[2/2] app/testpmd: add disable-flow-flush parameter
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Commit Message
This patch adds "--disable-flow-flush" parameter, which could used to
disable port flow flush when stop port. It allows testing keep flow
rules or shared flow objects across restart.
Signed-off-by: Chengwen Feng <fengchengwen@huawei.com>
---
app/test-pmd/parameters.c | 4 ++++
app/test-pmd/testpmd.c | 7 ++++++-
app/test-pmd/testpmd.h | 1 +
doc/guides/testpmd_app_ug/run_app.rst | 5 +++++
4 files changed, 16 insertions(+), 1 deletion(-)
Comments
On 12/15/2022 7:11 AM, Chengwen Feng wrote:
> This patch adds "--disable-flow-flush" parameter, which could used to
> disable port flow flush when stop port. It allows testing keep flow
> rules or shared flow objects across restart.
>
> Signed-off-by: Chengwen Feng<fengchengwen@huawei.com>
> ---
> app/test-pmd/parameters.c | 4 ++++
> app/test-pmd/testpmd.c | 7 ++++++-
> app/test-pmd/testpmd.h | 1 +
> doc/guides/testpmd_app_ug/run_app.rst | 5 +++++
> 4 files changed, 16 insertions(+), 1 deletion(-)
>
> diff --git a/app/test-pmd/parameters.c b/app/test-pmd/parameters.c
> index d597c209ba..e734ad9a02 100644
> --- a/app/test-pmd/parameters.c
> +++ b/app/test-pmd/parameters.c
> @@ -175,6 +175,7 @@ usage(char* progname)
> "disable print of designated event or all of them.\n");
> printf(" --flow-isolate-all: "
> "requests flow API isolated mode on all ports at initialization time.\n");
> + printf(" --disable-flow-flush: disable port flow flush when stop port.\n");
> printf(" --tx-offloads=0xXXXXXXXX: hexadecimal bitmask of TX queue offloads\n");
> printf(" --rx-offloads=0xXXXXXXXX: hexadecimal bitmask of RX queue offloads\n");
> printf(" --hot-plug: enable hot plug for device.\n");
> @@ -667,6 +668,7 @@ launch_args_parse(int argc, char** argv)
> { "rxfreet", 1, 0, 0 },
> { "no-flush-rx", 0, 0, 0 },
> { "flow-isolate-all", 0, 0, 0 },
> + { "disable-flow-flush", 0, 0, 0 },
> { "rxoffs", 1, 0, 0 },
> { "rxpkts", 1, 0, 0 },
> { "rxhdrs", 1, 0, 0 },
> @@ -1330,6 +1332,8 @@ launch_args_parse(int argc, char** argv)
> rmv_interrupt = 0;
> if (!strcmp(lgopts[opt_idx].name, "flow-isolate-all"))
> flow_isolate_all = 1;
> + if (!strcmp(lgopts[opt_idx].name, "disable-flow-flush"))
> + no_flow_flush = 1;
> if (!strcmp(lgopts[opt_idx].name, "tx-offloads")) {
> char *end = NULL;
> n = strtoull(optarg, &end, 16);
> diff --git a/app/test-pmd/testpmd.c b/app/test-pmd/testpmd.c
> index 134d79a555..ea78f8982d 100644
> --- a/app/test-pmd/testpmd.c
> +++ b/app/test-pmd/testpmd.c
> @@ -383,6 +383,11 @@ uint8_t no_flush_rx = 0; /* flush by default */
> */
> uint8_t flow_isolate_all;
>
> +/*
> + * Disable port flow flush when stop port.
> + */
> +uint8_t no_flow_flush = 0; /* do flow flush by default */
> +
> /*
> * Avoids to check link status when starting/stopping a port.
> */
> @@ -3246,7 +3251,7 @@ stop_port(portid_t pid)
> }
> }
>
> - if (port->flow_list)
> + if (port->flow_list && !no_flow_flush)
> port_flow_flush(pi);
In case stop_port() is called through pmd_test_exit(), should the flag
be disabled for flush to happen.
