This patch improves the robutness of the build_cpu_topo() routine by allowing either the CPU parsing or the thread parsing to fail and yet get perf to produce some topology data which could be useful for the analysis. Without this patch, if the cpu parsing fails, the thread parsing is not attempted vice-versa.
Signed-off-by: Stephane Eranian <[email protected]> --- diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c index f558f83..c993204 100644 --- a/tools/perf/util/header.c +++ b/tools/perf/util/header.c @@ -716,18 +716,19 @@ static int build_cpu_topo(struct cpu_topo *tp, int cpu) char filename[MAXPATHLEN]; char *buf = NULL, *p; size_t len = 0; + ssize_t sret; u32 i = 0; int ret = -1; sprintf(filename, CORE_SIB_FMT, cpu); fp = fopen(filename, "r"); if (!fp) - return -1; - - if (getline(&buf, &len, fp) <= 0) - goto done; - + goto try_threads; + + sret = getline(&buf, &len, fp); fclose(fp); + if (sret <= 0) + goto try_threads; p = strchr(buf, '\n'); if (p) @@ -743,7 +744,9 @@ static int build_cpu_topo(struct cpu_topo *tp, int cpu) buf = NULL; len = 0; } + ret = 0; +try_threads: sprintf(filename, THRD_SIB_FMT, cpu); fp = fopen(filename, "r"); if (!fp) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
