e in another machine that has 256GB of
local DRAM and 96GB of CXL memory. The performance slowdown is reduced
from 20~24% for "default" to 5~7% for "DAMON 2-tier".
Having these DAMOS_DEMOTE and DAMOS_PROMOTE actions can make 2-tier
memory systems run more efficiently under high me
changes applied.
Signed-off-by: Honggyu Kim
---
mm/vmscan.c | 18 --
1 file changed, 12 insertions(+), 6 deletions(-)
diff --git a/mm/vmscan.c b/mm/vmscan.c
index bba207f41b14..7ca2396ccc3b 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -2107,15 +2107,16 @@ static unsigned int
From: Hyeongtak Ji
This patch adds next_promotion_node that can be used to identify the
appropriate promotion target based on memory tiers. When multiple
promotion target nodes are available, the nearest node is selected based
on numa distance.
Signed-off-by: Hyeongtak Ji
---
include/linux/me
do_demote_folio_list
-> __demote_folio_list
-> demote_folio_list
__demote_folio_list() is a minimized version of shrink_folio_list(), but
it's minified only for demotion.
Signed-off-by: Honggyu Kim
---
include/linux/damon.h| 2 +
mm/damon/paddr.c | 17 +---
mm/damon/sysfs
-> __promote_folio_list
-> promote_folio_list
Signed-off-by: Hyeongtak Ji
Signed-off-by: Honggyu Kim
---
include/linux/damon.h | 2 +
include/linux/migrate_mode.h | 1 +
include/linux/vm_event_item.h | 1 +
include/trace/events/migrate.h | 3 +-
mm/damon/paddr.c
Hi SeongJae,
Thanks very much for your comments in details.
On Tue, 16 Jan 2024 12:31:59 -0800 SeongJae Park wrote:
> Thank you so much for this great patches and the above nice test results. I
> believe the test setup and results make sense, and merging a revised version
> of
> this patchset
This is a preparation patch that introduces migration modes.
The damon_pa_pageout is renamed to damon_pa_migrate and it receives an
extra argument for migration_mode.
No functional changes applied.
Signed-off-by: Honggyu Kim
---
mm/damon/paddr.c | 18 +++---
1 file changed, 15
e in another machine that has 256GB of
local DRAM and 96GB of CXL memory. The performance slowdown is reduced
from 20~24% for "default" to 5~7% for "DAMON 2-tier".
Having these DAMOS_DEMOTE and DAMOS_PROMOTE actions can make 2-tier
memory systems run more efficiently under high me
The alloc_demote_folio can be used out of vmscan.c so it'd be better to
remove static keyword from it.
This function can also be used for both demotion and promotion so it'd
be better to rename it from alloc_demote_folio to alloc_migrate_folio.
Signed-off-by: Honggyu Kim
---
mm/inter
shrink_folio_list(), but it's minified only for demotion.
Signed-off-by: Honggyu Kim
Signed-off-by: Hyeongtak Ji
---
include/linux/damon.h| 2 +
mm/damon/paddr.c | 222 ++-
mm/damon/sysfs-schemes.c | 1 +
3 files changed, 224 insertions(
From: Hyeongtak Ji
This patch adds next_promotion_node that can be used to identify the
appropriate promotion target based on memory tiers. When multiple
promotion target nodes are available, the nearest node is selected based
on numa distance.
Signed-off-by: Hyeongtak Ji
---
include/linux/me
From: Hyeongtak Ji
This patch introduces DAMOS_PROMOTE action for paddr mode.
It includes renaming alloc_demote_folio to alloc_migrate_folio to use it
for promotion as well.
Signed-off-by: Hyeongtak Ji
Signed-off-by: Honggyu Kim
---
include/linux/damon.h | 2 ++
include/linux
ned-off-by: Hyeongtak Ji
Signed-off-by: Honggyu Kim
---
mm/damon/paddr.c | 27 +--
1 file changed, 17 insertions(+), 10 deletions(-)
diff --git a/mm/damon/paddr.c b/mm/damon/paddr.c
index 37a7b34a36dd..5e057a69464f 100644
--- a/mm/damon/paddr.c
+++ b/mm/damon/paddr.c
From: Hyeongtak Ji
This patch adds target_nid under
/sys/kernel/mm/damon/admin/kdamonds//contexts//schemes/
target_nid can be used as the destination node for DAMOS actions such as
DAMOS_DEMOTE or DAMOS_PROMOTE in the future.