>
> ret = eth_dev_stop_mp(pi);
> diff --git a/app/test-pmd/testpmd.h b/app/test-pmd/testpmd.h
> index 7d24d25970..ab4733522d 100644
> --- a/app/test-pmd/testpmd.h
> +++ b/app/test-pmd/testpmd.h
> @@ -476,6 +476,7 @@ extern uint8_t numa_support; /**< set by "--numa" parameter */
> extern uint16_t port_topology; /**< set by "--port-topology" parameter */
> extern uint8_t no_flush_rx; /**<set by "--no-flush-rx" parameter */
> extern uint8_t flow_isolate_all; /**< set by "--flow-isolate-all */
> +extern uint8_t no_flow_flush; /**< set by "--disable-flow-flush" parameter */
> extern uint8_t mp_alloc_type;
> /**< set by "--mp-anon" or "--mp-alloc" parameter */
> extern uint32_t eth_link_speed;
> diff --git a/doc/guides/testpmd_app_ug/run_app.rst b/doc/guides/testpmd_app_ug/run_app.rst
> index 074f910fc9..3ec3d4f5e6 100644
> --- a/doc/guides/testpmd_app_ug/run_app.rst
> +++ b/doc/guides/testpmd_app_ug/run_app.rst
> @@ -436,6 +436,11 @@ The command line options are:
>
> Ports that do not support this mode are automatically discarded.
>
> +* ``--disable-flow-flush``
> +
> + Disable port flow flush when stop port. This allows testing keep flow rules
> + or shared flow objects across restart.
> +
> * ``--tx-offloads=0xXXXXXXXX``
>
> Set the hexadecimal bitmask of TX queue offloads.
On 1/23/2023 3:01 PM, Singh, Aman Deep wrote:
>
> On 12/15/2022 7:11 AM, Chengwen Feng wrote:
>> This patch adds "--disable-flow-flush" parameter, which could used to
>> disable port flow flush when stop port. It allows testing keep flow
>> rules or shared flow objects across restart.
>>
>> Signed-off-by: Chengwen Feng <fengchengwen@huawei.com>
>> ---
>> app/test-pmd/parameters.c | 4 ++++
>> app/test-pmd/testpmd.c | 7 ++++++-
>> app/test-pmd/testpmd.h | 1 +
>> doc/guides/testpmd_app_ug/run_app.rst | 5 +++++
>> 4 files changed, 16 insertions(+), 1 deletion(-)
>>
>> diff --git a/app/test-pmd/parameters.c b/app/test-pmd/parameters.c
>> index d597c209ba..e734ad9a02 100644
>> --- a/app/test-pmd/parameters.c
>> +++ b/app/test-pmd/parameters.c
>> @@ -175,6 +175,7 @@ usage(char* progname)
>> "disable print of designated event or all of them.\n");
>> printf(" --flow-isolate-all: "
>> "requests flow API isolated mode on all ports at initialization time.\n");
>> + printf(" --disable-flow-flush: disable port flow flush when stop port.\n");
>> printf(" --tx-offloads=0xXXXXXXXX: hexadecimal bitmask of TX queue offloads\n");
>> printf(" --rx-offloads=0xXXXXXXXX: hexadecimal bitmask of RX queue offloads\n");
>> printf(" --hot-plug: enable hot plug for device.\n");
>> @@ -667,6 +668,7 @@ launch_args_parse(int argc, char** argv)
>> { "rxfreet", 1, 0, 0 },
>> { "no-flush-rx", 0, 0, 0 },
>> { "flow-isolate-all", 0, 0, 0 },
>> + { "disable-flow-flush", 0, 0, 0 },
>> { "rxoffs", 1, 0, 0 },
>> { "rxpkts", 1, 0, 0 },
>> { "rxhdrs", 1, 0, 0 },
>> @@ -1330,6 +1332,8 @@ launch_args_parse(int argc, char** argv)
>> rmv_interrupt = 0;
>> if (!strcmp(lgopts[opt_idx].name, "flow-isolate-all"))
>> flow_isolate_all = 1;
>> + if (!strcmp(lgopts[opt_idx].name, "disable-flow-flush"))
>> + no_flow_flush = 1;
>> if (!strcmp(lgopts[opt_idx].name, "tx-offloads")) {
>> char *end = NULL;
>> n = strtoull(optarg, &end, 16);
>> diff --git a/app/test-pmd/testpmd.c b/app/test-pmd/testpmd.c
>> index 134d79a555..ea78f8982d 100644
>> --- a/app/test-pmd/testpmd.c
>> +++ b/app/test-pmd/testpmd.c
>> @@ -383,6 +383,11 @@ uint8_t no_flush_rx = 0; /* flush by default */
>> */
>> uint8_t flow_isolate_all;
>>
>> +/*
>> + * Disable port flow flush when stop port.
