iTechGuides is reader-supported. When you buy through links on our site, we may earn an affiliate commission. As an Amazon Associate I earn from qualifying purchases. Learn more
If a Linux timestamp repeats, moves backward by one second, or differs from another host around a leap second, first separate two problems: wall-clock behavior and elapsed-time measurement. Keep CLOCK_REALTIME for civil timestamps, but use CLOCK_MONOTONIC (or, for specialized cases, CLOCK_MONOTONIC_RAW) for durations, deadlines, retries, and event ordering. Then ensure exactly one time daemon controls the host and choose one chrony leap policy: system, step, slew, or ignore.
The one-second anomaly is usually not repaired by editing stored timestamps. It is fixed by selecting the right clock in the application, removing competing time services, keeping leap-second data current, and verifying synchronization after the change.
What the one-second error actually means
Linux exposes several clock domains with different guarantees. CLOCK_REALTIME represents UTC-style civil time used for filesystem times, audit records, logs, expiry dates, and timestamps that must remain meaningful after a reboot. It is not an elapsed-time clock. The kernel documentation specifically warns that realtime can jump backward because of a leap-second update, an NTP adjustment, or a userspace settimeofday() operation.
For an inserted leap second, chrony documents the sequence as a one-second backward step when the kernel clock reaches 00:00:00 UTC. A deleted leap second is handled with a forward step at 23:59:59 UTC. Because the normal Linux realtime interface follows POSIX-style civil-time numbering and does not expose a regular numeric 23:59:60 value, two events can receive the same wall-clock second or appear out of order.
#1 Best Overall
- Powerful Turbo Fan:CAGIWIRU Electric Air Duster have reached speed up to 130000RPM,Can efficient remove dust and debris.With LED light and Three Adjustable Speed to meet with different cleaning tasks.
- With Attached USB C Fasting Charging cable.Charing 3 hours,Enjoy up to 240 minutes of use on the lowest setting, For third speed can use for 25mins.with four charging options to meet with your needs.
- Wide Application: attached 5 different nozzles,making it suitable for a variety of scenes, such as car,pet, pc, keyboards, and other electronic devices. It also serves for office and home clean duster.
- Handy Design & Portable:Cordless air duster electric nozzle is Light weight and small size, design and comfortable to hold and space saving, convenient to carry around. You can put it in your room or inside the car without taking up space.
- Economical &Reusable: Built durable materials with a long-lasting battery,our CAGIWIRU air duster it's a sustainable alternative to disposable air cans.
An NTP correction can produce the same symptom even when no leap second is involved. If the daemon discovers that the host is ahead or behind, it may step the wall clock or gradually change its rate. A log that uses realtime for both event labels and duration arithmetic therefore cannot assume that successive numeric timestamps strictly increase.
The important distinction is between a timestamp’s meaning and its ordering. Realtime tells a reader approximately when an event occurred according to civil time, but it is allowed to be corrected. A monotonic reading has no calendar meaning, yet it is suitable for measuring the interval between two events. Treating either clock as if it supplied both guarantees is the usual cause of “negative duration” and “timeout fired early” bugs.
Choose the correct clock for each job
| Clock | Meaning | Can move backward? | NTP frequency adjustment | Use it for | Do not use it for |
|---|---|---|---|---|---|
CLOCK_REALTIME |
System wall clock and civil UTC timestamps | Yes, during leap handling or a clock step | Yes; its rate can be corrected | User-visible time, expiry dates, audit and persisted timestamps | Timeouts, latency, retry intervals, or ordering assumptions |
CLOCK_MONOTONIC |
Elapsed time since an unspecified starting point | No, under normal Linux clock semantics | Its rate may be adjusted to keep elapsed time aligned with system time | Deadlines, durations, watchdogs, retries, latency and event ordering | Persisted timestamps or dates shown to users |
CLOCK_MONOTONIC_RAW |
Raw hardware-derived elapsed time | No, under normal operation | Excludes NTP frequency adjustments | Measurements that specifically require the hardware rate | Long-term civil-time correlation or wall-clock display |
CLOCK_TAI |
Continuous atomic-time reference with leap-second semantics | Does not jump on leap-second updates | Depends on synchronization of the host’s TAI offset | Applications that need an atomic, leap-aware timeline and understand its semantics | Ordinary user-facing UTC dates unless conversion is deliberate |
The practical rule is simple: record both a wall-clock value and a monotonic start or deadline when an operation needs human-readable timestamps and reliable duration measurement. The wall-clock value answers “when,” while the monotonic value answers “how long.” Never subtract two CLOCK_REALTIME readings to decide whether a timeout has expired.
