From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from [208.74.158.174] (helo=mail3.candelatech.com) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1hK0nG-0001aT-Da for ath10k@lists.infradead.org; Fri, 26 Apr 2019 13:21:36 +0000 Subject: Re: [PATCHv2] ath10k: Add wrapper function to ath10k debug References: <1556283505-29539-1-git-send-email-vnaralas@codeaurora.org> From: Ben Greear Message-ID: Date: Fri, 26 Apr 2019 06:21:31 -0700 MIME-Version: 1.0 In-Reply-To: <1556283505-29539-1-git-send-email-vnaralas@codeaurora.org> Content-Language: en-US List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: "ath10k" Errors-To: ath10k-bounces+kvalo=adurom.com@lists.infradead.org To: Venkateswara Naralasetty , ath10k@lists.infradead.org Cc: Kan Yan , linux-wireless@vger.kernel.org On 4/26/19 5:58 AM, Venkateswara Naralasetty wrote: > ath10k_dbg() is called in ath10k_process_rx() with huge set of arguments > which is causing CPU overhead even when debug_mask is not set. > Good improvement was observed in the receive side performance when call > to ath10k_dbg() is avoided in the RX path. > > Since currently all debug messages are sent via tracing infrastructure, > we cannot entirely avoid calling ath10k_dbg. Therefore, call to > ath10k_dbg() is made conditional based on tracing config in the driver. > > Trasmit performance remains unchanged with this patch; below are some > experimental results with this patch and tracing disabled. > > mesh mode: > > w/o this patch with this patch > Traffic TP CPU Usage TP CPU usage > > TCP 840Mbps 76.53% 960Mbps 78.14% > UDP 1030Mbps 74.58% 1132Mbps 74.31% > > Infra mode: > > w/o this patch with this patch > Traffic TP CPU Usage TP CPU usage > > TCP Rx 1241Mbps 80.89% 1270Mbps 73.50% > UDP Rx 1433Mbps 81.77% 1472Mbps 72.80% > > Tested platform : IPQ8064 > hardware used : QCA9984 > firmware ver : ver 10.4-3.5.3-00057 > > Signed-off-by: Kan Yan > Signed-off-by: Venkateswara Naralasetty > --- > v2: > * changed trace enabled check from IS_ENABLED(CONFIG_ATH10K_TRACING) > * to trace_ath10k_log_dbg_enabled(). > > drivers/net/wireless/ath/ath10k/core.c | 2 ++ > drivers/net/wireless/ath/ath10k/debug.c | 8 ++++---- > drivers/net/wireless/ath/ath10k/debug.h | 22 ++++++++++++++++------ > drivers/net/wireless/ath/ath10k/trace.c | 1 + > drivers/net/wireless/ath/ath10k/trace.h | 6 +++++- > 5 files changed, 28 insertions(+), 11 deletions(-) > > diff --git a/drivers/net/wireless/ath/ath10k/core.c b/drivers/net/wireless/ath/ath10k/core.c > index cfd7bb2..ab709bf 100644 > --- a/drivers/net/wireless/ath/ath10k/core.c > +++ b/drivers/net/wireless/ath/ath10k/core.c > @@ -26,6 +26,8 @@ > #include "coredump.h" > > unsigned int ath10k_debug_mask; > +EXPORT_SYMBOL(ath10k_debug_mask); > + > static unsigned int ath10k_cryptmode_param; > static bool uart_print; > static bool skip_otp; > diff --git a/drivers/net/wireless/ath/ath10k/debug.c b/drivers/net/wireless/ath/ath10k/debug.c > index 32d967a..1b63929 100644 > --- a/drivers/net/wireless/ath/ath10k/debug.c > +++ b/drivers/net/wireless/ath/ath10k/debug.c > @@ -2620,8 +2620,8 @@ void ath10k_debug_unregister(struct ath10k *ar) > #endif /* CONFIG_ATH10K_DEBUGFS */ > > #ifdef CONFIG_ATH10K_DEBUG > -void ath10k_dbg(struct ath10k *ar, enum ath10k_debug_mask mask, > - const char *fmt, ...) > +void __ath10k_dbg(struct ath10k *ar, enum ath10k_debug_mask mask, > + const char *fmt, ...) > { > struct va_format vaf; > va_list args; Do you still need the check later in this method: if (ath10k_debug_mask & mask) since you already checked in the ath10k_dbg() macro? Thanks, Ben -- Ben Greear Candela Technologies Inc http://www.candelatech.com _______________________________________________ ath10k mailing list ath10k@lists.infradead.org http://lists.infradead.org/mailman/listinfo/ath10k