>> + */
>> +uint8_t no_flow_flush = 0; /* do flow flush by default */
>> +
>> /*
>> * Avoids to check link status when starting/stopping a port.
>> */
>> @@ -3246,7 +3251,7 @@ stop_port(portid_t pid)
>> }
>> }
>>
>> - if (port->flow_list)
>> + if (port->flow_list && !no_flow_flush)
>> port_flow_flush(pi);
>
> In case stop_port() is called through pmd_test_exit(), should the flag
> be disabled for flush to happen.
>
In case of 'pmd_test_exit()', 'close_port()' will be called after port
stop which will make port unusable anyway.
As long as there is no memory leak in that path, I think no need to for
flow flush.
@Chengwen, can you please check and confirm there won't be any resource
leak in case of 'no_flow_flush' is set and testpmd terminated via
'pmd_test_exit()' call?
And rest looks good to me.
>>
>> ret = eth_dev_stop_mp(pi);
>> diff --git a/app/test-pmd/testpmd.h b/app/test-pmd/testpmd.h
>> index 7d24d25970..ab4733522d 100644
>> --- a/app/test-pmd/testpmd.h
>> +++ b/app/test-pmd/testpmd.h
>> @@ -476,6 +476,7 @@ extern uint8_t numa_support; /**< set by "--numa" parameter */
>> extern uint16_t port_topology; /**< set by "--port-topology" parameter */
>> extern uint8_t no_flush_rx; /**<set by "--no-flush-rx" parameter */
>> extern uint8_t flow_isolate_all; /**< set by "--flow-isolate-all */
>> +extern uint8_t no_flow_flush; /**< set by "--disable-flow-flush" parameter */
>> extern uint8_t mp_alloc_type;
>> /**< set by "--mp-anon" or "--mp-alloc" parameter */
>> extern uint32_t eth_link_speed;
>> diff --git a/doc/guides/testpmd_app_ug/run_app.rst b/doc/guides/testpmd_app_ug/run_app.rst
>> index 074f910fc9..3ec3d4f5e6 100644
>> --- a/doc/guides/testpmd_app_ug/run_app.rst
>> +++ b/doc/guides/testpmd_app_ug/run_app.rst
>> @@ -436,6 +436,11 @@ The command line options are:
>>
>> Ports that do not support this mode are automatically discarded.
>>
>> +* ``--disable-flow-flush``
>> +
>> + Disable port flow flush when stop port. This allows testing keep flow rules
>> + or shared flow objects across restart.
>> +
>> * ``--tx-offloads=0xXXXXXXXX``
>>
>> Set the hexadecimal bitmask of TX queue offloads.
On 12/15/2022 1:41 AM, Chengwen Feng wrote:
> This patch adds "--disable-flow-flush" parameter, which could used to
> disable port flow flush when stop port. It allows testing keep flow
> rules or shared flow objects across restart.
>
> Signed-off-by: Chengwen Feng <fengchengwen@huawei.com>
+cc Ori
I am for proceeding with this patch unless there is objection from Aman
& Ori.
