From: Grygorii Strashko <grygorii.strashko@ti.com>
To: <linux-rt-users@vger.kernel.org>
Cc: <linux-kernel@vger.kernel.org>,
Linux ARM Mailing List <linux-arm-kernel@lists.infradead.org>
Subject: arm64 + ARM64_64K_PAGES=y
Date: Tue, 6 Nov 2018 15:34:55 -0600 [thread overview]
Message-ID: <1ab7ee03-64fe-384a-c88f-f6d519b965db@ti.com> (raw)
Hi All,
Do anybody tried to use ARM64 RT with 76K pages enabled?
My attempt shows that enabling CONFIG_ARM64_64K_PAGES=y increases latencies by ~30%
cyclictest -n -m -Sp98 -q -D2m with CONFIG_ARM64_64K_PAGES=y
T: 0 ( 772) P:98 I:1000 C: 120000 Min: 7 Act: 13 Avg: 10 Max: 85
T: 1 ( 773) P:98 I:1500 C: 79998 Min: 7 Act: 13 Avg: 10 Max: 71
T: 2 ( 774) P:98 I:2000 C: 59997 Min: 7 Act: 11 Avg: 11 Max: 64
T: 3 ( 775) P:98 I:2500 C: 47996 Min: 7 Act: 14 Avg: 12 Max: 66
cyclictest -n -m -Sp98 -q -D2m with CONFIG_ARM64_64K_PAGES=n
T: 0 ( 697) P:98 I:1000 C: 120000 Min: 7 Act: 10 Avg: 9 Max: 38
T: 1 ( 698) P:98 I:1500 C: 79987 Min: 7 Act: 10 Avg: 10 Max: 32
T: 2 ( 699) P:98 I:2000 C: 59981 Min: 7 Act: 14 Avg: 11 Max: 46
T: 3 ( 700) P:98 I:2500 C: 47977 Min: 6 Act: 11 Avg: 10 Max: 45
--
regards,
-grygorii
next reply other threads:[~2018-11-06 21:35 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-06 21:34 Grygorii Strashko [this message]
2018-11-08 12:00 ` Sebastian Andrzej Siewior
2018-11-08 18:14 ` Grygorii Strashko
2018-11-09 19:15 ` Grygorii Strashko
2018-11-12 14:27 ` Andre Przywara
2018-11-12 21:22 ` Grygorii Strashko
2018-11-09 4:42 ` Anshuman Khandual
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