On 15/08/2019 15:15, Quentin Monnet wrote:
> So if I understand correctly, we would use the bpf() syscall to trigger
> a run of such program on all map entries (for map implementing the new
> operation), and the context would include pointers to the key and the
> value for the entry being processed
2019-08-14 18:14 UTC+0100 ~ Edward Cree
> On 14/08/2019 17:58, Quentin Monnet wrote:
>> 2019-08-14 17:45 UTC+0100 ~ Edward Cree
>>> This might be a really dumb suggestion, but: you're wanting to collect a
>>> summary statistic over an in-kernel data structure in a single syscall,
>>> because ma
2019-08-14 13:18 UTC-0700 ~ Andrii Nakryiko
> On Wed, Aug 14, 2019 at 10:12 AM Quentin Monnet
> wrote:
>>
>> 2019-08-14 09:58 UTC-0700 ~ Alexei Starovoitov
>>
>>> On Wed, Aug 14, 2019 at 9:45 AM Edward Cree wrote:
On 14/08/2019 10:42, Quentin Monnet wrote:
> 2019-08-13 18:51 UTC-0
On Wed, Aug 14, 2019 at 10:12 AM Quentin Monnet
wrote:
>
> 2019-08-14 09:58 UTC-0700 ~ Alexei Starovoitov
>
> > On Wed, Aug 14, 2019 at 9:45 AM Edward Cree wrote:
> >>
> >> On 14/08/2019 10:42, Quentin Monnet wrote:
> >>> 2019-08-13 18:51 UTC-0700 ~ Alexei Starovoitov
> >>>
> The same can
On 14/08/2019 17:58, Quentin Monnet wrote:
> 2019-08-14 17:45 UTC+0100 ~ Edward Cree
>> This might be a really dumb suggestion, but: you're wanting to collect a
>> summary statistic over an in-kernel data structure in a single syscall,
>> because making a series of syscalls to examine every entr
2019-08-14 09:58 UTC-0700 ~ Alexei Starovoitov
> On Wed, Aug 14, 2019 at 9:45 AM Edward Cree wrote:
>>
>> On 14/08/2019 10:42, Quentin Monnet wrote:
>>> 2019-08-13 18:51 UTC-0700 ~ Alexei Starovoitov
>>>
The same can be achieved by 'bpftool map dump|grep key|wc -l', no?
>>> To some extent (
2019-08-14 17:45 UTC+0100 ~ Edward Cree
> On 14/08/2019 10:42, Quentin Monnet wrote:
>> 2019-08-13 18:51 UTC-0700 ~ Alexei Starovoitov
>>
>>> The same can be achieved by 'bpftool map dump|grep key|wc -l', no?
>> To some extent (with subtleties for some other map types); and we use a
>> similar co
On Wed, Aug 14, 2019 at 9:45 AM Edward Cree wrote:
>
> On 14/08/2019 10:42, Quentin Monnet wrote:
> > 2019-08-13 18:51 UTC-0700 ~ Alexei Starovoitov
> >
> >> The same can be achieved by 'bpftool map dump|grep key|wc -l', no?
> > To some extent (with subtleties for some other map types); and we us
On 14/08/2019 10:42, Quentin Monnet wrote:
> 2019-08-13 18:51 UTC-0700 ~ Alexei Starovoitov
>
>> The same can be achieved by 'bpftool map dump|grep key|wc -l', no?
> To some extent (with subtleties for some other map types); and we use a
> similar command line as a workaround for now. But because
2019-08-13 18:51 UTC-0700 ~ Alexei Starovoitov
> On Tue, Aug 13, 2019 at 02:09:18PM +0100, Quentin Monnet wrote:
>> This series adds a "bpftool map count" subcommand to count the number of
>> entries present in a BPF map. This results from a customer request for a
>> tool to count the number of en
On Tue, Aug 13, 2019 at 02:09:18PM +0100, Quentin Monnet wrote:
> This series adds a "bpftool map count" subcommand to count the number of
> entries present in a BPF map. This results from a customer request for a
> tool to count the number of entries in BPF maps used in production (for
> example,
This series adds a "bpftool map count" subcommand to count the number of
entries present in a BPF map. This results from a customer request for a
tool to count the number of entries in BPF maps used in production (for
example, to know how many free entries are left in a given map).
The first two c
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