From: Reinette Chatre <reinette.chatre@intel.com>
To: James Morse <james.morse@arm.com>,
x86@kernel.org, linux-kernel@vger.kernel.org
Cc: Fenghua Yu <fenghua.yu@intel.com>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
shameerali.kolothum.thodi@huawei.com,
Jamie Iles <jamie@nuviainc.com>,
D Scott Phillips OS <scott@os.amperecomputing.com>
Subject: Re: [PATCH 02/24] x86/resctrl: Split struct rdt_domain
Date: Tue, 17 Nov 2020 11:22:08 -0800 [thread overview]
Message-ID: <768d3fe3-336f-70d6-d406-1d3f25b7f3bf@intel.com> (raw)
In-Reply-To: <20201030161120.227225-3-james.morse@arm.com>
Hi James,
On 10/30/2020 9:10 AM, James Morse wrote:
> resctrl is the defacto Linux ABI for SoC resource partitioning features.
> To support it on another architecture, it needs to be abstracted from
> Intel RDT, and moved it to /fs/.
Same comments as previous patch regarding "Intel RDT" and "moved it to"
>
> Split struct rdt_domain up too. Move everything that that is particular
s/that that/that/
> to resctrl into a new header file. resctrl code paths touching a 'hw'
> struct indicates where an abstraction is needed.
>
> No change in behaviour, this patch just moves types around.
Please remove the "this patch" term.
>
> Signed-off-by: James Morse <james.morse@arm.com>
> ---
> arch/x86/kernel/cpu/resctrl/core.c | 32 +++++++++++-------
> arch/x86/kernel/cpu/resctrl/ctrlmondata.c | 10 ++++--
> arch/x86/kernel/cpu/resctrl/internal.h | 40 +++++------------------
> arch/x86/kernel/cpu/resctrl/monitor.c | 8 +++--
> arch/x86/kernel/cpu/resctrl/rdtgroup.c | 29 ++++++++++------
> include/linux/resctrl.h | 35 +++++++++++++++++++-
> 6 files changed, 94 insertions(+), 60 deletions(-)
>
...
> diff --git a/arch/x86/kernel/cpu/resctrl/internal.h b/arch/x86/kernel/cpu/resctrl/internal.h
> index bcae86138cad..f7aab9245259 100644
> --- a/arch/x86/kernel/cpu/resctrl/internal.h
> +++ b/arch/x86/kernel/cpu/resctrl/internal.h
> @@ -299,44 +299,22 @@ struct mbm_state {
> };
>
> /**
> - * struct rdt_domain - group of cpus sharing an RDT resource
> - * @list: all instances of this resource
> - * @id: unique id for this instance
> - * @cpu_mask: which cpus share this resource
> - * @rmid_busy_llc:
> - * bitmap of which limbo RMIDs are above threshold
> - * @mbm_total: saved state for MBM total bandwidth
> - * @mbm_local: saved state for MBM local bandwidth
> - * @mbm_over: worker to periodically read MBM h/w counters
> - * @cqm_limbo: worker to periodically read CQM h/w counters
> - * @mbm_work_cpu:
> - * worker cpu for MBM h/w counters
> - * @cqm_work_cpu:
> - * worker cpu for CQM h/w counters
> + * struct rdt_hw_domain - group of cpus sharing an RDT resource
s/RDT/resctrl/?
Even so, looking ahead, struct rdt_hw_domain and struct rdt_domain are
receiving duplicate descriptions that needs to be adjusted.
Also, CPU is preferred instead of cpu. I understand that in some cases
you copy existing usage and I am actually not sure if this would be
insisted upon when going to the next level of review. Since these are
comments changing it does seem like a good time to use preferred term.
> + * @resctrl: Properties exposed to the resctrl file system
Please use tabs and spaces consistently.
