From: Noam Camus <noamca@mellanox.com>
To: linux-snps-arc@lists.infradead.org
Cc: linux-kernel@vger.kernel.org, Noam Camus <noamca@mellanox.com>
Subject: [PATCH v2 07/11] ARC: [plat-eznps] disabled stall counter due to a HW bug
Date: Sun, 28 May 2017 09:52:04 +0300 [thread overview]
Message-ID: <1495954328-28736-8-git-send-email-noamca@mellanox.com> (raw)
In-Reply-To: <1495954328-28736-1-git-send-email-noamca@mellanox.com>
From: Noam Camus <noamca@mellanox.com>
This counter represents threshold for consecutive stall that which
trigger HW threads scheduling.
When this feature is enabled low values of this counter cause
downgrade in performance and in the worst case even a livelock.
Remove those couple of lines and resort to HW reset value i.e.
this feature is disabled (.sten field equals 0).
Signed-off-by: Noam Camus <noamca@mellanox.com>
---
arch/arc/plat-eznps/mtm.c | 2 --
1 files changed, 0 insertions(+), 2 deletions(-)
diff --git a/arch/arc/plat-eznps/mtm.c b/arch/arc/plat-eznps/mtm.c
index aaaaffd..e0cb36b 100644
--- a/arch/arc/plat-eznps/mtm.c
+++ b/arch/arc/plat-eznps/mtm.c
@@ -119,8 +119,6 @@ void mtm_enable_core(unsigned int cpu)
mt_ctrl.value = 0;
mt_ctrl.hsen = 1;
mt_ctrl.hs_cnt = MT_CTRL_HS_CNT;
- mt_ctrl.sten = 1;
- mt_ctrl.st_cnt = MT_CTRL_ST_CNT;
mt_ctrl.mten = 1;
write_aux_reg(CTOP_AUX_MT_CTRL, mt_ctrl.value);
--
1.7.1
next prev parent reply other threads:[~2017-05-28 6:52 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-05-28 6:51 [PATCH v2 00/11] ARC plat-eznps upstream cont Noam Camus
2017-05-28 6:51 ` [PATCH v2 01/11] ARC: set level of log per CPU during boot to be debug level Noam Camus
2017-05-28 6:51 ` [PATCH v2 02/11] ARC: send ipi to all cpus sharing task mm in case of page fault Noam Camus
2017-05-30 16:40 ` Vineet Gupta
2017-05-28 6:52 ` [PATCH v2 03/11] ARC: typo fix in mm/fault.c Noam Camus
2017-05-28 6:52 ` [PATCH v2 04/11] ARC: typos fix in kernel/entry-compact.S Noam Camus
2017-05-28 6:52 ` [PATCH v2 05/11] ARC: [plat-eznps] typo fix at Kconfig Noam Camus
2017-05-28 6:52 ` [PATCH v2 06/11] ARC: [plat-eznps] Fix TLB Errata Noam Camus
2017-05-28 6:52 ` Noam Camus [this message]
2017-05-29 15:15 ` [PATCH v2 07/11] ARC: [plat-eznps] disabled stall counter due to a HW bug Alexey Brodkin
2017-05-28 6:52 ` [PATCH v2 08/11] ARC: [plat-eznps] spinlock aware for MTM Noam Camus
2017-06-02 18:36 ` Vineet Gupta
2017-06-04 6:11 ` Noam Camus
2017-05-28 6:52 ` [PATCH v2 09/11] ARC: [plat-eznps] use schd.wft instruction instead of sleep at idle task Noam Camus
2017-05-28 6:52 ` [PATCH v2 10/11] ARC: enable platform specific mem_service implementation Noam Camus
2017-05-28 6:52 ` [PATCH v2 11/11] ARC: [plat-eznps] Handle memory error as an exception Noam Camus
2017-06-02 19:04 ` Vineet Gupta
2017-06-04 6:10 ` Noam Camus
2017-06-06 22:10 ` Vineet Gupta
2017-06-07 6:07 ` Noam Camus
2017-06-07 11:14 ` Noam Camus
2017-06-07 16:15 ` Vineet Gupta
[not found] ` <AM5PR0502MB2996A1F4CFE1FE6AEB433A7DAAC80@AM5PR0502MB2996.eurprd05.prod.outlook.com>
[not found] ` <AM5PR0502MB2996FBD57D8591A42ED4A84CAAC90@AM5PR0502MB2996.eurprd05.prod.outlook.com>
2017-06-08 16:38 ` Vineet Gupta
[not found] ` <AM5PR0502MB299646D52F2A0AF3764CEC4BAAC90@AM5PR0502MB2996.eurprd05.prod.outlook.com>
2017-06-08 19:00 ` Vineet Gupta
[not found] ` <AM5PR0502MB2996B6DA5530C4B37A7B1AF0AACE0@AM5PR0502MB2996.eurprd05.prod.outlook.com>
2017-06-12 17:40 ` Vineet Gupta
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