From: Peter Zijlstra <peterz@infradead.org>
To: Chengming Zhou <zhouchengming@bytedance.com>
Cc: hannes@cmpxchg.org, surenb@google.com, mingo@redhat.com,
tj@kernel.org, corbet@lwn.net, akpm@linux-foundation.org,
rdunlap@infradead.org, linux-doc@vger.kernel.org,
linux-kernel@vger.kernel.org, songmuchun@bytedance.com,
cgroups@vger.kernel.org
Subject: Re: [PATCH 9/9] sched/psi: add PSI_IRQ to track IRQ/SOFTIRQ pressure
Date: Wed, 27 Jul 2022 18:07:16 +0200 [thread overview]
Message-ID: <YuFitL6KuCfuqujn@worktop.programming.kicks-ass.net> (raw)
In-Reply-To: <20220721040439.2651-10-zhouchengming@bytedance.com>
On Thu, Jul 21, 2022 at 12:04:39PM +0800, Chengming Zhou wrote:
> diff --git a/include/linux/psi_types.h b/include/linux/psi_types.h
> index c124f7d186d0..195f123b1cd1 100644
> --- a/include/linux/psi_types.h
> +++ b/include/linux/psi_types.h
> @@ -47,7 +47,8 @@ enum psi_res {
> PSI_IO,
> PSI_MEM,
> PSI_CPU,
> - NR_PSI_RESOURCES = 3,
> + PSI_IRQ,
> + NR_PSI_RESOURCES = 4,
> };
>
> /*
> @@ -63,9 +64,11 @@ enum psi_states {
> PSI_MEM_FULL,
> PSI_CPU_SOME,
> PSI_CPU_FULL,
> + PSI_IRQ_SOME,
> + PSI_IRQ_FULL,
> /* Only per-CPU, to weigh the CPU in the global average: */
> PSI_NONIDLE,
> - NR_PSI_STATES = 7,
> + NR_PSI_STATES = 9,
> };
>
> enum psi_aggregators {
$ pahole -EC psi_group_cpu defconfig-build/kernel/sched/build_utility.o
struct psi_group_cpu {
/* typedef seqcount_t */ struct seqcount {
unsigned int sequence; /* 0 4 */
} seq __attribute__((__aligned__(64))); /* 0 4 */
unsigned int tasks[5]; /* 4 20 */
/* typedef u32 -> __u32 */ unsigned int state_mask; /* 24 4 */
/* typedef u32 -> __u32 */ unsigned int times[7]; /* 28 28 */
/* typedef u64 -> __u64 */ long long unsigned int state_start; /* 56 8 */
/* --- cacheline 1 boundary (64 bytes) --- */
/* typedef u32 -> __u32 */ unsigned int times_prev[2][7] __attribute__((__aligned__(64))); /* 64 56 */
/* size: 128, cachelines: 2, members: 6 */
/* padding: 8 */
/* forced alignments: 2 */
} __attribute__((__aligned__(64)));
$ pahole -EC psi_group_cpu defconfig-build/kernel/sched/build_utility.o
struct psi_group_cpu {
/* typedef seqcount_t */ struct seqcount {
unsigned int sequence; /* 0 4 */
} seq __attribute__((__aligned__(64))); /* 0 4 */
unsigned int tasks[5]; /* 4 20 */
/* typedef u32 -> __u32 */ unsigned int state_mask; /* 24 4 */
/* typedef u32 -> __u32 */ unsigned int times[9]; /* 28 36 */
/* --- cacheline 1 boundary (64 bytes) --- */
/* typedef u64 -> __u64 */ long long unsigned int state_start; /* 64 8 */
/* XXX 56 bytes hole, try to pack */
/* --- cacheline 2 boundary (128 bytes) --- */
/* typedef u32 -> __u32 */ unsigned int times_prev[2][9] __attribute__((__aligned__(64))); /* 128 72 */
/* size: 256, cachelines: 4, members: 6 */
/* sum members: 144, holes: 1, sum holes: 56 */
/* padding: 56 */
/* forced alignments: 2, forced holes: 1, sum forced holes: 56 */
} __attribute__((__aligned__(64)));
So yeah, I think not.
prev parent reply other threads:[~2022-07-27 16:07 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-07-21 4:04 [PATCH 0/9] sched/psi: some optimization and extension Chengming Zhou
2022-07-21 4:04 ` [PATCH 1/9] sched/psi: fix periodic aggregation shut off Chengming Zhou
2022-07-25 15:34 ` Johannes Weiner
2022-07-25 15:39 ` Johannes Weiner
2022-07-26 13:28 ` Chengming Zhou
2022-07-21 4:04 ` [PATCH 2/9] sched/psi: optimize task switch inside shared cgroups again Chengming Zhou
2022-07-21 4:04 ` [PATCH 3/9] sched/psi: move private helpers to sched/stats.h Chengming Zhou
2022-07-25 16:39 ` Johannes Weiner
2022-07-21 4:04 ` [PATCH 4/9] sched/psi: don't change task psi_flags when migrate CPU/group Chengming Zhou
2022-07-21 4:04 ` [PATCH 5/9] sched/psi: don't create cgroup PSI files when psi_disabled Chengming Zhou
2022-07-25 16:41 ` Johannes Weiner
2022-07-21 4:04 ` [PATCH 6/9] sched/psi: save percpu memory when !psi_cgroups_enabled Chengming Zhou
2022-07-25 16:47 ` Johannes Weiner
2022-07-21 4:04 ` [PATCH 7/9] sched/psi: cache parent psi_group to speed up groups iterate Chengming Zhou
2022-07-21 4:04 ` [PATCH 8/9] sched/psi: add kernel cmdline parameter psi_inner_cgroup Chengming Zhou
2022-07-25 16:52 ` Johannes Weiner
2022-07-26 13:38 ` [External] " Chengming Zhou
2022-07-26 17:54 ` Tejun Heo
2022-08-03 12:17 ` Chengming Zhou
2022-08-03 17:58 ` Tejun Heo
2022-08-03 19:22 ` Johannes Weiner
2022-08-03 19:48 ` Tejun Heo
2022-08-04 13:51 ` Chengming Zhou
2022-08-04 16:56 ` Johannes Weiner
2022-08-04 2:02 ` Chengming Zhou
2022-07-21 4:04 ` [PATCH 9/9] sched/psi: add PSI_IRQ to track IRQ/SOFTIRQ pressure Chengming Zhou
2022-07-21 10:00 ` kernel test robot
2022-07-21 22:10 ` kernel test robot
2022-07-22 3:30 ` Abel Wu
2022-07-22 6:13 ` Chengming Zhou
2022-07-22 7:14 ` Abel Wu
2022-07-22 7:33 ` Chengming Zhou
2022-07-25 18:26 ` Johannes Weiner
2022-07-26 13:55 ` [External] " Chengming Zhou
2022-07-27 11:28 ` Chengming Zhou
2022-07-27 13:00 ` Johannes Weiner
2022-07-27 15:09 ` Chengming Zhou
2022-07-27 16:07 ` Peter Zijlstra [this message]
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