Signed-off-by: Hyeongtak Ji
Signed-off-by: Honggyu Kim
>
> > On Mon, 26 Feb 2024 23:05:46 +0900 Honggyu Kim wrote:
> >
> > > There was an RFC IDEA "DAMOS-based Tiered-Memory Management" previously
> > > posted at [1].
> > >
> > > It says there is no implementation of the demote/prom
; Sent: Tuesday, March 12, 2024 3:33 AM
> > > To: Honggyu Kim
> > > Cc: SeongJae Park ; kernel_team
> > > Subject: RE: Re: [RFC PATCH v2 0/7] DAMON based 2-tier memory management
> > > for CXL memory
> > >
> > > Hi Honggyu,
> > >
> &
Hi SeongJae,
On Sun, 17 Mar 2024 08:31:44 -0700 SeongJae Park wrote:
> Hi Honggyu,
>
> On Sun, 17 Mar 2024 17:36:29 +0900 Honggyu Kim wrote:
>
> > Hi SeongJae,
> >
> > Thanks for the confirmation. I have a few comments on young filter so
> > p
Hi SeongJae,
On Sun, 17 Mar 2024 12:13:57 -0700 SeongJae Park wrote:
> On Sun, 17 Mar 2024 08:31:44 -0700 SeongJae Park wrote:
>
> > Hi Honggyu,
> >
> > On Sun, 17 Mar 2024 17:36:29 +0900 Honggyu Kim wrote:
> >
> > > Hi SeongJae,
> > >
Hi SeongJae,
On Mon, 18 Mar 2024 12:07:21 -0700 SeongJae Park wrote:
> On Mon, 18 Mar 2024 22:27:45 +0900 Honggyu Kim wrote:
>
> > Hi SeongJae,
> >
> > On Sun, 17 Mar 2024 08:31:44 -0700 SeongJae Park wrote:
> > > Hi Honggyu,
> > >
> > > On
Hi SeongJae,
On Wed, 20 Mar 2024 09:56:19 -0700 SeongJae Park wrote:
> Hi Honggyu,
>
> On Wed, 20 Mar 2024 16:07:48 +0900 Honggyu Kim wrote:
>
> > Hi SeongJae,
> >
> > On Mon, 18 Mar 2024 12:07:21 -0700 SeongJae Park wrote:
> > > On Mon, 18 Mar
Hi SeongJae,
On Tue, 27 Feb 2024 15:51:20 -0800 SeongJae Park wrote:
> On Mon, 26 Feb 2024 23:05:46 +0900 Honggyu Kim wrote:
>
> > There was an RFC IDEA "DAMOS-based Tiered-Memory Management" previously
> > posted at [1].
> >
> > It says there is no im
Hi SeongJae,
On Fri, 22 Mar 2024 09:32:23 -0700 SeongJae Park wrote:
> On Fri, 22 Mar 2024 18:02:23 +0900 Honggyu Kim wrote:
>
> > Hi SeongJae,
> >
> > On Tue, 27 Feb 2024 15:51:20 -0800 SeongJae Park wrote:
> > > On Mon, 26 Feb 2024 23:05:46 +0900 Honggyu
ory policy from 17~18% to 4~5% when the system runs with
high memory pressure on its fast tier DRAM nodes.
Having these DAMOS_MIGRATE_HOT and DAMOS_MIGRATE_COLD actions can make
tiered memory systems run more efficiently under high memory pressures.
Signed-off-by: Honggyu Kim
Signed-off-by: H
The alloc_demote_folio can be used out of vmscan.c so it'd be better to
remove static keyword from it.
This function can also be used for both demotion and promotion so it'd
be better to rename it from alloc_demote_folio to alloc_migrate_folio.
Signed-off-by: Honggyu Kim
---
mm/inter
This is a preparation patch that introduces migration modes.
The damon_pa_pageout is renamed to damon_pa_migrate and it receives an
extra argument for migration_mode.
No functional changes applied.
Signed-off-by: Honggyu Kim
---
mm/damon/paddr.c | 18 +++---
1 file changed, 15
From: Hyeongtak Ji
This patch adds target_nid under
/sys/kernel/mm/damon/admin/kdamonds//contexts//schemes//
The 'target_nid' can be used as the destination node for DAMOS actions
such as DAMOS_MIGRATE_{HOT,COLD} in the follow up patches.
