diff options
Diffstat (limited to 'external/meta-openembedded/meta-oe/recipes-benchmark/stressapptest/stressapptest/read_sysfs_for_cachesize.patch')
-rw-r--r-- | external/meta-openembedded/meta-oe/recipes-benchmark/stressapptest/stressapptest/read_sysfs_for_cachesize.patch | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/external/meta-openembedded/meta-oe/recipes-benchmark/stressapptest/stressapptest/read_sysfs_for_cachesize.patch b/external/meta-openembedded/meta-oe/recipes-benchmark/stressapptest/stressapptest/read_sysfs_for_cachesize.patch new file mode 100644 index 00000000..8c251aeb --- /dev/null +++ b/external/meta-openembedded/meta-oe/recipes-benchmark/stressapptest/stressapptest/read_sysfs_for_cachesize.patch @@ -0,0 +1,72 @@ +sysconf params like _SC_LEVEL1_DCACHE_LINESIZE are not universally +implemented, therefore check for them being available, if not there +then read the sysfs directly to get the value + +Upstream-Status: Pending +Signed-off-by: Khem Raj <raj.khem@gmail.com> +--- a/src/sat.cc ++++ b/src/sat.cc +@@ -1482,15 +1482,47 @@ int Sat::CpuCount() { + return sysconf(_SC_NPROCESSORS_CONF); + } + ++int Sat::ReadInt(const char *filename, int *value) { ++ char line[64]; ++ int fd = open(filename, O_RDONLY), err = -1; ++ ++ if (fd < 0) ++ return -1; ++ if (read(fd, line, sizeof(line)) > 0) { ++ *value = atoi(line); ++ err = 0; ++ } ++ ++ close(fd); ++ return err; ++} ++ + // Return the worst case (largest) cache line size of the various levels of + // cache actually prsent in the machine. + int Sat::CacheLineSize() { +- int max_linesize = sysconf(_SC_LEVEL1_DCACHE_LINESIZE); +- int linesize = sysconf(_SC_LEVEL2_CACHE_LINESIZE); ++ int max_linesize, linesize; ++#ifdef _SC_LEVEL1_DCACHE_LINESIZE ++ max_linesize = sysconf(_SC_LEVEL1_DCACHE_LINESIZE); ++#else ++ ReadInt("/sys/devices/system/cpu/cpu0/cache/index0/coherency_line_size", &max_linesize); ++#endif ++#ifdef _SC_LEVEL2_DCACHE_LINESIZE ++ linesize = sysconf(_SC_LEVEL2_DCACHE_LINESIZE); ++#else ++ ReadInt("/sys/devices/system/cpu/cpu0/cache/index1/coherency_line_size", &linesize); ++#endif + if (linesize > max_linesize) max_linesize = linesize; +- linesize = sysconf(_SC_LEVEL3_CACHE_LINESIZE); ++#ifdef _SC_LEVEL3_DCACHE_LINESIZE ++ linesize = sysconf(_SC_LEVEL3_DCACHE_LINESIZE); ++#else ++ ReadInt("/sys/devices/system/cpu/cpu0/cache/index2/coherency_line_size", &linesize); ++#endif + if (linesize > max_linesize) max_linesize = linesize; +- linesize = sysconf(_SC_LEVEL4_CACHE_LINESIZE); ++#ifdef _SC_LEVEL4_DCACHE_LINESIZE ++ linesize = sysconf(_SC_LEVEL4_DCACHE_LINESIZE); ++#else ++ ReadInt("/sys/devices/system/cpu/cpu0/cache/index3/coherency_line_size", &linesize); ++#endif + if (linesize > max_linesize) max_linesize = linesize; + return max_linesize; + } +--- a/src/sat.h ++++ b/src/sat.h +@@ -136,7 +136,8 @@ class Sat { + int CpuCount(); + // Return the worst-case (largest) cache line size of the system. + int CacheLineSize(); +- ++ // Read int values from kernel file system e.g. sysfs ++ int ReadInt(const char *filename, int *value); + // Collect error counts from threads. + int64 GetTotalErrorCount(); + |