> * @ctrl_val: array of cache or mem ctrl values (indexed by CLOSID)
> * @mbps_val: When mba_sc is enabled, this holds the bandwidth in MBps
> - * @new_ctrl: new ctrl value to be loaded
> - * @have_new_ctrl: did user provide new_ctrl for this domain
> - * @plr: pseudo-locked region (if any) associated with domain
> */
> -struct rdt_domain {
> - struct list_head list;
> - int id;
> - struct cpumask cpu_mask;
> - unsigned long *rmid_busy_llc;
> - struct mbm_state *mbm_total;
> - struct mbm_state *mbm_local;
> - struct delayed_work mbm_over;
> - struct delayed_work cqm_limbo;
> - int mbm_work_cpu;
> - int cqm_work_cpu;
> +struct rdt_hw_domain {
> + struct rdt_domain resctrl;
> u32 *ctrl_val;
> u32 *mbps_val;
> - u32 new_ctrl;
> - bool have_new_ctrl;
> - struct pseudo_lock_region *plr;
> };
>
> +static inline struct rdt_hw_domain *resctrl_to_arch_dom(struct rdt_domain *r)
> +{
> + return container_of(r, struct rdt_hw_domain, resctrl);
> +}
> +
> /**
> * struct msr_param - set a range of MSRs from a domain
> * @res: The resource to use
...
> diff --git a/include/linux/resctrl.h b/include/linux/resctrl.h
> index b2c2b7386d28..f5af59b8f2a9 100644
> --- a/include/linux/resctrl.h
> +++ b/include/linux/resctrl.h
> @@ -15,7 +15,40 @@ int proc_resctrl_show(struct seq_file *m,
>
> #endif
>
> -struct rdt_domain;
> +/**
> + * struct rdt_domain - group of cpus sharing an RDT resource
Duplicate description here (same as rdt_hw_domain). Please use CPUs
instead and resctrl instead of RDT.
> + * @list: all instances of this resource
> + * @id: unique id for this instance
> + * @cpu_mask: which cpus share this resource
> + * @new_ctrl: new ctrl value to be loaded
> + * @have_new_ctrl: did user provide new_ctrl for this domain
> + * @rmid_busy_llc: bitmap of which limbo RMIDs are above threshold
> + * @mbm_total: saved state for MBM total bandwidth
> + * @mbm_local: saved state for MBM local bandwidth
> + * @mbm_over: worker to periodically read MBM h/w counters
> + * @cqm_limbo: worker to periodically read CQM h/w counters
> + * @mbm_work_cpu: worker cpu for MBM h/w counters
> + * @cqm_work_cpu: worker cpu for CQM h/w counters
> + * @plr: pseudo-locked region (if any) associated with domain
> + */
The above usages of cpu is what I considered earlier. I know that the
x86 area prefers CPU but I also understand that you are just copying
existing comments. I do not know if the x86 maintainers would require a
change to CPU at this time but it seems like a good time to transition.
> +struct rdt_domain {
> + struct list_head list;
> + int id;
> + struct cpumask cpu_mask;
> +
> + u32 new_ctrl;
> + bool have_new_ctrl;
> +
> + unsigned long *rmid_busy_llc;
> + struct mbm_state *mbm_total;
> + struct mbm_state *mbm_local;
> + struct delayed_work mbm_over;
> + struct delayed_work cqm_limbo;
> + int mbm_work_cpu;
> + int cqm_work_cpu;
> +
> + struct pseudo_lock_region *plr;
> +};
>
Please remove the empty lines.
