Python | time.clock_getres() method
Last Updated :
17 Sep, 2019
Time module in Python provides various time-related functions. This module comes under Python’s standard utility modules.
time.clock_getres()
method of Time module is used to get the resolution or precision of the specified clock clk_id. Basically, clk_id is a integer value which represents the id of the clock.
Following are the constants available on UNIX platforms that can be used as value of clk_id parameter:
clk_id |
clk_id constant |
Meaning |
0
| time.CLOCK_REALTIME |
System-wide real-time clock |
1
| time.CLOCK_PROCESS_CPUTIME_ID |
High-resolution per-process timer from the CPU |
2
| time.CLOCK_MONOTONIC |
It represents monotonic time since some unspecified starting point |
3
| time.CLOCK_THREAD_CPUTIME_ID |
Thread-specific CPU-time clock |
4
| time.CLOCK_MONOTONIC_RAW |
Similar to time.CLOCK_MONOTONIC, but provides access to a raw hardware-based time that is not subject to NTP adjustments |
Note: time.clock_getres()
method is only available on UNIX-like systems.
Syntax: time.clock_getres(clk_id)
Parameter:
clk_id: A clk_id constant or an integer value representing clk_id of the clock.
Return type: This method returns a float value which represents the precision or resolution of specified clock clk_id.
Code #1: Use of time.clock_getres()
method
import time
clk_id1 = time.CLOCK_REALTIME
clk_id2 = time.CLOCK_MONOTONIC
clk_id3 = time.CLOCK_MONOTONIC
clk_id4 = time.CLOCK_THREAD_CPUTIME_ID
clk_id5 = time.CLOCK_PROCESS_CPUTIME_ID
precision1 = time.clock_getres(clk_id1)
precision2 = time.clock_getres(clk_id2)
precision3 = time.clock_getres(clk_id3)
precision4 = time.clock_getres(clk_id4)
precision5 = time.clock_getres(clk_id5)
print ( "Precision of system-wide real-time clock:" , precision1)
print ( "Precision of monotonic clock:" , precision2)
print ( "Precision of monotonic (raw-hardware based time) clock:" ,
precision3)
print ( "Precision of thread-specific CPU time clock:" , precision4)
print ( "Precision of per-process time from the CPU:" , precision5)
|
Output:
Precision of system-wide real-time clock: 1e-09
Precision of monotonic clock: 1e-09
Precision of monotonic (raw-hardware based time) clock: 1e-09
Precision of thread-specific CPU time clock: 1e-09
Precision of per-process time from the CPU: 1e-09
Code #2: Using an integer value as parameter of time.clock_getres()
method
import time
clk_id1 = 0
clk_id2 = 2
precision1 = time.clock_getres(clk_id1)
precision2 = time.clock_getres(clk_id2)
print ( "Precision of system-wide real-time clock:" , precision1)
print ( "Precision of monotonic clock:" , precision2)
|
Output:
Precision of system-wide real-time clock: 1e-09
Precision of monotonic clock: 1e-09
Reference: https://docs.python.org/3/library/time.html#time.clock_getres
Like Article
Suggest improvement
Share your thoughts in the comments
Please Login to comment...