DPDK usage discussions
 help / color / Atom feed
* [dpdk-users] rte_pktmbuf_pool_create()  performance
       [not found] <1065727738.41362.1587601688678.ref@mail.yahoo.com>
@ 2020-04-23  0:28 ` amit sehas
  0 siblings, 0 replies; only message in thread
From: amit sehas @ 2020-04-23  0:28 UTC (permalink / raw)
  To: users

I switched from utilizing dpdk 16.11.1 to dpdk 18.11.6, in the process I started utilizing --single-file-segments,previously I was utilizing a patch for the same functionality on dpdk-16.11.1. And while linking I somehowneed to link in -lnuma now which I previously did not need to. I don't know what dependencies have beenintroduced by dpdk-18.11.6 but I can no longer build my executables without linking in numa.

That is the only notable change I made. And nothing else has changed, huge pages, tlbs etc are all the same.

yet the performance of rte_pktmbuf_pool_create() has completely tanked, it has become much much slower.I am quite new to dpdk and am not sure what is going on … so I went in with a debugger and this is whati find:

this function call is taking up all the time:  rte_mempool_populate_default()
which in turn invokes the following which is taking all the time:   rte_memzone_reserve_aligned()
which in turn invokes the following which is taking all the time:memzone_reserve_aligned_thread_unsafe()
which in turn invokes the following which is taking all the time: malloc_heap_alloc()
which in turn invokes the following which is taking all the time: malloc_get_numa_socket()
It could also be that this is the function that is the most time consuming:malloc_heap_alloc_on_heap_id()

My guess is that somehow numa has started interfering with the performance, but i am not quite sure what to do to fix it...

any help is greatly appreciated, i suspect someone familiar with the above should quickly identify the issue and its remedy...


^ permalink raw reply	[flat|nested] only message in thread

only message in thread, back to index

Thread overview: (only message) (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
     [not found] <1065727738.41362.1587601688678.ref@mail.yahoo.com>
2020-04-23  0:28 ` [dpdk-users] rte_pktmbuf_pool_create() performance amit sehas

DPDK usage discussions

Archives are clonable:
	git clone --mirror http://inbox.dpdk.org/users/0 users/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 users users/ http://inbox.dpdk.org/users \
	public-inbox-index users

Newsgroup available over NNTP:

AGPL code for this site: git clone https://public-inbox.org/ public-inbox