X-Recipient: archive-cygwin AT delorie DOT com DomainKey-Signature: a=rsa-sha1; c=nofws; d=sourceware.org; h=list-id :list-unsubscribe:list-subscribe:list-archive:list-post :list-help:sender:reply-to:subject:to:references:from:reply-to :message-id:date:mime-version:in-reply-to:content-type :content-transfer-encoding; q=dns; s=default; b=cRWtXTQmrEsc1KFf P0YSqCjLD06x7o3/THMl47wnMaSvgRvNg2s7dmfi5s9XzfrtYxgjo4fwDc8jALCk ZVzoccuJinH3DEK7gHZ5Cxaye78gRbWu0zcJx/uzGDNructCe/d4dWNV0dlsJ7Sx LpYdceoFmsSPejq7x0IqK2dYyKA= DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=sourceware.org; h=list-id :list-unsubscribe:list-subscribe:list-archive:list-post :list-help:sender:reply-to:subject:to:references:from:reply-to :message-id:date:mime-version:in-reply-to:content-type :content-transfer-encoding; s=default; bh=N0u5X2s5myPDhzcMjOsRXP 44ZIE=; b=iZ6hcZuI3F28GtN0Uy/kaJNupP6Pe5W7F61UYgqa8qQZjzU2yTXzdq siNwfhsGWZMAJmAbV2DjjYoNihre1foRyiu1zBjKIaS4hoo5jm4pM4VQZ4ymNbkW Vqc/tIWiyS6jAoIFiKDwv56hvshd24Bz528tPcYXZ22k0UN1IUuP8= Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner AT cygwin DOT com Mail-Followup-To: cygwin AT cygwin DOT com Delivered-To: mailing list cygwin AT cygwin DOT com Authentication-Results: sourceware.org; auth=none X-Virus-Found: No X-Spam-SWARE-Status: No, score=-0.4 required=5.0 tests=AWL,BAYES_00,FREEMAIL_FROM,KAM_MXURI,RCVD_IN_DNSWL_NONE,SPF_PASS,T_RP_MATCHES_RCVD autolearn=no version=3.3.2 spammy=prince, Prince, H*F:D*aol.com, UD:mx.aol.com X-HELO: omr-m020e.mx.aol.com Reply-To: tprince AT intelretiree DOT com Subject: Re: time command does not show CPU time for MinGW binaries To: cygwin AT cygwin DOT com References: <7f12e332ab2678dec61d4f11f3112b94 AT poradnik-webmastera DOT com> From: "arrl via cygwin" Reply-To: arrl Message-ID: <22fec84a-26de-5bbd-4e49-5337cd8aedc4@aol.com> Date: Sun, 7 Jan 2018 13:34:03 -0500 User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.5.2 MIME-Version: 1.0 In-Reply-To: <7f12e332ab2678dec61d4f11f3112b94@poradnik-webmastera.com> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit x-aol-global-disposition: G x-aol-sid: 3039ac1add8d5a5269934459 X-AOL-IP: 65.189.93.33 Note-from-DJ: This may be spam On 1/7/2018 10:38 AM, daniel AT poradnik-webmastera DOT com wrote: > time command does not show CPU time for MinGW binaries. I have this > sample piece of code: > > #include > #include > > #define N 100000 > #define K 10000 > > double data[N]; > > int main() > { >     clock_t t = clock(); >     for (unsigned long n = 0; n < N; ++n) >         for (unsigned long k = 0; k < K; ++k) >             data[n] += data[n] * data[k]; > >     t = clock() - t; >     printf("Time %.3f\n", (double)t / CLOCKS_PER_SEC); > >     return 0; > } > > When I compile it using Cygwin's gcc, time shows CPU time (user time) as > expected: > > $ gcc -o test test.c -O3 > $ time ./test > Time 1.890 > > real    0m2,043s > user    0m1,890s > sys     0m0,000s > > However when code is compiled using MinGW's gcc, time reports 0.000 as a > user time. Note that clock() function still provides valid values: > > $ x86_64-w64-mingw32-gcc -o test test.c -O3 > $ time ./test > Time 1.889 > > real    0m1,998s > user    0m0,000s > sys     0m0,015s > > I have updated Cygwin to latest version today. > $ uname -r > 2.9.0(0.318/5/3) > > gcc (GCC) 6.4.0 > x86_64-w64-mingw32-gcc (GCC) 6.4.0 > > I am using Win10 Pro now. As I recall, it worked when I was using it > about year ago on Win7 Pro. So it is probably Win10 issue. > > Is this a known bug, or should I log a new one? Do you know if there is > any workaround? > > Daniel > I'd be surprised if a past or present cygwin could capture user or full sys time from a .exe not linked against cygwin dll. clock() relies on library code which is part of the .exe. -- Tim Prince -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple