Recherche avancée
Autres articles (14)
-
Submit bugs and patches
13 avril 2011Unfortunately a software is never perfect.
If you think you have found a bug, report it using our ticket system. Please to help us to fix it by providing the following information : the browser you are using, including the exact version as precise an explanation as possible of the problem if possible, the steps taken resulting in the problem a link to the site / page in question
If you think you have solved the bug, fill in a ticket and attach to it a corrective patch.
You may also (...) -
Publier sur MédiaSpip
13 juin 2013Puis-je poster des contenus à partir d’une tablette Ipad ?
Oui, si votre Médiaspip installé est à la version 0.2 ou supérieure. Contacter au besoin l’administrateur de votre MédiaSpip pour le savoir -
MediaSPIP Player : problèmes potentiels
22 février 2011, parLe lecteur ne fonctionne pas sur Internet Explorer
Sur Internet Explorer (8 et 7 au moins), le plugin utilise le lecteur Flash flowplayer pour lire vidéos et son. Si le lecteur ne semble pas fonctionner, cela peut venir de la configuration du mod_deflate d’Apache.
Si dans la configuration de ce module Apache vous avez une ligne qui ressemble à la suivante, essayez de la supprimer ou de la commenter pour voir si le lecteur fonctionne correctement : /** * GeSHi (C) 2004 - 2007 Nigel McNie, (...)
Sur d’autres sites (4039)
-
Evolution #3849 : Affiner/retirer les disallow de robots.txt qui empêchent les sites SPIP de se ré...
28 octobre 2016, par Spipmalion DupondMerci pour ta réponse
Effectivement, je viens d’activer la compression et cela va régler la plupart des problèmes d’accès par GoogleC’est quand même embêtant pour les sites qui n’activent pas la compression puisqu’elle n’est pas obligatoire, et aussi la compression ne compresse pas 100% des fichiers chez moi : http://forum.spip.net/fr_265551.html
-
Cortex-A7 instruction cycle timings
15 mai 2014, par Mans — ARMThe Cortex-A7 ARM core is a popular choice in low-power and low-cost designs. Unfortunately, the public TRM does not include instruction timing information. It does reveal that execution is in-order which makes measuring the throughput and latency for individual instructions relatively straight-forward.
The table below lists the measured issue cycles (inverse throughput) and result latency of some commonly used instructions.
It should be noted that in some cases, the perceived latency depends on the instruction consuming the result. Most of the values were measured with the result used as input to the same instruction. For instructions with multiple outputs, the latencies of the result registers may also differ.
Finally, although instruction issue is in-order, completion is out of order, allowing independent instructions to issue and complete unimpeded while a multi-cycle instruction is executing in another unit. For example, a 3-cycle MUL instruction does not block ADD instructions following it in program order.
