_files dir_nlink recover 64bit extents ext4 ext2 initialized
configuration: created=2023-05-16 15:18:02 filesystem=ext4 label=Fedora lastmountpoint=/media/root/Fedora modified=2023-05-23 11:44:38 mounted=2023-05-23 11:44:38 state=clean
*-logicalvolume:3
description: EXT4 volume
vendor: Linux
physical id: 8
logical name: /dev/sda8
version: 1.0
serial: e2d6bbf2-9633-47ac-aeae-28e418395bf8
size: 9997MiB
capacity: 9997MiB
capabilities: journaled extended_attributes large_files huge_files dir_nlink 64bit extents ext4 ext2 initialized
configuration: created=2023-05-13 13:25:59 filesystem=ext4 label=Debian lastmountpoint=/media/root/Debian modified=2023-05-23 11:30:45 mounted=2023-05-23 11:00:52 state=clean
*-cdrom
description: DVD-RAM writer
product: CDDVDW SU-208FB
vendor: TSSTcorp
physical id: 1
bus info: scsi@1:0.0.0
logical name: /dev/cdrom
logical name: /dev/cdrw
logical name: /dev/dvd
logical name: /dev/dvdrw
logical name: /dev/sr0
version: TF01
capabilities: removable audio cd-r cd-rw dvd dvd-r dvd-ram
configuration: ansiversion=5 status=nodisc
*-usb
description: USB controller
product: Atom Processor Z36xxx/Z37xxx, Celeron N2000 Series USB xHCI
vendor: Intel Corporation
physical id: 14
bus info: pci@0000:00:14.0
version: 0e
width: 64 bits
clock: 33MHz
capabilities: pm msi xhci bus_master cap_list
configuration: driver=xhci_hcd latency=0
resources: irq:93 memory:d0800000-d080ffff
*-generic
description: Encryption controller
product: Atom Processor Z36xxx/Z37xxx Series Trusted Execution Engine
vendor: Intel Corporation
physical id: 1a
bus info: pci@0000:00:1a.0
version: 0e
width: 32 bits
clock: 33MHz
capabilities: pm msi bus_master cap_list
configuration: driver=mei_txe latency=0
resources: irq:92 memory:d0500000-d05fffff memory:d0400000-d04fffff
*-multimedia
description: Audio device
product: Atom Processor Z36xxx/Z37xxx Series High Definition Audio Controller
vendor: Intel Corporation
physical id: 1b
bus info: pci@0000:00:1b.0
version: 0e
width: 64 bits
clock: 33MHz
capabilities: pm msi bus_master cap_list
configuration: driver=snd_hda_intel latency=0
resources: irq:95 memory:d0810000-d0813fff
*-pci:0
description: PCI bridge
product: Atom Processor E3800 Series PCI Express Root Port 1
vendor: Intel Corporation
physical id: 1c
bus info: pci@0000:00:1c.0
version: 0e
width: 32 bits
clock: 33MHz
capabilities: pci pciexpress msi pm normal_decode bus_master cap_list
configuration: driver=pcieport
resources: irq:87 ioport:1000(size=4096)
*-pci:1
description: PCI bridge
product: Atom Processor E3800 Series PCI Express Root Port 2
vendor: Intel Corporation
physical id: 1c.1
bus info: pci@0000:00:1c.1
version: 0e
width: 32 bits
clock: 33MHz
capabilities: pci pciexpress msi pm normal_decode bus_master cap_list
configuration: driver=pcieport
resources: irq:88 ioport:2000(size=4096) memory:d0700000-d07fffff
*-network
description: Wireless interface
product: AR9485 Wireless Network Adapter
vendor: Qualcomm Atheros
physical id: 0
bus info: pci@0000:02:00.0
logical name: wlan0
version: 01
serial: ac:b5:7d:90:83:9f
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list rom ethernet physical wireless
configuration: broadcast=yes driver=ath9k driverversion=5.10.0-23-amd64 firmware=N/A ip=192.168.1.69 latency=0 link=yes multicast=yes wireless=IEEE 802.11
resources: irq:17 memory:d0700000-d077ffff memory:d0780000-d078ffff
*-pci:2
description: PCI bridge
product: Atom Processor E3800 Series PCI Express Root Port 3
vendor: Intel Corporation
physical id: 1c.2
bus info: pci@0000:00:1c.2
version: 0e
width: 32 bits
clock: 33MHz
capabilities: pci pciexpress msi pm normal_decode bus_master cap_list
configuration: driver=pcieport
resources: irq:89 ioport:3000(size=4096) memory:d0600000-d06fffff
*-generic
description: Unassigned class
product: RTS5229 PCI Express Card Reader
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:03:00.0
version: 01
width: 32 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list
configuration: driver=rtsx_pci latency=0
resources: irq:94 memory:d0600000-d0600fff
*-isa
description: ISA bridge
product: Atom Processor Z36xxx/Z37xxx Series Power Control Unit
vendor: Intel Corporation
physical id: 1f
bus info: pci@0000:00:1f.0
version: 0e
width: 32 bits
clock: 33MHz
capabilities: isa bus_master cap_list
configuration: driver=lpc_ich latency=0
resources: irq:0
*-serial
description: SMBus
product: Atom Processor E3800 Series SMBus Controller
vendor: Intel Corporation
physical id: 1f.3
bus info: pci@0000:00:1f.3
version: 0e
width: 32 bits
clock: 33MHz
capabilities: pm cap_list
configuration: driver=i801_smbus latency=0
resources: irq:18 memory:d0814000-d081401f ioport:f000(size=32)
*-pnp00:00
product: PnP device PNP0b00
physical id: 1
capabilities: pnp
configuration: driver=rtc_cmos
*-pnp00:01
product: PnP device PNP0c02
physical id: 2
capabilities: pnp
configuration: driver=system
*-pnp00:02
product: PnP device TOS0330
physical id: 3
capabilities: pnp
configuration: driver=i8042 aux
*-pnp00:03
product: PnP device TOS1106
physical id: 4
capabilities: pnp
configuration: driver=i8042 kbd
*-pnp00:04
product: PnP device PNP0c02
physical id: 5
capabilities: pnp
configuration: driver=system
As you can see, this computer is not precisely high-end, so here's my question:
I'm considering creating a small music-dedicated live iso to run on ram (based on slax, since av linux is quite heavy on resources).
Before compiling a low-latency kernel to go with it, I'd like to know if such kernel would be worth the trouble running on my hardware.
Thanks for your feedback.