Commit Graph

7682 Commits

Author SHA1 Message Date
Tomasz Kulasek
884ed3ff8e app/crypto-perf: fix uninitialized values for null ops
Some values are uninitialized for "cipher null" and "auth null"
operations. It may cause unpredictable results for some crypto pmd
drivers, or even segmentation fault.

This patch sets values for null operations to zero.

Fixes: f8be1786b1 ("app/crypto-perf: introduce performance test application")

Signed-off-by: Tomasz Kulasek <tomaszx.kulasek@intel.com>
Acked-by: Pablo de Lara <pablo.de.lara.guarch@intel.com>
2017-04-06 00:17:44 +02:00
Daniel Mrzyglod
5e66937631 app/crypto-perf: avoid wrong operation type for AEAD algos
When somebody use bad --optype with aead algorithms
segmentation fault could happen.

Fixes: f8be1786b1 ("app/crypto-perf: introduce performance test application")

Signed-off-by: Daniel Mrzyglod <danielx.t.mrzyglod@intel.com>
Acked-by: Pablo de Lara <pablo.de.lara.guarch@intel.com>
2017-04-06 00:17:44 +02:00
Slawomir Mrozowicz
5d75fb09d3 app/crypto-perf: fix invalid latency for QAT
Fixes invalid latency result when using the performance application and
hardware QAT PMD. It occurred when the number of processed packets was
higher then the size of the internal QAT PMD ring buffer and the buffer
was overflowed.
Fixed by correcting the registration of the enqueued packets and freeing
memory space for not enqueued packets.

Fixes: f8be1786b1 ("app/crypto-perf: introduce performance test application")

Signed-off-by: Slawomir Mrozowicz <slawomirx.mrozowicz@intel.com>
Acked-by: Pablo de Lara <pablo.de.lara.guarch@intel.com>
2017-04-06 00:17:44 +02:00
Pablo de Lara
7c085e85c2 cryptodev: enable BPI for Cablelabs DOCSIS security spec
Extend the DPDK cryptodev API to enable processing of packets according
to the Baseline Privacy Interface Plus (BPI+) Specification described in
the security specification of the Cablelabs Data-over-Cable Service
Interface Specification (DOCSIS).

Brief summary of BPI+ symmetric cryptography requirements:
BPI+ cryptography uses a block cipher (AES-CBC/DES-CBC) to encrypt/decrypt
all the whole blocks in the packet. However the data length is not always
a block-multiple, so where there is a final block less than the full block
size this residual block requires special handling using AES-CFB/DES-CFB
mode. Similar special handling is specified where there is only one block,
smaller than the block size for the cipher. See spec for further details.
https://apps.cablelabs.com/specification/docsis-3-1-security-specification/

Two new elements are added to the enum rte_crypto_cipher_algorithm.
Note elements of this enum are actually a combination of an algorithm (AES,
3DES, etc) and mode (CBC, CTR, etc). The new DOCSISBPI mode is used to
convey to the PMD that the mode applied should be the specific combination
of CBC and CFB required by the DOCSIS Baseline Privacy Plus Spec.

Signed-off-by: Fiona Trahe <fiona.trahe@intel.com>
Signed-off-by: Pablo de Lara <pablo.de.lara.guarch@intel.com>
Acked-by: Deepak Kumar Jain <deepak.k.jain@intel.com>
2017-04-06 00:17:44 +02:00
Pablo de Lara
4790f99d2d examples/l2fwd-crypto: use cryptodev algorithm parser
L2fwd-crypto app was creating an array of strings for the
supported algorithms, which was different from the strings
that are now in cryptodev.

Use the new API in cryptodev to parse the string from the user,
to get the algorithm enum, instead, so it is not necessary to add
a new supported algorithm in the cryptodev library and this app.

Signed-off-by: Pablo de Lara <pablo.de.lara.guarch@intel.com>
Acked-by: Fiona Trahe <fiona.trahe@intel.com>
Acked-by: Hemant Agrawal <hemant.agrawal@nxp.com>
2017-04-06 00:17:44 +02:00
Pablo de Lara
66be27121c app/crypto-perf: use cryptodev algorithm parser
Instead of going through the array of supported algorithms
in the app, to get the algorithm enum, use the new API in
cryptodev to parse this string, so it is not necessary to add
a new supported algorithm in the cryptodev library and this app.