> ---
> app/test-pmd/parameters.c | 4 ++++
> app/test-pmd/testpmd.c | 7 ++++++-
> app/test-pmd/testpmd.h | 1 +
> doc/guides/testpmd_app_ug/run_app.rst | 5 +++++
> 4 files changed, 16 insertions(+), 1 deletion(-)
>
> diff --git a/app/test-pmd/parameters.c b/app/test-pmd/parameters.c
> index d597c209ba..e734ad9a02 100644
> --- a/app/test-pmd/parameters.c
> +++ b/app/test-pmd/parameters.c
> @@ -175,6 +175,7 @@ usage(char* progname)
> "disable print of designated event or all of them.\n");
> printf(" --flow-isolate-all: "
> "requests flow API isolated mode on all ports at initialization time.\n");
> + printf(" --disable-flow-flush: disable port flow flush when stop port.\n");
> printf(" --tx-offloads=0xXXXXXXXX: hexadecimal bitmask of TX queue offloads\n");
> printf(" --rx-offloads=0xXXXXXXXX: hexadecimal bitmask of RX queue offloads\n");
> printf(" --hot-plug: enable hot plug for device.\n");
> @@ -667,6 +668,7 @@ launch_args_parse(int argc, char** argv)
> { "rxfreet", 1, 0, 0 },
> { "no-flush-rx", 0, 0, 0 },
> { "flow-isolate-all", 0, 0, 0 },
> + { "disable-flow-flush", 0, 0, 0 },
> { "rxoffs", 1, 0, 0 },
> { "rxpkts", 1, 0, 0 },
> { "rxhdrs", 1, 0, 0 },
> @@ -1330,6 +1332,8 @@ launch_args_parse(int argc, char** argv)
> rmv_interrupt = 0;
> if (!strcmp(lgopts[opt_idx].name, "flow-isolate-all"))
> flow_isolate_all = 1;
> + if (!strcmp(lgopts[opt_idx].name, "disable-flow-flush"))
> + no_flow_flush = 1;
> if (!strcmp(lgopts[opt_idx].name, "tx-offloads")) {
> char *end = NULL;
> n = strtoull(optarg, &end, 16);
> diff --git a/app/test-pmd/testpmd.c b/app/test-pmd/testpmd.c
> index 134d79a555..ea78f8982d 100644
> --- a/app/test-pmd/testpmd.c
> +++ b/app/test-pmd/testpmd.c
> @@ -383,6 +383,11 @@ uint8_t no_flush_rx = 0; /* flush by default */
> */
> uint8_t flow_isolate_all;
>
> +/*
> + * Disable port flow flush when stop port.
> + */
> +uint8_t no_flow_flush = 0; /* do flow flush by default */
> +
> /*
> * Avoids to check link status when starting/stopping a port.
> */
> @@ -3246,7 +3251,7 @@ stop_port(portid_t pid)
> }
> }
>
> - if (port->flow_list)
> + if (port->flow_list && !no_flow_flush)
> port_flow_flush(pi);
>
> ret = eth_dev_stop_mp(pi);
> diff --git a/app/test-pmd/testpmd.h b/app/test-pmd/testpmd.h
> index 7d24d25970..ab4733522d 100644
> --- a/app/test-pmd/testpmd.h
> +++ b/app/test-pmd/testpmd.h
> @@ -476,6 +476,7 @@ extern uint8_t numa_support; /**< set by "--numa" parameter */
> extern uint16_t port_topology; /**< set by "--port-topology" parameter */
> extern uint8_t no_flush_rx; /**<set by "--no-flush-rx" parameter */
> extern uint8_t flow_isolate_all; /**< set by "--flow-isolate-all */
> +extern uint8_t no_flow_flush; /**< set by "--disable-flow-flush" parameter */
> extern uint8_t mp_alloc_type;
> /**< set by "--mp-anon" or "--mp-alloc" parameter */
> extern uint32_t eth_link_speed;
> diff --git a/doc/guides/testpmd_app_ug/run_app.rst b/doc/guides/testpmd_app_ug/run_app.rst
> index 074f910fc9..3ec3d4f5e6 100644
> --- a/doc/guides/testpmd_app_ug/run_app.rst
> +++ b/doc/guides/testpmd_app_ug/run_app.rst
> @@ -436,6 +436,11 @@ The command line options are:
>
> Ports that do not support this mode are automatically discarded.
>
> +* ``--disable-flow-flush``
> +
> + Disable port flow flush when stop port. This allows testing keep flow rules
> + or shared flow objects across restart.
> +
> * ``--tx-offloads=0xXXXXXXXX``
>
> Set the hexadecimal bitmask of TX queue offloads.
Hi,
> -----Original Message-----
> From: Ferruh Yigit <ferruh.yigit@amd.com>
> Sent: Wednesday, 25 January 2023 20:38
>
> On 12/15/2022 1:41 AM, Chengwen Feng wrote:
> > This patch adds "--disable-flow-flush" parameter, which could used to
> > disable port flow flush when stop port. It allows testing keep flow
> > rules or shared flow objects across restart.
> >
> > Signed-off-by: Chengwen Feng <fengchengwen@huawei.com>
>
> +cc Ori
>
> I am for proceeding with this patch unless there is objection from Aman
> & Ori.
