From: "Darrick J. Wong" <djwong@kernel.org>
To: akpm@linux-foundation.org, daniel@gluo.nz,
kent.overstreet@linux.dev, djwong@kernel.org
Cc: linux-xfs@vger.kernel.org, linux-bcachefs@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: [PATCH 03/10] time_stats: fix struct layout bloat
Date: Fri, 23 Feb 2024 17:10:52 -0800 [thread overview]
Message-ID: <170873667989.1860949.8776444464588431097.stgit@frogsfrogsfrogs> (raw)
In-Reply-To: <170873667916.1860949.11027844260383646446.stgit@frogsfrogsfrogs>
From: Darrick J. Wong <djwong@kernel.org>
Make these more efficient by getting rid of the holes. This reduces the
structure size from 224 bytes to 208 bytes.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
---
include/linux/time_stats.h | 18 +++++++++---------
1 file changed, 9 insertions(+), 9 deletions(-)
diff --git a/include/linux/time_stats.h b/include/linux/time_stats.h
index c05490101d197..1c1ba8efa7bfe 100644
--- a/include/linux/time_stats.h
+++ b/include/linux/time_stats.h
@@ -77,19 +77,19 @@ struct time_stats {
u64 last_event;
u64 last_event_start;
-/*
- * Is this really a struct time_stats_quantiled? Hide this flag in the least
- * significant bit of the start time to avoid blowing up the structure size.
- */
-#define TIME_STATS_HAVE_QUANTILES (1ULL << 0)
-
- u64 start_time;
-
struct mean_and_variance duration_stats;
- struct mean_and_variance_weighted duration_stats_weighted;
struct mean_and_variance freq_stats;
+ struct mean_and_variance_weighted duration_stats_weighted;
struct mean_and_variance_weighted freq_stats_weighted;
struct time_stat_buffer __percpu *buffer;
+
+/*
+ * Is this really a struct time_stats_quantiled? Hide this flag in the least
+ * significant bit of the start time to avoid blowing up the structure size.
+ */
+#define TIME_STATS_HAVE_QUANTILES (1ULL << 0)
+
+ u64 start_time;
};
struct time_stats_quantiles {
next prev parent reply other threads:[~2024-02-24 1:10 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-24 1:00 [PATCHBOMB] time_stats, thread_with_file: lifting generic code to lib Darrick J. Wong
2024-02-24 1:07 ` [PATCHSET 1/6] time_stats: promote to lib/ Darrick J. Wong
2024-02-24 1:09 ` [PATCH 1/4] mean and variance: Promote to lib/math Darrick J. Wong
2024-02-24 1:09 ` [PATCH 2/4] eytzinger: Promote to include/linux/ Darrick J. Wong
2024-02-24 1:09 ` [PATCH 3/4] bcachefs: bch2_time_stats_to_seq_buf() Darrick J. Wong
2024-02-24 1:10 ` [PATCH 4/4] time_stats: Promote to lib/ Darrick J. Wong
2024-02-24 1:08 ` [PATCHSET 2/6] time_stats: cleanups and fixes Darrick J. Wong
2024-02-24 1:10 ` [PATCH 01/10] time_stats: report lifetime of the stats object Darrick J. Wong
2024-02-24 1:10 ` [PATCH 02/10] time_stats: split stats-with-quantiles into a separate structure Darrick J. Wong
2024-02-24 1:10 ` Darrick J. Wong [this message]
2024-02-24 1:11 ` [PATCH 04/10] time_stats: add larger units Darrick J. Wong
2024-02-24 1:11 ` [PATCH 05/10] time_stats: don't print any output if event count is zero Darrick J. Wong
2024-02-24 1:11 ` [PATCH 06/10] time_stats: allow custom epoch names Darrick J. Wong
2024-02-24 1:11 ` [PATCH 07/10] mean_and_variance: put struct mean_and_variance_weighted on a diet Darrick J. Wong
2024-02-24 1:12 ` [PATCH 08/10] time_stats: shrink time_stat_buffer for better alignment Darrick J. Wong
2024-02-24 1:12 ` [PATCH 09/10] time_stats: report information in json format Darrick J. Wong
2024-02-24 4:15 ` Darrick J. Wong
2024-02-24 5:10 ` Kent Overstreet
2024-02-24 6:02 ` Darrick J. Wong
2024-02-24 1:12 ` [PATCH 10/10] time_stats: Kill TIME_STATS_HAVE_QUANTILES Darrick J. Wong
2024-02-24 1:08 ` [PATCHSET 4/6] thread_with_file: promote to lib/ Darrick J. Wong
2024-02-24 1:14 ` [PATCH 01/10] bcachefs: thread_with_stdio: eliminate double buffering Darrick J. Wong
2024-02-24 1:14 ` [PATCH 02/10] bcachefs: thread_with_stdio: convert to darray Darrick J. Wong
2024-02-24 1:14 ` [PATCH 03/10] bcachefs: thread_with_stdio: kill thread_with_stdio_done() Darrick J. Wong
2024-02-24 1:14 ` [PATCH 04/10] bcachefs: thread_with_stdio: fix bch2_stdio_redirect_readline() Darrick J. Wong
2024-02-24 1:15 ` [PATCH 05/10] bcachefs: Thread with file documentation Darrick J. Wong
2024-02-24 1:15 ` [PATCH 06/10] darray: lift from bcachefs Darrick J. Wong
2024-02-24 1:15 ` [PATCH 07/10] thread_with_file: Lift " Darrick J. Wong
2024-02-24 1:15 ` [PATCH 08/10] thread_with_stdio: Mark completed in ->release() Darrick J. Wong
2024-02-24 1:16 ` [PATCH 09/10] kernel/hung_task.c: export sysctl_hung_task_timeout_secs Darrick J. Wong
2024-02-24 1:16 ` [PATCH 10/10] thread_with_stdio: suppress hung task warning Darrick J. Wong
2024-02-24 1:08 ` [PATCHSET 5/6] thread_with_file: cleanups and fixes Darrick J. Wong
2024-02-24 1:16 ` [PATCH 1/5] thread_with_file: allow creation of readonly files Darrick J. Wong
2024-02-24 1:16 ` [PATCH 2/5] thread_with_file: fix various printf problems Darrick J. Wong
2024-02-24 1:17 ` [PATCH 3/5] thread_with_file: create ops structure for thread_with_stdio Darrick J. Wong
2024-02-24 1:17 ` [PATCH 4/5] thread_with_file: allow ioctls against these files Darrick J. Wong
2024-02-24 1:17 ` [PATCH 5/5] thread_with_file: Fix missing va_end() Darrick J. Wong
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