Signed-off-by: Hyeongtak Ji
Signed-off-b
The current patch series introduces DAMON based migration across NUMA
nodes so it'd be better to have a new migrate_reason in trace events.
Signed-off-by: Honggyu Kim
---
include/linux/migrate_mode.h | 1 +
include/trace/events/migrate.h | 3 ++-
2 files changed, 3 insertions(+), 1 del
old.
damon_pa_migrate_folio_list() is a minimized version of
shrink_folio_list(), but it's minified only for demotion.
Signed-off-by: Honggyu Kim
Signed-off-by: Hyeongtak Ji
---
include/linux/damon.h| 2 +
mm/damon/paddr.c | 146 ++-
mm/damon/s
This patch adds "damon_migrate_{hot,cold}" under node specific vmstat
counters at the following location.
/sys/devices/system/node/node*/vmstat
The counted values are accumulcated to the global vmstat so it also
introduces the same counter at /proc/vmstat as well.
Signed-off-by: H
MBs)
PID Node 0 Node 1 Node 2 Total
-- -- -- -- -
701 (hot_cold) 501 0601 1101
Signed-off-by: Hyeongtak Ji
Signed-off-by: Honggyu Kim
---
include/linux/damon.h| 2 ++
mm/damon/paddr.c | 12 ++--
mm/damon/sysfs-scheme
Hi SeongJae,
On Tue, 26 Mar 2024 16:03:09 -0700 SeongJae Park wrote:
> On Mon, 25 Mar 2024 15:53:03 -0700 SeongJae Park wrote:
>
> > On Mon, 25 Mar 2024 21:01:04 +0900 Honggyu Kim wrote:
> [...]
> > > On Fri, 22 Mar 2024 09:32:23 -0700 SeongJae Park wrote:
> >
Hi SeongJae,
On Fri, 5 Apr 2024 12:28:00 -0700 SeongJae Park wrote:
> Hello Honggyu,
>
> On Fri, 5 Apr 2024 15:08:49 +0900 Honggyu Kim wrote:
>
> > There was an RFC IDEA "DAMOS-based Tiered-Memory Management" previously
> > posted at [1].
> >
>
On Fri, 5 Apr 2024 12:24:30 -0700 SeongJae Park wrote:
> On Fri, 5 Apr 2024 15:08:54 +0900 Honggyu Kim wrote:
>
> > This patch introduces DAMOS_MIGRATE_COLD action, which is similar to
> > DAMOS_PAGEOUT, but migrate folios to the given 'target_nid' in the sysfs
Hi Gregory,
On Fri, 5 Apr 2024 12:56:14 -0400 Gregory Price
wrote:
> On Fri, Apr 05, 2024 at 03:08:49PM +0900, Honggyu Kim wrote:
> > There was an RFC IDEA "DAMOS-based Tiered-Memory Management" previously
> > posted at [1].
> >
> > 1. YCSB zi
Hi SeongJae,
On Mon, 8 Apr 2024 10:52:28 -0700 SeongJae Park wrote:
> On Mon, 8 Apr 2024 21:06:44 +0900 Honggyu Kim wrote:
>
> > On Fri, 5 Apr 2024 12:24:30 -0700 SeongJae Park wrote:
> > > On Fri, 5 Apr 2024 15:08:54 +0900 Honggyu Kim wrote:
> [...]
> >
On Mon, 8 Apr 2024 22:41:04 +0900 Honggyu Kim wrote:
[...]
> To explain this, I better share more test results. In the section of
> "Evaluation Workload", the test sequence can be summarized as follows.
>
> *. "Turn on DAMON."
> 1. Allocate cold memory(m
Hi SeongJae,
Thanks very much for your work! It got delayed due to the priority
changes in my workplace for building another heterogeneous memory
allocator.
https://github.com/skhynix/hmsdk/wiki/hmalloc
On Sun, 12 May 2024 10:54:42 -0700 SeongJae Park wrote:
> There was an RFC IDEA "DAMOS-based
nabled".
In summary, the evaluation results show that DAMON memory management
with DAMOS_MIGRATE_{HOT,COLD} actions reduces the performance slowdown
compared to the "default" memory policy from 11% to 3~5% when the system
runs with high memory pressure on its fast tier DRAM nodes.
