* [PATCH 0/3] powerpc: Instrument Hypervisor Calls
@ 2006-07-21 6:38 Mike Kravetz
2006-07-21 6:39 ` [PATCH 1/3] powerpc: Instrument Hypervisor Calls: merge headers Mike Kravetz
` (2 more replies)
0 siblings, 3 replies; 6+ messages in thread
From: Mike Kravetz @ 2006-07-21 6:38 UTC (permalink / raw)
To: Paul Mackerras; +Cc: linuxppc-dev
Here is a version of the instrumentation patches built on top of
Anton's hcall cleanup patch. In addition, I have gathered the
timebase and PURR snapshots in assembly code. However, it still
performs a call out to C code that updates the data structures.
I'd appreciate some comments on the assembly code as it has been
a looooong time since I've written any.
--
Mike
^ permalink raw reply [flat|nested] 6+ messages in thread* [PATCH 1/3] powerpc: Instrument Hypervisor Calls: merge headers 2006-07-21 6:38 [PATCH 0/3] powerpc: Instrument Hypervisor Calls Mike Kravetz @ 2006-07-21 6:39 ` Mike Kravetz 2006-07-21 12:14 ` Stephen Rothwell 2006-07-21 6:41 ` [PATCH 2/3] powerpc: Instrument Hypervisor Calls: add instrumentation Mike Kravetz 2006-07-21 6:49 ` [PATCH 3/3] powerpc: Instrument Hypervisor Calls: add debugfs file Mike Kravetz 2 siblings, 1 reply; 6+ messages in thread From: Mike Kravetz @ 2006-07-21 6:39 UTC (permalink / raw) To: Paul Mackerras; +Cc: linuxppc-dev Move all the Hypervisor call definitions to to a single header file. -- Signed-off-by: Mike Kravetz <kravetz@us.ibm.com> diff -Naupr powerpc/drivers/net/ibmveth.h powerpc.work/drivers/net/ibmveth.h --- powerpc/drivers/net/ibmveth.h 2006-07-19 18:58:18.000000000 +0000 +++ powerpc.work/drivers/net/ibmveth.h 2006-07-21 07:03:44.000000000 +0000 @@ -41,16 +41,6 @@ #define IbmVethMcastRemoveFilter 0x2UL #define IbmVethMcastClearFilterTable 0x3UL -/* hcall numbers */ -#define H_VIO_SIGNAL 0x104 -#define H_REGISTER_LOGICAL_LAN 0x114 -#define H_FREE_LOGICAL_LAN 0x118 -#define H_ADD_LOGICAL_LAN_BUFFER 0x11C -#define H_SEND_LOGICAL_LAN 0x120 -#define H_MULTICAST_CTRL 0x130 -#define H_CHANGE_LOGICAL_LAN_MAC 0x14C -#define H_FREE_LOGICAL_LAN_BUFFER 0x1D4 - /* hcall macros */ #define h_register_logical_lan(ua, buflst, rxq, fltlst, mac) \ plpar_hcall_norets(H_REGISTER_LOGICAL_LAN, ua, buflst, rxq, fltlst, mac) diff -Naupr powerpc/include/asm-powerpc/hvcall.h powerpc.work/include/asm-powerpc/hvcall.h --- powerpc/include/asm-powerpc/hvcall.h 2006-07-19 18:58:18.000000000 +0000 +++ powerpc.work/include/asm-powerpc/hvcall.h 2006-07-21 07:03:44.000000000 +0000 @@ -164,9 +164,15 @@ #define H_VIO_SIGNAL 0x104 #define H_SEND_CRQ 0x108 #define H_COPY_RDMA 0x110 +#define H_REGISTER_LOGICAL_LAN 0x114 +#define H_FREE_LOGICAL_LAN 0x118 +#define H_ADD_LOGICAL_LAN_BUFFER 0x11C +#define H_SEND_LOGICAL_LAN 0x120 +#define H_MULTICAST_CTRL 0x130 #define H_SET_XDABR 0x134 #define H_STUFF_TCE 0x138 #define H_PUT_TCE_INDIRECT 0x13C +#define H_CHANGE_LOGICAL_LAN_MAC 0x14C #define H_VTERM_PARTNER_INFO 0x150 #define H_REGISTER_VTERM 0x154 #define H_FREE_VTERM 0x158 @@ -196,11 +202,13 @@ #define H_GET_HCA_INFO 0x1B8 #define H_GET_PERF_COUNT 0x1BC #define