From b40982e8468b46b8f7f5bba5a7e541ec04a29d7d Mon Sep 17 00:00:00 2001 From: Jin Yao Date: Mon, 29 Jan 2018 18:57:53 +0800 Subject: perf report: Fix wrong jump arrow MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit When we use perf report interactive annotate view, we can see the position of jump arrow is not correct. For example, 1. perf record -b ... 2. perf report 3. In interactive mode, select Annotate 'function' Percent│ IPC Cycle │ if (flag) 1.37 │0.4┌── 1 ↓ je 82 │ │ x += x / y + y / x; 0.00 │0.4│ 1310 movsd (%rsp),%xmm0 0.00 │0.4│ 565 movsd 0x8(%rsp),%xmm4 │0.4│ movsd 0x8(%rsp),%xmm1 │0.4│ movsd (%rsp),%xmm3 │0.4│ divsd %xmm4,%xmm0 0.00 │0.4│ 579 divsd %xmm3,%xmm1 │0.4│ movsd (%rsp),%xmm2 │0.4│ addsd %xmm1,%xmm0 │0.4│ addsd %xmm2,%xmm0 0.00 │0.4│ movsd %xmm0,(%rsp) │ │ volatile double x = 1212121212, y = 121212; │ │ │ │ s_randseed = time(0); │ │ srand(s_randseed); │ │ │ │ for (i = 0; i < 2000000000; i++) { 1.37 │0.4└─→ 82: sub $0x1,%ebx 28.21 │0.48 17 ↑ jne 38 The jump arrow in above example is not correct. It should add the width of IPC and Cycle. With this patch, the result is: Percent│ IPC Cycle │ if (flag) 1.37 │0.48 1 ┌──je 82 │ │ x += x / y + y / x; 0.00 │0.48 1310 │ movsd (%rsp),%xmm0 0.00 │0.48 565 │ movsd 0x8(%rsp),%xmm4 │0.48 │ movsd 0x8(%rsp),%xmm1 │0.48 │ movsd (%rsp),%xmm3 │0.48 │ divsd %xmm4,%xmm0 0.00 │0.48 579 │ divsd %xmm3,%xmm1 │0.48 │ movsd (%rsp),%xmm2 │0.48 │ addsd %xmm1,%xmm0 │0.48 │ addsd %xmm2,%xmm0 0.00 │0.48 │ movsd %xmm0,(%rsp) │ │ volatile double x = 1212121212, y = 121212; │ │ │ │ s_randseed = time(0); │ │ srand(s_randseed); │ │ │ │ for (i = 0; i < 2000000000; i++) { 1.37 │0.48 82:└─→sub $0x1,%ebx 28.21 │0.48 17 ↑ jne 38 Committer notes: Please note that only from LBRv5 (according to Jiri) onwards, i.e. >= Skylake is that we'll have the cycles counts in each branch record entry, so to see the Cycles and IPC columns, and be able to test this patch, one need a capable hardware. While applying this I first tested it on a Broadwell class machine and couldn't get those columns, will add code to the annotate browser to warn the user about that, i.e. you have branch records, but no cycles, use a more recent hardware to get the cycles and IPC columns. Signed-off-by: Jin Yao Cc: Alexander Shishkin Cc: Andi Kleen Cc: Jin Yao Cc: Jiri Olsa Cc: Kan Liang Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/1517223473-14750-1-git-send-email-yao.jin@linux.intel.com Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/ui/browsers/annotate.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/tools/perf/ui/browsers/annotate.c b/tools/perf/ui/browsers/annotate.c index 286427975112..e2f666391ac4 100644 --- a/tools/perf/ui/browsers/annotate.c +++ b/tools/perf/ui/browsers/annotate.c @@ -319,6 +319,7 @@ static void annotate_browser__draw_current_jump(struct ui_browser *browser) struct map_symbol *ms = ab->b.priv; struct symbol *sym = ms->sym; u8 pcnt_width = annotate_browser__pcnt_width(ab); + int width = 0; /* PLT symbols contain external offsets */ if (strstr(sym->name, "@plt")) @@ -340,13 +341,17 @@ static void annotate_browser__draw_current_jump(struct ui_browser *browser) to = (u64)btarget->idx; } + if (ab->have_cycles) + width = IPC_WIDTH + CYCLES_WIDTH; + ui_browser__set_color(browser, HE_COLORSET_JUMP_ARROWS); - __ui_browser__line_arrow(browser, pcnt_width + 2 + ab->addr_width, + __ui_browser__line_arrow(browser, + pcnt_width + 2 + ab->addr_width + width, from, to); if (is_fused(ab, cursor)) { ui_browser__mark_fused(browser, - pcnt_width + 3 + ab->addr_width, + pcnt_width + 3 + ab->addr_width + width, from - 1, to > from ? true : false); } -- cgit v1.2.3