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Diffstat (limited to 'en/devices/architecture')
| -rw-r--r-- | en/devices/architecture/hidl/services.html | 17 |
1 files changed, 9 insertions, 8 deletions
diff --git a/en/devices/architecture/hidl/services.html b/en/devices/architecture/hidl/services.html index c7ddd8f6..f441c8e2 100644 --- a/en/devices/architecture/hidl/services.html +++ b/en/devices/architecture/hidl/services.html @@ -168,14 +168,15 @@ or <code>oneway</code>. For an example, see "Asynchronous callbacks" in <code>inout</code> parameters.</p> <h3 id=limits>Per-transaction limits</h3> -<p>Per-transaction limits may be imposed on the amount of data sent in HIDL -methods and callbacks. The limits are yet to be determined but may be as small -as 4K. Calls exceeding these limits return failure immediately. Another -limitation is the resources available to the HIDL infrastructure to handle -multiple simultaneous transactions. Multiple transactions can be in-flight -simultaneously due to multiple threads or processes sending calls to a process -or multiple <code>oneway</code> calls that are not handled quickly by the -receiving process.</p> +<p>Per-transaction limits are not imposed on the amount of data sent in HIDL +methods and callbacks. However, calls exceeding 4KB per transaction are +considered excessive. If this is seen, re-architecting the given HIDL interface +is recommended. Another limitation is the resources available to the HIDL +infrastructure to handle multiple simultaneous transactions. Multiple +transactions can be in-flight simultaneously due to multiple threads or +processes sending calls to a process or multiple <code>oneway</code> calls that +are not handled quickly by the receiving process. The maximum total space +available for all concurrent transactions is 1MB by default.</p> <p>In a well-designed interface, exceeding these resource limitations should not happen; if it does, the call which exceeded them may either block until |