> /**
> * struct resctrl_cache - Cache allocation related data
>
Reinette
next prev parent reply other threads:[~2020-11-17 19:22 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-30 16:10 [PATCH 00/24] x86/resctrl: Merge the CDP resources James Morse
2020-10-30 16:10 ` [PATCH 01/24] x86/resctrl: Split struct rdt_resource James Morse
2020-11-17 19:20 ` Reinette Chatre
2021-03-12 17:10 ` James Morse
2020-10-30 16:10 ` [PATCH 02/24] x86/resctrl: Split struct rdt_domain James Morse
2020-11-17 19:22 ` Reinette Chatre [this message]
2020-10-30 16:10 ` [PATCH 03/24] x86/resctrl: Add resctrl_arch_get_num_closid() James Morse
2020-11-17 19:57 ` Reinette Chatre
2021-03-12 17:10 ` James Morse
2020-10-30 16:11 ` [PATCH 04/24] x86/resctrl: Add a separate schema list for resctrl James Morse
2020-11-17 21:29 ` Reinette Chatre
2021-03-12 17:10 ` James Morse
2020-10-30 16:11 ` [PATCH 05/24] x86/resctrl: Pass the schema in resdir's private pointer James Morse
2020-11-17 21:49 ` Reinette Chatre
2021-03-12 17:11 ` James Morse
2020-10-30 16:11 ` [PATCH 06/24] x86/resctrl: Store the effective num_closid in the schema James Morse
2020-11-17 22:04 ` Reinette Chatre
2021-03-12 17:13 ` James Morse
2020-10-30 16:11 ` [PATCH 07/24] x86/resctrl: Label the resources with their configuration type James Morse
2020-11-17 22:30 ` Reinette Chatre
2021-03-12 17:36 ` James Morse
2020-10-30 16:11 ` [PATCH 08/24] x86/resctrl: Walk the resctrl schema list instead of an arch list James Morse
2020-11-17 22:52 ` Reinette Chatre
2021-03-12 17:37 ` James Morse
2020-10-30 16:11 ` [PATCH 09/24] x86/resctrl: Change rdt_resource to resctrl_schema in pseudo_lock_region James Morse
2020-10-30 16:11 ` [PATCH 10/24] x86/resctrl: Move the schema names into struct resctrl_schema James Morse
2020-11-10 11:39 ` Jamie Iles
2020-11-11 18:11 ` James Morse
2020-11-17 23:11 ` Reinette Chatre
2021-03-12 17:38 ` James Morse
2020-10-30 16:11 ` [PATCH 11/24] x86/resctrl: Group staged configuration into a separate struct James Morse
2020-11-17 23:28 ` Reinette Chatre
2021-03-12 17:41 ` James Morse
2020-10-30 16:11 ` [PATCH 12/24] x86/resctrl: Add closid to the staged config James Morse
2020-11-17 23:46 ` Reinette Chatre
2021-03-12 17:43 ` James Morse
2020-10-30 16:11 ` [PATCH 13/24] x86/resctrl: Allow different CODE/DATA configurations to be staged James Morse
2020-11-18 0:30 ` Reinette Chatre
2020-10-30 16:11 ` [PATCH 14/24] x86/resctrl: Make update_domains() learn the affected closids James Morse
2020-10-30 16:11 ` [PATCH 15/24] x86/resctrl: Add a helper to read a closid's configuration James Morse
2020-10-30 16:11 ` [PATCH 16/24] x86/resctrl: Add a helper to read/set the CDP configuration James Morse
2020-10-30 16:11 ` [PATCH 17/24] x86/resctrl: Use cdp_enabled in rdt_domain_reconfigure_cdp() James Morse
2020-10-30 16:11 ` [PATCH 18/24] x86/resctrl: Pass configuration type to resctrl_arch_get_config() James Morse
2020-10-30 16:11 ` [PATCH 19/24] x86/resctrl: Make ctrlval arrays the same size James Morse
2020-10-30 16:11 ` [PATCH 20/24] x86/resctrl: Apply offset correction when config is staged James Morse
2020-10-30 16:11 ` [PATCH 21/24] x86/resctrl: Calculate the index from the configuration type James Morse
2020-10-30 16:11 ` [PATCH 22/24] x86/resctrl: Merge the ctrlval arrays James Morse
2020-10-30 16:11 ` [PATCH 23/24] x86/resctrl: Remove rdt_cdp_peer_get() James Morse
2020-10-30 16:11 ` [PATCH 24/24] x86/resctrl: Merge the CDP resources James Morse
2020-11-13 15:38 ` [PATCH 00/24] " Jamie Iles
2020-11-16 17:54 ` Reinette Chatre
2020-11-17 13:05 ` James Morse
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=768d3fe3-336f-70d6-d406-1d3f25b7f3bf@intel.com \
--to=reinette.chatre@intel.com \
--cc=bp@alien8.de \
--cc=fenghua.yu@intel.com \
--cc=james.morse@arm.com \
--cc=jamie@nuviainc.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@redhat.com \
--cc=scott@os.amperecomputing.com \
--cc=shameerali.kolothum.thodi@huawei.com \
--cc=tglx@linutronix.de \
--cc=x86@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).