ALU instructions Issue cycles Result latency MOV Rd, Rm 1/2 1 ADD Rd, Rn, #imm 1/2 1 ADD Rd, Rn, Rm 1 1 ADD Rd, Rn, Rm, LSL #imm 1 1 ADD Rd, Rn, Rm, LSL Rs 1 1 LSL Rd, Rn, #imm 1 2 LSL Rd, Rn, Rs 1 2 QADD Rd, Rn, Rm 1 2 QADD8 Rd, Rn, Rm 1 2 QADD16 Rd, Rn, Rm 1 2 CLZ Rd, Rm 1 1 RBIT Rd, Rm 1 2 REV Rd, Rm 1 2 SBFX Rd, Rn 1 2 BFC Rd, #lsb, #width 1 2 BFI Rd, Rn, #lsb, #width 1 2 NOTE : Shifted operands and shift amounts needed one cycle early. Multiply instructions Issue cycles Result latency MUL Rd, Rn, Rm 1 3 MLA Rd, Rn, Rm, Ra 1 31 SMULL Rd, RdHi, Rn, Rm 1 3 SMLAL Rd, RdHi, Rn, Rm 1 31 SMMUL Rd, Rn, Rm 1 3 SMMLA Rd, Rn, Rm, Ra 1 31 SMULBB Rd, Rn, Rm 1 3 SMLABB Rd, Rn, Rm, Ra 1 31 SMULWB Rd, Rn, Rm 1 3 SMLAWB Rd, Rn, Rm, Ra 1 31 SMUAD Rd, Rn, Rm 1 3 1 Accumulator forwarding allows back to back MLA instructions without delay. Divide instructions Issue cycles Result latency SDIV Rd, Rn, Rm 4-20 6-22 UDIV Rd, Rn, Rm 3-19 5-21 Load/store instructions Issue cycles Result latency LDR Rt, [Rn] 1 3 LDR Rt, [Rn, #imm] 1 3 LDR Rt, [Rn, Rm] 1 3 LDR Rt, [Rn, Rm, lsl #imm] 1 3 LDRD Rt, Rt2, [Rn] 1 3-4 LDM Rn, regs 1-8 3-10 STR Rt, [Rn] 1 2 STRD Rt, Rt2, [Rn] 1 2 STM Rn, regs 1-10 2-12 NOTE : Load results are forwarded to dependent stores without delay. VFP instructions Issue cycles Result latency VMOV.F32 Sd, Sm 1 4 VMOV.F64 Dd, Dm 1 4 VNEG.F32 Sd, Sm 1 4 VNEG.F64 Dd, Dm 1 4 VABS.F32 Sd, Sm 1 4 VABS.F64 Dd, Dm 1 4 VADD.F32 Sd, Sn, Sm 1 4 VADD.F64 Dd, Dn, Dm 1 4 VMUL.F32 Sd, Sn, Sm 1 4 VMUL.F64 Dd, Dn, Dm 4 7 VMLA.F32 Sd, Sn, Sm 1 81 VMLA.F64 Dd, Dn, Dm 4 112 VFMA.F32 Sd, Sn, Sm 1 81 VFMA.F64 Dd, Dn, Dm 5 82 VDIV.F32 Sd, Sn, Sm 15 18 VDIV.F64 Dd, Dn, Dm 29 32 VSQRT.F32 Sd, Sm 14 17 VSQRT.F64 Dd, Dm 28 31 VCVT.F32.F64 Sd, Dm 1 4 VCVT.F64.F32 Dd, Sm 1 4 VCVT.F32.S32 Sd, Sm 1 4 VCVT.F64.S32 Dd, Sm 1 4 VCVT.S32.F32 Sd, Sm 1 4 VCVT.S32.F64 Sd, Dm 1 4 VCVT.F32.S32 Sd, Sd, #fbits 1 4 VCVT.F64.S32 Dd, Dd, #fbits 1 4 VCVT.S32.F32 Sd, Sd, #fbits 1 4 VCVT.S32.F64 Dd, Dd, #fbits 1 4 1 5 cycles with dependency only on accumulator.
2 8 cycles with dependency only on accumulator.NEON integer instructions Issue cycles Result latency VADD.I8 Dd, Dn, Dm 1 4 VADDL.S8 Qd, Dn, Dm 2 4 VADD.I8 Qd, Qn, Qm 2 4 VMUL.I8 Dd, Dn, Dm 2 4 VMULL.S8 Qd, Dn, Dm 2 4 VMUL.I8 Qd, Qn, Qm 4 4 VMLA.I8 Dd, Dn, Dm 2 4 VMLAL.S8 Qd, Dn, Dm 2 4 VMLA.I8 Qd, Qn, Qm 4 4 VADD.I16 Dd, Dn, Dm 1 4 VADDL.S16 Qd, Dn, Dm 2 4 VADD.I16 Qd, Qn, Qm 2 4 VMUL.I16 Dd, Dn, Dm 1 4 VMULL.S16 Qd, Dn, Dm 2 4 VMUL.I16 Qd, Qn, Qm 2 4 VMLA.I16 Dd, Dn, Dm 1 4 VMLAL.S16 Qd, Dn, Dm 2 4 VMLA.I16 Qd, Qn, Qm 2 4 VADD.I32 Dd, Dn, Dm 1 4 VADDL.S32 Qd, Dn, Dm 2 4 VADD.I32 Qd, Qn, Qm 2 4 VMUL.I32 Dd, Dn, Dm 2 4 VMULL.S32 Qd, Dn, Dm 2 4 VMUL.I32 Qd, Qn, Qm 4 4 VMLA.I32 Dd, Dn, Dm 2 4 VMLAL.S32 Qd, Dn, Dm 2 4 VMLA.I32 Qd, Qn, Qm 4 4 NEON floating-point instructions Issue cycles Result latency VADD.F32 Dd, Dn, Dm 2 4 VADD.F32 Qd, Qn, Qm 4 4 VMUL.F32 Dd, Dn, Dm 2 4 VMUL.F32 Qd, Qn, Qm 4 4 VMLA.F32 Dd, Dn, Dm 2 81 VMLA.F32 Qd, Qn, Qm 4 81 1 5 cycles with dependency only on accumulator. NEON permute instructions Issue cycles Result latency VEXT.n Dd, Dn, Dm, #imm 1 4 VEXT.n Qd, Qn, Qm, #imm 2 5 VTRN.n Dd, Dn, Dm 2 5 VTRN.n Qd, Qn, Qm 4 5 VUZP.n Dd, Dn, Dm 2 5 VUZP.n Qd, Qn, Qm 4 6 VZIP.n Dd, Dn, Dm 2 5 VZIP.n Qd, Qn, Qm 4 6 VTBL.8 Dd, Dn, Dm 1 4 VTBL.8 Dd, Dn-Dn+1, Dm 1 4 VTBL.8 Dd, Dn-Dn+2, Dm 2 5 VTBL.8 Dd, Dn-Dn+3, Dm 2 5 -
