1923 g1h->verify_region_sets_optional();
1924
1925 if (VerifyDuringGC) {
1926 HandleMark hm; // handle scope
1927 g1h->prepare_for_verify();
1928 Universe::verify(VerifyOption_G1UsePrevMarking,
1929 " VerifyDuringGC:(before)");
1930 }
1931 g1h->check_bitmaps("Cleanup Start");
1932
1933 G1CollectorPolicy* g1p = g1h->g1_policy();
1934 g1p->record_concurrent_mark_cleanup_start();
1935
1936 double start = os::elapsedTime();
1937
1938 HeapRegionRemSet::reset_for_cleanup_tasks();
1939
1940 // Do counting once more with the world stopped for good measure.
1941 G1ParFinalCountTask g1_par_count_task(g1h, &_region_bm, &_card_bm);
1942
1943 uint n_workers = _g1h->workers()->active_workers();
1944
1945 g1h->workers()->run_task(&g1_par_count_task);
1946
1947 if (VerifyDuringGC) {
1948 // Verify that the counting data accumulated during marking matches
1949 // that calculated by walking the marking bitmap.
1950
1951 // Bitmaps to hold expected values
1952 BitMap expected_region_bm(_region_bm.size(), true);
1953 BitMap expected_card_bm(_card_bm.size(), true);
1954
1955 G1ParVerifyFinalCountTask g1_par_verify_task(g1h,
1956 &_region_bm,
1957 &_card_bm,
1958 &expected_region_bm,
1959 &expected_card_bm);
1960
1961 g1h->workers()->run_task(&g1_par_verify_task);
1962
1963 guarantee(g1_par_verify_task.failures() == 0, "Unexpected accounting failures");
1964 }
1965
1966 size_t start_used_bytes = g1h->used();
1967 g1h->set_marking_complete();
1968
1969 double count_end = os::elapsedTime();
1970 double this_final_counting_time = (count_end - start);
1971 _total_counting_time += this_final_counting_time;
1972
1973 if (G1PrintRegionLivenessInfo) {
1974 G1PrintRegionLivenessInfoClosure cl(gclog_or_tty, "Post-Marking");
1975 _g1h->heap_region_iterate(&cl);
1976 }
1977
1978 // Install newly created mark bitMap as "prev".
1979 swapMarkBitMaps();
1980
1981 g1h->reset_gc_time_stamp();
1982
1983 // Note end of marking in all heap regions.
1984 G1ParNoteEndTask g1_par_note_end_task(g1h, &_cleanup_list, n_workers);
1985 g1h->workers()->run_task(&g1_par_note_end_task);
1986 g1h->check_gc_time_stamps();
1987
1988 if (!cleanup_list_is_empty()) {
1989 // The cleanup list is not empty, so we'll have to process it
1990 // concurrently. Notify anyone else that might be wanting free
1991 // regions that there will be more free regions coming soon.
1992 g1h->set_free_regions_coming();
1993 }
1994
1995 // call below, since it affects the metric by which we sort the heap
1996 // regions.
1997 if (G1ScrubRemSets) {
1998 double rs_scrub_start = os::elapsedTime();
1999 G1ParScrubRemSetTask g1_par_scrub_rs_task(g1h, &_region_bm, &_card_bm, n_workers);
2000 g1h->workers()->run_task(&g1_par_scrub_rs_task);
2001
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1923 g1h->verify_region_sets_optional();
1924
1925 if (VerifyDuringGC) {
1926 HandleMark hm; // handle scope
1927 g1h->prepare_for_verify();
1928 Universe::verify(VerifyOption_G1UsePrevMarking,
1929 " VerifyDuringGC:(before)");
1930 }
1931 g1h->check_bitmaps("Cleanup Start");
1932
1933 G1CollectorPolicy* g1p = g1h->g1_policy();
1934 g1p->record_concurrent_mark_cleanup_start();
1935
1936 double start = os::elapsedTime();
1937
1938 HeapRegionRemSet::reset_for_cleanup_tasks();
1939
1940 // Do counting once more with the world stopped for good measure.
1941 G1ParFinalCountTask g1_par_count_task(g1h, &_region_bm, &_card_bm);
1942
1943 g1h->workers()->run_task(&g1_par_count_task);
1944
1945 if (VerifyDuringGC) {
1946 // Verify that the counting data accumulated during marking matches
1947 // that calculated by walking the marking bitmap.
1948
1949 // Bitmaps to hold expected values
1950 BitMap expected_region_bm(_region_bm.size(), true);
1951 BitMap expected_card_bm(_card_bm.size(), true);
1952
1953 G1ParVerifyFinalCountTask g1_par_verify_task(g1h,
1954 &_region_bm,
1955 &_card_bm,
1956 &expected_region_bm,
1957 &expected_card_bm);
1958
1959 g1h->workers()->run_task(&g1_par_verify_task);
1960
1961 guarantee(g1_par_verify_task.failures() == 0, "Unexpected accounting failures");
1962 }
1963
1964 size_t start_used_bytes = g1h->used();
1965 g1h->set_marking_complete();
1966
1967 double count_end = os::elapsedTime();
1968 double this_final_counting_time = (count_end - start);
1969 _total_counting_time += this_final_counting_time;
1970
1971 if (G1PrintRegionLivenessInfo) {
1972 G1PrintRegionLivenessInfoClosure cl(gclog_or_tty, "Post-Marking");
1973 _g1h->heap_region_iterate(&cl);
1974 }
1975
1976 // Install newly created mark bitMap as "prev".
1977 swapMarkBitMaps();
1978
1979 g1h->reset_gc_time_stamp();
1980
1981 uint n_workers = _g1h->workers()->active_workers();
1982
1983 // Note end of marking in all heap regions.
1984 G1ParNoteEndTask g1_par_note_end_task(g1h, &_cleanup_list, n_workers);
1985 g1h->workers()->run_task(&g1_par_note_end_task);
1986 g1h->check_gc_time_stamps();
1987
1988 if (!cleanup_list_is_empty()) {
1989 // The cleanup list is not empty, so we'll have to process it
1990 // concurrently. Notify anyone else that might be wanting free
1991 // regions that there will be more free regions coming soon.
1992 g1h->set_free_regions_coming();
1993 }
1994
1995 // call below, since it affects the metric by which we sort the heap
1996 // regions.
1997 if (G1ScrubRemSets) {
1998 double rs_scrub_start = os::elapsedTime();
1999 G1ParScrubRemSetTask g1_par_scrub_rs_task(g1h, &_region_bm, &_card_bm, n_workers);
2000 g1h->workers()->run_task(&g1_par_scrub_rs_task);
2001
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