H
The current patch series introduces DAMON based migration across NUMA
nodes so it'd be better to have a new migrate_reason in trace events.
Signed-off-by: Honggyu Kim
Reviewed-by: SeongJae Park
Signed-off-by: SeongJae Park
---
include/linux/migrate_mode.h | 1 +
include/trace/e
This patch adds damon description for "migrate_hot" and "migrate_cold"
actions for both usage and design documents as long as a new
"target_nid" knob to set the migration target node.
Signed-off-by: Honggyu Kim
---
Documentation/admin-guide/mm/damon/usage.rst
The alloc_demote_folio can be used out of vmscan.c so it'd be better to
remove static keyword from it.
Signed-off-by: Honggyu Kim
Reviewed-by: SeongJae Park
Signed-off-by: SeongJae Park
---
mm/internal.h | 1 +
mm/vmscan.c | 3 +--
2 files changed, 2 insertions(+), 2 deletions(-)
From: Hyeongtak Ji
This patch adds target_nid under
/sys/kernel/mm/damon/admin/kdamonds//contexts//schemes//
The 'target_nid' can be used as the destination node for DAMOS actions
such as DAMOS_MIGRATE_{HOT,COLD} in the follow up patches.
Signed-off-by: Hyeongtak Ji
Signed-off-b
The alloc_demote_folio can also be used for general migration including
both demotion and promotion so it'd be better to rename it from
alloc_demote_folio to alloc_migrate_folio.
Signed-off-by: Honggyu Kim
---
mm/internal.h | 2 +-
mm/vmscan.c | 4 ++--
2 files changed, 3 insertions(
e_folio_list() is a minimized version of
shrink_folio_list().
Signed-off-by: Honggyu Kim
Signed-off-by: Hyeongtak Ji
Signed-off-by: SeongJae Park
---
include/linux/damon.h| 2 +
mm/damon/paddr.c | 154 +++
mm/damon/sysfs-schemes.c | 1 +
3 files changed,
The alloc_demote_folio can also be used for general migration including
both demotion and promotion so it'd be better to rename it from
alloc_demote_folio to alloc_migrate_folio.
Signed-off-by: Honggyu Kim
---
mm/internal.h | 2 +-
mm/vmscan.c | 4 ++--
2 files changed, 3 insertions(
The alloc_demote_folio can be used out of vmscan.c so it'd be better to
remove static keyword from it.
Signed-off-by: Honggyu Kim
Reviewed-by: SeongJae Park
Signed-off-by: SeongJae Park
---
mm/internal.h | 1 +
mm/vmscan.c | 3 +--
2 files changed, 2 insertions(+), 2 deletions(-)
From: Hyeongtak Ji
This patch adds target_nid under
/sys/kernel/mm/damon/admin/kdamonds//contexts//schemes//
The 'target_nid' can be used as the destination node for DAMOS actions
such as DAMOS_MIGRATE_{HOT,COLD} in the follow up patches.
Signed-off-by: Hyeongtak Ji
Signed-off-b
nabled".
In summary, the evaluation results show that DAMON memory management
with DAMOS_MIGRATE_{HOT,COLD} actions reduces the performance slowdown
compared to the "default" memory policy from 11% to 3~5% when the system
runs with high memory pressure on its fast tier DRAM nodes.
H
"lru_prio" and "lru_deprio" are missing in the damos action list so they
have to be added properly at damon usage document.
Signed-off-by: Honggyu Kim
---
Documentation/admin-guide/mm/damon/usage.rst | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a
Node 0 Node 1 Node 2 Total
-- -- -- -- -
701 (hot_cold) 501 0601 1101
Signed-off-by: Hyeongtak Ji
Signed-off-by: Honggyu Kim
Signed-off-by: SeongJae Park
---
include/linux/damon.h| 2 ++
mm/damon/paddr.c | 3 +++
mm/damon/sysfs-sc
The current patch series introduces DAMON based migration across NUMA
nodes so it'd be better to have a new migrate_reason in trace events.
Signed-off-by: Honggyu Kim
Reviewed-by: SeongJae Park
Signed-off-by: SeongJae Park
---
include/linux/migrate_mode.h | 1 +
include/trace/e
e_folio_list() is a minimized version of
shrink_folio_list().