H_MANAGE_TRACE 0x1C0 +#define H_FREE_LOGICAL_LAN_BUFFER 0x1D4 #define H_QUERY_INT_STATE 0x1E4 #define H_POLL_PENDING 0x1D8 #define H_JOIN 0x298 #define H_VASI_STATE 0x2A4 #define H_ENABLE_CRQ 0x2B0 +#define MAX_HCALL_OPCODES (H_ENABLE_CRQ >> 2) #ifndef __ASSEMBLY__ ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH 1/3] powerpc: Instrument Hypervisor Calls: merge headers 2006-07-21 6:39 ` [PATCH 1/3] powerpc: Instrument Hypervisor Calls: merge headers Mike Kravetz @ 2006-07-21 12:14 ` Stephen Rothwell 0 siblings, 0 replies; 6+ messages in thread From: Stephen Rothwell @ 2006-07-21 12:14 UTC (permalink / raw) To: paulus; +Cc: linuxppc-dev [-- Attachment #1: Type: text/plain, Size: 414 bytes --] Hi Paulus, On Thu, 20 Jul 2006 23:39:51 -0700 Mike Kravetz <kravetz@us.ibm.com> wrote: > > Move all the Hypervisor call definitions to to a single header file. > -- > Signed-off-by: Mike Kravetz <kravetz@us.ibm.com> Can you put this one in immediately just to save Mike having to repost it :-) -- Cheers, Stephen Rothwell sfr@canb.auug.org.au http://www.canb.auug.org.au/~sfr/ [-- Attachment #2: Type: application/pgp-signature, Size: 189 bytes --] ^ permalink raw reply [flat|nested] 6+ messages in thread
* [PATCH 2/3] powerpc: Instrument Hypervisor Calls: add instrumentation 2006-07-21 6:38 [PATCH 0/3] powerpc: Instrument Hypervisor Calls Mike Kravetz 2006-07-21 6:39 ` [PATCH 1/3] powerpc: Instrument Hypervisor Calls: merge headers Mike Kravetz @ 2006-07-21 6:41 ` Mike Kravetz 2006-07-21 6:48 ` Mike Kravetz 2006-07-21 6:49 ` [PATCH 3/3] powerpc: Instrument Hypervisor Calls: add debugfs file Mike Kravetz 2 siblings, 1 reply; 6+ messages in thread From: Mike Kravetz @ 2006-07-21 6:41 UTC (permalink / raw) To: Paul Mackerras; +Cc: linuxppc-dev Gather snapshots in the hcall routines and make callout to update data. -- Signed-off-by: Mike Kravetz <kravetz@us.ibm.com> diff -Naupr linux-2.6.17-rc6/arch/powerpc/Kconfig.debug linux-2.6.17-rc6.work/arch/powerpc/Kconfig.debug --- linux-2.6.17-rc6/arch/powerpc/Kconfig.debug 2006-06-06 00:57:02.000000000 +0000 +++ linux-2.6.17-rc6.work/arch/powerpc/Kconfig.debug 2006-06-13 21:39:24.000000000 +0000 @@ -18,6 +18,16 @@ config DEBUG_STACK_USAGE This option will slow down process creation somewhat. +config HCALL_STATS + bool "Hypervisor call instrumentation" + depends on PPC_PSERIES + help + Adds code to keep track of number of hypervisor calls made and + the amount of time spent in hypervisor calls. + + This option will add a small amount of overhead to all hypervisor + calls. + config DEBUGGER bool "Enable debugger hooks" depends on DEBUG_KERNEL diff -Naupr linux-2.6.17-rc6/arch/powerpc/platforms/pseries/Makefile linux-2.6.17-rc6.work/arch/powerpc/platforms/pseries/Makefile --- linux-2.6.17-rc6/arch/powerpc/platforms/pseries/Makefile 2006-06-06 00:57:02.000000000 +0000 +++ linux-2.6.17-rc6.work/arch/powerpc/platforms/pseries/Makefile 2006-06-13 21:39:24.000000000 +0000 @@ -9,3 +9,4 @@ obj-$(CONFIG_EEH) += eeh.o eeh_cache.o e obj-$(CONFIG_HVC_CONSOLE) += hvconsole.o obj-$(CONFIG_HVCS) += hvcserver.o +obj-$(CONFIG_HCALL_STATS) += hvCall_inst.o diff -Naupr linux-2.6.17-rc6/arch/powerpc/platforms/pseries/hvCall.S linux-2.6.17-rc6.work/arch/powerpc/platforms/pseries/hvCall.S --- linux-2.6.17-rc6/arch/powerpc/platforms/pseries/hvCall.S 2006-06-06 00:57:02.000000000 +0000 +++ linux-2.6.17-rc6.work/arch/powerpc/platforms/pseries/hvCall.S 2006-06-13 21:39:24.000000000 +0000 @@ -25,7 +25,11 @@ unsigned long *out2, R9 unsigned long *out3); R10 */ +#ifdef CONFIG_HCALL_STATS +_GLOBAL(plpar_hcall_base) +#else _GLOBAL(plpar_hcall) +#endif HMT_MEDIUM mfcr r0 @@ -52,7 +56,15 @@ _GLOBAL(plpar_hcall) /* Simple interface with no output values (other than status) */ +#ifdef CONFIG_HCALL_STATS _GLOBAL(plpar_hcall_norets) + b plpar_hcall_norets_C + + +_GLOBAL(plpar_hcall_norets_base) +#else +_GLOBAL(plpar_hcall_norets) +#endif HMT_MEDIUM mfcr r0 @@ -76,7 +88,11 @@ _GLOBAL(plpar_hcall_norets) unsigned long arg8, 112(R1) unsigned long *out1); 120(R1) */ +#ifdef CONFIG_HCALL_STATS +_GLOBAL(plpar_hcall_8arg_2ret_base) +#else _GLOBAL(plpar_hcall_8arg_2ret) +#endif HMT_MEDIUM mfcr r0 @@ -102,7 +118,11 @@ _GLOBAL(plpar_hcall_8arg_2ret) unsigned long *out3, R10 unsigned long *out4); 112(R1) */ +#ifdef CONFIG_HCALL_STATS +_GLOBAL(plpar_hcall_4out_base) +#else _GLOBAL(plpar_hcall_4out) +#endif HMT_MEDIUM mfcr r0 @@ -144,7 +164,11 @@ _GLOBAL(plpar_hcall_4out) unsigned long *out6, 102(R1) unsigned long *out7); 100(R1) */ +#ifdef CONFIG_HCALL_STATS +_GLOBAL(plpar_hcall_7arg_7ret_base) +#else _GLOBAL(plpar_hcall_7arg_7ret) +#endif HMT_MEDIUM mfcr r0 @@ -193,7 +217,11 @@ _GLOBAL(plpar_hcall_7arg_7ret) unsigned long *out8, 94(R1) unsigned long *out9, 92(R1) */ +#ifdef CONFIG_HCALL_STATS +_GLOBAL(plpar_hcall_9arg_9ret_base) +#else _GLOBAL(plpar_hcall_9arg_9ret) +#endif HMT_MEDIUM mfcr r0 diff -Naupr linux-2.6.17-rc6/arch/powerpc/platforms/pseries/hvCall_inst.c linux-2.6.17-rc6.work/arch/powerpc/platforms/pseries/hvCall_inst.c --- linux-2.6.17-rc6/arch/powerpc/platforms/pseries/hvCall_inst.c 1970-01-01 00:00:00.000000000 +0000 +++ linux-2.6.17-rc6.work/arch/powerpc/platforms/pseries/hvCall_inst.c 2006-06-13 21:39:24.000000000 +0000 @@ -0,0 +1,239 @@ +/* + * Copyright (C) 2006 Mike Kravetz IBM Corporation + * + * Hypervisor Call Instrumentation + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#include <linux/kernel.h> +#include <linux/percpu.h> +#include <asm/hvcall.h> + +DEFINE_PER_CPU(struct hcall_stats[MAX_HCALL_OPCODES+1], hcall_stats); + +static inline void update_stats(unsigned long opcode, unsigned long t_before) +{ + unsigned long op_index= opcode >> 2; + struct hcall_stats *hs = &__get_cpu_var(hcall_stats[op_index]); + + /* racey, but acceptable for non-critical stats */ + hs->total_time += (mfspr(SPRN_PURR) - t_before); + hs->num_calls++; +} + +extern long plpar_hcall_base (unsigned long opcode, + unsigned long arg1, + unsigned long arg2, + unsigned long arg3, + unsigned long arg4, + unsigned long *out1, + unsigned long *out2, + unsigned long *out3); + +long plpar_hcall(unsigned long opcode, + unsigned long