Thinking about switching to GeoIP2 for better location detection ? Here’s what you should know
5 juin 2018, par Matomo Core TeamIn Matomo 3.5.0 we added a new feature to improve the location detection (country, region, city) of your visitors. Especially when it comes to IPv6 addresses, you will see less “Unknown” locations and more accurate results in general. This feature is now enabled for all new installations but needs to be manually enabled for existing Matomo self-hosted users.
Why is the Matomo plugin not enabled for existing users ?
When you enable the GeoIP2 plugin, a database update will need to be executed on two datatable tables (“log_visit” and “log_conversion”) which stores some of the raw data. Please be aware that this update could take several hours depending on the size of your database.
If you store many visits in your database, it is recommended to execute the update through the command line by executing the command
./console core:updateto avoid the update from timing out. You may also have to put your Matomo into maintenance mode during this time and replay the missed traffic from logs afterwards as explained in the FAQ article.GeoIP2 may slow down your tracking
In the past we have seen that a few Matomo databases with high traffic volumes struggle to handle all the tracking requests after enabling GeoIP2. The reason for this is the location database now contains many more entries because it has to store all the IPv6 addresses and the database itself has a different format. Hence, the location lookup takes longer.
It is hard to say how much slower the location lookup gets, but we found GeoIP2-PHP is about 20 times slower than GeoIP1-PHP. On a fast CPU the lookup time for an IP with GeoIP2 takes about 1ms, but can also take much longer depending on the server.
Making location lookups fast again
There is a PHP extension available that makes lookups very fast, even faster than the old GeoIP1-PHP provider. If you can install additional PHP extensions on your server and have a high traffic website, you may want to install the GeoIP2 extension.
There is also an Nginx module and an Apache module. Unfortunately, we don’t have any performance metrics for these providers.
How do I activate the GeoIP2 location provider ?
As a Super User, log in to your Matomo and go to “Administration => Plugins”. There you can activate the “GeoIP2” plugin. As mentioned, this will trigger a database update which can take a while and you may want to perform this update through the command line.
Now you can go to “Administration => Geolocation”. Here you will first need to install the GeoIP2 databases at the bottom of the page before you can activate the GeoIP2-PHP provider. To activate any of the other GeoIP2 providers, you will need to install the required modules.
You will be able to check if the detection works on the right next to location provider. Once you selected one of the available providers, you’re all good to go.
The post Thinking about switching to GeoIP2 for better location detection ? Here’s what you should know appeared first on Analytics Platform - Matomo.
Syndiquer tout le site
