From: Alexey Bayduraev <alexey.v.bayduraev@linux.intel.com>
To: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>, Namhyung Kim <namhyung@kernel.org>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@redhat.com>,
linux-kernel <linux-kernel@vger.kernel.org>,
Andi Kleen <ak@linux.intel.com>,
Adrian Hunter <adrian.hunter@intel.com>,
Alexander Antonov <alexander.antonov@linux.intel.com>,
Alexei Budankov <abudankov@huawei.com>,
Riccardo Mancini <rickyman7@gmail.com>
Subject: [PATCH v8 09/22] tools lib: Introduce bitmap_intersects() operation
Date: Wed, 30 Jun 2021 18:54:48 +0300 [thread overview]
Message-ID: <f75aa738d8ff8f9cffd7532d671f3ef3deb97a7c.1625065643.git.alexey.v.bayduraev@linux.intel.com> (raw)
In-Reply-To: <cover.1625065643.git.alexey.v.bayduraev@linux.intel.com>
Introduce bitmap_intersects() routine that tests whether
bitmaps bitmap1 and bitmap2 intersects. This routine will
be used during thread masks initialization.
Acked-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Namhyung Kim <namhyung@gmail.com>
Signed-off-by: Alexey Bayduraev <alexey.v.bayduraev@linux.intel.com>
---
tools/include/linux/bitmap.h | 11 +++++++++++
tools/lib/bitmap.c | 14 ++++++++++++++
2 files changed, 25 insertions(+)
diff --git a/tools/include/linux/bitmap.h b/tools/include/linux/bitmap.h
index 330dbf7509cc..9d959bc24859 100644
--- a/tools/include/linux/bitmap.h
+++ b/tools/include/linux/bitmap.h
@@ -18,6 +18,8 @@ int __bitmap_and(unsigned long *dst, const unsigned long *bitmap1,
int __bitmap_equal(const unsigned long *bitmap1,
const unsigned long *bitmap2, unsigned int bits);
void bitmap_clear(unsigned long *map, unsigned int start, int len);
+int __bitmap_intersects(const unsigned long *bitmap1,
+ const unsigned long *bitmap2, unsigned int bits);
#define BITMAP_FIRST_WORD_MASK(start) (~0UL << ((start) & (BITS_PER_LONG - 1)))
#define BITMAP_LAST_WORD_MASK(nbits) (~0UL >> (-(nbits) & (BITS_PER_LONG - 1)))
@@ -170,4 +172,13 @@ static inline int bitmap_equal(const unsigned long *src1,
return __bitmap_equal(src1, src2, nbits);
}
+static inline int bitmap_intersects(const unsigned long *src1,
+ const unsigned long *src2, unsigned int nbits)
+{
+ if (small_const_nbits(nbits))
+ return ((*src1 & *src2) & BITMAP_LAST_WORD_MASK(nbits)) != 0;
+ else
+ return __bitmap_intersects(src1, src2, nbits);
+}
+
#endif /* _PERF_BITOPS_H */
diff --git a/tools/lib/bitmap.c b/tools/lib/bitmap.c
index f4e914712b6f..db466ef7be9d 100644
--- a/tools/lib/bitmap.c
+++ b/tools/lib/bitmap.c
@@ -86,3 +86,17 @@ int __bitmap_equal(const unsigned long *bitmap1,
return 1;
}
+
+int __bitmap_intersects(const unsigned long *bitmap1,
+ const unsigned long *bitmap2, unsigned int bits)
+{
+ unsigned int k, lim = bits/BITS_PER_LONG;
+ for (k = 0; k < lim; ++k)
+ if (bitmap1[k] & bitmap2[k])
+ return 1;
+
+ if (bits % BITS_PER_LONG)
+ if ((bitmap1[k] & bitmap2[k]) & BITMAP_LAST_WORD_MASK(bits))
+ return 1;
+ return 0;
+}
--
2.19.0
next prev parent reply other threads:[~2021-06-30 15:56 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-30 15:54 [PATCH v8 00/22] Introduce threaded trace streaming for basic perf record operation Alexey Bayduraev
2021-06-30 15:54 ` [PATCH v8 01/22] perf record: Introduce thread affinity and mmap masks Alexey Bayduraev
2021-06-30 16:17 ` Arnaldo Carvalho de Melo