arg1, + unsigned long arg2, + unsigned long arg3, + unsigned long arg4, + unsigned long *out1, + unsigned long *out2, + unsigned long *out3) +{ + long rc; + unsigned long t_before = mfspr(SPRN_PURR); + + rc = plpar_hcall_base(opcode, arg1, arg2, arg3, arg4, out1, out2, out3); + + update_stats(opcode, t_before); + return rc; +} + +extern long plpar_hcall_norets_base(unsigned long opcode, ...); + +long plpar_hcall_norets_C(unsigned long opcode, + unsigned long arg1, + unsigned long arg2, + unsigned long arg3, + unsigned long arg4, + unsigned long arg5, + unsigned long arg6) +{ + long rc; + unsigned long t_before = mfspr(SPRN_PURR); + + rc = plpar_hcall_norets_base(opcode, arg1, arg2, arg3, arg4, arg5, + arg6); + + update_stats(opcode, t_before); + return rc; +} + +extern long plpar_hcall_8arg_2ret_base(unsigned long opcode, + unsigned long arg1, + unsigned long arg2, + unsigned long arg3, + unsigned long arg4, + unsigned long arg5, + unsigned long arg6, + unsigned long arg7, + unsigned long arg8, + unsigned long *out1); + +long plpar_hcall_8arg_2ret(unsigned long opcode, + unsigned long arg1, + unsigned long arg2, + unsigned long arg3, + unsigned long arg4, + unsigned long arg5, + unsigned long arg6, + unsigned long arg7, + unsigned long arg8, + unsigned long *out1) +{ + long rc; + unsigned long t_before = mfspr(SPRN_PURR); + + rc = plpar_hcall_8arg_2ret_base(opcode, arg1, arg2, arg3, arg4, arg5, + arg6, arg7, arg8, out1); + + update_stats(opcode, t_before); + return rc; +} + +extern long plpar_hcall_4out_base(unsigned long opcode, + unsigned long arg1, + unsigned long arg2, + unsigned long arg3, + unsigned long arg4, + unsigned long *out1, + unsigned long *out2, + unsigned long *out3, + unsigned long *out4); + +long plpar_hcall_4out(unsigned long opcode, + unsigned long arg1, + unsigned long arg2, + unsigned long arg3, + unsigned long arg4, + unsigned long *out1, + unsigned long *out2, + unsigned long *out3, + unsigned long *out4) +{ + long rc; + unsigned long t_before = mfspr(SPRN_PURR); + + rc = plpar_hcall_4out_base(opcode, arg1, arg2, arg3, arg4, out1, + out2, out3, out4); + + update_stats(opcode, t_before); + return rc; +} + +extern long plpar_hcall_7arg_7ret_base(unsigned long opcode, + unsigned long arg1, + unsigned long arg2, + unsigned long arg3, + unsigned long arg4, + unsigned long arg5, + unsigned long arg6, + unsigned long arg7, + unsigned long *out1, + unsigned long *out2, + unsigned long *out3, + unsigned long *out4, + unsigned long *out5, + unsigned long *out6, + unsigned long *out7); + +long plpar_hcall_7arg_7ret(unsigned long opcode, + unsigned long arg1, + unsigned long arg2, + unsigned long arg3, + unsigned long arg4, + unsigned long arg5, + unsigned long arg6, + unsigned long arg7, + unsigned long *out1, + unsigned long *out2, + unsigned long *out3, + unsigned long *out4, + unsigned long *out5, + unsigned long *out6, + unsigned long *out7) +{ + long rc; + unsigned long t_before = mfspr(SPRN_PURR); + + rc = plpar_hcall_7arg_7ret_base(opcode, arg1, arg2, arg3, arg4, arg5, + arg6, arg7, out1, out2, out3, out4, + out5, out6, out7); + + update_stats(opcode, t_before); + return