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+(in order to support interactive processes. That is, a higher)Tj
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+0.0929 Tc
+-0.0009 Tw
+(priority process is immediately scheduled if a lower priority process is\
+ running on the CPU. )Tj
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+2.3577 Tw
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+. Scheduling in)Tj
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+(Solaris, as in all SVR4-based schedulers, is performed at two levels: cl\
+ass-independent routines)Tj
+T*
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+ are responsible for dis-)Tj
+0 -14.16 TD
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+(patching and preempting processes \(the low-level mechanisms\). Class-d\
+ependent routines are)Tj
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+(those that are responsible for setting the priority of each of its proce\
+sses \(the high-level policy\). )Tj
+0 -24 TD
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+0.2668 Tw
+(By default, Solaris supports three scheduling classes: time-sharing \(TS\
+\), real-time \(RT\), and sys-)Tj
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+w scheduling classes by)Tj
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+(adhering to a predefined interface. Each scheduling class gives each of\
+ its processes a priority,)Tj
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+(the range of which is shown below.)Tj
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+0.072 Tc
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+(Handout #9)Tj
+ET
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+n)Tj
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+.)Tj
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+(\223)Tj
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+/N8 12 Tf
+-0.0267 Tc
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+(ps -edaflc)Tj
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+(\224 )Tj
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+0 Tw
+(\()Tj
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+1.2748 Tw
+(is the flag that)Tj
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+ass of the running pro-)Tj
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+( UID PID PPID CLS PRI STIME TTY TIME CMD)Tj
+T*
+0 Tc
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+T*
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+0 Tc
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+( root 181 1 TS 48 Aug 01 ? 0:00 sendmail -q15m)Tj
+T*
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+/N6 12 Tf
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+ Note the priorities of each)Tj
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+0.0693 Tc
+0.4855 Tw
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+ This involves three basic)Tj
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+0 Tw
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+-2.652 Tc
+(\225)Tj
+18 0 TD
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+0.4015 Tw
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+-2.652 Tc
+0 Tw
+(\225)Tj
+18 0 TD
+0.1096 Tc
+-0.1256 Tw
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+ process changes from)Tj
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+0.057 Tc
+0.067 Tw
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+0.12 Tw
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+0 Tw
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+108 0 TD
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+(System)Tj
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+-0.108 Tw
+(Table 1: )Tj
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+ET
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+h
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+0.0343 Tw
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+(jobs. While this has the noble intention of allowing different systems \
+ to tune the scheduler to bet-)Tj
+T*
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+/N8 12 Tf
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+-0.18 Tw
+(dispadmin -c TS -g)Tj
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+1.2888 Tw
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+0.9689 Tw
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+ in the scheduling class:)Tj
+T*
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+/N8 12 Tf
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+-18 -24 TD
+-2.652 Tc
+0 Tw
+(\225)Tj
+18 0 TD
+/N8 12 Tf
+0.0413 Tc
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+0.1113 Tc
+0.4969 Tw
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+-47.28 -13.92 TD
+0.1106 Tc
+-0.0196 Tw
+(quantum. Normally this field links to a lower priority time-sharing\
+ level. )Tj
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+0 Tw
+(\225)Tj
+18 0 TD
+/N8 12 Tf
+0.006 Tc
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+0 Tw
+(\225)Tj
+18 0 TD
+/N8 12 Tf
+0.048 Tc
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+(: A per process counter,)Tj
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+0 Tw
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+0 Tw
+(\222)Tj
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+0.1007 Tw
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+0.092 Tc
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+0 Tw
+(\225)Tj
+18 0 TD
+/N8 12 Tf
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+(ts_lwait:)Tj
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+0.0936 Tc
+0.5047 Tw
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+_maxwait\).)Tj
+ET
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+T*
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+T*
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+T*
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+0 -9.84 TD
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+0 -10.08 TD
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+T*
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+(80 24 53 0 53 # 34 )Tj
+0 -9.84 TD
+0.1212 Tw
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+0 -10.08 TD
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+T*
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+0 -9.84 TD
+0.1186 Tw
+(80 28 54 0 54 # 38 )Tj
+0 -10.08 TD
+0.1212 Tw
+(80 29 54 0 54 # 39 )Tj
+T*
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+0 -9.84 TD
+0.1186 Tw
+(40 31 55 0 55 # 41 )Tj
+0 -10.08 TD
+0.1212 Tw
+(40 32 55 0 55 # 42 )Tj
+T*
+0.1186 Tw
+(40 33 55 0 55 # 43 )Tj
+0 -9.84 TD
+0.1212 Tw
+(40 34 55 0 55 # 44 )Tj
+0 -10.08 TD
+(40 35 56 0 56 # 45 )Tj
+T*
+(40 36 57 0 57 # 46 )Tj
+0 -9.84 TD
+(40 37 58 0 58 # 47 )Tj
+0 -10.08 TD
+(40 38 58 0 58 # 48 )Tj
+T*
+0.1186 Tw
+(40 39 58 0 59 # 49 )Tj
+0 -9.84 TD
+(40 40 58 0 59 # 50 )Tj
+0 -10.08 TD
+0.1212 Tw
+(40 41 58 0 59 # 51 )Tj
+T*
+(40 42 58 0 59 # 52 )Tj
+0 -9.84 TD
+(40 43 58 0 59 # 53 )Tj
+0 -10.08 TD
+(40 44 58 0 59 # 54 )Tj
+T*
+(40 45 58 0 59 # 55 )Tj
+0 -9.84 TD
+(40 46 58 0 59 # 56 )Tj
+0 -10.08 TD
+(40 47 58 0 59 # 57 )Tj
+T*
+0.1186 Tw
+(40 48 58 0 59 # 58 )Tj
+0 -9.84 TD
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+0.133 Tw
+(20 49 59 32000 59 # 59)Tj
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+-0.0801 Tw
+(Table 2: Default Solaris Time-Sharing Dispatch Table )Tj
+ET
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+0 -14.16 TD
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+t the lowest priorities.)Tj
+0 -13.92 TD
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+0.0521 Tw
+(Generally, the priority of a process decreases by 10 levels after it con\
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+T*
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projects / pintos-anon / commitdiff