[dpdk-dev] [RFC v3 1/2] eal: replace libc-based random number generation with LFSR
mattias.ronnblom at ericsson.com
Wed May 8 22:30:00 CEST 2019
On 2019-05-08 22:12, Stephen Hemminger wrote:
> On Wed, 24 Apr 2019 14:33:19 +0200
> Mattias Rönnblom <mattias.ronnblom at ericsson.com> wrote:
>> diff --git a/lib/librte_eal/linux/eal/eal.c b/lib/librte_eal/linux/eal/eal.c
>> index 161399619..d6bf0e89e 100644
>> --- a/lib/librte_eal/linux/eal/eal.c
>> +++ b/lib/librte_eal/linux/eal/eal.c
>> @@ -1083,8 +1083,6 @@ rte_eal_init(int argc, char **argv)
>> - rte_srand(rte_rdtsc());
> The current model of seeding with TSC will have problems at scale.
> If a whole rack of machines reboots at the same time because of power cycle,
> it would not be surprising if several had the same TSC value.
> A better solution would be to use the get_random() system call to get
> seed, the kernel can get entropy from more sources.
What version of FreeBSD is DPDK supposed to support? getrandom(2) (and
its cousin getentropy(3)) seem not be available until FreeBSD 12.
More information about the dev