PC Slower Than It Used to Be?
A free scan shows the junk files, broken settings and background clutter dragging Windows down - then fixes them in one click.Free scan · Windows 10 & 11Outdated Drivers Are Slowing You Down
One free scan finds every outdated or missing driver and matches the right update for your exact hardware.Free scan · exact hardware matchCLOCK_TAI is different from merely adding a fixed offset to UTC. Its value depends on the host’s current TAI-UTC information, so consumers must document how values are converted and exchanged. It is appropriate only when downstream code understands atomic-time semantics. For ordinary logs, UTC realtime remains easier to interpret, provided that ordering and duration fields are not derived from it.
Why a leap second can duplicate a displayed second
At an insertion, the announced leap is represented by a correction at the UTC boundary. The kernel can reach the beginning of the next day and then step the realtime value backward by one second. A service that sampled the clock immediately before and after that operation may therefore see the same second twice. A deletion removes a second from the transition and produces the opposite, forward adjustment. Neither behavior means that the hardware timer stopped; it means the civil-time representation was corrected.
The Linux clock_settime(2) documentation also makes clear that CLOCK_REALTIME ignores leap seconds as a regular numeric timeline. Code that expects a literal 23:59:60 value, or assumes every integer second exists exactly once, is not portable across the standard realtime interface. If an application needs to preserve the leap event itself, store an explicit event marker or use a time representation whose leap semantics are documented rather than inferring it from adjacent realtime values.
Diagnose the host before changing leap policy
Changing chrony while another daemon is still active can create repeated steps, unstable offsets, and misleading leap status. Establish which service owns the system clock first.
- Check the common time services:
systemctl status chronyd systemd-timesyncd. - Inspect the overall clock state with
timedatectl statusandtimedatectl show. - Identify distribution-specific configuration files and enabled units. A package may use
chronyd,chrony, or an included configuration directory. - Stop or disable every competing synchronizer. Exactly one service should be allowed to discipline
CLOCK_REALTIME. - Capture a baseline with
date -u. If chrony is active, also runchronyc trackingandchronyc sources -v.
chronyc tracking provides the daemon’s synchronization state and selected-source information; chronyc sources -v shows whether configured sources are reachable and usable. Save this baseline before editing the configuration so that a later change can be correlated with a change in offset or leap status.
Rank #2
- Screen Cleaner is Your Screen’s New Bestfriend! - EVEO is proud to present a screen cleaner that’s perfectly suited for your TV. Meet your new screen cleaner, computer screen cleaner, laptop cleaner, iPad cleaner, Macbook,tv cleaner or any other electronic device. Our screen cleaner spray and wipe along with the included plush microfiber cloth, easily removes dust, fingerprints & other smudges on the screen’s surface. Clean effectively for a streak-free screen
- Gentle on your Screens - Our screen cleaner spray and wipes is compatible to be used even for the most sensitive LCD, LED, CRT, and OLED screens in proper use. Be at ease knowing that this product is compatible with all the major brands: LG, SONY, Samsung, Sharp, iPad, iPhone, Android screens, Kindle, PC monitors - we’ve got you covered! Can be used as LCD screen cleaner, tv cleaner, smart tv screen cleaner, and more
- Premium Super Soft Plush Microfiber Cloth - Included in this efficient screen cleaning kit. This screen cleaner spray and wipe has our signature plush microfiber cloth specially designed to comply with screens and monitors and leave them streak-free. Has been shown to effectively absorbs stubborn stains, zero streaks, and no fiber shedding. Always use this together with our screen cleaner for the best results
- Easy-to-Use Screen Cleaner Kit + microfiber cleaning cloth - The EVEO Screen Cleaning Kit will easily be your new favorite tool when it comes to taking care of the things you love most, quick and easy solution for a streak-free screen. Simply screw on the sprayer gun on the screen cleaner bottle. Spray the cleaning liquid onto the microfiber cloth, then wipe the screen until desired cleanliness & shine is achieved.