Signed-off-by: Pablo de Lara <pablo.de.lara.guarch@intel.com>
Acked-by: Fiona Trahe <fiona.trahe@intel.com>
Acked-by: Hemant Agrawal <hemant.agrawal@nxp.com>
2017-04-06 00:17:44 +02:00
Pablo de Lara
afe6050060 cryptodev: add algorithm string parsers
Adds functions to get the cipher/authentication
algorithm enums, given a string. This is useful for applications
which gets the algorithm required from the user, to have a common
string-enum mapping.

Signed-off-by: Pablo de Lara <pablo.de.lara.guarch@intel.com>
Acked-by: Fiona Trahe <fiona.trahe@intel.com>
Acked-by: Hemant Agrawal <hemant.agrawal@nxp.com>
2017-04-06 00:17:44 +02:00
Pablo de Lara
e26690f4fc cryptodev: add missing algorithm strings
DES-CBC and AUTH NULL algorithms were missing in
the array of algorithm strings.

Signed-off-by: Pablo de Lara <pablo.de.lara.guarch@intel.com>
Acked-by: Fiona Trahe <fiona.trahe@intel.com>
Acked-by: Hemant Agrawal <hemant.agrawal@nxp.com>
2017-04-06 00:17:44 +02:00
Olivier Matz
56086e9729 test/eventdev: fix build with crypto disabled
There is a compilation error in the following case:

  make config T=x86_64-native-linuxapp-gcc
  sed -i 's,CONFIG_RTE_LIBRTE_CRYPTODEV=y,CONFIG_RTE_LIBRTE_CRYPTODEV=n,' \
    build/.config
  sed -i 's,CONFIG_RTE_APP_CRYPTO_PERF=y,CONFIG_RTE_APP_CRYPTO_PERF=n,' \
    build/.config
  make -j4
  make -j4 test-build

  test_eventdev.c:39:27: fatal error:
  rte_cryptodev.h: No such file or directory
  #include <rte_cryptodev.h>
                           ^

Removing the include induces a new error, (missing declaration of
rte_eal_vdev_init()), which is fixed by including rte_dev.h.

Fixes: f8f9d233ea ("test/eventdev: add unit tests")

Signed-off-by: Olivier Matz <olivier.matz@6wind.com>
Acked-by: Jerin Jacob <jerin.jacob@caviumnetworks.com>
2017-04-06 17:55:54 +02:00
Ed Czeck
65d9e621fa ring: fix C++ cast error
build error:
include/rte_ring.h:459:22: error: invalid conversion from ‘void*’
to ‘void**’ [-fpermissive]
  ENQUEUE_PTRS(r, &r[1], prod_head, obj_table, n, void *);

Implicit casts of void* to void** are considered warnings in some
compilers.  E.g. g++ version 5.8.  Cast directly to object types

Fixes: a6619414 ("ring: make struct and macros type agnostic")

Signed-off-by: Ed Czeck <ed.czeck@atomicrules.com>
Acked-by: Olivier Matz <olivier.matz@6wind.com>
2017-04-06 17:55:54 +02:00
Olivier Matz
ab338eb44e mk: fix lib filtering when linking app
I get the following error when linking the test application:
  build/lib/librte_pmd_thunderx_nicvf.a(nicvf_hw.o):
  In function `nicvf_qsize_regbit':
  drivers/net/thunderx/base/nicvf_hw.c:451: undefined reference to `log2'
  build/lib/librte_pmd_thunderx_nicvf.a(nicvf_hw.o):
  In function `nicvf_rss_reta_update':
  drivers/net/thunderx/base/nicvf_hw.c:804: undefined reference to `log2'
  build/lib/librte_pmd_thunderx_nicvf.a(nicvf_hw.o):
  In function `nicvf_rss_reta_query':
  drivers/net/thunderx/base/nicvf_hw.c:825: undefined reference to `log2'

While I don't know why it does not happen for a default build, the error
can be explained. The link command line is:

   gcc -o test ... *.o ... -Wl,-lm ... -Wl,-lrte_pmd_thunderx_nicvf ...

rte_pmd_thunderx_nicvf needs the math library, and it should be
added after. This is not the case because the test application also
adds the math library.

The makefile already filters the libraries, but it keeps the first
occurrence of the lib. Instead, the last one should be kept.