>
> > ---
> > app/test-pmd/parameters.c | 4 ++++
> > app/test-pmd/testpmd.c | 7 ++++++-
> > app/test-pmd/testpmd.h | 1 +
> > doc/guides/testpmd_app_ug/run_app.rst | 5 +++++
> > 4 files changed, 16 insertions(+), 1 deletion(-)
> >
> > diff --git a/app/test-pmd/parameters.c b/app/test-pmd/parameters.c
> > index d597c209ba..e734ad9a02 100644
> > --- a/app/test-pmd/parameters.c
> > +++ b/app/test-pmd/parameters.c
> > @@ -175,6 +175,7 @@ usage(char* progname)
> > "disable print of designated event or all of them.\n");
> > printf(" --flow-isolate-all: "
> > "requests flow API isolated mode on all ports at initialization
> time.\n");
> > + printf(" --disable-flow-flush: disable port flow flush when stop
> port.\n");
> > printf(" --tx-offloads=0xXXXXXXXX: hexadecimal bitmask of TX
> queue offloads\n");
> > printf(" --rx-offloads=0xXXXXXXXX: hexadecimal bitmask of RX
> queue offloads\n");
> > printf(" --hot-plug: enable hot plug for device.\n");
> > @@ -667,6 +668,7 @@ launch_args_parse(int argc, char** argv)
> > { "rxfreet", 1, 0, 0 },
> > { "no-flush-rx", 0, 0, 0 },
> > { "flow-isolate-all", 0, 0, 0 },
> > + { "disable-flow-flush", 0, 0, 0 },
> > { "rxoffs", 1, 0, 0 },
> > { "rxpkts", 1, 0, 0 },
> > { "rxhdrs", 1, 0, 0 },
> > @@ -1330,6 +1332,8 @@ launch_args_parse(int argc, char** argv)
> > rmv_interrupt = 0;
> > if (!strcmp(lgopts[opt_idx].name, "flow-isolate-all"))
> > flow_isolate_all = 1;
> > + if (!strcmp(lgopts[opt_idx].name, "disable-flow-
> flush"))
> > + no_flow_flush = 1;
> > if (!strcmp(lgopts[opt_idx].name, "tx-offloads")) {
> > char *end = NULL;
> > n = strtoull(optarg, &end, 16);
> > diff --git a/app/test-pmd/testpmd.c b/app/test-pmd/testpmd.c
> > index 134d79a555..ea78f8982d 100644
> > --- a/app/test-pmd/testpmd.c
> > +++ b/app/test-pmd/testpmd.c
> > @@ -383,6 +383,11 @@ uint8_t no_flush_rx = 0; /* flush by default */
> > */
> > uint8_t flow_isolate_all;
> >
> > +/*
> > + * Disable port flow flush when stop port.
> > + */
> > +uint8_t no_flow_flush = 0; /* do flow flush by default */
> > +
> > /*
> > * Avoids to check link status when starting/stopping a port.
> > */
> > @@ -3246,7 +3251,7 @@ stop_port(portid_t pid)
> > }
> > }
> >
> > - if (port->flow_list)
> > + if (port->flow_list && !no_flow_flush)
> > port_flow_flush(pi);
> >
> > ret = eth_dev_stop_mp(pi);
> > diff --git a/app/test-pmd/testpmd.h b/app/test-pmd/testpmd.h
> > index 7d24d25970..ab4733522d 100644
> > --- a/app/test-pmd/testpmd.h
> > +++ b/app/test-pmd/testpmd.h
> > @@ -476,6 +476,7 @@ extern uint8_t numa_support; /**< set by "--
> numa" parameter */
> > extern uint16_t port_topology; /**< set by "--port-topology" parameter
> */
> > extern uint8_t no_flush_rx; /**<set by "--no-flush-rx" parameter */
> > extern uint8_t flow_isolate_all; /**< set by "--flow-isolate-all */
> > +extern uint8_t no_flow_flush; /**< set by "--disable-flow-flush"
> parameter */
> > extern uint8_t mp_alloc_type;
> > /**< set by "--mp-anon" or "--mp-alloc" parameter */
> > extern uint32_t eth_link_speed;
> > diff --git a/doc/guides/testpmd_app_ug/run_app.rst
> b/doc/guides/testpmd_app_ug/run_app.rst
> > index 074f910fc9..3ec3d4f5e6 100644
> > --- a/doc/guides/testpmd_app_ug/run_app.rst
> > +++ b/doc/guides/testpmd_app_ug/run_app.rst
> > @@ -436,6 +436,11 @@ The command line options are:
> >
> > Ports that do not support this mode are automatically discarded.