rc; +} + +extern long plpar_hcall_9arg_9ret_base(unsigned long opcode, + unsigned long arg1, + unsigned long arg2, + unsigned long arg3, + unsigned long arg4, + unsigned long arg5, + unsigned long arg6, + unsigned long arg7, + unsigned long arg8, + unsigned long arg9, + unsigned long *out1, + unsigned long *out2, + unsigned long *out3, + unsigned long *out4, + unsigned long *out5, + unsigned long *out6, + unsigned long *out7, + unsigned long *out8, + unsigned long *out9); + +long plpar_hcall_9arg_9ret(unsigned long opcode, + unsigned long arg1, + unsigned long arg2, + unsigned long arg3, + unsigned long arg4, + unsigned long arg5, + unsigned long arg6, + unsigned long arg7, + unsigned long arg8, + unsigned long arg9, + unsigned long *out1, + unsigned long *out2, + unsigned long *out3, + unsigned long *out4, + unsigned long *out5, + unsigned long *out6, + unsigned long *out7, + unsigned long *out8, + unsigned long *out9) +{ + long rc; + unsigned long t_before = mfspr(SPRN_PURR); + + rc = plpar_hcall_9arg_9ret_base(opcode, arg1, arg2, arg3, arg4, arg5, + arg6, arg7, arg8, arg9, out1, out2, + out3, out4, out5, out6, out7, out8, + out9); + + update_stats(opcode, t_before); + return rc; +} diff -Naupr linux-2.6.17-rc6/include/asm-powerpc/hvcall.h linux-2.6.17-rc6.work/include/asm-powerpc/hvcall.h --- linux-2.6.17-rc6/include/asm-powerpc/hvcall.h 2006-06-13 21:38:45.000000000 +0000 +++ linux-2.6.17-rc6.work/include/asm-powerpc/hvcall.h 2006-06-13 21:39:24.000000000 +0000 @@ -292,6 +292,13 @@ long plpar_hcall_9arg_9ret(unsigned long unsigned long *out8, unsigned long *out9); +#ifdef CONFIG_HCALL_STATS +struct hcall_stats { + unsigned long num_calls; + unsigned long total_time; +}; +#endif /* CONFIG_HCALL_STATS */ + #endif /* __ASSEMBLY__ */ #endif /* __KERNEL__ */ #endif /* _ASM_POWERPC_HVCALL_H */ ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH 2/3] powerpc: Instrument Hypervisor Calls: add instrumentation 2006-07-21 6:41 ` [PATCH 2/3] powerpc: Instrument Hypervisor Calls: add instrumentation Mike Kravetz @ 2006-07-21 6:48 ` Mike Kravetz 0 siblings, 0 replies; 6+ messages in thread From: Mike Kravetz @ 2006-07-21 6:48 UTC (permalink / raw) To: Paul Mackerras; +Cc: linuxppc-dev On Thu, Jul 20, 2006 at 11:41:53PM -0700, Mike Kravetz wrote: > Gather snapshots in the hcall routines and make callout to update data. Wrong patch!!!! Sorry! Here is the correct one. Gather snapshots in the hcall routines and make callout to update data. -- Signed-off-by: Mike Kravetz <kravetz@us.ibm.com> diff -Naupr powerpc/arch/powerpc/Kconfig.debug powerpc.work/arch/powerpc/Kconfig.debug --- powerpc/arch/powerpc/Kconfig.debug 2006-07-19 18:45:58.000000000 +0000 +++ powerpc.work/arch/powerpc/Kconfig.debug 2006-07-21 07:06:49.000000000 +0000 @@ -18,6 +18,20 @@ config DEBUG_STACK_USAGE This option will slow down process creation somewhat. +config HCALL_STATS + bool "Hypervisor call instrumentation" + depends on PPC_PSERIES && DEBUG_FS + help + Adds code