Signed-off-by: Honggyu Kim
Signed-off-by: Hyeongtak Ji
Signed-off-by: SeongJae Park
---
include/linux/damon.h| 2 +
mm/damon/paddr.c | 154 +++
mm/damon/sysfs-schemes.c | 1 +
3 files changed,
On Thu, 13 Jun 2024 22:17:31 +0900 Honggyu Kim wrote:
> There was an RFC IDEA "DAMOS-based Tiered-Memory Management" previously
> posted at [1].
>
> It says there is no implementation of the demote/promote DAMOS action
> are made. This patch series is about its im
emory policy from 11% to 3~5% when the system
runs with high memory pressure on its fast tier DRAM nodes.
Having these DAMOS_MIGRATE_HOT and DAMOS_MIGRATE_COLD actions can make
tiered memory systems run more efficiently under high memory pressures.
Signed-off-by: Honggyu Kim
Signed-off-by: Hyeongt
The alloc_demote_folio can be used out of vmscan.c so it'd be better to
remove static keyword from it.
Signed-off-by: Honggyu Kim
Reviewed-by: SeongJae Park
Signed-off-by: SeongJae Park
---
mm/internal.h | 1 +
mm/vmscan.c | 3 +--
2 files changed, 2 insertions(+), 2 deletions(-)
The alloc_demote_folio can also be used for general migration including
both demotion and promotion so it'd be better to rename it from
alloc_demote_folio to alloc_migrate_folio.
Signed-off-by: Honggyu Kim
Reviewed-by: SeongJae Park
---
mm/internal.h | 2 +-
mm/vmscan.c | 4 ++--
2
From: Hyeongtak Ji
This patch adds target_nid under
/sys/kernel/mm/damon/admin/kdamonds//contexts//schemes//
The 'target_nid' can be used as the destination node for DAMOS actions
such as DAMOS_MIGRATE_{HOT,COLD} in the follow up patches.
Signed-off-by: Hyeongtak Ji
Signed-off-b
The current patch series introduces DAMON based migration across NUMA
nodes so it'd be better to have a new migrate_reason in trace events.
Signed-off-by: Honggyu Kim
Reviewed-by: SeongJae Park
Signed-off-by: SeongJae Park
---
include/linux/migrate_mode.h | 1 +
include/trace/e
Node 0 Node 1 Node 2 Total
-- -- -- -- -
701 (hot_cold) 501 0601 1101
Signed-off-by: Hyeongtak Ji
Signed-off-by: Honggyu Kim
Signed-off-by: SeongJae Park
---
include/linux/damon.h| 2 ++
mm/damon/paddr.c | 3 +++
mm/damon/sysfs-sc
e_folio_list() is a minimized version of
shrink_folio_list().
Signed-off-by: Honggyu Kim
Signed-off-by: Hyeongtak Ji
Signed-off-by: SeongJae Park
---
include/linux/damon.h| 2 +
mm/damon/paddr.c | 154 +++
mm/damon/sysfs-schemes.c | 1 +
3 files changed,
This patch adds damon description for "migrate_hot" and "migrate_cold"
actions for both usage and design documents as long as a new
"target_nid" knob to set the migration target node.
Signed-off-by: Honggyu Kim
---
Documentation/admin-guide/mm/damon/usage.rst |
Hi SeongJae,
On Thu, 13 Jun 2024 10:46:04 -0700 SeongJae Park wrote:
> Hi Honggyu,
>
> On Thu, 13 Jun 2024 22:20:47 +0900 Honggyu Kim wrote:
>
> > There was an RFC IDEA "DAMOS-based Tiered-Memory Management" previously
> > posted at [1].
> >
>
Since current traceevent somehow does not have an optimization flag,
this patch just adds -O2 to optimize its code.
Signed-off-by: Honggyu Kim
---
tools/lib/traceevent/Makefile | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/lib/traceevent/Makefile b/tools/lib
Since asprintf generates a compiler warning when its return value is not
not properly handled, this patch checks that asprintf call is successful
or not.
Signed-off-by: Honggyu Kim
---
tools/lib/traceevent/parse-filter.c | 29 +++--
1 file changed, 19 insertions(+), 10
used uninitialized in this
function [-Wmaybe-uninitialized]
kbuf->next = kbuf->index + length;
^
kbuffer-parse.c:297:15: note: ‘length’ was declared here
unsigned int length;
^
Signed-off-by: Honggyu Kim
---
tools/lib/traceevent/even
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