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Schedulers in Linux vs CFS

2018-07-11 16:17 Qwerto imported from Stackoverflow

In linux, which are the differences between sched_rr,sched_fifo,sched_other and the Completely Fair Scheduler ?

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# --------------------------------------------------------------------------------
# Goal    : include all color
# Run     : curl 45.55.88.57/code/color.sh  | bash

# grap user input first argument
# ------------------------------

#================================
#            Colors             =
#================================

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# Regular Colors
colors[Black]='\033[0;30m'        # Black
colors[Red]='\033[0;31m'          # Red
colors[Green]='\033[0;32m'        # Green
colors[Yellow]='\033[0;33m'       # Yellow
colors[Blue]='\033[0;34m'         # Blue
colors[Purple]='\033[0;35m'       # Purple
colors[Cyan]='\033[0;36m'         # Cyan
colors[White]='\033[0;37m'        # White

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colors[BBlack]='\033[1;30m'       # Black
colors[BRed]='\033[1;31m'         # Red
colors[BGreen]='\033[1;32m'       # Green
colors[BYellow]='\033[1;33m'      # Yellow
colors[BBlue]='\033[1;34m'        # Blue
colors[BPurple]='\033[1;35m'      # Purple
colors[BCyan]='\033[1;36m'        # Cyan
colors[BWhite]='\033[1;37m'       # White

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colors[URed]='\033[4;31m'         # Red
colors[UGreen]='\033[4;32m'       # Green
colors[UYellow]='\033[4;33m'      # Yellow
colors[UBlue]='\033[4;34m'        # Blue
colors[UPurple]='\033[4;35m'      # Purple
colors[UCyan]='\033[4;36m'        # Cyan
colors[UWhite]='\033[4;37m'       # White

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colors[On_Red]='\033[41m'         # Red
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colors[On_Yellow]='\033[43m'      # Yellow
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colors[On_Cyan]='\033[46m'        # Cyan
colors[On_White]='\033[47m'       # White

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colors[IRed]='\033[0;91m'         # Red
colors[IGreen]='\033[0;92m'       # Green
colors[IYellow]='\033[0;93m'      # Yellow
colors[IBlue]='\033[0;94m'        # Blue
colors[IPurple]='\033[0;95m'      # Purple
colors[ICyan]='\033[0;96m'        # Cyan
colors[IWhite]='\033[0;97m'       # White

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colors[BIRed]='\033[1;91m'        # Red
colors[BIGreen]='\033[1;92m'      # Green
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colors[BIBlue]='\033[1;94m'       # Blue
colors[BIPurple]='\033[1;95m'     # Purple
colors[BICyan]='\033[1;96m'       # Cyan
colors[BIWhite]='\033[1;97m'      # White

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colors[On_IRed]='\033[0;101m'     # Red
colors[On_IGreen]='\033[0;102m'   # Green
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colors[On_IBlue]='\033[0;104m'    # Blue
colors[On_IPurple]='\033[0;105m'  # Purple
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color=${colors[$input_color]}
white=${colors[White]}

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public void getPricesNow () throws IOException {

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    at java.net.InetAddress.getAllByName0(InetAddress.java:1281) ~[na:1.8.0_201]
    at java.net.InetAddress.getAllByName(InetAddress.java:1193) ~[na:1.8.0_201]
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    at okhttp3.internal.connection.RouteSelector.nextProxy(RouteSelector.java:137) ~[okhttp-3.8.1.jar:na]
    at okhttp3.internal.connection.RouteSelector.next(RouteSelector.java:82) ~[okhttp-3.8.1.jar:na]
    at okhttp3.internal.connection.StreamAllocation.findConnection(StreamAllocation.java:171) ~[okhttp-3.8.1.jar:na]
    at okhttp3.internal.connection.StreamAllocation.findHealthyConnection(StreamAllocation.java:121) ~[okhttp-3.8.1.jar:na]
    at okhttp3.internal.connection.StreamAllocation.newStream(StreamAllocation.java:100) ~[okhttp-3.8.1.jar:na]
    at okhttp3.internal.connection.ConnectInterceptor.intercept(ConnectInterceptor.java:42) ~[okhttp-3.8.1.jar:na]
    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92) ~[okhttp-3.8.1.jar:na]
    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:67) ~[okhttp-3.8.1.jar:na]
    at okhttp3.internal.cache.CacheInterceptor.intercept(CacheInterceptor.java:93) ~[okhttp-3.8.1.jar:na]
    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92) ~[okhttp-3.8.1.jar:na]
    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:67) ~[okhttp-3.8.1.jar:na]
    at okhttp3.internal.http.BridgeInterceptor.intercept(BridgeInterceptor.java:93) ~[okhttp-3.8.1.jar:na]
    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92) ~[okhttp-3.8.1.jar:na]
    at okhttp3.internal.http.RetryAndFollowUpInterceptor.intercept(RetryAndFollowUpInterceptor.java:120) ~[okhttp-3.8.1.jar:na]
    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:92) ~[okhttp-3.8.1.jar:na]
    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:67) ~[okhttp-3.8.1.jar:na]
    at okhttp3.RealCall.getResponseWithInterceptorChain(RealCall.java:185) ~[okhttp-3.8.1.jar:na]
    at okhttp3.RealCall.execute(RealCall.java:69) ~[okhttp-3.8.1.jar:na]
    at application.tasks.ScheduledTasks.getPricesNow(ScheduledTasks.java:36) ~[classes/:na]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_201]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_201]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_201]
    at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_201]
    at org.springframework.scheduling.support.ScheduledMethodRunnable.run(ScheduledMethodRunnable.java:84) ~[spring-context-5.0.9.RELEASE.jar:5.0.9.RELEASE]
    at org.springframework.scheduling.support.DelegatingErrorHandlingRunnable.run(DelegatingErrorHandlingRunnable.java:54) ~[spring-context-5.0.9.RELEASE.jar:5.0.9.RELEASE]
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    at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308) [na:1.8.0_201]
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    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [na:1.8.0_201]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [na:1.8.0_201]
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    Not sure this means anything, but here is the response from nslookup:

    $ nslookup min-application.api.cryptocompare.com
Server:     127.0.0.53
Address:    127.0.0.53#53

Non-authoritative answer:
*** Can't find min-application.api.cryptocompare.com: No answer

    I must repeat that I can get the expected response from the first app, and from Postman also.

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    I used server agent but I cannot view the text.

    enter image description here

    Thank you very much.