From: Tejun Heo <tj@kernel.org>
To: axboe@kernel.dk
Cc: linux-block@vger.kernel.org, cgroups@vger.kernel.org,
linux-kernel@vger.kernel.org, kernel-team@fb.com, newella@fb.com,
Tejun Heo <tj@kernel.org>
Subject: [PATCH 25/27] blk-iocost: restore inuse update tracepoints
Date: Tue, 1 Sep 2020 14:52:55 -0400 [thread overview]
Message-ID: <20200901185257.645114-26-tj@kernel.org> (raw)
In-Reply-To: <20200901185257.645114-1-tj@kernel.org>
Update and restore the inuse update tracepoints.
Signed-off-by: Tejun Heo <tj@kernel.org>
---
block/blk-iocost.c | 16 ++++++++++++++++
include/trace/events/iocost.h | 6 +++---
2 files changed, 19 insertions(+), 3 deletions(-)
diff --git a/block/blk-iocost.c b/block/blk-iocost.c
index 0270a504e6b5..9366527d8c12 100644
--- a/block/blk-iocost.c
+++ b/block/blk-iocost.c
@@ -1919,6 +1919,12 @@ static void transfer_surpluses(struct list_head *surpluses, struct ioc_now *now)
inuse = DIV64_U64_ROUND_UP(
parent->child_adjusted_sum * iocg->hweight_after_donation,
parent->hweight_inuse);
+
+ TRACE_IOCG_PATH(inuse_transfer, iocg, now,
+ iocg->inuse, inuse,
+ iocg->hweight_inuse,
+ iocg->hweight_after_donation);
+
__propagate_weights(iocg, iocg->active, inuse, true, now);
}
@@ -2076,6 +2082,10 @@ static void ioc_timer_fn(struct timer_list *timer)
iocg->hweight_after_donation = new_hwi;
list_add(&iocg->surplus_list, &surpluses);
} else {
+ TRACE_IOCG_PATH(inuse_shortage, iocg, &now,
+ iocg->inuse, iocg->active,
+ iocg->hweight_inuse, new_hwi);
+
__propagate_weights(iocg, iocg->active,
iocg->active, true, &now);
nr_shortages++;
@@ -2248,11 +2258,13 @@ static u64 adjust_inuse_and_calc_cost(struct ioc_gq *iocg, u64 vtime,
struct ioc *ioc = iocg->ioc;
struct ioc_margins *margins = &ioc->margins;
u32 adj_step = DIV_ROUND_UP(iocg->active * INUSE_ADJ_STEP_PCT, 100);
+ u32 __maybe_unused old_inuse = iocg->inuse, __maybe_unused old_hwi;
u32 hwi;
s64 margin;
u64 cost, new_inuse;
current_hweight(iocg, NULL, &hwi);
+ old_hwi = hwi;
cost = abs_cost_to_cost(abs_cost, hwi);
margin = now->vnow - vtime - cost;
@@ -2287,6 +2299,10 @@ static u64 adjust_inuse_and_calc_cost(struct ioc_gq *iocg, u64 vtime,
iocg->inuse != iocg->active);
spin_unlock_irq(&ioc->lock);
+
+ TRACE_IOCG_PATH(inuse_adjust, iocg, now,
+ old_inuse, iocg->inuse, old_hwi, hwi);
+
return cost;
}
diff --git a/include/trace/events/iocost.h b/include/trace/events/iocost.h
index ee024fe8fef6..b350860d2e71 100644
--- a/include/trace/events/iocost.h
+++ b/include/trace/events/iocost.h
@@ -95,7 +95,7 @@ DECLARE_EVENT_CLASS(iocg_inuse_update,
)
);
-DEFINE_EVENT(iocg_inuse_update, iocost_inuse_takeback,
+DEFINE_EVENT(iocg_inuse_update, iocost_inuse_shortage,
TP_PROTO(struct ioc_gq *iocg, const char *path, struct ioc_now *now,
u32 old_inuse, u32 new_inuse,
@@ -105,7 +105,7 @@ DEFINE_EVENT(iocg_inuse_update, iocost_inuse_takeback,
old_hw_inuse, new_hw_inuse)
);
-DEFINE_EVENT(iocg_inuse_update, iocost_inuse_giveaway,
+DEFINE_EVENT(iocg_inuse_update, iocost_inuse_transfer,
TP_PROTO(struct ioc_gq *iocg, const char *path, struct ioc_now *now,
u32 old_inuse, u32 new_inuse,
@@ -115,7 +115,7 @@ DEFINE_EVENT(iocg_inuse_update, iocost_inuse_giveaway,
old_hw_inuse, new_hw_inuse)
);
