One - The Linux Kernel Archives

More documents

Recommendations

Info

266 • Linux Symposium 2004 • Volume One ity, high availability and performance. In carrier grade systems, thousands of requests must be handled concurrently without affecting the overall system’s performance, even under extremely high loads. Subscribers can expect some latency time when issuing a request, but they are not willing to accept an unbounded response time. Such transactions are not handled instantaneously for many reasons, and it can take some milliseconds or seconds to reply. Waiting for an answer reduces applications abilities to handle other transactions. Many different solutions have been envisaged to improve Linux’s capabilities in this area using different types of software organization, such as multithreaded architectures, implementing efficient POSIX interfaces, or improving the scalability of existing kernel routines. One possible solution that is adequate for carrier grade servers is the Asynchronous Event Mechanism (AEM), which provides asynchronous execution of processes in the Linux kernel. AEM implements a native support for asynchronous events in the Linux kernel and aims to bring carrier-grade characteristics to Linux in areas of scalability and soft realtime responsiveness. In addition, AEM offers event-based development framework, scalability, flexibility, and extensibility. Ericsson [5] released AEM to Open Source in February 2003 under the GPL license. AEM was announced on the Linux Kernel Mailing List (LKML) [20], and received feedback that resulted in some changes to the design and implementation. AEM is not yet integrated with the Linux kernel. 12 Conclusion There are many challenges accompanying the migration from proprietary to open platforms. The main challenge remains to be the availability of the various kernel features and mechanisms needed for telecom platforms and integrating these features in the Linux kernel. References [1] PCI Industrial Computer Manufacturers Group, http://www.picmg.org [2] Open Source Development Labs, http://www.osdl.org [3] Carrier Grade Linux, http://osdl.org/lab_activities [4] Service Availability Forum, http://www.saforum.org [5] Open System Lab, http://www.linux.ericsson.ca [6] Transparent IPC, http://tipc.sf.net [7] Asynchronous Event Mechanism, http://aem.sf.net [8] Distributed Security Infrastructure, http://disec.sf.net [9] MontaVista Carrier Grade Edition, http://www.mvista.com/cge [10] Make Clustering Easy with TIPC, LinuxWorld Magazine, April 2004 [11] IETF ForCES working group, http://www.sstanamera.com/~forces [12] Linux Virtual Routing and Forwarding project, http://linux-vrf.sf.net [13] Stop Malicious Code Execution at Kernel Level, LinuxWorld Magazine, January 2004
Linux Symposium 2004 • Volume One • 267 [14] Tripwire, http://www.tripwire.com [15] Bsign, http://packages.debian.org/bsign [16] Cryptomark, http://immunix.org/cryptomark.html [17] GnuPG, http://www.gnupg.org [18] DigSig announcement on LKML, http://lwn.net/Articles/51007 [19] An Event Mechanism for Linux, Linux Journal, July 2003 [20] AEM announcement on LKML, http://lwn.net/Articles/45633 Acknowledgments Thank you to Ludovic Beliveau, Mathieu Giguere, Magnus Karlson, Jon Maloy, Mats Naslund, Makan Pourzandi, and Frederic Rossi, for their valuable contributions and reviews.
Page 1:
Proceedings of the Linux Symposium
Page 4 and 5:
The State of ACPI in the Linux Kern
Page 7 and 8:
Conference Organizers Andrew J. Hut
Page 9 and 10:
TCP Connection Passing Werner Almes
Page 11 and 12:
Linux Symposium 2004 • Volume One
Page 13 and 14:
Page 15 and 16:
Page 17 and 18:
Page 19 and 20:
Page 21 and 22:
Page 23 and 24:
Cooperative Linux Dan Aloni da-x@co
Page 25 and 26:
Page 27 and 28:
Page 29 and 30:
Page 31 and 32:
Page 33 and 34:
Build your own Wireless Access Poin
Page 35 and 36:
Page 37 and 38:
Page 39 and 40:
Page 41 and 42:
Run-time testing of LSB Application
Page 43 and 44:
Page 45 and 46:
Page 47 and 48:
Page 49 and 50:
Page 51 and 52:
Linux Block IO—present and future
Page 53 and 54:
Page 55 and 56:
Page 57 and 58:
Page 59 and 60:
Page 61 and 62:
Page 63 and 64:
Linux AIO Performance and Robustnes
Page 65 and 66:
Page 67 and 68:
Page 69 and 70:
Page 71 and 72:
Page 73 and 74:
Page 75 and 76:
Page 77 and 78:
Page 79 and 80:
Methods to Improve Bootup Time in L
Page 81 and 82:
Page 83 and 84:
Page 85 and 86:
Page 87 and 88:
Page 89 and 90:
Linux on NUMA Systems Martin J. Bli
Page 91 and 92:
Page 93 and 94:
Page 95 and 96:
Page 97 and 98:
Page 99 and 100:
Page 101 and 102:
Page 103 and 104:
Improving Kernel Performance by Unm
Page 105 and 106:
Page 107 and 108:
Page 109 and 110:
Page 111 and 112:
Page 113 and 114:
Linux Virtualization on IBM POWER5
Page 115 and 116:
Page 117 and 118:
Page 119 and 120:
Page 121 and 122:
The State of ACPI in the Linux Kern
Page 123 and 124:
Page 125 and 126:
Page 127 and 128:
Page 129 and 130:
Page 131 and 132:
Page 133 and 134:
Scaling Linux® to the Extreme From
Page 135 and 136:
Page 137 and 138:
Page 139 and 140:
Page 141 and 142:
Page 143 and 144:
Page 145 and 146:
Page 147 and 148:
Page 149 and 150:
Get More Device Drivers out of the
Page 151 and 152:
Page 153 and 154:
Page 155 and 156:
Page 157 and 158:
Page 159 and 160:
Page 161 and 162:
Page 163 and 164:
Big Servers—2.6 compared to 2.4 W
Page 165 and 166:
Page 167 and 168:
Multi-processor and Frequency Scali
Page 169 and 170:
Page 171 and 172:
Page 173 and 174:
Page 175 and 176:
Page 177 and 178:
Page 179 and 180:
Page 181 and 182:
Page 183 and 184:
Page 185 and 186:
Page 187 and 188:
Dynamic Kernel Module Support: From
Page 189 and 190:
Page 191 and 192:
Page 193 and 194:
Page 195 and 196:
Page 197 and 198:
Page 199 and 200:
Page 201 and 202:
Page 203 and 204:
e100 Weight Reduction Program Writi
Page 205 and 206:
Page 207 and 208:
NFSv4 and rpcsec_gss for linux J. B
Page 209 and 210:
Page 211 and 212:
Page 213 and 214:
Page 215 and 216: Comparing and Evaluating epoll, sel
Page 217 and 218: Linux Symposium 2004 • Volume One
Page 227 and 228: The (Re)Architecture of the X Windo
Page 239 and 240: IA64-Linux perf tools for IO dorks
Page 255 and 256: Carrier Grade Server Features in th
Page 265: Linux Symposium 2004 • Volume One
Page 269 and 270: Demands, Solutions, and Improvement
Page 287 and 288: Hotplug Memory and the Linux VM Dav
show all

One - The Linux Kernel Archives

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?