* [PATCH] MIPS: Loongson: Add support for perf tool
@ 2020-04-26 9:30 Tiezhu Yang
2020-04-26 13:45 ` Thomas Bogendoerfer
0 siblings, 1 reply; 2+ messages in thread
From: Tiezhu Yang @ 2020-04-26 9:30 UTC (permalink / raw)
To: Thomas Bogendoerfer, Huacai Chen, Jiaxun Yang
Cc: linux-mips, linux-kernel, Xuefeng Li
In order to use perf tool on the Loongson platform, we should enable kernel
support for various performance events provided by software and hardware,
so add CONFIG_PERF_EVENTS=y to loongson3_defconfig.
E.g. without this patch:
[loongson@localhost perf]$ ./perf list
List of pre-defined events (to be used in -e):
duration_time [Tool event]
rNNN [Raw hardware event descriptor]
cpu/t1=v1[,t2=v2,t3 ...]/modifier [Raw hardware event descriptor]
(see 'man perf-list' on how to encode it)
mem:<addr>[/len][:access] [Hardware breakpoint]
With this patch:
[loongson@localhost perf]$ ./perf list
List of pre-defined events (to be used in -e):
branch-instructions OR branches [Hardware event]
branch-misses [Hardware event]
cpu-cycles OR cycles [Hardware event]
instructions [Hardware event]
alignment-faults [Software event]
bpf-output [Software event]
context-switches OR cs [Software event]
cpu-clock [Software event]
cpu-migrations OR migrations [Software event]
dummy [Software event]
emulation-faults [Software event]
major-faults [Software event]
minor-faults [Software event]
page-faults OR faults [Software event]
task-clock [Software event]
duration_time [Tool event]
L1-dcache-load-misses [Hardware cache event]
L1-dcache-store-misses [Hardware cache event]
L1-icache-load-misses [Hardware cache event]
branch-load-misses [Hardware cache event]
branch-loads [Hardware cache event]
dTLB-load-misses [Hardware cache event]
dTLB-store-misses [Hardware cache event]
iTLB-load-misses [Hardware cache event]
rNNN [Raw hardware event descriptor]
cpu/t1=v1[,t2=v2,t3 ...]/modifier [Raw hardware event descriptor]
(see 'man perf-list' on how to encode it)
mem:<addr>[/len][:access] [Hardware breakpoint]
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
---
arch/mips/configs/loongson3_defconfig | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/mips/configs/loongson3_defconfig b/arch/mips/configs/loongson3_defconfig
index 51675f5..6768c16 100644
--- a/arch/mips/configs/loongson3_defconfig
+++ b/arch/mips/configs/loongson3_defconfig
@@ -21,6 +21,7 @@ CONFIG_SYSFS_DEPRECATED=y
CONFIG_RELAY=y
CONFIG_BLK_DEV_INITRD=y
CONFIG_EMBEDDED=y
+CONFIG_PERF_EVENTS=y
CONFIG_MACH_LOONGSON64=y
CONFIG_SMP=y
CONFIG_HZ_256=y
--
2.1.0
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [PATCH] MIPS: Loongson: Add support for perf tool
2020-04-26 9:30 [PATCH] MIPS: Loongson: Add support for perf tool Tiezhu Yang
@ 2020-04-26 13:45 ` Thomas Bogendoerfer
0 siblings, 0 replies; 2+ messages in thread
From: Thomas Bogendoerfer @ 2020-04-26 13:45 UTC (permalink / raw)
To: Tiezhu Yang
Cc: Huacai Chen, Jiaxun Yang, linux-mips, linux-kernel, Xuefeng Li
On Sun, Apr 26, 2020 at 05:30:45PM +0800, Tiezhu Yang wrote:
> In order to use perf tool on the Loongson platform, we should enable kernel
> support for various performance events provided by software and hardware,
> so add CONFIG_PERF_EVENTS=y to loongson3_defconfig.
>
> E.g. without this patch:
>
> [loongson@localhost perf]$ ./perf list
>
> List of pre-defined events (to be used in -e):
>
> duration_time [Tool event]
>
> rNNN [Raw hardware event descriptor]
> cpu/t1=v1[,t2=v2,t3 ...]/modifier [Raw hardware event descriptor]
> (see 'man perf-list' on how to encode it)
>
> mem:<addr>[/len][:access] [Hardware breakpoint]
>
> With this patch:
>
> [loongson@localhost perf]$ ./perf list
>
> List of pre-defined events (to be used in -e):
>
> branch-instructions OR branches [Hardware event]
> branch-misses [Hardware event]
> cpu-cycles OR cycles [Hardware event]
> instructions [Hardware event]
>
> alignment-faults [Software event]
> bpf-output [Software event]
> context-switches OR cs [Software event]
> cpu-clock [Software event]
> cpu-migrations OR migrations [Software event]
> dummy [Software event]
> emulation-faults [Software event]
> major-faults [Software event]
> minor-faults [Software event]
> page-faults OR faults [Software event]
> task-clock [Software event]
>
> duration_time [Tool event]
>
> L1-dcache-load-misses [Hardware cache event]
> L1-dcache-store-misses [Hardware cache event]
> L1-icache-load-misses [Hardware cache event]
> branch-load-misses [Hardware cache event]
> branch-loads [Hardware cache event]
> dTLB-load-misses [Hardware cache event]
> dTLB-store-misses [Hardware cache event]
> iTLB-load-misses [Hardware cache event]
>
> rNNN [Raw hardware event descriptor]
> cpu/t1=v1[,t2=v2,t3 ...]/modifier [Raw hardware event descriptor]
> (see 'man perf-list' on how to encode it)
>
> mem:<addr>[/len][:access] [Hardware breakpoint]
>
> Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
> ---
> arch/mips/configs/loongson3_defconfig | 1 +
> 1 file changed, 1 insertion(+)
applied to mips-next.
Thomas.
--
Crap can work. Given enough thrust pigs will fly, but it's not necessarily a
good idea. [ RFC1925, 2.3 ]
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