reactor_run() decides whether to start gather_metrics
based on non-zero scheduler period.
The default of 1 sec was set during initialization,
in scheduler_subsystem_init().
This resulted in unessecary operations each second,
even if only 'static' scheduler is used.
This patch moves setting default scheduling period to
respective schedulers.
Signed-off-by: Tomasz Zawadzki <tomasz.zawadzki@intel.com>
Change-Id: I953aee271a959b6314c8e83434c922dba9638de4
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/9492
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Community-CI: Mellanox Build Bot
Reviewed-by: Konrad Sztyber <konrad.sztyber@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: Shuhei Matsumoto <smatsumoto@nvidia.com>
Many open source projects have moved to using SPDX identifiers
to specify license information, reducing the amount of
boilerplate code in every source file. This patch replaces
the bulk of SPDK .c, .cpp and Makefiles with the BSD-3-Clause
identifier.
Almost all of these files share the exact same license text,
and this patch only modifies the files that contain the
most common license text. There can be slight variations
because the third clause contains company names - most say
"Intel Corporation", but there are instances for Nvidia,
Samsung, Eideticom and even "the copyright holder".
Used a bash script to automate replacement of the license text
with SPDX identifier which is checked into scripts/spdx.sh.
Signed-off-by: Jim Harris <james.r.harris@intel.com>
Change-Id: Iaa88ab5e92ea471691dc298cfe41ebfb5d169780
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/12904
Community-CI: Broadcom CI <spdk-ci.pdl@broadcom.com>
Community-CI: Mellanox Build Bot
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Aleksey Marchuk <alexeymar@nvidia.com>
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-by: Dong Yi <dongx.yi@intel.com>
Reviewed-by: Konrad Sztyber <konrad.sztyber@intel.com>
Reviewed-by: Paul Luse <paul.e.luse@intel.com>
Reviewed-by: <qun.wan@intel.com>
Creates a JSON on scheduler side to return after .get_opts is called
and parses a JSON on .set_opts call.
The JSON passed to dynamic scheduler on .set_stats is a copy of a
pointer already available during RPC framework_set_scheduler call.
Getting and setting scheduler stats via RPC calls is going to be
implemented in the next patch in this series.
Change-Id: I62880a71066a140c74336a5725e7b10952008e5c
Signed-off-by: Krzysztof Karas <krzysztof.karas@intel.com>
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/11448
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Community-CI: Broadcom CI <spdk-ci.pdl@broadcom.com>
Community-CI: Mellanox Build Bot
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Tomasz Zawadzki <tomasz.zawadzki@intel.com>
Change dynamic scheduler parameters from #define to
global variables.
Change-Id: I5bbbf40ac66971bcc24fc8bf0ac5d13efdc7412f
Signed-off-by: Krzysztof Karas <krzysztof.karas@intel.com>
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/11447
Reviewed-by: Tomasz Zawadzki <tomasz.zawadzki@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Community-CI: Broadcom CI <spdk-ci.pdl@broadcom.com>
Community-CI: Mellanox Build Bot
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
This will allow runtime observation of the
dynamic scheduler in a release build.
Signed-off-by: Jim Harris <james.r.harris@intel.com>
Change-Id: I7436b5dbcaa0df1529f828ef75f4e9335a092893
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/9672
Community-CI: Broadcom CI <spdk-ci.pdl@broadcom.com>
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Reviewed-by: Tomasz Zawadzki <tomasz.zawadzki@intel.com>
_find_optimal_core was always consolidating idle threads to g_main_lcore.
Meanwhile for active threads lower lcore id were prioritized over the
higher ones.
So long as g_main_lcore can fit the active thread, it should be prioritized
over any other. Regardless of the lcore id.
Fix#2080
Signed-off-by: Tomasz Zawadzki <tomasz.zawadzki@intel.com>
Change-Id: I30b3a7353bcf243d4362b4db9dde5446c435d675
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/9243
Community-CI: Broadcom CI <spdk-ci.pdl@broadcom.com>
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
Rename it to _is_core_at_limit(). This function
currently returns true if the core is at the limit
(instead of over the limit) which is really the semantics
that we want - so just change the name of the function
to make it more precise.
