Message ID | 20201221161042.944286-3-npiggin@gmail.com |
---|---|
State | Superseded |
Headers | show
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[193.116.97.30]) by smtp.gmail.com with ESMTPSA id y16sm8302359pgg.20.2020.12.21.08.10.52 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 21 Dec 2020 08:10:54 -0800 (PST) From: Nicholas Piggin <npiggin@gmail.com> To: skiboot@lists.ozlabs.org Date: Tue, 22 Dec 2020 02:10:38 +1000 Message-Id: <20201221161042.944286-3-npiggin@gmail.com> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20201221161042.944286-1-npiggin@gmail.com> References: <20201221161042.944286-1-npiggin@gmail.com> MIME-Version: 1.0 Subject: [Skiboot] [PATCH 2/6] core/cpu: remove POWER8 IPI loop X-BeenThere: skiboot@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Mailing list for skiboot development <skiboot.lists.ozlabs.org> List-Unsubscribe: <https://lists.ozlabs.org/options/skiboot>, <mailto:skiboot-request@lists.ozlabs.org?subject=unsubscribe> List-Archive: <http://lists.ozlabs.org/pipermail/skiboot/> List-Post: <mailto:skiboot@lists.ozlabs.org> List-Help: <mailto:skiboot-request@lists.ozlabs.org?subject=help> List-Subscribe: <https://lists.ozlabs.org/listinfo/skiboot>, <mailto:skiboot-request@lists.ozlabs.org?subject=subscribe> Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: skiboot-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Skiboot" <skiboot-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org> |
Series |
idle synchronisation rewrite
|
expand
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diff --git a/core/cpu.c b/core/cpu.c index cbff6d709..2c2b678ff 100644 --- a/core/cpu.c +++ b/core/cpu.c @@ -597,10 +597,8 @@ static void reconfigure_idle_start(void) if (proc_gen == proc_gen_p8) { for_each_available_cpu(cpu) { - while (cpu->in_sleep || cpu->in_idle) { + if (cpu->in_sleep || cpu->in_idle) icp_kick_cpu(cpu); - cpu_relax(); - } } } else if (proc_gen == proc_gen_p9) { for_each_available_cpu(cpu) {
POWER8 should not have to loop sending IPIs until the destination wakes up. One should be enough. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> --- core/cpu.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-)