to keep track of the number of hypervisor calls made and + the amount of time spent in hypervisor calls: both wall time (based + on time base) and cpu time (based on PURR). A directory named + hcall_inst is added at the root of the debugfs filesystem. Within + the hcall_inst directory are files that contain CPU specific call + statistics. + + This option will add a small amount of overhead to all hypervisor + calls. + config DEBUGGER bool "Enable debugger hooks" depends on DEBUG_KERNEL diff -Naupr powerpc/arch/powerpc/platforms/pseries/Makefile powerpc.work/arch/powerpc/platforms/pseries/Makefile --- powerpc/arch/powerpc/platforms/pseries/Makefile 2006-07-19 18:46:08.000000000 +0000 +++ powerpc.work/arch/powerpc/platforms/pseries/Makefile 2006-07-21 07:06:49.000000000 +0000 @@ -12,3 +12,4 @@ obj-$(CONFIG_EEH) += eeh.o eeh_cache.o e obj-$(CONFIG_HVC_CONSOLE) += hvconsole.o obj-$(CONFIG_HVCS) += hvcserver.o +obj-$(CONFIG_HCALL_STATS) += hvCall_inst.o diff -Naupr powerpc/arch/powerpc/platforms/pseries/hvCall.S powerpc.work/arch/powerpc/platforms/pseries/hvCall.S --- powerpc/arch/powerpc/platforms/pseries/hvCall.S 2006-07-19 18:58:18.000000000 +0000 +++ powerpc.work/arch/powerpc/platforms/pseries/hvCall.S 2006-07-21 07:06:49.000000000 +0000 @@ -11,7 +11,57 @@ #include <asm/processor.h> #include <asm/ppc_asm.h> -#define STK_PARM(i) (48 + ((i)-3)*8) +#define STK_PARM(i) (STACKFRAMESIZE + 48 + ((i)-3)*8) +#define STK_REG(i) (112 + ((i)-14)*8) + +#ifdef CONFIG_HCALL_STATS +#define STACKFRAMESIZE 256 +#define HCALL_INST_PRECALL \ + /* use stack frame to save a few non-volital regs */ \ + stdu r1,-STACKFRAMESIZE(r1); \ + std r31,STK_REG(r31)(r1); \ + std r30,STK_REG(r30)(r1); \ + std r29,STK_REG(r29)(r1); \ + std r28,STK_REG(r28)(r1); \ + \ + /* save lr and hcall opcode */ \ + /* then get time, purr snapshot before hcall */ \ + mflr r31; \ + mr r30,r3; \ + mftb r29; \ +BEGIN_FTR_SECTION; \ + mfspr r28,SPRN_PURR; \ +END_FTR_SECTION_IFSET(CPU_FTR_PURR); + +#define HCALL_INST_POSTCALL \ + /* get time, purr snapshot after hcall */ \ + mftb r4; \ +BEGIN_FTR_SECTION; \ + mfspr r5,SPRN_PURR; \ +END_FTR_SECTION_IFSET(CPU_FTR_PURR); \ + \ + /* setup regs to call routine that stuffs stats */ \ + /* into per-cpu/per-call structure. */ \ + subf r4,r29,r4; \ + subf r5,r28,r5; \ + mr r29,r3; /* save hcall rc */ \ + mr r3,r30; \ + bl .update_hcall_stats; \ + \ + /* restore hcall rc, lr and non-volital regs */ \ + mr r3,r29; \ + mtlr r31; \ + ld r31,STK_REG(r31)(r1); \ + ld r30,STK_REG(r30)(r1); \ + ld r29,STK_REG(r29)(r1); \ + ld r28,STK_REG(r28)(r1); \ + addi r1,r1,STACKFRAMESIZE +#else + +#define STACKFRAMESIZE 0 +#define HCALL_INST_PRECALL nop +#define HCALL_INST_POSTCALL nop +#endif .text @@ -21,8 +71,12 @@ _GLOBAL(plpar_hcall_norets) mfcr r0 stw r0,8(r1) + HCALL_INST_PRECALL + HVSC /* invoke the hypervisor */ + HCALL_INST_POSTCALL + lwz r0,8(r1) mtcrf 0xff,r0 blr /* return r3 = status */ @@ -33,6 +87,8 @@ _GLOBAL(plpar_hcall) mfcr r0 stw r0,8(r1) + HCALL_INST_PRECALL + std r4,STK_PARM(r4)(r1) /* Save ret buffer */ mr r4,r5 @@ -50,6 +106,8 @@ _GLOBAL(plpar_hcall) std r6, 16(r12) std r7, 24(r12) + HCALL_INST_POSTCALL + lwz r0,8(r1) mtcrf 0xff,r0 @@ -61,6 +119,8 @@ _GLOBAL(plpar_hcall9) mfcr r0 stw r0,8(r1) + HCALL_INST_PRECALL + std r4,STK_PARM(r4)(r1) /* Save ret buffer */ mr r4,r5 @@ -86,6 +146,8 @@ _GLOBAL(plpar_hcall9) std r11,56(r12) std r12,64(r12) + HCALL_INST_POSTCALL + lwz r0,8(r1) mtcrf 0xff,r0 diff -Naupr powerpc/arch/powerpc/platforms/pseries/hvCall_inst.c powerpc.work/arch/powerpc/platforms/pseries/hvCall_inst.c --- powerpc/arch/powerpc/platforms/pseries/hvCall_inst.c 1970-01-01 00:00:00.000000000 +0000 +++ powerpc.work/arch/powerpc/platforms/pseries/hvCall_inst.c 2006-07-21 07:08:40.000000000 +0000 @@ -0,0 +1,44 @@ +/* + * Copyright (C) 2006 Mike Kravetz IBM Corporation + * + * Hypervisor Call Instrumentation + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#include <linux/kernel.h> +#include <linux/percpu.h> +#include <linux/debugfs.h> +#include <linux/seq_file.h> +#include <linux/cpumask.h> +#include <asm/hvcall.h> +#include <asm/firmware.h> + +DEFINE_PER_CPU(struct hcall_stats[MAX_HCALL_OPCODES+1], hcall_stats); + +/* + * Common update of the per-CPU/per-hcall statistics + */ +void update_hcall_stats(unsigned long opcode, + unsigned long tb_delta, + unsigned long purr_delta) +{ + unsigned long op_index = opcode >> 2; + struct hcall_stats *hs = &__get_cpu_var(hcall_stats[op_index]); + + hs->tb_total += tb_delta; + hs->purr_total += purr_delta; + hs->num_calls++; +} diff -Naupr powerpc/include/asm-powerpc/hvcall.h powerpc.work/include/asm-powerpc/hvcall.h --- powerpc/include/asm-powerpc/hvcall.h 2006-07-21 07:04:39.000000000 +0000 +++ powerpc.work/include/asm-powerpc/hvcall.h 2006-07-21 07:06:49.000000000 +0000 @@ -246,6 +246,15 @@ long plpar_hcall(unsigned long opcode, u #define PLPAR_HCALL9_BUFSIZE 9 long plpar_hcall9(unsigned long opcode, unsigned long *retbuf, ...); +/* For hcall instrumentation. One structure per-hcall, per-CPU */ +struct hcall_stats { + unsigned long num_calls; /* number of calls (on this CPU) */ + unsigned long tb_total; /* total wall time (mftb) of calls. */ + unsigned long purr_total; /* total cpu time (PURR) of calls. */ +}; +void update_hcall_stats(unsigned long opcode, unsigned long tb_delta, + unsigned long purr_delta); + #endif /* __ASSEMBLY__ */ #endif /* __KERNEL__ */ #endif /* _ASM_POWERPC_HVCALL_H */ ^ permalink raw reply [flat|nested] 6+ messages in thread
* [PATCH 3/3] powerpc: Instrument Hypervisor Calls: add debugfs file 2006-07-21 6:38 [PATCH 0/3] powerpc: Instrument Hypervisor Calls Mike Kravetz 2006-07-21 6:39 ` [PATCH 1/3] powerpc: Instrument Hypervisor Calls: merge headers Mike Kravetz 2006-07-21 6:41 ` [PATCH 2/3] powerpc: Instrument Hypervisor Calls: add instrumentation Mike Kravetz @ 2006-07-21 6:49 ` Mike Kravetz 2 siblings, 0 replies; 6+ messages in thread From: Mike Kravetz @ 2006-07-21 6:49 UTC (permalink / raw) To: Paul Mackerras; +Cc: linuxppc-dev Make statistics available via files in debugfs. -- Signed-off-by: Mike Kravetz <kravetz@us.ibm.com> diff -Naupr