- Quality Screen Care Kit Worth Purchasing - Enjoy a convenient Screen Cleaner anytime, anywhere you need it. Your satisfaction is our top priority. We stand behind the quality of our products and that’s why, you shouldn’t be worrying at all. We manufacture the Best Screen Cleaner. and can be used for laptop cleaning kit, laptop screen cleaner, tv screen cleaner for smart tv. MacBook screen cleaner, monitor cleaner or screen cleaner spray for electronic devices with microfiber cleaning cloth
Do not assume that a container has an independent system clock. Containers commonly observe the host’s realtime clock, so a host-level policy change can affect every container at once. Conversely, a containerized process that attempts to set time can make diagnosis harder if it has the required privilege. Check host units, container supervisors, and any hardware-management agent that might issue a manual time change.
Find whether the upstream service smears or announces the leap
NTP providers can handle a leap second in two fundamentally different ways. An announcing service tells clients that an insertion or deletion is pending, allowing the client and kernel to apply a discrete correction. A leap-smearing service changes the clock rate over an interval so that clients experience a gradual offset rather than a one-second step.
Do not combine an independent leap correction with a smearing provider. In particular, a client using a smear must not be configured with chrony’s leapsectz right/UTC directive, because that directive supplies a conventional leap schedule and TAI-UTC data rather than the provider’s smear policy. Mixing the two approaches can make the host differ from the service and from other machines that use the same provider.
Free tools Windows power users keep installed
One-click scans. No signup required.
Document the policy for every upstream source and keep a consistent policy within a cluster. A database node, application node, and logging node that use different smear or insertion behavior can disagree by nearly one second even when each reports that it is synchronized. During an incident, compare the selected source and leap status on each host instead of comparing only their formatted dates.
Select a chrony leap-second mode
In /etc/chrony/chrony.conf, or in the distribution’s included chrony configuration, set leapsecmode deliberately. The four modes have different owners for the correction and different effects on applications.
| Mode | Who performs the correction? | Effect on CLOCK_REALTIME |
When it fits | Important limitation |
|---|---|---|---|---|
system |
The kernel | The kernel applies the leap step | The normal choice when the kernel and system time driver correctly support leap seconds | Relies on kernel leap-second behavior; applications using realtime can see the step |
step |
chronyd |
chronyd steps the wall clock |
Systems where avoiding a kernel leap-second code path is preferable | The wall clock still jumps; realtime-based duration calculations remain unsafe |
slew |
chronyd, by changing the clock rate |
No abrupt one-second jump; the clock remains temporarily offset | Applications that cannot tolerate an instantaneous discontinuity | On Linux with chrony’s default maxslewrate, the one-second correction is spread over 12 seconds |
ignore |
No dedicated correction by that chrony instance | Depends on another authority or the surrounding architecture | Only when another instance controls the system clock or the design intentionally handles the leap elsewhere | Unsafe if it leaves the host without a valid leap policy |
system is chrony’s documented default when the system driver supports leap seconds. Choose step when kernel behavior is known to be problematic but an explicit wall-clock step is acceptable. Choose slew when a temporary one-second offset is safer than a jump. Use ignore only with a clearly identified alternate authority; it is not a general workaround for an unsynchronized host.
The choice is an application contract, not merely a daemon preference. A scheduler that compares realtime deadlines can still fail under slew, because the clock remains offset while the correction is distributed. A log viewer may prefer slew to avoid a visible discontinuity, while a system that must match an external UTC event may require an announced step. Make the tolerance explicit in the service design and test it before a scheduled leap.
Configure and apply the chrony change
- Open the active chrony configuration and add one policy, for example
leapsecmode system,leapsecmode step,leapsecmode slew, orleapsecmode ignore. - Confirm that the selected NTP sources use the same insertion, deletion, or smear convention as the host policy.
- If the reference does not reliably announce leap seconds, add
leapsectz right/UTCand ensure the system timezone data is current. - Reload or restart the single active time service using the method required by the distribution.
- Run
chronyc trackingandchronyc sources -vagain. Inspect the service log for the selected source, synchronization state, and leap status. - If the initial offset is large, use a configured
makesteppolicy for the initial correction rather than manually rewriting application timestamps. The policy should be limited to the startup or initial-synchronization conditions appropriate for the system.
A restart is not required merely because timezone data has been updated for the right/UTC data path, although restarting or reloading the time service is still appropriate after changing its configuration.
