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[2603:8001:2900:d1ce:5830:72d7:a38c:58e8]) by smtp.gmail.com with ESMTPSA id h18sm49138671pfo.172.2021.01.01.10.22.38 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 01 Jan 2021 10:22:38 -0800 (PST) Subject: Re: [PATCH] sh: add support for TIF_NOTIFY_SIGNAL To: John Paul Adrian Glaubitz Cc: linux-sh@vger.kernel.org, "linux-ia64@vger.kernel.org" References: <5fcc82b4-89ae-3bca-10ab-6ad933565cee@kernel.dk> <5611bde9-67e7-6ff6-defc-9b02ea830fac@physik.fu-berlin.de> <9ea14eb3-d698-5499-ba4c-c6a3c35cd8d4@kernel.dk> <47f79645-53b7-b11c-167a-f5721b53df02@physik.fu-berlin.de> <9d9acec6-1e8c-2d68-5dfa-d58c11cf5cc4@kernel.dk> <070780c4-445e-6373-c8f4-1c72d0f3b4e0@physik.fu-berlin.de> <1047f3e5-4599-c34f-3176-9f41d2e1246b@kernel.dk> <31b34cfc-8d6e-d3b4-e29f-1ec485f5b368@physik.fu-berlin.de> <23bf4423-0987-c445-d5cd-1922e1e40820@kernel.dk> <10752e73-ca2a-9ea7-4aa6-35e366e36fb0@kernel.dk> From: Jens Axboe Message-ID: <4acdfb5b-842f-aba4-0f6c-20b4795ded35@kernel.dk> Date: Fri, 1 Jan 2021 11:22:37 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-sh@vger.kernel.org On 1/1/21 11:16 AM, John Paul Adrian Glaubitz wrote: > On 1/1/21 4:35 PM, Jens Axboe wrote:> It's supposed to finish very quickly: >> >> axboe@p1 ~> time ./socket-rw 0.000s >> >> ________________________________________________________ >> Executed in 1.10 millis fish external >> usr time 888.00 micros 278.00 micros 610.00 micros >> sys time 35.00 micros 35.00 micros 0.00 micros >> >> If it doesn't, can you try: >> >> # echo 1 > /sys/kernel/debug/tracing/events/io_uring/enable >> >> Then run the socket-rw app, and then do: >> >> # cat /sys/kernel/debug/tracing/trace >> >> and send that output? Might also be useful to include the strace >> of the socket-rw just in case, so maybe run it ala >> >> strace -o foo ./socket-rw >> >> and include foo in the reply as well. > > Odd, I just ran it through strace and it exited immediately: That looks correct, it sets up a ring, issues and waits for two requests. Both of those requests require TWA_SIGNAL processing. -- Jens Axboe From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jens Axboe Date: Fri, 01 Jan 2021 18:22:37 +0000 Subject: Re: [PATCH] sh: add support for TIF_NOTIFY_SIGNAL Message-Id: <4acdfb5b-842f-aba4-0f6c-20b4795ded35@kernel.dk> List-Id: References: <5fcc82b4-89ae-3bca-10ab-6ad933565cee@kernel.dk> <5611bde9-67e7-6ff6-defc-9b02ea830fac@physik.fu-berlin.de> <9ea14eb3-d698-5499-ba4c-c6a3c35cd8d4@kernel.dk> <47f79645-53b7-b11c-167a-f5721b53df02@physik.fu-berlin.de> <9d9acec6-1e8c-2d68-5dfa-d58c11cf5cc4@kernel.dk> <070780c4-445e-6373-c8f4-1c72d0f3b4e0@physik.fu-berlin.de> <1047f3e5-4599-c34f-3176-9f41d2e1246b@kernel.dk> <31b34cfc-8d6e-d3b4-e29f-1ec485f5b368@physik.fu-berlin.de> <23bf4423-0987-c445-d5cd-1922e1e40820@kernel.dk> <10752e73-ca2a-9ea7-4aa6-35e366e36fb0@kernel.dk> In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: John Paul Adrian Glaubitz Cc: linux-sh@vger.kernel.org, "linux-ia64@vger.kernel.org" On 1/1/21 11:16 AM, John Paul Adrian Glaubitz wrote: > On 1/1/21 4:35 PM, Jens Axboe wrote:> It's supposed to finish very quickly: >> >> axboe@p1 ~> time ./socket-rw 0.000s >> >> ________________________________________________________ >> Executed in 1.10 millis fish external >> usr time 888.00 micros 278.00 micros 610.00 micros >> sys time 35.00 micros 35.00 micros 0.00 micros >> >> If it doesn't, can you try: >> >> # echo 1 > /sys/kernel/debug/tracing/events/io_uring/enable >> >> Then run the socket-rw app, and then do: >> >> # cat /sys/kernel/debug/tracing/trace >> >> and send that output? Might also be useful to include the strace >> of the socket-rw just in case, so maybe run it ala >> >> strace -o foo ./socket-rw >> >> and include foo in the reply as well. > > Odd, I just ran it through strace and it exited immediately: That looks correct, it sets up a ring, issues and waits for two requests. Both of those requests require TWA_SIGNAL processing. -- Jens Axboe