linux-kernel - Re: [3/3,v3] tools/power turbostat: Enable accumulate RAPL display

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Message-ID: <20210312134114.GA21436@chenyu-desktop>
Date:   Fri, 12 Mar 2021 21:41:14 +0800
From:   Chen Yu <yu.c.chen@...el.com>
To:     Doug Smythies <dsmythies@...us.net>, bas@...nieuwenhuizen.nl,
        Bingsong Si <owen.si@...oud.cn>,
        youling257 <youling257@...il.com>
Cc:     bas@...nieuwenhuizen.nl, erwanaliasr1@...il.com, owen.si@...oud.cn,
        youling257 <youling257@...il.com>, lenb@...nel.org,
        rjw@...ysocki.net, linux-kernel@...r.kernel.org,
        Len Brown <len.brown@...el.com>,
        Zhang Rui <rui.zhang@...el.com>
Subject: Re: [3/3,v3] tools/power turbostat: Enable accumulate RAPL display

Hi Youling, Bas, and Bingsong,
On Wed, Mar 10, 2021 at 04:03:31PM -0800, Doug Smythies wrote:
> Hi Yu,
> 
> I am just resending your e-mail, adjusting the "To:" list to
> include the 3 others that have submitted similar patches.
> 
> ... Doug
> 
Could you please help check if the following combined patch works?

Thanks,
Chenyu


>From 00e0622b1b693a5c7dc343aeb3aa51614a9e125e Mon Sep 17 00:00:00 2001
From: Bas Nieuwenhuizen <bas@...nieuwenhuizen.nl>
Date: Fri, 12 Mar 2021 21:27:40 +0800
Subject: [PATCH] tools/power/turbostat: Fix turbostat for AMD Zen CPUs

It was reported that on Zen+ system turbostat started exiting,
which was tracked down to the MSR_PKG_ENERGY_STAT read failing because
offset_to_idx wasn't returning a non-negative index.

This patch combined the modification from Bingsong Si and
Bas Nieuwenhuizen and addd the MSR to the index system as alternative for
MSR_PKG_ENERGY_STATUS.

Fixes: 9972d5d84d76 ("tools/power turbostat: Enable accumulate RAPL display")
Reported-by: youling257 <youling257@...il.com>
Co-developed-by: Bingsong Si <owen.si@...oud.cn>
Signed-off-by: Chen Yu <yu.c.chen@...el.com>
---
 tools/power/x86/turbostat/turbostat.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/tools/power/x86/turbostat/turbostat.c b/tools/power/x86/turbostat/turbostat.c
index a7c4f0772e53..a7c965734fdf 100644
--- a/tools/power/x86/turbostat/turbostat.c
+++ b/tools/power/x86/turbostat/turbostat.c
@@ -297,7 +297,10 @@ int idx_to_offset(int idx)
 
 	switch (idx) {
 	case IDX_PKG_ENERGY:
-		offset = MSR_PKG_ENERGY_STATUS;
+		if (do_rapl & RAPL_AMD_F17H)
+			offset = MSR_PKG_ENERGY_STAT;
+		else
+			offset = MSR_PKG_ENERGY_STATUS;
 		break;
 	case IDX_DRAM_ENERGY:
 		offset = MSR_DRAM_ENERGY_STATUS;
@@ -326,6 +329,7 @@ int offset_to_idx(int offset)
 
 	switch (offset) {
 	case MSR_PKG_ENERGY_STATUS:
+	case MSR_PKG_ENERGY_STAT:
 		idx = IDX_PKG_ENERGY;
 		break;
 	case MSR_DRAM_ENERGY_STATUS:
@@ -353,7 +357,7 @@ int idx_valid(int idx)
 {
 	switch (idx) {
 	case IDX_PKG_ENERGY:
-		return do_rapl & RAPL_PKG;
+		return do_rapl & (RAPL_PKG | RAPL_AMD_F17H);
 	case IDX_DRAM_ENERGY:
 		return do_rapl & RAPL_DRAM;
 	case IDX_PP0_ENERGY:
-- 
2.25.1