Signed-off-by: Jim Harris <james.r.harris@intel.com>
Change-Id: Idf815f67c71463c3b98bc00211aafdc291abdbd2
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/9582
Community-CI: Broadcom CI <spdk-ci.pdl@broadcom.com>
Community-CI: Mellanox Build Bot
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Tomasz Zawadzki <tomasz.zawadzki@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
We have _is_core_over_limit() which determines if a core is
currently over its busy:total tsc ratio. We use this to determine
if we need to move threads off of a core that is too busy.
But when we pick a core to move a thread *to* we were allowing the
dst core to fill to 100%, rather than the SCHEDULER_CORE_LIMIT.
This patch fixes that, which has the nice effect of keeping
thread-to-core assignments much more stable when running
I/O workloads.
Signed-off-by: Jim Harris <james.r.harris@intel.com>
Change-Id: Id98b08803939d2a25104082e6436bb8d4727d7c2
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/9578
Community-CI: Broadcom CI <spdk-ci.pdl@broadcom.com>
Community-CI: Mellanox Build Bot
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: Tomasz Zawadzki <tomasz.zawadzki@intel.com>
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
This will lead the scheduler to be quicker to move
threads to an unused core - favoring performance over
power savings.
Signed-off-by: Jim Harris <james.r.harris@intel.com>
Change-Id: Ibaa5edc61a4bdca5550bd23a562c3645fded25e9
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/9551
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Community-CI: Broadcom CI <spdk-ci.pdl@broadcom.com>
Community-CI: Mellanox Build Bot
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: Tomasz Zawadzki <tomasz.zawadzki@intel.com>
If a core has a very high busy percentage, we should
not assume that moving a thread will gain that
thread's busy tsc as newly idle cycles for the
current core.
So if the current core's percentage is above
SCHEDULER_CORE_BUSY (95%), do not adjust the
current core's busy/idle tsc when moving a thread
off of it. If moving the thread does actually
result in some newly idle tsc, it will get adjusted
next scheduling period.
Signed-off-by: Jim Harris <james.r.harris@intel.com>
Change-Id: I26a0282cd8f8e821809289b80c979cf94335353d
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/9581
Community-CI: Broadcom CI <spdk-ci.pdl@broadcom.com>
Community-CI: Mellanox Build Bot
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Tomasz Zawadzki <tomasz.zawadzki@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
For the src thread, add the busy_tsc of the thread
we are moving to the idle_tsc of the current core.
This is consistent with how are accounting for the
cycles in the target core too.
We will disable the load_balancing.sh script for now.
We will reenable it later in this patch set once
a few other changes are made, along with some updates
to the load_balancing.sh script based on the changes
made in this patch set.
Signed-off-by: Jim Harris <james.r.harris@intel.com>
Change-Id: I8af82610804e97dabf62ccd90f75a0e6e37d276f
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/9550
Community-CI: Broadcom CI <spdk-ci.pdl@broadcom.com>
Community-CI: Mellanox Build Bot
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Tomasz Zawadzki <tomasz.zawadzki@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
This will be useful in some upcoming patches where we will
be calculating these percentages in more places.
Signed-off-by: Jim Harris <james.r.harris@intel.com>
Change-Id: If7d84c00fe1b666988fe06537836ba7b9cb161aa
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/9580
Community-CI: Broadcom CI <spdk-ci.pdl@broadcom.com>
Community-CI: Mellanox Build Bot
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
Reviewed-by: Tomasz Zawadzki <tomasz.zawadzki@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
This is similar to how we name other module library
directories.
Signed-off-by: Jim Harris <james.r.harris@intel.com>
Change-Id: Iadaf59231323180b48b5d0cf2e6acb3d8bfc9807
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/9549
Community-CI: Mellanox Build Bot
Community-CI: Broadcom CI <spdk-ci.pdl@broadcom.com>
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Tomasz Zawadzki <tomasz.zawadzki@intel.com>
Reviewed-by: Aleksey Marchuk <alexeymar@mellanox.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