Fixes: edf4d331dc ("mk: eliminate duplicates from libraries list")
Cc: stable@dpdk.org

Signed-off-by: Olivier Matz <olivier.matz@6wind.com>
Acked-by: Thomas Monjalon <thomas.monjalon@6wind.com>
2017-04-06 16:50:17 +02:00
Olivier Matz
e629b8dbd9 mk: fix shell errors when building with clang
On my system, the version of the compiler is not properly retrieved,
resulting in strange logs when building the dpdk:
  /bin/sh: line 0: test: too many arguments

This happens when mk/toolchain/clang/rte.toolchain-compat.mk is included
from a directory that use gcc to build (ex: kernel modules). In that
case, the CLANG_VERSION variable contains spaces that breaks some shell
calls to the test program.

The error is because the output of "gcc -v" on my system contains 2 lines
that matches the "version" string:

  Configured with: ../src/configure -v \
    --with-pkgversion='Debian 6.3.0-6' [...]
  gcc version 6.3.0 20170205 (Debian 6.3.0-6)

This may be specific to Debian. Fix it by specializing the grep.

Fixes: 2ef6eea891 ("mk: add clang toolchain")
Cc: stable@dpdk.org

Signed-off-by: Olivier Matz <olivier.matz@6wind.com>
Acked-by: Thomas Monjalon <thomas.monjalon@6wind.com>
2017-04-06 16:50:17 +02:00
Thomas Monjalon
75206638ef mk: build examples list before each doxygen run
The file examples.dox was not re-generated when a file
is added or removed from examples/.
It is now removed on clean operation.
The ordering of operations (clean before generation) is also
better defined.

Signed-off-by: Thomas Monjalon <thomas.monjalon@6wind.com>
2017-04-06 16:29:32 +02:00
Pascal Mazon
947d949de7 net/tap: fix max queues redefinition
The macro RTE_PMD_TAP_MAX_QUEUES was defined twice.
On machines with kernel < 3.8, IFF_MULTI_QUEUE didn't exist, and thus
both definitions used different values.

Fixes: cf56436611 ("net/tap: move private elements to external header")

Signed-off-by: Pascal Mazon <pascal.mazon@6wind.com>
2017-04-06 16:29:32 +02:00
Nelio Laranjeiro
4e66a6fef3 net/mlx5: fix an uninitialized variable
Since patch "mbuf: structure reorganization" the compiler complains
sometimes (in some conditions):

 .../drivers/net/mlx5/mlx5_rxtx.c: In function ‘mlx5_rx_burst’:
 .../drivers/net/mlx5/mlx5_rxtx.c:2082:17: error: ‘len’ may be used
uninitialized in this function [-Werror=maybe-uninitialized]

len is not initialised as it will be at the first segment of a received
packet, but it remains hard for the compiler to determine it.

Fixes: 9964b965ad ("net/mlx5: re-add Rx scatter support")
Cc: stable@dpdk.org

Signed-off-by: Nelio Laranjeiro <nelio.laranjeiro@6wind.com>
Acked-by: Olivier Matz <olivier.matz@6wind.com>
2017-04-06 13:08:24 +02:00
Bruce Richardson
8b2928c978 ethdev: fix missing function in version map file
The function rte_eth_find_next is missing in the map file, which causes
errors with shared library builds.

  .../test-pmd/testpmd.c:1693: undefined reference to `rte_eth_find_next'

Adding function to map file fixes the issue.

Fixes: 5588909af2 ("ethdev: add device iterator")

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
2017-04-06 12:52:52 +02:00
Keith Wiles
793d3320e2 maintainers: handoff ownership of Tap PMD
Pascal has added many features to the Tap PMD and the code
is now mostly his code. We talked and he suggested I send
the patch to change ownership.

Signed-off-by: Keith Wiles <keith.wiles@intel.com>
Acked-by: Pascal Mazon <pascal.mazon@6wind.com>
2017-04-06 10:02:16 +02:00
Shrikrishna Khare
d3da3159fb maintainers: update for vmxnet3
Taking over DPDK vmxnet3 driver maintainer role.

Signed-off-by: Shrikrishna Khare <skhare@vmware.com>
Acked-by: Yong Wang <yongwang@vmware.com>
2017-04-06 10:02:16 +02:00
Jasvinder Singh
9c77b848b1 test: add CRC computation
This patch provides a set of tests for verifying the functional
correctness of 16-bit and 32-bit CRC APIs.

