The Design and Implementation of the Anykernel and Rump Kernels

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156 USB Host Controller Hub0 (root) Hub1 (uhub) Hub2 (ugen) mouse keyboard umass Hub3 ??? Figure 3.27: Attaching USB Hubs. In case a USB hub is attached by the host kernel as ugen instead of as a hub, devices tree behind the hub will not be visible. host probe: ugen2 at uhub1 port 1 ugen2: OnSpec Generic USB Hub rump kernel probe: ugenhc2 at mainbus0 usb2 at ugenhc2: USB revision 2.0 uhub2 at usb2 uhub2: 1 port with 1 removable uhub3 at uhub2 port 1: OnSpec Inc. uhub3: 2 ports with 0 removable uhub4 at uhub3 port 1: OnSpec Inc. uhub5 at uhub3 port 2: OnSpec Inc. Figure 3.28: USB device probe without host HUBs.
157 host probe: uhub5 at uhub2 port 1: OnSpec Generic Hub uhub5: 2 ports with 0 removable ugen2 at uhub5 port 1 ugen2: Alcor Micro FD7in1 ugen3 at uhub5 port 2 ugen3: CITIZEN X1DE-USB rump kernel probe: ugenhc2 at mainbus0 usb2 at ugenhc2: USB revision 2.0 uhub2 at usb2 umass0 at uhub2 umass0: Alcor Micro umass0: using SCSI over Bulk-Only scsibus0 at umass0 sd0 at scsibus0 sd0: 93696 KB, 91 cyl, 64 head, 32 sec, 512 bytes/sect x 187392 sectors sd1 at scsibus0 sd1: drive offline ugenhc3 at mainbus0 usb3 at ugenhc3: USB revision 2.0 uhub3 at usb3 umass1 at uhub3 umass1: using UFI over CBI with CCI atapibus0 at umass1 sd2 at atapibus0 drive 0 sd2: 1440 KB, 80 cyl, 2 head, 18 sec, 512 bytes/sect x 2880 sectors Figure 3.29: USB device probe with host HUBs. The devices behind the hub are visible.
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Department of Computer Science and
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9 Preface Meet the new boss Same as
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11 Then there is my dear Xi, who, s
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14 2.3.3 InterruptsandPreemption...
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16 4.1.1 Implementation Effort ....
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18 Appendix C Patches to the 5.99.4
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20 ISA LGPL LRU LWP MD MI MMU NIC O
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23 List of Figures 2.1 Rumpkernelhi
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25 4.14 Time to execute 5M system c
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29 1 Introduction In its classic ro
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31 and application-level drivers. T
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33 We define an anykernel to be an
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35 Our implementation supports rump
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37 The project was done in small in
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39 2 The Anykernel and Rump Kernels
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41 building on top of the entities
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43 Drivers in a rump kernel remain
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45 Figure 2.1: Rump k
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47 in Section 3.2.3. Whenever discu
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49 int rumpns_bpfopen(dev_t, int, i
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51 Figure 2.4:
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53 while the application logic stil
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55 We must solve the lack of a rump
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57 2.3.1 Kernel threads Up until no
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59 void * pool_cache_get_paddr(pool
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61 2.3.4 An Example We present an e
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63 Figure 2.6: Prov
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65 The straightforward use of exist
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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
Page 108 and 109: 106 synchronization part of the alg
Page 110 and 111: 108 /* * Run a cross call to cycle
Page 112 and 113: 110 kernel needs to do is make sure
Page 114 and 115: 112 The kernel with uniprocessor lo
Page 116 and 117: 114 the header file while open() c
Page 118 and 119: 116 The same wrapper works both for
Page 120 and 121: 118 5. Some calling conventions (e.
Page 122 and 123: 120 int rump_pub_lwproc_rfork(int a
Page 124 and 125: 122 By convention, file system devi
Page 126 and 127: 124 ule directory tree from /stand
Page 128 and 129: 126 After these steps have been per
Page 130 and 131: 128 Host Dynamic Linker Using the h
Page 132 and 133: 130 for (i = 0; i < SYS_NSYSENT; i+
Page 134 and 135: 132 into a rump kernel and the driv
Page 136 and 137: 134 sys/arch/x86/include/cpu.h: #de
Page 138 and 139: 136 3.8.4 Rump Component Init Routi
Page 140 and 141: 138 RUMP_COMPONENT(RUMP_COMPONENT_N
Page 142 and 143: 140 We have three distinct cases we
Page 144 and 145: 142 # ifconfig tap0 create # ifconf
Page 146 and 147: 144 Unprivileged use of host’s ne
Page 148 and 149: 146 DOMAIN_DEFINE(sockindomain); co
Page 150 and 151: 148 issue another write before the
Page 152 and 153: 150 using an interface called USBDI
Page 154 and 155: 152 The kernel device configuration
Page 156 and 157: 154 # $NetBSD: UMASS.ioconf,v 1.4 2
Page 160 and 161: 158 Figure 3.30: File s
Page 162 and 163: 160 in-kernel mount: /dev/sd0e /m/u
Page 164 and 165: 162 structure being created by rump
Page 166 and 167: 164 3.12.1 Client-Kernel Locators B
Page 168 and 169: 166 A tmpfs server listening on INA
Page 170 and 171: 168 Request Arguments Response Desc
Page 172 and 173: 170 Host syscall rump syscall 1. op
Page 174 and 175: 172 A client’s initial connection
Page 176 and 177: 174 their system calls to a rump ke
Page 178 and 179: 176 stdin/stdout, the new file desc
Page 180 and 181: 178 Supporting fork() Recall, the f
Page 182 and 183: 180 As with fork, most of the kerne
Page 184 and 185: 182 Anecdotal analysis For several
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Page 188 and 189: 186 SLOC 8000 7000 6000 5000 4000 3
Page 190 and 191: 188 Total commits to the kernel 9,6
Page 192 and 193: 190 120 build time (minutes) 100 80
Page 194 and 195: 192 4.2.2 makefs For a source tree
Page 196 and 197: 194 not include later debugging [76
Page 198 and 199: 196 the necessary tools such as mak
Page 200 and 201: 198 proach of supplying alternate c
Page 202 and 203: 200 are not out-of-the-box compatib
Page 204 and 205: 202 golem> mount -t msdos -o rump /
Page 206 and 207: 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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