The Design and Implementation of the Anykernel and Rump Kernels

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20 ISA LGPL LRU LWP MD MI MMU NIC OS PIC PR RTT RUMP Instruction Set Architecture Lesser GPL; a less restrictive variant of GPL Least Recently Used Light Weight Process; the kernel’s idea of a thread. This acronym is usually written in lowercase (lwp) to mimic the kernel structure name (struct lwp). Machine Dependent [code]; [code] specific to the platform Machine Independent [code]; [code] usable on all platforms Memory Management Unit: hardware unit which handles memory access and does virtual-to-physical translation for memory addresses Network Interface Controller Operating System Position Independent Code; code which uses relative addressing and can be loaded at any location. It is typically used in shared libraries, where the load address of the code can vary from one process to another. Problem Report Round Trip Time Deprecated “backronym” denoting a rump kernel and its local client application. This backronym should not appear in any material written since mid-2010.
21 SLIP TLS TLS UML USB VAS VM VMM Serial Line IP: protocol for framing IP datagrams over a serial line. Thread-Local Storage; private per-thread data Transport Layer Security User Mode Linux Universal Serial Bus Virtual Address Space Virtual Memory; the abbreviation is context dependent and can mean both virtual memory and the kernel’s virtual memory subsystem Virtual Machine Monitor
Page 1: Department of Computer Science and
Page 11 and 12: 9 Preface Meet the new boss Same as
Page 13: 11 Then there is my dear Xi, who, s
Page 16 and 17: 14 2.3.3 InterruptsandPreemption...
Page 18 and 19: 16 4.1.1 Implementation Effort ....
Page 20 and 21: 18 Appendix C Patches to the 5.99.4
Page 25 and 26: 23 List of Figures 2.1 Rumpkernelhi
Page 27: 25 4.14 Time to execute 5M system c
Page 31 and 32: 29 1 Introduction In its classic ro
Page 33 and 34: 31 and application-level drivers. T
Page 35 and 36: 33 We define an anykernel to be an
Page 37 and 38: 35 Our implementation supports rump
Page 39 and 40: 37 The project was done in small in
Page 41 and 42: 39 2 The Anykernel and Rump Kernels
Page 43 and 44: 41 building on top of the entities
Page 45 and 46: 43 Drivers in a rump kernel remain
Page 47 and 48: 45 Figure 2.1: Rump k
Page 49 and 50: 47 in Section 3.2.3. Whenever discu
Page 51 and 52: 49 int rumpns_bpfopen(dev_t, int, i
Page 53 and 54: 51 Figure 2.4:
Page 55 and 56: 53 while the application logic stil
Page 57 and 58: 55 We must solve the lack of a rump
Page 59 and 60: 57 2.3.1 Kernel threads Up until no
Page 61 and 62: 59 void * pool_cache_get_paddr(pool
Page 63 and 64: 61 2.3.4 An Example We present an e
Page 65 and 66: 63 Figure 2.6: Prov
Page 67: 65 The straightforward use of exist
Page 70 and 71: 68 We identified three obstacles fo
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70 for loadable kernel modules (dis
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72 e.g. the routine for mapping a p
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74 3.2.1 C Symbol Namespaces In the
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76 the double underscore namespace
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78 since the representation might n
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80 The following rumpuser interface
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82 The entry point rump_schedule()
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84 3.3.1 CPU Scheduling Recall from
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86 The fastpath is taken in cases w
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88 Releasing a CPU requires the fol
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90 10 8 seconds 6 4 2 0 1CPU 2CPU n
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92 Hardware interrupt handlers are
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94 Due to the design choice that a
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96 in. Therefore, we should critica
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98 Pager window create+access time
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100 A rump kernel can be configured
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102 Since all pages managed by the
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104 not in control of thread schedu
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106 synchronization part of the alg
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108 /* * Run a cross call to cycle
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110 kernel needs to do is make sure
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112 The kernel with uniprocessor lo
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114 the header file while open() c
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116 The same wrapper works both for
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118 5. Some calling conventions (e.