> >
> > +* ``--disable-flow-flush``
> > +
> > + Disable port flow flush when stop port. This allows testing keep flow
> rules
> > + or shared flow objects across restart.
> > +
> > * ``--tx-offloads=0xXXXXXXXX``
> >
> > Set the hexadecimal bitmask of TX queue offloads.
Acked-by: Ori Kam <orika@nvidia.com>
Best,
Ori
On 1/26/2023 12:07 AM, Ferruh Yigit wrote:
> On 12/15/2022 1:41 AM, Chengwen Feng wrote:
>> This patch adds "--disable-flow-flush" parameter, which could used to
>> disable port flow flush when stop port. It allows testing keep flow
>> rules or shared flow objects across restart.
>>
>> Signed-off-by: Chengwen Feng<fengchengwen@huawei.com>
Acked-by: Aman Singh<aman.deep.singh@intel.com>
<snip>
@@ -175,6 +175,7 @@ usage(char* progname)
"disable print of designated event or all of them.\n");
printf(" --flow-isolate-all: "
"requests flow API isolated mode on all ports at initialization time.\n");
+ printf(" --disable-flow-flush: disable port flow flush when stop port.\n");
printf(" --tx-offloads=0xXXXXXXXX: hexadecimal bitmask of TX queue offloads\n");
printf(" --rx-offloads=0xXXXXXXXX: hexadecimal bitmask of RX queue offloads\n");
printf(" --hot-plug: enable hot plug for device.\n");
@@ -667,6 +668,7 @@ launch_args_parse(int argc, char** argv)
{ "rxfreet", 1, 0, 0 },
{ "no-flush-rx", 0, 0, 0 },
{ "flow-isolate-all", 0, 0, 0 },
+ { "disable-flow-flush", 0, 0, 0 },
{ "rxoffs", 1, 0, 0 },
{ "rxpkts", 1, 0, 0 },
{ "rxhdrs", 1, 0, 0 },
@@ -1330,6 +1332,8 @@ launch_args_parse(int argc, char** argv)
rmv_interrupt = 0;
if (!strcmp(lgopts[opt_idx].name, "flow-isolate-all"))
flow_isolate_all = 1;
+ if (!strcmp(lgopts[opt_idx].name, "disable-flow-flush"))
+ no_flow_flush = 1;
if (!strcmp(lgopts[opt_idx].name, "tx-offloads")) {
char *end = NULL;
n = strtoull(optarg, &end, 16);
@@ -383,6 +383,11 @@ uint8_t no_flush_rx = 0; /* flush by default */
*/
uint8_t flow_isolate_all;
+/*
+ * Disable port flow flush when stop port.
+ */
+uint8_t no_flow_flush = 0; /* do flow flush by default */
+
/*
* Avoids to check link status when starting/stopping a port.
*/
@@ -3246,7 +3251,7 @@ stop_port(portid_t pid)
}
}
- if (port->flow_list)
+ if (port->flow_list && !no_flow_flush)
port_flow_flush(pi);
ret = eth_dev_stop_mp(pi);
@@ -476,6 +476,7 @@ extern uint8_t numa_support; /**< set by "--numa" parameter */
extern uint16_t port_topology; /**< set by "--port-topology" parameter */
extern uint8_t no_flush_rx; /**<set by "--no-flush-rx" parameter */
extern uint8_t flow_isolate_all; /**< set by "--flow-isolate-all */
+extern uint8_t no_flow_flush; /**< set by "--disable-flow-flush" parameter */
extern uint8_t mp_alloc_type;
/**< set by "--mp-anon" or "--mp-alloc" parameter */
extern uint32_t eth_link_speed;
@@ -436,6 +436,11 @@ The command line options are:
Ports that do not support this mode are automatically discarded.
+* ``--disable-flow-flush``
+
+ Disable port flow flush when stop port. This allows testing keep flow rules
+ or shared flow objects across restart.
+
* ``--tx-offloads=0xXXXXXXXX``
Set the hexadecimal bitmask of TX queue offloads.