powerpc/arch/powerpc/platforms/pseries/hvCall_inst.c powerpc.work/arch/powerpc/platforms/pseries/hvCall_inst.c --- powerpc/arch/powerpc/platforms/pseries/hvCall_inst.c 2006-07-21 07:10:08.000000000 +0000 +++ powerpc.work/arch/powerpc/platforms/pseries/hvCall_inst.c 2006-07-21 07:11:00.000000000 +0000 @@ -42,3 +42,96 @@ void update_hcall_stats(unsigned long op hs->purr_total += purr_delta; hs->num_calls++; } + +/* + * Routines for displaying the statistics in debugfs + */ +static void *hc_start(struct seq_file *m, loff_t *pos) +{ + if ((int)*pos < MAX_HCALL_OPCODES) + return (void *)(unsigned long)(*pos + 1); + + return NULL; +} + +static void *hc_next(struct seq_file *m, void *p, loff_t * pos) +{ + ++*pos; + + return hc_start(m, pos); +} + +static void hc_stop(struct seq_file *m, void *p) +{ +} + +static int hc_show(struct seq_file *m, void *p) +{ + unsigned long h_num = (unsigned long)p; + struct hcall_stats *hs = (struct hcall_stats *)m->private; + + if (hs[h_num].num_calls) + seq_printf(m, "%lu %lu %lu %lu\n", h_num<<2, + hs[h_num].num_calls, + hs[h_num].tb_total, + hs[h_num].purr_total); + + return 0; +} + +static struct seq_operations hcall_inst_seq_ops = { + .start = hc_start, + .next = hc_next, + .stop = hc_stop, + .show = hc_show +}; + +static int hcall_inst_seq_open(struct inode *inode, struct file *file) +{ + int rc; + struct seq_file *seq; + + rc = seq_open(file, &hcall_inst_seq_ops); + seq = file->private_data; + seq->private = file->f_dentry->d_inode->u.generic_ip; + + return rc; +} + +static struct file_operations hcall_inst_seq_fops = { + .open = hcall_inst_seq_open, + .read = seq_read, + .llseek = seq_lseek, + .release = seq_release, +}; + +#define HCALL_ROOT_DIR "hcall_inst" +#define CPU_NAME_BUF_SIZE 32 + +static int __init hcall_inst_init(void) +{ + struct dentry *hcall_root; + struct dentry *hcall_file; + char cpu_name_buf[CPU_NAME_BUF_SIZE]; + int cpu; + + if (!firmware_has_feature(FW_FEATURE_LPAR)) + return 0; + + hcall_root = debugfs_create_dir(HCALL_ROOT_DIR, NULL); + if (!hcall_root) + return -ENOMEM; + + for_each_possible_cpu(cpu) { + snprintf(cpu_name_buf, CPU_NAME_BUF_SIZE, "cpu%d", cpu); + hcall_file = debugfs_create_file(cpu_name_buf, S_IRUGO, + hcall_root, + per_cpu(hcall_stats, cpu), + &hcall_inst_seq_fops); + if (!hcall_file) + return -ENOMEM; + } + + return 0; +} +__initcall(hcall_inst_init); ^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2006-07-21 12:15 UTC | newest] Thread overview: 6+ messages (download: mbox.gz follow: Atom feed -- links below jump to the message on this page -- 2006-07-21 6:38 [PATCH 0/3] powerpc: Instrument Hypervisor Calls Mike Kravetz 2006-07-21 6:39 ` [PATCH 1/3] powerpc: Instrument Hypervisor Calls: merge headers Mike Kravetz 2006-07-21 12:14 ` Stephen Rothwell 2006-07-21 6:41 ` [PATCH 2/3] powerpc: Instrument Hypervisor Calls: add instrumentation Mike Kravetz 2006-07-21 6:48 ` Mike Kravetz 2006-07-21 6:49 ` [PATCH 3/3] powerpc: Instrument Hypervisor Calls: add debugfs file Mike Kravetz
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