Signed-off-by: Jasvinder Singh <jasvinder.singh@intel.com>
Acked-by: Pablo de Lara <pablo.de.lara.guarch@intel.com>
2017-04-05 23:03:25 +02:00
Jasvinder Singh
986ff526fb net: add CRC computation API
APIs for selecting the architecure specific implementation and computing
the crc (16-bit and 32-bit CRCs) are added. For CRCs calculation, scalar
as well as x86 intrinsic(sse4.2) versions are implemented.

The scalar version is based on generic Look-Up Table(LUT) algorithm,
while x86 intrinsic version uses carry-less multiplication for
fast CRC computation.

Signed-off-by: Jasvinder Singh <jasvinder.singh@intel.com>
Acked-by: Pablo de Lara <pablo.de.lara.guarch@intel.com>
2017-04-05 23:03:23 +02:00
Gaetan Rivet
7d89b26103 app/testpmd: use ethdev iterator to list devices
This commit replaces redundant code with public ethdev layer calls.

Signed-off-by: Gaetan Rivet <gaetan.rivet@6wind.com>
2017-04-05 22:47:57 +02:00
Gaetan Rivet
5588909af2 ethdev: add device iterator
This iterator helps applications iterate over the device list and skip
holes caused by invalid or detached devices.

Signed-off-by: Gaetan Rivet <gaetan.rivet@6wind.com>
2017-04-05 22:47:57 +02:00
Gaetan Rivet
d52268a8b2 ethdev: expose device states
The hotplug API introduced multiple states for a device with possible
values defined internally, while the related field in struct rte_eth_dev
was made public.

Exposing those states improves consistency because applications have to
deal with the device list directly.

"DEV_DETACHED" is renamed "RTE_ETH_DEV_UNUSED" to better reflect that
the emptiness of a slot is not necessarily the result of detaching a
device.

Signed-off-by: Gaetan Rivet <gaetan.rivet@6wind.com>
2017-04-05 22:47:57 +02:00
Ferruh Yigit
fa865c012b event/sw: fix build with icc
build error:
.../drivers/event/sw/sw_evdev_scheduler.c(379):
error #300: const variable "dummy_rob" requires an initializer
        static const struct reorder_buffer_entry dummy_rob;
                                                          ^

Variable "dummy_rob" defined as const but already cast to another
pointer and its content updated. Remove const qualifier from variable.

Fixes: 617995dfc5 ("event/sw: add scheduling logic")

Signed-off-by: Ferruh Yigit <ferruh.yigit@intel.com>
2017-04-05 18:20:42 +02:00
Ferruh Yigit
a175e38f2e event/octeontx: fix build with icc
build error:
.../drivers/event/octeontx/ssovf_worker.c(212):
error #592: variable "get_work0" is used before its value is set
        RTE_SET_USED(get_work0);
        ^

.../drivers/event/octeontx/ssovf_worker.c(213):
error #592: variable "get_work1" is used before its value is set
        RTE_SET_USED(get_work1);
        ^
For x86 these variables set but not used, move macros below
where values assigned.

Fixes: f61808eaa9 ("event/octeontx: add start function")

Signed-off-by: Ferruh Yigit <ferruh.yigit@intel.com>
2017-04-05 18:20:42 +02:00
Ferruh Yigit
3061d0d961 ring: fix build with icc
build error:
In file included from .../lib/librte_ring/rte_ring.c(90):
.../lib/librte_ring/rte_ring.h(162):
error #1366: a reduction in alignment without the "packed" attribute
is ignored
  } __rte_cache_aligned;
      ^

Alignment attribute moved to first element of the struct

Fixes: a6619414e0 ("ring: make struct and macros type agnostic")

Signed-off-by: Ferruh Yigit <ferruh.yigit@intel.com>
Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
2017-04-05 18:20:42 +02:00
Reshma Pattan
62d3216d61 app/testpmd: add latency statistics calculation
This patch adds latency stats commandline argument to testpmd,
allowing to specify the lcore to use for latencystats updates.

Signed-off-by: Reshma Pattan <reshma.pattan@intel.com>
Signed-off-by: Harry van Haaren <harry.van.haaren@intel.com>
Signed-off-by: Remy Horton <remy.horton@intel.com>
2017-04-05 18:00:44 +02:00
Reshma Pattan
5cd3cac9ed latency: added new library for latency stats
Add a library designed to calculate latency statistics and report them
to the application when queried. The library measures minimum, average and
maximum latencies, and jitter in nano seconds. The current implementation
supports global latency stats, i.e. per application stats.

