linux-kernel - Re: [PATCH v2 08/13] selftests/resctrl: Add ->init() callback into resctrl_val

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Message-ID: <zxrd5yzgtbet3d42c77ifgu5t2guyhwbz76zhk7zhrp6hnamrb@pl72dxisxax6>
Date: Wed, 13 Mar 2024 11:15:30 +0100
From: Maciej Wieczor-Retman <maciej.wieczor-retman@...el.com>
To: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
CC: <linux-kselftest@...r.kernel.org>, Reinette Chatre
	<reinette.chatre@...el.com>, Shuah Khan <shuah@...nel.org>, Babu Moger
	<babu.moger@....com>, Fenghua Yu <fenghua.yu@...el.com>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 08/13] selftests/resctrl: Add ->init() callback into
 resctrl_val_param

Hi,

On 2024-03-11 at 15:52:25 +0200, Ilpo Järvinen wrote:
>diff --git a/tools/testing/selftests/resctrl/cmt_test.c b/tools/testing/selftests/resctrl/cmt_test.c
>index 241c0b129b58..e79eca9346f3 100644
>--- a/tools/testing/selftests/resctrl/cmt_test.c
>+++ b/tools/testing/selftests/resctrl/cmt_test.c
>@@ -16,6 +16,17 @@
> #define MAX_DIFF		2000000
> #define MAX_DIFF_PERCENT	15
> 
>+#define CON_MON_LCC_OCCUP_PATH		\
>+	"%s/%s/mon_groups/%s/mon_data/mon_L3_%02d/llc_occupancy"
>+
>+static int set_cmt_path(const struct resctrl_val_param *param, int domain_id)
>+{
>+	sprintf(llc_occup_path,	CON_MON_LCC_OCCUP_PATH,	RESCTRL_PATH,
>+		param->ctrlgrp, param->mongrp, domain_id);
>+
>+	return 0;
>+}
>+

Is there an option to make this function (and the set_mbm_path()) global through
the resctrl.h?

I'd like to use it in my SNC series [1] for looping over different nodes and
that requires changing the paths during the measure phase of the tests and that
part is currently in cache.c:measure_llc_resctrl().

Or would you suggest some other way of changing these paths in cache?

-- 
Kind regards
Maciej Wieczór-Retman