Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752597AbcLFCdB (ORCPT ); Mon, 5 Dec 2016 21:33:01 -0500 Received: from mail-wj0-f194.google.com ([209.85.210.194]:35944 "EHLO mail-wj0-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752203AbcLFCcl (ORCPT ); Mon, 5 Dec 2016 21:32:41 -0500 From: Frederic Weisbecker To: LKML Cc: Frederic Weisbecker , Tony Luck , Wanpeng Li , Peter Zijlstra , Michael Ellerman , Heiko Carstens , Benjamin Herrenschmidt , Thomas Gleixner , Paul Mackerras , Ingo Molnar , Fenghua Yu , Rik van Riel , Martin Schwidefsky , Stanislaw Gruszka Subject: [PATCH 05/10] powerpc: Prepare accounting structure for cputime flush on tick Date: Tue, 6 Dec 2016 03:32:18 +0100 Message-Id: <1480991543-6557-6-git-send-email-fweisbec@gmail.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1480991543-6557-1-git-send-email-fweisbec@gmail.com> References: <1480991543-6557-1-git-send-email-fweisbec@gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 6739 Lines: 186 In order to prepare for CONFIG_VIRT_CPU_ACCOUNTING_NATIVE to delay cputime accounting to the tick, provide finegrained accumulators to powerpc in order to store the cputime until flushing. While at it, normalize the name of several fields according to common cputime naming. Cc: Benjamin Herrenschmidt Cc: Paul Mackerras Cc: Michael Ellerman Cc: Heiko Carstens Cc: Martin Schwidefsky Cc: Tony Luck Cc: Fenghua Yu Cc: Peter Zijlstra Cc: Rik van Riel Cc: Thomas Gleixner Cc: Ingo Molnar Cc: Stanislaw Gruszka Cc: Wanpeng Li Signed-off-by: Frederic Weisbecker --- arch/powerpc/include/asm/accounting.h | 14 +++++++++++--- arch/powerpc/kernel/asm-offsets.c | 8 ++++---- arch/powerpc/kernel/time.c | 31 ++++++++++++++++--------------- arch/powerpc/xmon/xmon.c | 6 +++--- 4 files changed, 34 insertions(+), 25 deletions(-) diff --git a/arch/powerpc/include/asm/accounting.h b/arch/powerpc/include/asm/accounting.h index c133246..3abcf98 100644 --- a/arch/powerpc/include/asm/accounting.h +++ b/arch/powerpc/include/asm/accounting.h @@ -12,9 +12,17 @@ /* Stuff for accurate time accounting */ struct cpu_accounting_data { - unsigned long user_time; /* accumulated usermode TB ticks */ - unsigned long system_time; /* accumulated system TB ticks */ - unsigned long user_time_scaled; /* accumulated usermode SPURR ticks */ + /* Accumulated cputime values to flush on ticks*/ + unsigned long utime; + unsigned long stime; + unsigned long utime_scaled; + unsigned long stime_scaled; + unsigned long gtime; + unsigned long hardirq_time; + unsigned long softirq_time; + unsigned long steal_time; + unsigned long idle_time; + /* Internal counters */ unsigned long starttime; /* TB value snapshot */ unsigned long starttime_user; /* TB value on exit to usermode */ unsigned long startspurr; /* SPURR value snapshot */ diff --git a/arch/powerpc/kernel/asm-offsets.c b/arch/powerpc/kernel/asm-offsets.c index caec7bf..170319d 100644 --- a/arch/powerpc/kernel/asm-offsets.c +++ b/arch/powerpc/kernel/asm-offsets.c @@ -249,9 +249,9 @@ int main(void) DEFINE(ACCOUNT_STARTTIME_USER, offsetof(struct paca_struct, accounting.starttime_user)); DEFINE(ACCOUNT_USER_TIME, - offsetof(struct paca_struct, accounting.user_time)); + offsetof(struct paca_struct, accounting.utime)); DEFINE(ACCOUNT_SYSTEM_TIME, - offsetof(struct paca_struct, accounting.system_time)); + offsetof(struct paca_struct, accounting.stime)); DEFINE(PACA_TRAP_SAVE, offsetof(struct paca_struct, trap_save)); DEFINE(PACA_NAPSTATELOST, offsetof(struct paca_struct, nap_state_lost)); DEFINE(PACA_SPRG_VDSO, offsetof(struct paca_struct, sprg_vdso)); @@ -262,9 +262,9 @@ int main(void) DEFINE(ACCOUNT_STARTTIME_USER, offsetof(struct thread_info, accounting.starttime_user)); DEFINE(ACCOUNT_USER_TIME, - offsetof(struct thread_info, accounting.user_time)); + offsetof(struct thread_info, accounting.utime)); DEFINE(ACCOUNT_SYSTEM_TIME, - offsetof(struct thread_info, accounting.system_time)); + offsetof(struct thread_info, accounting.stime)); #endif #endif /* CONFIG_PPC64 */ diff --git a/arch/powerpc/kernel/time.c b/arch/powerpc/kernel/time.c index bca2781..613acb4 100644 --- a/arch/powerpc/kernel/time.c +++ b/arch/powerpc/kernel/time.c @@ -271,8 +271,8 @@ void accumulate_stolen_time(void) sst = scan_dispatch_log(acct->starttime_user); ust = scan_dispatch_log(acct->starttime); - acct->system_time -= sst; - acct->user_time -= ust; + acct->stime -= sst; + acct->utime -= ust; local_paca->stolen_time += ust + sst; local_paca->soft_enabled = save_soft_enabled; @@ -281,10 +281,11 @@ void accumulate_stolen_time(void) static inline u64 calculate_stolen_time(u64 stop_tb) { u64 stolen = 0; + struct cpu_accounting_data *acct = &local_paca->accounting; if (get_paca()->dtl_ridx != be64_to_cpu(get_lppaca()->dtl_idx)) { stolen = scan_dispatch_log(stop_tb); - get_paca()->accounting.system_time -= stolen; + acct->stime -= stolen; } stolen += get_paca()->stolen_time; @@ -316,17 +317,17 @@ static unsigned long vtime_delta(struct task_struct *tsk, now = mftb(); nowscaled = read_spurr(now); - acct->system_time += now - acct->starttime; + acct->stime += now - acct->starttime; acct->starttime = now; deltascaled = nowscaled - acct->startspurr; acct->startspurr = nowscaled; *stolen = calculate_stolen_time(now); - delta = acct->system_time; - acct->system_time = 0; - udelta = acct->user_time - acct->utime_sspurr; - acct->utime_sspurr = acct->user_time; + delta = acct->stime; + acct->stime = 0; + udelta = acct->utime - acct->utime_sspurr; + acct->utime_sspurr = acct->utime; /* * Because we don't read the SPURR on every kernel entry/exit, @@ -348,7 +349,7 @@ static unsigned long vtime_delta(struct task_struct *tsk, *sys_scaled = deltascaled; } } - acct->user_time_scaled += user_scaled; + acct->utime_scaled += user_scaled; return delta; } @@ -387,10 +388,10 @@ void vtime_account_user(struct task_struct *tsk) cputime_t utime, utimescaled; struct cpu_accounting_data *acct = get_accounting(tsk); - utime = acct->user_time; - utimescaled = acct->user_time_scaled; - acct->user_time = 0; - acct->user_time_scaled = 0; + utime = acct->utime; + utimescaled = acct->utime_scaled; + acct->utime = 0; + acct->utime_scaled = 0; acct->utime_sspurr = 0; account_user_time(tsk, utime); tsk->utimescaled += utimescaled; @@ -408,8 +409,8 @@ void arch_vtime_task_switch(struct task_struct *prev) acct->starttime = get_accounting(prev)->starttime; acct->startspurr = get_accounting(prev)->startspurr; - acct->system_time = 0; - acct->user_time = 0; + acct->stime = 0; + acct->utime = 0; } #endif /* CONFIG_PPC32 */ diff --git a/arch/powerpc/xmon/xmon.c b/arch/powerpc/xmon/xmon.c index 7605455..0a3a3e8 100644 --- a/arch/powerpc/xmon/xmon.c +++ b/arch/powerpc/xmon/xmon.c @@ -2284,9 +2284,9 @@ static void dump_one_paca(int cpu) DUMP(p, subcore_sibling_mask, "x"); #endif - DUMP(p, accounting.user_time, "llx"); - DUMP(p, accounting.system_time, "llx"); - DUMP(p, accounting.user_time_scaled, "llx"); + DUMP(p, accounting.utime, "llx"); + DUMP(p, accounting.stime, "llx"); + DUMP(p, accounting.utime_scaled, "llx"); DUMP(p, accounting.starttime, "llx"); DUMP(p, accounting.starttime_user, "llx"); DUMP(p, accounting.startspurr, "llx"); -- 2.7.4