-DEFINE_EVENT(iocg_inuse_update, iocost_inuse_reset,
+DEFINE_EVENT(iocg_inuse_update, iocost_inuse_adjust,
TP_PROTO(struct ioc_gq *iocg, const char *path, struct ioc_now *now,
u32 old_inuse, u32 new_inuse,
--
2.26.2
next prev parent reply other threads:[~2020-09-01 18:55 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-01 18:52 [PATCHSET for-5.10/block] blk-iocost: iocost: improve donation, debt and excess handling Tejun Heo
2020-09-01 18:52 ` [PATCH 01/27] blk-iocost: ioc_pd_free() shouldn't assume irq disabled Tejun Heo
2020-09-01 18:52 ` [PATCH 02/27] blk-stat: make q->stats->lock irqsafe Tejun Heo
2020-09-01 18:52 ` [PATCH 03/27] blk-iocost: use local[64]_t for percpu stat Tejun Heo
2020-11-20 21:51 ` Stafford Horne
2020-11-20 22:13 ` Tejun Heo
2020-09-01 18:52 ` [PATCH 04/27] blk-iocost: rename propagate_active_weights() to propagate_weights() Tejun Heo
2020-09-01 18:52 ` [PATCH 05/27] blk-iocost: clamp inuse and skip noops in __propagate_weights() Tejun Heo
2020-09-01 18:52 ` [PATCH 06/27] blk-iocost: move iocg_kick_delay() above iocg_kick_waitq() Tejun Heo
2020-09-01 18:52 ` [PATCH 07/27] blk-iocost: make iocg_kick_waitq() call iocg_kick_delay() after paying debt Tejun Heo
2020-09-01 18:52 ` [PATCH 08/27] blk-iocost: s/HWEIGHT_WHOLE/WEIGHT_ONE/g Tejun Heo
2020-09-01 18:52 ` [PATCH 09/27] blk-iocost: use WEIGHT_ONE based fixed point number for weights Tejun Heo
2020-09-01 18:52 ` [PATCH 10/27] blk-iocost: make ioc_now->now and ioc->period_at 64bit Tejun Heo
2020-09-01 18:52 ` [PATCH 11/27] blk-iocost: streamline vtime margin and timer slack handling Tejun Heo
2020-09-01 18:52 ` [PATCH 12/27] blk-iocost: grab ioc->lock for debt handling Tejun Heo
2020-09-01 18:52 ` [PATCH 13/27] blk-iocost: add absolute usage stat Tejun Heo
2020-09-01 18:52 ` [PATCH 14/27] blk-iocost: calculate iocg->usages[] from iocg->local_stat.usage_us Tejun Heo
2020-09-01 18:52 ` [PATCH 15/27] blk-iocost: replace iocg->has_surplus with ->surplus_list Tejun Heo
2020-09-01 18:52 ` [PATCH 16/27] blk-iocost: decouple vrate adjustment from surplus transfers Tejun Heo
2020-09-01 18:52 ` [PATCH 17/27] blk-iocost: restructure surplus donation logic Tejun Heo
2020-09-01 18:52 ` [PATCH 18/27] blk-iocost: implement Andy's method for donation weight updates Tejun Heo
2020-09-01 18:52 ` [PATCH 19/27] blk-iocost: revamp donation amount determination Tejun Heo
2020-09-01 18:52 ` [PATCH 20/27] blk-iocost: revamp in-period donation snapbacks Tejun Heo
2020-09-01 18:52 ` [PATCH 21/27] blk-iocost: revamp debt handling Tejun Heo
2020-09-01 18:52 ` [PATCH 22/27] blk-iocost: implement delay adjustment hysteresis Tejun Heo
2020-09-01 18:52 ` [PATCH 23/27] blk-iocost: halve debts if device stays idle Tejun Heo
2020-09-01 18:52 ` [PATCH 24/27] blk-iocost: implement vtime loss compensation Tejun Heo
2020-09-01 18:52 ` Tejun Heo [this message]
2020-09-01 18:52 ` [PATCH 26/27] blk-iocost: add three debug stat - cost.wait, indebt and indelay Tejun Heo
2020-09-01 18:52 ` [PATCH 27/27] blk-iocost: update iocost_monitor.py Tejun Heo
2020-09-01 22:57 ` [PATCHSET for-5.10/block] blk-iocost: iocost: improve donation, debt and excess handling Jens Axboe
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