Lines Matching full:system

34 is the long term performance of the new file system.
39 that itself contains many directories (to force the system
48 disk request queue on the old file system.
50 Table 2 summarizes the measured throughput of the new file system.
57 operating system does not affect the results.
59 the first to get the system into a known state
73 As Table 2 shows, all file system test runs were on a VAX 11/750.
76 The same number of system calls were performed in all tests;
77 the basic system call overhead was a negligible portion of
86 File System	Bus Measured	Speed	Bandwidth	% CPU
101 File System	Bus Measured	Speed	Bandwidth	% CPU
114 Unlike the old file system,
115 the transfer rates for the new file system do not
119 The measurements in Table 2 were based on a file system
126 of the effective utilization of the disk by the file system.
131 the file system is able to achieve as a percentage of this rate.
132 Using this metric, the old file system is only
134 while the new file system uses up to 47%
137 Both reads and writes are faster in the new system than in the old system.
139 block size used by the new file system.
140 The overhead of allocating blocks in the new system is greater
141 than the overhead of allocating blocks in the old system,
142 however fewer blocks need to be allocated in the new system
147 In the new file system, the reading rate is always at least
152 as the read rates in the 8192 byte block file system;
154 file system.
159 In contrast the old file system is about 50%
161 This is because the write system call is asynchronous and
170 the read system call is processed synchronously so
176 In the new system the blocks of a file are more optimally
183 Hence the disk seek latencies that limited the old file system
184 have little effect in the new file system.
185 The cost of allocation is the factor in the new system that 
188 The performance of the new file system is currently
191 system's address space to data buffers in the user's
200 user interface to the file system in two major ways:
210 Each track holds exactly two or three 8192 byte file system blocks,
211 or four or six 4096 byte file system blocks.
225 would require rewriting all the disk drivers in the system,
230 A technique used by the DEMOS file system
234 By batching up allocations, the system can reduce the
241 a write system call and, once again, the