Rank #3
- 【Large size】：Measuring 800 x 300 mm/ 31. 5×12 inches, which is wider and taller than others. Large mouse pad can perfectly fit your keyboard and mouse of any size, and there is also ample space for peripherals such as phones, tablets, etc.
- 【LED backlight mouse pad】：Blade Hawks RGB mouse pad provides 7 static modes and 7 dynamic modes will give you the options you are looking for. Power-off memory function remembers the last lighting mode you selected. The super glow fiber Chroma will give you a colorful gaming setup that you want.
- 【Anti-slip rubber base】：Made from Natural rubber, this gaming mousepad will firmly grip your desktop, allowing you to enjoy the ultimate precision in the games you are most passionate about. It also comes with a texture that enhances this ability even further.
- 【Smooth and waterproof surface】: Micro-textured cloth surface, for extremely precise mouse control and a smooth movement. When liquid splashes on the gaming mouse pad, it forms water droplets and slides down. Will not delay your work or gameplay.
- 【Plug and play】: This mouse and keyboard pad is powered by USB, plug and play, no driver required. One button control light modes. Press one time to change the lighting mode, press twice to change the brightness, press and hold about 3 seconds turn ON/OFF.
Keep a copy of the effective configuration and the pre-change tracking output. This makes rollback possible and helps distinguish a leap-policy change from a source outage. Do not edit multiple chrony files without checking which file the service actually includes; a correct directive in an unused file has no effect.
Verify the right/UTC data path when it is intentional
The right/UTC zone includes leap-second information. Chrony’s documented check is:
TZ=right/UTC date -d 'Dec 31 2008 23:59:60'When the data path is correctly installed, the command accepts the leap-second notation instead of treating it as an invalid ordinary civil-time second. This test is meaningful only when the host is intentionally using announced leap-second data. It is not a test to run as a substitute for understanding a provider’s smear policy.
What’s actually slowing this PC down?
Pick the symptom - the matching free tool is one click away.
Keep the timezone database updated through the operating system’s normal update mechanism. A stale database can leave a host without current future leap information even when chrony itself is configured correctly.
Fix the application that produced the bad timestamp
Changing the daemon does not make CLOCK_REALTIME suitable for elapsed-time arithmetic. Update code that measures a timeout, retry interval, request latency, lease duration, or event order.
C and POSIX code
Read a monotonic clock for the deadline and compute the difference using its seconds and nanoseconds. Store the realtime reading separately if the record needs a human-readable timestamp.
#include <time.h>
struct timespec start, now;
clock_gettime(CLOCK_MONOTONIC, &start);
/* perform work */
clock_gettime(CLOCK_MONOTONIC, &now);
long long elapsed_ns =
(long long)(now.tv_sec - start.tv_sec) * 1000000000LL +
(now.tv_nsec - start.tv_nsec);For a timeout, calculate one monotonic deadline and compare every later reading with that deadline. Do not recalculate the deadline from the current wall clock after each retry. If raw hardware-rate measurements are required, substitute CLOCK_MONOTONIC_RAW, understanding that it intentionally excludes NTP frequency adjustments.
Recommended Free Tools
When converting a timespec difference, normalize seconds and nanoseconds or use a duration type that handles the borrow when now.tv_nsec is smaller than start.tv_nsec. The key property is that both readings come from the same clock domain. Mixing a realtime start with a monotonic end produces a number with no defined meaning.
Rank #4
- 【Softer and More Comfortable】Vaydeer wrist rest has unique diamond pattern, which is the combination of softness and aesthetics. The materials of wrist rest are improved into higher quality memory foam and covered with silky smooth lycra. The computer wrist rest makes you as comfortable and cushiony as like rest your wrists on clouds.
- 【Ergonomic Wrist Saver】The wrist rests for keyboard and mouse comes with a 17.32×3.15×0.83 inch keyboard wrist pad and a 5.94×3.15×0.83 inch mouse wrist support. Based on ergonomic design, the unique concave shape is the perfect fit for your wrist joints. The wrist rest pad fits most computer keyboards and laptops, improve hand and wrist posture, release your wrist and arm stress.
- 【Non-Slip Rubber Bottom】Featuring an anti-skid silicone base on the bottom, this wrist keyboard support stays firmly in place on your desk, preventing the padding from sliding around, ensuring stable and consistent wrist support during extended computer sessions.
