On Mon, May 23, 2022 at 4:24 PM Mattias Rönnblom
wrote:
>
> A sequence lock (seqlock) is a synchronization primitive which allows
> for data-race free, low-overhead, high-frequency reads, suitable for
> data structures shared across many cores and which are updated
> relatively infrequently.
>
> A
On 2022-06-01 18:15, Stephen Hemminger wrote:
> On Wed, 1 Jun 2022 08:19:54 +
> Mattias Rönnblom wrote:
>
>> On 2022-06-01 00:45, Stephen Hemminger wrote:
>>> On Mon, 23 May 2022 16:23:46 +0200
>>> Mattias Rönnblom wrote:
>>>
+/**
+ * The RTE seqcount type.
+ */
+type
On Wed, 1 Jun 2022 08:19:54 +
Mattias Rönnblom wrote:
> On 2022-06-01 00:45, Stephen Hemminger wrote:
> > On Mon, 23 May 2022 16:23:46 +0200
> > Mattias Rönnblom wrote:
> >
> >> +/**
> >> + * The RTE seqcount type.
> >> + */
> >> +typedef struct {
> >> + uint32_t sn; /**< A sequence numb
> From: Mattias Rönnblom [mailto:mattias.ronnb...@ericsson.com]
> Sent: Wednesday, 1 June 2022 11.02
>
> On 2022-05-31 13:52, David Marchand wrote:
> > On Mon, May 23, 2022 at 4:24 PM Mattias Rönnblom
> > wrote:
> >>
> >> A sequence lock (seqlock) is a synchronization primitive which
> allows
> >
On 2022-05-31 13:52, David Marchand wrote:
> On Mon, May 23, 2022 at 4:24 PM Mattias Rönnblom
> wrote:
>>
>> A sequence lock (seqlock) is a synchronization primitive which allows
>> for data-race free, low-overhead, high-frequency reads, suitable for
>> data structures shared across many cores and
On 2022-06-01 00:45, Stephen Hemminger wrote:
> On Mon, 23 May 2022 16:23:46 +0200
> Mattias Rönnblom wrote:
>
>> +/**
>> + * The RTE seqcount type.
>> + */
>> +typedef struct {
>> +uint32_t sn; /**< A sequence number for the protected data. */
>> +} rte_seqcount_t;
>
> Don't need structure
> From: Stephen Hemminger [mailto:step...@networkplumber.org]
> Sent: Wednesday, 1 June 2022 00.46
>
> On Mon, 23 May 2022 16:23:46 +0200
> Mattias Rönnblom wrote:
>
> > +/**
> > + * The RTE seqcount type.
> > + */
> > +typedef struct {
> > + uint32_t sn; /**< A sequence number for the protect
>
> On Mon, 23 May 2022 16:23:46 +0200
> Mattias Rönnblom wrote:
>
> > +
> > + /* make sure the data loads happens before the sn load */
> > + rte_atomic_thread_fence(__ATOMIC_ACQUIRE);
>
> Why mix __atomic builtin with rte_atomic?
> Instead:
> __atomic_thread_fence(__ATOMIC_ACQUI
On Mon, 23 May 2022 16:23:46 +0200
Mattias Rönnblom wrote:
> +
> + /* make sure the data loads happens before the sn load */
> + rte_atomic_thread_fence(__ATOMIC_ACQUIRE);
Why mix __atomic builtin with rte_atomic?
Instead:
__atomic_thread_fence(__ATOMIC_ACQUIRE);
On Mon, 23 May 2022 16:23:46 +0200
Mattias Rönnblom wrote:
> +/**
> + * The RTE seqcount type.
> + */
> +typedef struct {
> + uint32_t sn; /**< A sequence number for the protected data. */
> +} rte_seqcount_t;
Don't need structure for only one element.
typedef uint32_t rte_seqcount_t;
+
On Mon, May 23, 2022 at 4:24 PM Mattias Rönnblom
wrote:
>
> A sequence lock (seqlock) is a synchronization primitive which allows
> for data-race free, low-overhead, high-frequency reads, suitable for
> data structures shared across many cores and which are updated
> relatively infrequently.
>
> A
A sequence lock (seqlock) is a synchronization primitive which allows
for data-race free, low-overhead, high-frequency reads, suitable for
data structures shared across many cores and which are updated
relatively infrequently.
A seqlock permits multiple parallel readers. A spinlock is used to
seri
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