#
# tuned configuration
#

[main]
summary=Broadly applicable tuning that provides excellent performance across a variety of common server workloads

[variables]
thunderx_cpuinfo_regex=CPU part\s+:\s+(0x0?516)|(0x0?af)|(0x0?a[0-3])|(0x0?b8)\b

[cpu]
governor=performance
energy_perf_bias=performance
min_perf_pct=100
energy_performance_preference=performance

[acpi]
platform_profile=performance

[vm]
# If a workload mostly uses anonymous memory and it hits this limit, the entire
# working set is buffered for I/O, and any more write buffering would require
# swapping, so it's time to throttle writes until I/O can catch up.  Workloads
# that mostly use file mappings may be able to use even higher values.
#
# The generator of dirty data starts writeback at this percentage (system default
# is 20%)
dirty_bytes = 40%

# Start background writeback (via writeback threads) at this percentage (system
# default is 10%)
dirty_background_bytes = 10%

# Marvell ThunderX
[vm.thunderx]
type=vm
uname_regex=aarch64
cpuinfo_regex=${thunderx_cpuinfo_regex}
transparent_hugepages=never

[disk]
# The default unit for readahead is KiB.  This can be adjusted to sectors
# by specifying the relevant suffix, eg. (readahead => 8192 s). There must
# be at least one space between the number and suffix (if suffix is specified).
readahead=>4096

[sysctl]
# PID allocation wrap value.  When the kernel's next PID value
# reaches this value, it wraps back to a minimum PID value.
# PIDs of value pid_max or larger are not allocated.
#
# A suggested value for pid_max is 1024 * <# of cpu cores/threads in system>
# e.g., a box with 32 cpus, the default of 32768 is reasonable, for 64 cpus,
# 65536, for 4096 cpus, 4194304 (which is the upper limit possible).
#kernel.pid_max = 65536

# The swappiness parameter controls the tendency of the kernel to move
# processes out of physical memory and onto the swap disk.
# 0 tells the kernel to avoid swapping processes out of physical memory
# for as long as possible
# 100 tells the kernel to aggressively swap processes out of physical memory
# and move them to swap cache
vm.swappiness=10

# The default kernel value 128 was over twenty years old default,
# kernel-5.4 increased it to 4096, thus do not have it lower than 2048
# on older kernels
net.core.somaxconn=>2048

# Marvell ThunderX
[sysctl.thunderx]
type=sysctl
uname_regex=aarch64
cpuinfo_regex=${thunderx_cpuinfo_regex}
kernel.numa_balancing=0

[video]
panel_power_savings=0