Signed-off-by: Reshma Pattan <reshma.pattan@intel.com>
Signed-off-by: Remy Horton <remy.horton@intel.com>
Signed-off-by: Harry van Haaren <harry.van.haaren@intel.com>
2017-04-05 18:00:42 +02:00
Remy Horton
7e4441c8ef app/testpmd: add bitrate statistics calculation
Calculate bitrate statistics using the bitrate stats library. The
resulting statistics can be viewed via proc_info.

Signed-off-by: Remy Horton <remy.horton@intel.com>
2017-04-05 17:59:52 +02:00
Remy Horton
2ad7ba9a65 bitrate: add bitrate statistics library
This patch adds a library that calculates peak and average data-rate
statistics. For ethernet devices. These statistics are reported using
the metrics library.

Signed-off-by: Remy Horton <remy.horton@intel.com>
2017-04-05 17:59:43 +02:00
Reshma Pattan
077c546704 app/proc_info: add metrics displaying
Modify the dpdk-procinfo process to display the newly added metrics.
Added new command line option "--metrics" to display metrics.

Signed-off-by: Reshma Pattan <reshma.pattan@intel.com>
Signed-off-by: Remy Horton <remy.horton@intel.com>
2017-04-05 17:58:54 +02:00
Remy Horton
349950ddb9 metrics: add information metrics library
This patch adds a new information metrics library. This Metrics
library implements a mechanism by which producers can publish
numeric information for later querying by consumers. Metrics
themselves are statistics that are not generated by PMDs, and
hence are not reported via ethdev extended statistics.

Metric information is populated using a push model, where
producers update the values contained within the metric
library by calling an update function on the relevant metrics.
Consumers receive metric information by querying the central
metric data, which is held in shared memory.

Signed-off-by: Remy Horton <remy.horton@intel.com>
2017-04-05 17:58:51 +02:00
Jens Freimann
10def6a107 doc: add missing step in PVP reference benchmark howto
After we configure QEMU we also need to call 'make' to build the binary.
This step is currently missing in the description and this patch fixes
it.

Signed-off-by: Jens Freimann <jfreiman@redhat.com>
Acked-by: John McNamara <john.mcnamara@intel.com>
2017-04-05 15:25:14 +02:00
Thomas Monjalon
3ecbbf9ce8 doc: remove old deprecation notices
The ring and distributor reworks are done.

Fixes: a6619414e0 ("ring: make struct and macros type agnostic")
Fixes: 775003ad2f ("distributor: add new burst-capable library")

Signed-off-by: Thomas Monjalon <thomas.monjalon@6wind.com>
Acked-by: Bruce Richardson <bruce.richardson@intel.com>
2017-04-05 15:21:38 +02:00
Qi Zhang
8c32c192b9 app/testpmd: add command to show/clear VF stats
Add two commands to show/clear VF stats
show vf stats <port_id> <vf_id>
clear vf stats <port_id> <vf_id>

Signed-off-by: Qi Zhang <qi.z.zhang@intel.com>
2017-04-04 19:03:03 +02:00
Olivier Matz
c143e5a3d9 net/i40e: use dynamic log type for control logs
This is an example of how a dynamic log type can be used in a
PMD.

Signed-off-by: Olivier Matz <olivier.matz@6wind.com>
2017-04-05 13:48:45 +02:00
Olivier Matz
caf05a1b86 app/testpmd: new command to dump log types
Signed-off-by: Olivier Matz <olivier.matz@6wind.com>
2017-04-05 13:48:45 +02:00
Olivier Matz
c6bed5f1ea app/test: new command to dump log types
Signed-off-by: Olivier Matz <olivier.matz@6wind.com>
2017-04-05 13:48:45 +02:00
Olivier Matz
4f0981e6ec eal: deprecate log functions
Deprecate the following functions:
- rte_set_log_level(), replaced by rte_log_set_global_level()
- rte_get_log_level(), replaced by rte_log_get_global_level()
- rte_set_log_type(), replaced by rte_log_set_level()
- rte_get_log_type(), replaced by rte_log_get_level()

The new functions provide a better control of the per-type log level,
and have a better name prefix (rte_log_).

Signed-off-by: Olivier Matz <olivier.matz@6wind.com>
2017-04-05 13:48:40 +02:00
Olivier Matz
845afe51e4 eal: change specific log levels at startup
Example of use:
  ./app/test-pmd --log-level='pmd\.i40e.*,8'

  This enables debug logs for all dynamic logs whose type starts with
  'pmd.i40e'.