2021-06-30 16:28 ` Arnaldo Carvalho de Melo
2021-07-01 13:05 ` Bayduraev, Alexey V
2021-07-01 14:23 ` Arnaldo Carvalho de Melo
2021-06-30 15:54 ` [PATCH v8 02/22] perf record: Introduce thread specific data array Alexey Bayduraev
2021-06-30 16:26 ` Arnaldo Carvalho de Melo
2021-06-30 17:18 ` Arnaldo Carvalho de Melo
2021-06-30 15:54 ` [PATCH v8 03/22] perf record: Introduce thread local variable Alexey Bayduraev
2021-06-30 17:16 ` Arnaldo Carvalho de Melo
2021-07-01 17:22 ` Bayduraev, Alexey V
2021-06-30 15:54 ` [PATCH v8 04/22] perf record: Stop threads in the end of trace streaming Alexey Bayduraev
2021-06-30 15:54 ` [PATCH v8 05/22] perf record: Start threads in the beginning " Alexey Bayduraev
2021-06-30 17:21 ` Arnaldo Carvalho de Melo
2021-06-30 15:54 ` [PATCH v8 06/22] perf record: Introduce data file at mmap buffer object Alexey Bayduraev
2021-06-30 17:23 ` Arnaldo Carvalho de Melo
2021-07-01 16:41 ` Bayduraev, Alexey V
2021-07-01 17:28 ` Arnaldo Carvalho de Melo
2021-06-30 15:54 ` [PATCH v8 07/22] perf record: Introduce data transferred and compressed stats Alexey Bayduraev
2021-06-30 15:54 ` [PATCH v8 08/22] perf record: Init data file at mmap buffer object Alexey Bayduraev
2021-06-30 15:54 ` Alexey Bayduraev [this message]
2021-06-30 17:24 ` [PATCH v8 09/22] tools lib: Introduce bitmap_intersects() operation Arnaldo Carvalho de Melo
2021-06-30 17:33 ` Bayduraev, Alexey V
2021-06-30 17:42 ` Arnaldo Carvalho de Melo
2021-06-30 15:54 ` [PATCH v8 10/22] perf record: Introduce --threads=<spec> command line option Alexey Bayduraev
2021-06-30 17:28 ` Arnaldo Carvalho de Melo
2021-06-30 18:54 ` Bayduraev, Alexey V
2021-07-01 11:50 ` Bayduraev, Alexey V
2021-07-01 14:26 ` Arnaldo Carvalho de Melo
2021-07-01 18:14 ` Bayduraev, Alexey V
2021-06-30 15:54 ` [PATCH v8 11/22] perf record: Document parallel data streaming mode Alexey Bayduraev
2021-06-30 17:28 ` Arnaldo Carvalho de Melo
2021-06-30 15:54 ` [PATCH v8 12/22] perf report: Output data file name in raw trace dump Alexey Bayduraev
2021-06-30 18:36 ` Arnaldo Carvalho de Melo
2021-07-01 22:46 ` Bayduraev, Alexey V
2021-06-30 15:54 ` [PATCH v8 13/22] perf session: Move reader structure to the top Alexey Bayduraev
2021-06-30 15:54 ` [PATCH v8 14/22] perf session: Introduce reader_state in reader object Alexey Bayduraev
2021-06-30 15:54 ` [PATCH v8 15/22] perf session: Introduce reader objects in session object Alexey Bayduraev
2021-06-30 15:54 ` [PATCH v8 16/22] perf session: Introduce decompressor into trace reader object Alexey Bayduraev
2021-06-30 15:54 ` [PATCH v8 17/22] perf session: Move init into reader__init function Alexey Bayduraev
2021-06-30 15:54 ` [PATCH v8 18/22] perf session: Move map/unmap into reader__mmap function Alexey Bayduraev
2021-06-30 15:54 ` [PATCH v8 19/22] perf session: Load single file for analysis Alexey Bayduraev
2021-06-30 15:54 ` [PATCH v8 20/22] perf session: Load data directory files " Alexey Bayduraev
2021-07-02 10:30 ` Jiri Olsa
2021-07-02 12:04 ` Bayduraev, Alexey V
2021-06-30 15:55 ` [PATCH v8 21/22] perf session: Introduce READER_NODATA state Alexey Bayduraev
2021-07-01 10:08 ` Bayduraev, Alexey V
2021-06-30 15:55 ` [PATCH v8 22/22] perf record: Introduce record__bytes_written and fix --max-size option Alexey Bayduraev
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