d/numam-dpdk
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

event/octeontx2: add devargs to limit timer adapters

Browse Source 
Add devargs to limit the max number of TIM rings reserved on probe.
Since, TIM rings are HW resources we can avoid starving other
applications by not grabbing all the rings.

Example:
	--dev "0002:0e:00.0,tim_rings_lmt=2"

Signed-off-by: Pavan Nikhilesh <pbhagavatula@marvell.com>
This commit is contained in:
Pavan Nikhilesh 2019-06-28 23:53:52 +05:30 committed by Jerin Jacob
parent d202edd715
commit b2530cda86
3 changed files with 16 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
doc/guides/eventdevs/octeontx2.rst
View File

@ -122,6 +122,16 @@ Runtime Config Options
--dev "0002:0e:00.0,tim_stats_ena=1"
- ``TIM limit max rings reserved``
The ``tim_rings_lmt`` devargs can be used to limit the max number of TIM
rings i.e. event timer adapter reserved on probe. Since, TIM rings are HW
resources we can avoid starving other applications by not grabbing all the
rings.
For example::
--dev "0002:0e:00.0,tim_rings_lmt=5"
Debugging Options
~~~~~~~~~~~~~~~~~

6
drivers/event/octeontx2/otx2_tim_evdev.c
View File

@ -528,6 +528,7 @@ otx2_tim_caps_get(const struct rte_eventdev *evdev, uint64_t flags,
#define OTX2_TIM_DISABLE_NPA "tim_disable_npa"
#define OTX2_TIM_CHNK_SLOTS "tim_chnk_slots"
#define OTX2_TIM_STATS_ENA "tim_stats_ena"
#define OTX2_TIM_RINGS_LMT "tim_rings_lmt"
static void
tim_parse_devargs(struct rte_devargs *devargs, struct otx2_tim_evdev *dev)
@ -547,6 +548,8 @@ tim_parse_devargs(struct rte_devargs *devargs, struct otx2_tim_evdev *dev)
&parse_kvargs_value, &dev->chunk_slots);
rte_kvargs_process(kvlist, OTX2_TIM_STATS_ENA, &parse_kvargs_flag,
&dev->enable_stats);
rte_kvargs_process(kvlist, OTX2_TIM_RINGS_LMT, &parse_kvargs_value,
&dev->min_ring_cnt);
}
void
@ -584,7 +587,8 @@ otx2_tim_init(struct rte_pci_device *pci_dev, struct otx2_dev *cmn_dev)
goto mz_free;
}
dev->nb_rings = rsrc_cnt->tim;
dev->nb_rings = dev->min_ring_cnt ?
RTE_MIN(dev->min_ring_cnt, rsrc_cnt->tim) : rsrc_cnt->tim;
if (!dev->nb_rings) {
otx2_tim_dbg("No TIM Logical functions provisioned.");

1
drivers/event/octeontx2/otx2_tim_evdev.h
View File

@ -121,6 +121,7 @@ struct otx2_tim_evdev {
/* Dev args */
uint8_t disable_npa;
uint16_t chunk_slots;
uint16_t min_ring_cnt;
uint8_t enable_stats;
/* MSIX offsets */
uint16_t tim_msixoff[OTX2_MAX_TIM_RINGS];