On Fri, 2007-10-26 at 13:59 +0900, Tsutomu OWA wrote: > Hello Darren Hart, > > At Fri, 20 Jul 2007 15:40:58 -0700, Darren Hart wrote: > > Please download the tarball, give the updated documentation a cursory glance > > and give them a go on your -rt system. Please post your experience here as > > well as any questions or problems you may run into. > > This patch adds powerpc version of rdtscll() macro which actually reads > the timebase register and powerpc version of atomic_inc() to compile. > Compile and run tested on a Celleb (a powerpc64 machine). Thank you for the patch. I think we should perhaps move all the rdtscl stuff into a header file with a more generic name.. rdsystimer or something. Would you mind resending your patch with a: Signed-off-by: Your Name <your_email_address> So I can properly track the origin and credit you in the changelogs. > > Comments and suggestions are welcome. > > By the way, would you mind if I use and/or refer to your test > results found at http://www.kernel.org/pub/linux/kernel/people/dvhart/ols2007/ to compare with the results taken on powerpc? I'm going to present > the test results at the ELC/E2007 (Embedded Linux Conference Europe; > http://www.celinux.org/elc_europe07/elc_europe_index.html). Please feel free to use the results, but do site the ols2007 publication as the source. --Darren Hart > > thanks for your understanding! > -- owa > Corprate Software Engineering Center, TOSHIBA > > diff -rup rt-test-0.3.org/func/async_handler/async_handler_tsc.c rt-test-0.3/func/async_handler/async_handler_tsc.c > --- rt-test-0.3.org/func/async_handler/async_handler_tsc.c 2007-07-21 00:32:57.000000000 +0900 > +++ rt-test-0.3/func/async_handler/async_handler_tsc.c 2007-10-17 19:55:34.000000000 +0900 > @@ -65,6 +65,16 @@ pthread_mutex_t mutex; > __asm__ __volatile__ ("rdtsc" : "=a" (low), "=d" (high)); \ > val = (uint64_t)high << 32 | low; \ > } while(0) > +#elif defined(__powerpc__) /* 32bit version */ > +#define rdtscll(val) \ > + do { \ > + uint32_t tbhi, tblo ; \ > + __asm__ __volatile__ ("mftbu %0" : "=r" (tbhi)); \ > + __asm__ __volatile__ ("mftbl %0" : "=r" (tblo)); \ > + val = 1000 * ((uint64_t) tbhi << 32) | tblo; \ > + } while(0) > +#else > +#error > #endif > > /* return difference in microseconds */ > diff -rup rt-test-0.3.org/func/measurement/preempt_timing.c rt-test-0.3/func/measurement/preempt_timing.c > --- rt-test-0.3.org/func/measurement/preempt_timing.c 2007-07-21 00:32:56.000000000 +0900 > +++ rt-test-0.3/func/measurement/preempt_timing.c 2007-10-17 19:56:56.000000000 +0900 > @@ -50,6 +50,16 @@ > __asm__ __volatile__ ("rdtsc" : "=a" (low), "=d" (high)); \ > val = (uint64_t)high << 32 | low; \ > } while(0) > +#elif defined(__powerpc__) /* 32bit version */ > +#define rdtscll(val) \ > + do { \ > + uint32_t tbhi, tblo ; \ > + __asm__ __volatile__ ("mftbu %0" : "=r" (tbhi)); \ > + __asm__ __volatile__ ("mftbl %0" : "=r" (tblo)); \ > + val = 1000 * ((uint64_t) tbhi <<32) | tblo; \ > + } while(0) > +#else > +#error > #endif > > #define ITERATIONS 1000000ULL > diff -rup rt-test-0.3.org/func/measurement/rdtsc-latency.c rt-test-0.3/func/measurement/rdtsc-latency.c > --- rt-test-0.3.org/func/measurement/rdtsc-latency.c 2007-07-21 00:32:56.000000000 +0900 > +++ rt-test-0.3/func/measurement/rdtsc-latency.c 2007-10-17 19:57:31.000000000 +0900 > @@ -42,6 +42,16 @@ > __asm__ __volatile__ ("rdtsc" : "=a" (low), "=d" (high)); \ > val = (uint64_t)high << 32 | low; \ > } while(0) > +#elif defined(__powerpc__) /* 32 bit version */ > +#define rdtscll(val) \ > + do { \ > + uint32_t tbhi, tblo ; \ > + __asm__ __volatile__ ("mftbu %0" : "=r" (tbhi)); \ > + __asm__ __volatile__ ("mftbl %0" : "=r" (tblo)); \ > + val = 1000 * ((uint64_t) tbhi <<32) | tblo; \ > + } while(0) > +#else > +#error > #endif > > /* return difference in nanoseconds */ > diff -rup rt-test-0.3.org/include/librt.h rt-test-0.3/include/librt.h > --- rt-test-0.3.org/include/librt.h 2007-07-21 00:32:56.000000000 +0900 > +++ rt-test-0.3/include/librt.h 2007-10-16 18:19:08.000000000 +0900 > @@ -92,6 +92,7 @@ extern int _dbg_lvl; > */ > static inline int atomic_add(int i, atomic_t *v) > { > +#if defined(__x86_64__) || defined(__i386__) > int __i; > __i = i; > asm volatile( > @@ -99,6 +100,26 @@ static inline int atomic_add(int i, atom > :"=r"(i) > :"m"(v->counter), "0"(i)); > return i + __i; > + > +#elif defined(__powerpc__) > +#define ISYNC_ON_SMP "\n\tisync\n" > +#define LWSYNC_ON_SMP __stringify(LWSYNC) "\n" > + int t; > + asm volatile( > +" lwsync \n\ > +1: lwarx %0,0,%2 # atomic_add_return \n\ > + add %0,%1,%0\n\ > + stwcx. %0,0,%2 \n\ > + bne- 1b" > + ISYNC_ON_SMP > + : "=&r" (t) > + : "r" (i), "r" (&v->counter) > + : "cc", "memory"); > + > + return t; > +#else > +#error > +#endif > } > /* atomic_inc: atomically increment the integer passed by reference > */ - To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