- 【Better Experience & Pain Relief】Our keyboard arm rest is beneficial to alleviate the soreness caused by direct contact and friction between your arm and a hard desk surface, reducing the risk of wrist fatigue or carpal tunnel. The soft texture of memory foam can evenly distribute the pressure around your wrists and provide good support with just enough give.
- 【Helpful in Multiple Scenarios】Whether you're working, studying, writing, typing, gaming, this keyboard and mouse rest combo is an essential accessory to add comfort and support to your hands and wrists. It’s also a great gift for men, women, family, friend, coworker, gamer, teacher, etc.
When CLOCK_TAI is appropriate
Use CLOCK_TAI only when the application needs a continuous atomic-time reference and can handle the difference between TAI and civil UTC. It is useful for systems that must maintain a leap-aware timeline without the backward leap update seen by realtime. It is not a drop-in replacement for displaying UTC dates, and persisted TAI values require a documented conversion policy for readers and downstream systems.
Persist wall time and elapsed time as different fields
An audit record can contain a realtime UTC timestamp for legal or human interpretation and a monotonic interval measured from the operation’s start. The monotonic value has no meaningful cross-reboot or cross-host epoch, so it should not replace the persisted wall-clock field. Conversely, the wall-clock field should not be used to infer ordering when a leap or NTP step is possible.
For distributed events, include the host identity, the UTC wall-clock value, and an elapsed or sequence value generated by the application. That gives operators a readable date while preserving a local ordering signal when two records share the same displayed second.
Do these 3 things before closing this tab:
1Repair Windows errors before they cause bigger problems2Fix the driver behind crashes, sound loss and screen glitches3Clear out junk files and repair common Windows errorsVerification checklist after the change
- Exactly one enabled service controls
CLOCK_REALTIME. timedatectlreports synchronization, or chrony reports a reachable source and a bounded offset.chronyc trackingshows the expected leap status and a valid selected source.- The
right/UTCcommand accepts23:59:60only when that data path is intentionally configured. - Application tests use monotonic deadlines and do not require realtime timestamps to increase strictly.
- Logs and persisted records distinguish UTC wall-clock timestamps from elapsed-duration measurements.
- The host is compared with an independent trusted time source after synchronization.
- Monitoring remains active long enough to detect repeated one-second steps or a return to an unsynchronized state.
Run the checks after a service restart and again after the host has remained synchronized. A single successful query proves only that the daemon answered at that moment; it does not prove that the source remains reachable or that another service will not step the clock later.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Troubleshoot common outcomes
The clock still jumps after selecting slew
Check for a second daemon or a manual time-setting process. The selected chrony instance cannot prevent another service, container supervisor, hardware-management agent, or administrator command from stepping the clock. Re-run the service checks and inspect logs for settimeofday()-style changes.
Hosts disagree by roughly one second
Compare their upstream policies. One host may be following an announced leap while another follows a smear. Standardize the provider and chrony configuration, then verify each host’s source and leap status.
The leap-second test rejects 23:59:60
Confirm that right/UTC is actually selected, timezone data is current, and the command is being run with the exact TZ=right/UTC environment. If the host is a smear client, do not add the directive merely to make the test pass; use the provider’s documented smear behavior instead.
Quick wins for a faster PC:
Scan for outdated or missing drivers - takes under a minuteDriver Scan →Repair Windows errors before they cause bigger problemsFix Now →Durations become negative or expire early
Search the application for time(), gettimeofday(), or CLOCK_REALTIME used in subtraction or deadline calculations. Replace those reads with CLOCK_MONOTONIC. Leave realtime reads in place where the value is genuinely a civil timestamp.
Best Value
- 【No Drill Mounted】Cable management tray can be assembled in as little as 3 minutes or less-simply. Side clips easily clampe the edge of desk, pass through the holes on the sides, and secure excess cables with baskets. Desk cable management supports inward or outward installation to meet your needs in different scenarios, and provides you with great convenience when collecting and organizing wires.
- 【Rubber Pad Protects Desk】Wire organizer under desk built-in soft rubber pads on the clamp protect your desk from scratches, so you will not damage your furniture or office.
- 【Sturdy and Beautiful】Cord management under desk is made of high-quality carbon steel and holds about 15 lbs. The wire basket has 2 holes on each side of the tray to enable your cables to pass freely. Cable baskets are suitable for desk thickness use from 0.4" to 2.4".
- 【Space Saving & Keep Organized】Desk cable management tray holds all your power cords, outlet strips, USB hubs and computer transformers hidden from your feet, and the data cables will not enter the vacuum cleaner to keep your desk clean and tidy. Desk wire organizer is also suitable for use in the kitchen and outdoors.
- 【Reduce Safety Risks】Cable tray under desk keeps all plugs away from your kids, no more worry about tripping. Using 2 holes wire tray saves extra space, helps you easily cabling and wire protection. The mesh design is not easy to accumulate dust, but avoids safety accidents caused by messy wires.
The host is far from the correct time after boot
Use the daemon’s configured makestep policy for the permitted initial correction and verify the source afterward. Do not “repair” the situation by changing historical timestamps in the database or log files; those records describe what the system previously recorded and should remain auditable.
A restart appears to fix the problem temporarily
A restart can force a fresh synchronization but does not correct an architectural conflict. Check whether a competing service returns at boot, whether the selected source is unstable, and whether application code still subtracts realtime readings. The durable fix is one clock authority plus clock-appropriate application logic.
A safe operational sequence
- Record the current UTC time, synchronization state, active services, and chrony source list.
- Stop competing time daemons and confirm that only one authority remains.
- Classify the upstream as leap-announcing or leap-smearing.
- Choose
system,step,slew, orignoreto match that architecture and the application’s tolerance for a wall-clock jump. - Configure
right/UTConly for an announcing reference that needs local leap data, never for a smear client. - Reload or restart the active service, then inspect tracking, sources, and logs.
- Deploy the application fix: monotonic clocks for elapsed time, realtime for civil timestamps, and TAI only where its atomic-time semantics are required.
- Compare the corrected host with an independent source and monitor for renewed steps or loss of synchronization.
Frequently Asked Questions
Why did my Linux timestamp move backward by one second?
CLOCK_REALTIME can step backward when the kernel handles an inserted leap second, and it can also step during an NTP correction or a userspace time-setting operation. That behavior is valid for a civil wall clock but unsafe for elapsed-time calculations.
How do I fix a one-second timestamp error after a leap second?
Do not rewrite historical records first. Ensure one time daemon controls the host, match chrony’s leap mode to the upstream policy, keep leap-second data current, and change duration and timeout code to use CLOCK_MONOTONIC.
Should I use CLOCK_MONOTONIC instead of CLOCK_REALTIME?
Use monotonic time for durations, deadlines, retries, latency, and event ordering. Keep realtime for user-visible UTC timestamps, expiry dates, audit records, and values that must retain civil-time meaning after a reboot.
When should I use CLOCK_MONOTONIC_RAW?
Use it for specialized measurements that need the raw hardware-derived rate and should exclude NTP frequency adjustments. It is not appropriate for displaying dates or correlating long-term events to UTC.
When is CLOCK_TAI a better choice?
Use CLOCK_TAI when an application needs a continuous atomic-time timeline and can document conversion between TAI and civil UTC. It is not a general replacement for UTC display fields.
The Tool Desk
Outbyte Driver Updater FREEFix the driver behind crashes, sound loss and screen glitchesFind Drivers →Outbyte PC Repair FREERepair Windows errors before they cause bigger problemsFix Now →How do I configure chrony for leap seconds?
Set one deliberate leapsecmode: system, step, slew, or ignore. Use system when kernel handling is trusted, step to let chronyd perform the step, slew to spread the correction, and ignore only when another authority handles it.
Can I use leapsectz right/UTC with a leap-smearing NTP provider?
No. The directive supplies conventional leap scheduling and TAI-UTC data. A smear client must follow the provider’s smear policy instead of independently applying that leap data.
Why does chrony’s slewed correction take time to settle?
With Linux’s default maxslewrate, chrony documents that a one-second leap correction is spread over 12 seconds. The clock avoids an abrupt jump but remains temporarily offset while the rate correction is applied.
The Bottom Line
A leap-second timestamp error is usually a clock-selection and synchronization-policy problem, not damaged data. Use CLOCK_REALTIME for civil timestamps, CLOCK_MONOTONIC for elapsed time, and CLOCK_TAI only for applications designed around atomic time. Run one synchronizer, match chrony’s leap mode to the provider’s announce-or-smear behavior, keep right/UTC data current when appropriate, and verify the host and application after the change.
What’s actually slowing this PC down?
Pick the symptom - the matching free tool is one click away.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
