On 2022-05-06 03:26, fengchengwen wrote:
On 2022/5/1 22:03, Mattias Rönnblom wrote:
A sequence lock (seqlock) is synchronization primitive which allows
for data-race free, low-overhead, high-frequency reads, especially for
data structures shared across many cores and which are updated
relatively
> >>> +__rte_experimental
> >>> +static inline bool
> >>> +rte_seqlock_read_retry(const rte_seqlock_t *seqlock, uint32_t
> >>> +begin_sn) {
> >>> + uint32_t end_sn;
> >>> +
> >>> + /* An odd sequence number means the protected data was being
> >>> + * modified already at the point of the rte_seq
> > +__rte_experimental
> > +static inline bool
> > +rte_seqlock_read_retry(const rte_seqlock_t *seqlock, uint32_t
> > +begin_sn) {
> > + uint32_t end_sn;
> > +
> > + /* An odd sequence number means the protected data was being
> > +* modified already at the point of the rte_seqlock_read_
On Sun, May 1, 2022 at 4:22 PM Mattias Rönnblom wrote:
>
> On 2022-05-01 16:03, Mattias Rönnblom wrote:
> > A sequence lock (seqlock) is synchronization primitive which allows
>
> "/../ is a /../"
>
>
>
> David, maybe you can fix this typo? Unless there is a need for a new
> version.
Noted.
No n
On 2022-05-01 22:17, Stephen Hemminger wrote:
> On Sun, 1 May 2022 16:03:27 +0200
> Mattias Rönnblom wrote:
>
>> +struct data {
>> +rte_seqlock_t lock;
>> +
>> +uint64_t a;
>> +uint64_t b __rte_cache_aligned;
>> +uint64_t c __rte_cache_aligned;
>> +} __rte_cache_aligned;
>
> This
On Sun, 1 May 2022 16:03:27 +0200
Mattias Rönnblom wrote:
> +struct data {
> + rte_seqlock_t lock;
> +
> + uint64_t a;
> + uint64_t b __rte_cache_aligned;
> + uint64_t c __rte_cache_aligned;
> +} __rte_cache_aligned;
This will end up taking 192 bytes per lock.
Which is a lot espe
On 2022-05-01 16:03, Mattias Rönnblom wrote:
A sequence lock (seqlock) is synchronization primitive which allows
"/../ is a /../"
David, maybe you can fix this typo? Unless there is a need for a new
version.
A sequence lock (seqlock) is synchronization primitive which allows
for data-race free, low-overhead, high-frequency reads, especially for
data structures shared across many cores and which are updated
relatively infrequently.
A seqlock permits multiple parallel readers. The variant of seqlock
imp
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