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120 int rump_pub_lwproc_rfork(int a
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122 By convention, file system devi
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124 ule directory tree from /stand
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126 After these steps have been per
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128 Host Dynamic Linker Using the h
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130 for (i = 0; i < SYS_NSYSENT; i+
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132 into a rump kernel and the driv
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134 sys/arch/x86/include/cpu.h: #de
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136 3.8.4 Rump Component Init Routi
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138 RUMP_COMPONENT(RUMP_COMPONENT_N
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140 We have three distinct cases we
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142 # ifconfig tap0 create # ifconf
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144 Unprivileged use of host’s ne
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146 DOMAIN_DEFINE(sockindomain); co
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148 issue another write before the
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150 using an interface called USBDI
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152 The kernel device configuration
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154 # $NetBSD: UMASS.ioconf,v 1.4 2
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156 USB Host Controller Hub0 (root)
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158 Figure 3.30: File s
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160 in-kernel mount: /dev/sd0e /m/u
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162 structure being created by rump
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164 3.12.1 Client-Kernel Locators B
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166 A tmpfs server listening on INA
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168 Request Arguments Response Desc
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170 Host syscall rump syscall 1. op
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172 A client’s initial connection
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174 their system calls to a rump ke
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176 stdin/stdout, the new file desc
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178 Supporting fork() Recall, the f
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180 As with fork, most of the kerne
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182 Anecdotal analysis For several
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184
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186 SLOC 8000 7000 6000 5000 4000 3
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188 Total commits to the kernel 9,6
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190 120 build time (minutes) 100 80
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192 4.2.2 makefs For a source tree
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194 not include later debugging [76
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196 the necessary tools such as mak
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198 proach of supplying alternate c
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200 are not out-of-the-box compatib
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202 golem> mount -t msdos -o rump /
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204 Full OS By a full OS we mean a
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206 • Rapid prototyping: One of t
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208 4.5.3 Testing: Case Studies We
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210 static void scsitest_request(st
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212 waits for the timeout and check
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214 • We noticed that even in sup
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216 which were discovered during wr
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218 version swap no swap NetBSD 5.1
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220 It needs to be stressed that Ta
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222 Network clusters Bootstrapping
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224 8 7 Standard components Self-co
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226 Rump kernel calls, as expected,
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228 Traditional FFS We measure the
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230 80 70 60 seconds 50 40 30 20 10
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232 The results are presented in Fi
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234 behavior is required by the act
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236
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238 Rialto [29] is an operating sys
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240 One argument for partitioned op
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242 View OS The View OS [37] approa
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244 OSKit Instead of making system
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246 discussing the type incompatibi
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248 difference to the abovementione
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250 At runtime, a rump kernel can a
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252 For testing and development we
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254
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256 Art of Virtualization. In: Proc
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258 [30] Adam Dunkels. 2001. Design
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260 [47] Galen C. Hunt and James R.
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262 [67] Steven McCanne and Van Jac
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264 [87] NetBSD Project. URL http:/
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266 of the 6th Workshop on Programm
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268
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A-2 RUMP.DHCPCLIENT(1) NetBSD Gener
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A-4 RUMP.HALT(1) NetBSD General Com
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A-6 RUMP_SERVER(1) NetBSD General C
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A-8 RUMP_SERVER(1) NetBSD General C
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A-10 SHMIF_DUMPBUS(1) NetBSD Genera
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A-12 P2K(3) NetBSD Library Function
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A-14 P2K(3) NetBSD Library Function
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A-16 RUMP(3) NetBSD Library Functio
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A-18 RUMP(3) NetBSD Library Functio
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A-20 RUMP_ETFS(3) NetBSD Library Fu
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A-22 RUMP_ETFS(3) NetBSD Library Fu
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A-24 RUMP_LWPROC(3) NetBSD Library
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A-26 RUMP_LWPROC(3) NetBSD Library
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A-28 RUMPCLIENT(3) NetBSD Library F
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A-30 RUMPCLIENT(3) NetBSD Library F
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A-32 RUMPHIJACK(3) NetBSD Library F
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A-38 UKFS(3) NetBSD Library Functio
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A-48 SHMIF(4) NetBSD Kernel Interfa
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A-50 RUMP_SP(7) NetBSD Miscellaneou
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A-52 RUMP_SP(7) NetBSD Miscellaneou
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B-2 TCP connections use standard TC
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B-4 rump clients. This means that j
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B-6 ponents. That can be done simpl
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B-8 Our goal is to add another part
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B-10 golem> export RUMP_SERVER=unix
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B-12 golem> rump.dd if=/dev/rcgd0d
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B-14 demogorgon# cgdconfig cgd0 /de
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B-16 rump_server -lrumpnet -lrumpne
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B-18 golem> rump.ifconfig virt0 cre
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B-20 Congratulations, that’s it.
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B-22 purely in userspace, it does n
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B-24 We then proceed to create a mo
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B-26 Then, the only thing left is t
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B-28 -d key=/dk,hostpath=${NFSX}/ff
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B-30 configuration. golem> sh rumpn
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B-32
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C-2 This is a quick fix for making
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C-4 This fixes the conditionally co
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Aalto-DD 171/2012 9HSTFMG*aejbgi+ I
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