Signed-off-by: Olivier Matz <olivier.matz@6wind.com>
2017-04-05 13:37:17 +02:00
Olivier Matz
a5279180f5 eal: change several log levels matching a regexp
Introduce a function to set the log level of several log types that
match a regular expression.

Signed-off-by: Olivier Matz <olivier.matz@6wind.com>
2017-04-05 13:37:17 +02:00
Olivier Matz
432050bfd0 eal: dump registered log types
Introduce a function to dump the global level and the registered log
types.

Signed-off-by: Olivier Matz <olivier.matz@6wind.com>
2017-04-05 13:37:17 +02:00
Olivier Matz
c1b5fa94a4 eal: support dynamic log types
Introduce 2 new functions to support dynamic log types:

- rte_log_register(): register a log name, and return a log type id
- rte_log_set_level(): set the log level of a given log type

Signed-off-by: Olivier Matz <olivier.matz@6wind.com>
2017-04-05 13:37:17 +02:00
Olivier Matz
12e58e707c mbuf: bump library version
The reorganization of the mbuf structure induces an ABI breakage.
Bump the library version, and update the documentation accordingly.

Signed-off-by: Olivier Matz <olivier.matz@6wind.com>
2017-04-05 13:37:17 +02:00
Olivier Matz
918ae9dc77 mbuf: add a timestamp field
The field itself is not fully described yet, but this commit reserves
the room in the mbuf.

Signed-off-by: Olivier Matz <olivier.matz@6wind.com>
2017-04-05 11:30:29 +02:00
Olivier Matz
a22659550c mbuf: move sequence number in second cache line
Move this field in the second cache line, since no driver use it
in Rx path. The freed space will be used by a timestamp in next
commit.

Signed-off-by: Olivier Matz <olivier.matz@6wind.com>
2017-04-05 11:30:29 +02:00
Olivier Matz
97cb466d65 mbuf: use 2 bytes for port and nb segments
Change the size of m->port and m->nb_segs to 16 bits. It is now possible
to reference a port identifier larger than 256 and have a mbuf chain
larger than 256 segments.

Signed-off-by: Olivier Matz <olivier.matz@6wind.com>
2017-04-05 11:30:29 +02:00
Jerin Jacob
dc448dc460 mbuf: make rearm data address naturally aligned
To avoid multiple stores on fast path, Ethernet drivers
aggregate the writes to data_off, refcnt, nb_segs and port
to an uint64_t data and write the data in one shot
with uint64_t* at &mbuf->rearm_data address.

Some of the non-IA platforms have store operation overhead
if the store address is not naturally aligned.This patch
fixes the performance issue on those targets.

Signed-off-by: Jerin Jacob <jerin.jacob@caviumnetworks.com>
Signed-off-by: Olivier Matz <olivier.matz@6wind.com>
2017-04-05 11:30:29 +02:00
Olivier Matz
ebb7bcabb8 drivers/net: do not touch mbuf next or nb segs on Rx
Now that the m->next pointer and m->nb_segs is expected to be set (to
NULL and 1 respectively) after a mempool_get(), we can avoid to write them
in the Rx functions of drivers.

Only some drivers are patched, it's not an exhaustive patch. It gives
the idea to do the same in other drivers.

Signed-off-by: Olivier Matz <olivier.matz@6wind.com>
2017-04-05 11:30:29 +02:00
Olivier Matz
8f094a9ac5 mbuf: set mbuf fields while in pool
Set the value of m->refcnt to 1, m->nb_segs to 1 and m->next
to NULL when the mbuf is stored inside the mempool (unused).
This is done in rte_pktmbuf_prefree_seg(), before freeing or
recycling a mbuf.

Before this patch, the value of m->refcnt was expected to be 0
while in pool.

The objectives are:

- to avoid drivers to set m->next to NULL in the early Rx path, since
  this field is in the second 64B of the mbuf and its access could
  trigger a cache miss

- rationalize the behavior of raw_alloc/raw_free: one is now the
  symmetric of the other, and refcnt is never changed in these functions.

To optimize the freeing of the segments, we try try to only update
m->refcnt, m->next, and m->nb_segs when it's required (idea from
Konstantin Ananyev <konstantin.ananyev@intel.com>).

Signed-off-by: Olivier Matz <olivier.matz@6wind.com>
2017-04-05 11:30:29 +02:00